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Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 25
Technical content
Features
- SD/HD operation: 143, 177, 270, 360, 540, 1483.5, 1485 Mbps and DVB-ASI at 270 Mbps
- Auto and manual rate selection modes with rate indication in Auto
- 4:1 Input MUX and Loss of Lock (LOL) indicator
- Input buffers are compatible with PCML voltage levels
- Differential I/O with on chip termination resistors
- Selectable auto MUTE or BYPASS with manual BYPASS option
- Pin to pin compatible with GS1575 (without serial clock out and loss of signal indicator)
- Low typical power dissipation (430 mW @ 3.3V)
- 3.3V power supply operation
- Extended temperature operation: -10°C to +85°C Functional Block Diagram Multi-Rate Reclocker Core Phase/Frequency Detector Charge Pump Loop Filter VCO 4:1 Data MUX DDI0/DDI0 2IN_SEL[1:0] DDI1/DDI1 DDI2/DDI2 DDI3/DDI3 VDDI_TERM[3:0] XTAL Oscillator XTAL Buffer XTL_IN XTL_OUT XT L_OUT Bypass/Mute Logic Bypass MUX LPF LPF AUTO_BYPASS MAN_BYPASS Control Logic
3 RATE[2:0]
ARD_EN LBW_INC 177_L/O DDO DDO Output Buffer XTL_IN DDO_MUTE
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
Ordering Information
Part Number Package Operating Data Rate Operating Temperature M21315G-XX* 64-pin, MLF, RoHS compliant 143 - 1485 Mbps –10 °C to 85 °C * The letter “G” designator after the part number indicates that the device is RoHS-compliant. Consult the MACOM price list for exact part numbers when ordering.
Revision History
Revision Level Date Description V2 Release May 2015 Updated logos and page layout. No content changes. B (V1) Release March 2008 Revised packaging dimensions graphic Figure 1-2. A Preliminary August 2007 Preliminary Release.
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support M21315 HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 Table of Contents
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support M21315 HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 List of Tables
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support M21315 HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
1.0 Product Specification
1.1 General Specifications
Table 1-1. Absolute Maximum Ratings Symbol Parameter Minimum Maximum Units VDD Device Power V SS - 0.5 V SS + 3.6 V VHS High-Speed Signal Pins V SS - 0.5 V SS + 0.5 V VID Control/Interface Pins V SS - 0.5 V SS + 0.5 V TSTORE Storage Temperature – 65 +150 °C ESDHBML Human Body Model (low-speed pins) 2000 — V ESDHBMH Human Body Model (high-speed pins) 2000 — V ESDCDM Charged Device Model 500 — V IDC Maximum DC input current — 25 mA NOTE: 1. No Damage Table 1-2. Recommended Operating Conditions Symbol Parameter Notes Minimum Typical Maximum Units VDD Device Power — 3.14 3.3 3.47 V VSS VSS: Chip Ground — — 0 — V TAMB Ambient Temperature — -10 — +85 °C θJA Junction to ambient Thermal Resistance — — 28.6 — °C/W (1)
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
1.2 Input/Output Level Specifications:
Table 1-3. DC Power Electrical Specifications Symbol Parameter Notes Minimum Typical Maximum Units Total IDD Total IDD(constant for all supply voltages) 1, 3 — 130 150 mA Total PDISS3.3V Total PDISS (@3.3V) 2 — 430 520 mW NOTES: 1. Entire table specified at recommended operating conditions - see Table 1-2. 2. Typical computed with nominal power supply voltage, maximum computed with nominal +5% power supply voltage. 3. Current specified with 800 mV differential output swing. Table 1-4. CMOS I/O Electrical Specifications Symbol Parameter Notes Minimum Typical Maximum Units VOH Output Logic High 1 0.8 x V DD VDD —V VOL Output Logic Low 1 — 0.0 0.2 x V DD V IOH Output Current (logic high) — -10 — 0 mA IOL Output Current (logic low) — 0 — 10 mA VIH Input Logic High — 0.75 x V DD —V DD + 0.3 V VIL Input Logic Low — 0 — 0.25 x V DD V IIH Input Current (logic high) — -100 — 100 μA IIL Input Current (logic low) — -100 — 100 μA NOTE: 1. Entire table specified at recommended operating conditions - see Table 1-2. Specification is for a maximum load of 20 pF.
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 Table 1-5. High-Speed Input Electrical Specifications Symbol Parameter Notes Minimum Typical Maximum Units DRIN Input Bit Rate (reclocker bypassed) — 0 — 1500 Mbps DRIN Input Bit Rate (reclocker enabled) — 143 — 1485 Mbps VID Input Differential Voltage (peak - peak) 2,3 100 — 2000 mV VICM Input Common-Mode Voltage — V SS + 1.15 — AV DD V VIMAX Maximum Input High Voltage — — — AV DD + 400 mV VIMIN Minimum Input Low Voltage — V SS+1.0 — — V ΔVTT Maximum voltage difference between input common-mode voltage and VDDI_TERM[3:0] —— — 6 0 0 m V RIN VDDI_TERM[3:0] input termination impedance to AVDD —4 0 5 0 6 0 Ω NOTES: 1. Specified at recommended operation conditions-see Table 1-2 2. Example 1200 mV pp differential = 600 mVpp for each single-ended terminal 3. Minimum input level defined as error free operation at 10 -12 BER with PRBS input pattern Table 1-6. High-speed Output Electrical Specifications Symbol Parameter Notes Minimum Typical Maximum Units tr/tf Rise/Fall Time (20-80%) for all levels — — 120 150 ps VOCM Output Common Mode Voltage — V DD –525 — V DD –350 mV VOD Differential Output Voltage Swing 3 1300 1600 2000 mV RO VDDO_TERM Termination impedance to VDD —4 0 5 0 6 0 Ω NOTES: 1. Specified at recommended operating conditions – see Table 1-2 2. Example 1200 mV P-P differential = 600 mV P-P for each single-ended terminal. 3. Measured with a 50 Ω high speed oscilloscope.
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
1.3 Reclocker Performance Specifications
Table 1-7. Reclocker Output Jitter Performance Symbol Parameter Notes Minimum Typical Maximum Units JERMS Reclocker Enabled Output Data Jitter @ 1.485 Gbps (RMS) 1,2 — 5.5 9 ps JEPP Reclocker Enabled Output Data Jitter @ 1.485 Gbps (pp) 1,2 — 38 55 ps JEPP Reclocker Enabled Output Data Jitter @ 1.485 Gbps (pp) 1,2 — 56 80 mUI JBRMS Reclocker Bypassed Output Data Jitter @ 1.485 Gbps (RMS) 1,2 — — 6 ps JBPP Reclocker Bypassed Output Data Jitter @ 1.485 Gbps (pp) 1,2 — — 35 ps JBPP Reclocker Bypassed Output Data Jitter @ 1.485 Gbps (pp) 1,2 — — 52 mUI JEPP Reclocker Enabled Output Data Jitter @ < 600 Mbps (pp) 1,2 — — 40 mUI JERMS Reclocker Enabled Output Data Jitter @ < 600 Mbps (RMS) 1,2 — — 6.7 mUI JBPP Reclocker Bypassed Output Data Jitter @ < 600 Mbps (pp) 1,2 — — 30 mUI JBRMS Reclocker Bypassed Output Data Jitter @ < 600 Mbps (RMS) 1,2 — — 5 mUI NOTES: 1. All jitter is measured using a 2 23-1 PRBS pattern, and/or HD/SD-SDI color bar test pattern. 2. All jitter is measured using a wideband scope (minimum 10 GHz bandwidth). Table 1-8. Reclocker High-speed Performance Symbol Parameter Notes Minimum Typical Maximum Units JTOL PLL pathological pattern jitter tolerance 2 0.4 — — UI LBWPK Loop bandwidth peaking — 0.1 — dB tLKA Asynchronous Lock (Auto Rate Detect lock time) 3 — 2 5 ms tLKS Synchronous Switch Lock TIme @ 1.485 Gbps 4 — 110 150 ns tLKS Synchronous Switch Lock TIme @ 270 Mbps 4 — 330 400 ns NOTES: 1. Entire table specified at recommended operating conditions – see Table 1-2. 2. Jitter tolerance is measured with pathological test pattern. 3. Switching from one data rate to a different data rate. 4. Switching from one data rate to the same data rate.
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 Figure 1-1. Output Symbols Definition VOD tr tf VOH VOL JOPP VOH: Average voltage high level VOL: Average voltage low level VOD: (VOH) – (VOL) VOCM: Common Mode Voltage JOPP: Output Jitter Peak-Peak tr: 20-80% Rise Time tf: 80-20% Fall Time VOCM NOTE: Waveform above is differential.
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
1.4 Package Specification
The M21315 is available in a 64-pin 9 mm x 9 mm MLF package. The package drawing is shown in Figure 1-2. The M21315 is available in a package that is fully RoHS compliant. Figure 1-2. Package Drawing
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
1.5 Manufactureability
The values shown in this section may change; however, these are standard requirements.
1.5.1 Electrostatic Discharge
Tested per JESD22-A114. This device passes 2000V of ESD Human Body Model (HBM) testing. Tested per JESD22-C101. This device passes 500V of ESD Charged Device Model (CDM) testing. Tested per EIA/JESD78. This device passes 150mA of trigger current at 85°C during Latchup testing.
1.5.2 Peak Reflow Temperature
M21315G (RoHS compliant package): Peak reflow temperature is 260°C per JEDEC standards.
1.5.3 Moisture Sensit ivity Level (MSL)
All versions of this device (Std Pb-type and RoHS compliant packages) are Moisture Sensitivity Level (MSL) 3 per J-STD-020B and J-STD-033.
1.6 Design Considerations
See Digital Video Interfacing Application Note (212xx-APP-001-A) for guidance on the following:
- Component Placement and Layout
- Routing Considerations
1.6.1 Thermal Considerations
The M21315 consumes less power than legacy devices, therefore they will co ntribute less th ermal energy and should result in a lower operating temperature.
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support M21315 HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
2.0 Functional Description
2.1 General Description
2.1.1 Reclocker General Overview
The M21315 reclocker is a dual-loop based design. The pr imary phase-locked loop (PLL) functions to 1) lock the VCO to the incoming data rate and 2) to retime the incoming data to remove jitter. In general, the VCO tuning range for a multi-rate design is much larger than the frequency pull-in range of the reclocker phase detector. As a result, a secondary frequency-locked loop (FLL) is added to tune the VCO to the approximate data frequency so the clock and data recovery unit (CDR) can lock onto valid data. The FLL uses an external crystal as an absolute frequency reference. As a result, the external reference is only used to assist the CDR frequency locking and the jitter performance of the reference has no effect on the recovered data output jitter.
2.1.2 Frequency Acquisition
When the reclocker is out of lock (LOL = Low), the FLL is enabled. The FLL compares the input data to the external reference and drives the VCO towards a target frequency t hat is very close to the incoming data rate frequency. The FLL is shut off when the VCO frequency and the frequency of the input data are within +/- 2000 ppm of each other. When FLL is shut off, LOL = High, to indicate a lock condition. If data is present, then the phase lock loop of the reclocker will lock to the incoming data. When in lock, the FLL control circuit continues to monitor the frequency difference between the VCO and the reference. If the diff erence exceeds +/- 3000 ppm, a loss of lock condition is indicated and frequency acquisition is initiated. If there is no input data present, an internal loss of signal detector will keep LOL=Low until an input signal has been detected. The output signal from the reclocker is undefined when there is no valid signal at the input of the reclocker. When a valid input signal is detected, frequency acquisition is initiated and the reclocker will lock to the appropriate data rate.
2.2 Pin Descriptions
2.2.1 General Nomenclature
Throughout this data sheet, physical pins will be denoted in bold print. An array of pins can be called by each
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
2.2.2 Pin Descriptions
Table 2-1. Control/Interface/Low-Speed Pins (1 of 2) Pin Name Pin # Function Default Type XTL_IN/XTL_IN 52,53 Reference clock or crystal input. For GS1575B compatible operation, a 14.140 MHz series resonance crystal is required. Internal pull up I-Analog XTL_OUT/XTL_OUT 50,51 Reference frequency output for chained reclocker applications — O-Analog IN_SEL[1:0] 18,17 Input control signal that selects the active high-speed serial input 00b: Select DDI0/DDI0 01b: Select DDI1/DDI1 10b: Select DDI2/DDI2 11b: Select DDI3/DDI3 Internal pull down I-CMOS ARD_EN 21 Input control signal that enables Auto Rate Detect (ARD) functionality or manual rate setting mode. ARD_EN = High: Auto Rate Detector (ARD) enabled, ARD_EN = Low: Manual rate selection mode Internal pull up I-CMOS RATE[2:0] 26,25,24 Bidirectional control signals used to indicate the data rate in ARD enabled mode or to force a data rate setting in Manual mode ARD_EN = High: RATE[2:0] pins indicate the date rate the M21315 is locked to according to pin decoding shown below ARD_EN = Low: RATE[2:0] pins are used to force a particular data rate according to the pin decoding shown below. RATE[2:0] = 000: 143 Mbps data rate RATE[2:0] = 001: 177 Mbps data rate RATE[2:0] = 010: 270 Mbps data rate RATE[2:0] = 011: 360 Mbps data rate RATE[2:0] = 100: 540 Mbps data rate RATE[2:0] = 101: 1483.5/1485 Mbps data rate Internal pull down I/O- CMOS 177_L/O 27 Input control signal used to lock out the 177Mbps data rate from the ARD search order sequences. This signal is mainly for drop-in compatibility with the GS1535 as the M21315 locks correctly with DVB-ASI data. 177_L/O = High: 177 Mbps data rate locked out from ARD search order 177_L/O = Low: 177 Mbps data rate included in ARD search order Internal pull up I-CMOS
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 LOL 28 Output Status indication signal for reclocker Loss of Lock. See the Frequency Acquisition section for more detailed information. LOL = High: Reclocker PLL is locked LOL = Low: Reclocker PLL is not locked —O - C M O S SD/HD 33 Output status indication signal to control slew rate of downstream cable driver. SD/HD = High: Reclocker locked to a SD data rate (143-540 Mbps) SD/HD = Low: Reclocker locked to a HD rate (1.4835/1.485 Gbps) —O - C M O S AUTO_BYPASS 20 Input control signal that automatically bypasses the data directly from the input to the output if the Reclocker PLL can NOT lock to the incoming data stream. AUTO_BYPASS = High: Auto bypass reclocker if lock is not achieved AUTO_BYPASS = Low: Reclocker continues to attempt data lock but output data BER may be high. Internal pull up I-CMOS MAN_BYPASS 19 Input control signal used to force a reclocker PLL bypass regardless of the setting of the AUTO_BYPASS signal. MAN_BYPASS = High: Force bypass (regardless of Autobypass state) MAN_BYPASS = Low: Enables normal AUTO_BYPASS operation Internal pull down I- CMOS DDO_MUTE 36 Input control signal that forces the DDO/DDO outputs to logic low states. DDO-MUTE = High: Normal output operation DDO-MUTE = Low: Forces output to a logic low state Internal pull up I-CMOS LPF/LPF 62,63 Loop Filter inputs on GS1535 that are left FLOATING on M21315. Loop filter is internal. Leave pins floating. —A n a l o g LBW_INC 34 Input control signal used to increase the loop bandwidth (LBB) of the M21315. LBW_INC pin 34 can be used alone to increase the LBW of the M21315 as a GS1575B compatible function. LBW_INC = 0: 3.5 MHz HD LBW, 1.0 MHz SD LBW LBW_INC = 1: (default) 1.5 MHz HD LBW, 0.52 MHz SD LBW Internal pull up I-CMOS NC 29,35,38,39, 40,45,54,55, 56,57,58,59 No internal connection. — — NOTES: 1. Internal pull-up/pull-down is 100 K Ω. 2. NAME/RSVD Indicates additional features of the M21315 that are mapped to the reserved pins of the GS1535. When left floating as recommended by the GS1535 data sheet, the M21315 defaults to a pin for pin and functionally compatible mode. Table 2-1. Control/Interface/Low-Speed Pins (2 of 2) Pin Name Pin # Function Default Type
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 Table 2-2. Power Pins Pin Name Pin # Function Type 32,37,42,43,48, 49,60,64 Power Supply Ground Power VDD 22,41,47,61 Positive Power Supply Power AVDD_VCO 30 VCO Power Supply This pin should be connected to a “quiet” power supply. Power Center Pad —G r o u n d Power Table 2-3. High-speed Signal Pins Pin Name Pin # Function Default Type DDI/DDI[3:0] 1,3,5,7,9, 11,13,15 Non-inverting and inverting high speed serial data inputs. Inputs are compatible with PCML, LVDS, or LVPECL voltage levels. 100Ω differential I-High-speed VDDI_TERM[3:0] 2,6,10,14 Input termination pin (center tap for 100 Ω) Case 1: Tie to a positive supply for 50Ω to supply terminal Case 2: Leave floating and decouple to ground for 100Ω differential I-Low-speed DDO/DDO 44,46 Non-inverting and inverting high speed serial data outputs. 100 Ω differential O-High-speed
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
2.2.2.1 Reset
The M21315 reclocker automatically resets after power up thus an external reset is not required. The M21315 is fully operational 10 ms after the power supply has stabilized to within 10% of the final value. Figure 2-1. M21315 Pin Out Center Pad AVss 1DDIO VDDI_TERM0 DDIO Vss Vdd DDO 61626364IN_SEL[0] AUTO_BYPASS 20191817 Vss LPF Vdd Top View Vss 57585960 Vss NC NC 53545556 49505152 XTL_IN Vss Vss Vss DDO DDO_MUTE Vss Vdd ___ SD /HD LBW _INC NC ARD_EN Vss RATE[0] 24232221 177_L/O NC 28272625 Avdd_VCO Vss Vss 32313029 LOL DDI1 VDDI_TERM1 DDI1 Vss DDI2 VDDI_TERM2 DDI2 Vss DDI3 Vss IN_SEL[1] Vdd RATE[1] RATE[2] LPF XT L_IN XTL_OUT XTL_OUT NC NC NC NC NC NC NC NCVDDI_TERM3 DDI3 MAN_BYPASS
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
2.2.2.2 Input Selection Multiplexer
The M21315 contains a 4:1 input selection multiplexer. The IN_SEL[1:0] pins select one of the four possible inputs that will be retimed by the reclocker block and passed to the output. The mapping of the multiplexer pins is shown in Table 2-1. If the I N_SEL[1:0] pins are left floating, the 4:1 input multiplexer defaults to input DDI0/DDI0.
2.2.2.3 High-Speed I/O Pins
The high-speed inputs are designed to be used in both AC coupled and DC coupled (PCML) modes. The high- speed differential inputs contain on-chip 50Ω termination from DDI[n] to VDDI_TERM[n] as well as from DDI[n] to VDDI_TERM[n]. With VDDI_TERM[n] tied to V DD, the single-ended input impedance is 50 Ω. This mode is recommended for AC coupled inputs or with DC coupled PCML when the PCML is driven from the same supply voltage. For use in other DC coupled situations, it is recommended that the termination voltage for the M21315 be floated. For backwards co mpatibility with the GS1575B, VDDI_TERM[n] contains a weak internal bias near VDD and the pin can be left floating for direct connect ion to the M21324 or the GS1524. In all cases, VDDI_TERM[n] should be decoupled to VSS to reduce input noise with a 10nF capacitor. The GS1575B compatible input and an alternative is shown in Figure 2-2 and Figure 2-3. Figure 2-2. Input Circuit for GS1575B Drop-in M21315 VDDI_TERMx DDIx DDIx 10nF 50Ω 50 Ω 8 kΩ 28 kΩ VDD
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 The high-speed output contains integrated 50 Ω resistors from both DDO and DDO to VDDO_TERM. VDDO_TERM should be bypassed to VSS with a 10nF capacitor. VDDO_TERM is internally biased to VDD. The output swing and common mode of the M21315 is the same as those of the GS1575B.
2.2.2.4 Reclocker Reference Frequency
The reclocker frequency acquisition requires an external crystal connected to XTL_IN/XTL_IN. For daisy-chained reclocker applications, a buffered reference output is made available on XTL_OUT/XTL_OUT. The input reference frequency is 14.140 MHz. A 14.140 MH z series resonant crystal with the same form factor as the GO1535 crystal should be used. The crystal should be connected as shown in Figure 2-4 below. A 56Ω resistor is recommended. Figure 2-3. Input circuit for DC/AC coupled General Case Figure 2-4. Crystal Interface M21315 VDDI_TERMx DDIx DDIx 10nF 50 Ω 50 Ω VDD or Input Common Mode 8 kΩ 28 kΩ VDD XTL_OUT XTL_OUTCrystal To reclocker core XTL_IN XTL_IN This resistor is used with a 14.14 MHz crystal and should be approximately 56 ohms .
14.14 MHz
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 The series resonant crystal should ope rate at 14.14MHz with a frequency stability of +/- 50 ppm or better, equivalent series resistance of 80Ω or less, drive level of < 0.2 mW, and static capacitance of less than 5.0 pF. The M21315 can also operate with a referenc e from an external clock buffer or oscillator instead of a crystal. The M21315 can accept a single ended or differential 14.14 MH z reference clock. When driving the M21315 with a single ended reference clock, the cloc k signal should be connected to the XTL_IN pin and the XTL_IN pin should be left floating. If the XTL_IN pins on the M21315 are connected to a clock driver or oscillator, the requirements for the signal connected to the M21315 are detailed in Table 2-4.
2.2.2.5 Reclocker Loop Bandwidth
Unlike the GS1575B, the loop filter for the M21315 recloc ker is fully integrated into the part. As a result, LPF/LPF pins are used for MACOM testing and should be left floating. This can be accomplished by not populating the loop filter capacitor used with the GS1575B. As in the GS1575B, when LBW_INC =Floating, a lower bandwidth of 1.5 MHz for 1485 Mbps data rates and 0.52 MHz for 270 Mbps data rates is selected. For other SD-SDI rates, the bandwidth scales proportionately to the bit rate, using the 270 Mbps as a reference p oint. For example, at 540 Mbps, the bandwidth is 2x the 270 Mbps bandwidth. When LBW_INC = Low, the bandwidth increases to 3.5 MHz for 1485 Mbps data rates and 1 MHz for 270 Mbps data rates. LBW_INC HD LOOP BANDWIDTH SETTING (1485 Mbps) SD LOOP BANDWIDTH SETTING (270 Mbps) 0 3.5 MHz 1.0 MHz 1 1.5 MHz (default) 0.52 MHz (default) NOTE: Typical values. Loop bandwidth scales to lower frequency with reduced data rates. Table 2-4. Reference Clock/Oscillator Input Specifications Mode
14.14 MHz Reference Frequency
Input Common Mode VDD-2.0 VDD-1.2 Differential input swing (p-p) 500mV Single ended input swing (p-p) 250mV Drive Impedance 60Ω NOTES: 1. When driving a reference clock single ended, connected the clock signl to the XTL_IN pin and leave the XTL_IN pin floating. 2. TTL Input levels are supported for 14.14 MHz reference frequency. 3. With a 14.14 MHz reference, the reference signal can be cascaded from one M21315 to another. Table 2-5. Loop Bandwidth Control Settings
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2
2.2.2.6 Loss of Lock Alarm
A loss of lock alarm pin, LOL, is provided to indicate if the reclocker is in lock. When the reclocker has achieved lock, LOL = High. If the reclocker is out of lock, LOL = Low. For synchronous switching at the same data rate, the lock time is lower if a higher loop bandwidth is selected.
2.2.2.7 Auto Rate Detect (ARD)
The reclocker is designed to operate in two modes. In the first mode, with ARD_EN = High, the Auto Rate Detect is enabled which automatically locks the CDR to the rates typically used in SD -SDI, HD-SDI, and DVB-ASI applications. The locked data rate is then reported with the RATE[2:0] pins as shown in Table 2-6. The M21315 does not have any of the false lock issues exhibited by the GS1535 or the GS1575B with DVB/ASI 8b/10b encoded data or idle patterns; however, for backwards compatibility, it is possible to lock out the 177 Mbps data rate by setting 177_L/O = High which removes 177Mbps from the ARD search sequence. Note that this pin is only active if ARD_EN = High. With the ARD disabled (ARD_EN = Low), the reclocker locking frequency is forced by using the RATE[2:0] pins as inputs and selecting the data rate as shown in Table 2-7. For system reporting purposes as well as to set the output slew rate on the cable drivers, the SD/HD output is used to indicate if the reclocker has locked to a HD rate. For SD-SDI rates, SD/HD = High and for the HD-SDI rate SD/ HD =Low. This pin is used to set the output slew rate of the downstream cable driver. Table 2-6. Rate Report Mapping when ARD is Enabled RATE[2:0] Bit Rate 000b 143 Mbps 001b 177 Mbps 010b 270 Mbps 011b 360 Mbps 100b 540 Mbps 101b 1485/1483.5 Mbps Table 2-7. Rate Sele ct with ARD Disabled RATE[2:0] Bit Rate 000b 143 Mbps 001b 177 Mbps 010b 270 Mbps 011b 360 Mbps 100b 540 Mbps 101b 1485/1483.5 Mbps
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 177_L/O = High would remove the 177 Mbps rate from the search sequence resulting in a slightly faster asynchronous lock time but as there are not any false lo cking issues with DVB-ASI with the M21315 this is not required. Also, if the M21315 is out-of-lock, the search p attern will not start unles s the M21315 detects that there are transitions in the data through an internal loss of signal detector.
2.2.2.7.1 Bypass and DDO_MUTE
The reclocker can be forced into the bypass mo de (input data to output without retiming) with MAN_BYPASS = High. With MAN_BYPASS = Low (normal operation), AUTO_BYPASS = High enables the auto bypass mode that puts the reclocker into the bypass mode whenever LOL = Low (ie. the reclocker is out of lock). This implies that if both MAN_BYP ASS and AUTO_BYPASS = Low, when the reclocker is not in lock, undefined data may pass to the output. This mode may be used for troubleshooting or debug purposes. The reclocker output can be forced to a logic low with DDO_MUTE = Low. This function can be used to squelch the retimed noise output, or random transitions that are generated by AC coupled inputs when the upstream signals are disconnected. MAN_BYPASS AUTO_BYPASS Functional Description 0 0 Retimed Reclocker Output 0 1 Bypass if Reclocker out of lock 1 0 Forced Bypass 1 1 Forced Bypass Table 2-8. Manual and Auto Bypass Settings
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support M21315 HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2 Appendix A.1 Glossary of Terms/Acronyms A.2 Reference Documents A.2.1 External Society of Motion Picture and Television Engineers SMPTE 292M Bit-Serial Digital Interface for High-Definition Television Systems SMPTE 259M 10-Bit 4:2:2 Component and 4fSC Composite Digital Signals - Serial Digital Interface SMPTE 344M 540Mb/s Serial Digital Interface DVB-ASI Digital Video Broadcast Table A-1. Glossary and Acronyms DTV Digital Television DVB Digital Video Broadcast EQ Equalizer or Equalization HD High Definition SD Standard Definition SDI Serial Digi tal Interface SMPTE Society of Motion Picture and Television Engineers
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. Visit www.macom.com for additional data sheets and product information. For further information and support please visit: http://www.macom.com/support M/A-COM Technology Solutions Inc. All rights reserved. Information in this document is provided in connect ion with M/A-COM Technology Solutions Inc ("MACOM") products. These materials are provided by MACOM as a service to its customers and may be used for informational purposes only. Except as provided in MACOM 's Terms and Conditions of Sale for such products or in any separate agreement related to this document, MACOM assumes no liability whatsoever. MACOM assumes no responsibility for errors or omissi ons in these materials. MACOM may make changes to specifications and product descriptions at any time, without notice. MA COM makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities ar ising from future changes to its specifications and product descriptions. No license, ex press or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO SALE AND/OR USE OF MACOM PRODUCTS INCL UDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES, MERCHANTABILITY, OR INFRINGEME NT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. MACOM FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. MACOM SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LI MITATION, LOST REVENUES OR LOST PROFITS, WHICH MAY RESULT FROM THE USE OF THESE MATERIALS. MACOM products are not intended for use in medical, lifesaving or life sustaining applications. MACOM customers using or selling MACOM products for use in such applications do so at their own risk and agree to fully indemnify MACOM for any damages resulting from such improper use or sale. M21315 HD/SD-SDI Auto-rate Reclocker w/4:1 Selector Rev V2