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Document overview

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Technical content

Features

  • 1:2 Gigabit LAN Switch
  • Power-down support
  • Low bit-to-bit skew: 200ps
  • Very Low Crosstalk: –75dB @ 250MHz
  • Status Indicator LEDs Switched with Ethernet pairs
  • V DD Operating Range: +3.0V to +3.6V
  • Enhanced ESD Protection (on A, B, C, LED pins): – 8kV (contact) (1) – 1.0kV (machine model), 11kV (human body model)
  • >650 MHz bandwidth
  • Packaging: – 56-contact TQFN (5 x 11mm, 0.5 pitch) – 42-contact TQFN (3.5 x 9mm, 0.5 pitch) – 42-contact TQFN (3.5 x 7mm, 0.4 pitch)

Description

The PI3L720 is a 8-Channel 2:1 multiplexer/demultiplexer LAN Switch with Hi-Z outputs. Industry leading advantages include a propagation delay of less than 250ps, resulting from its low channel resistance and I/O capacitance. The device multiplexes differential outputs from a Gigabit Ethernet transceiver (PHY) device to one of two corresponding B or C outputs. The switch is bidirectional and offers little or no attenuation of the high-speed signals at the outputs. It is designed for low bit-to-bit skew, high channel-to- channel noise isolation and is compatible with various standards, such as 10/100/1000 Base-T (Ethernet). The PI3L720 provides a Power Down input (PD), which can put the device into standby mode (PD=1) while mobile, eliminating an external power switch. Generally, this part can be used to replace mechanical relays in low-voltage LAN applications that interface a physical layer over CAT 5 or CAT 6 unshielded twisted pair cable through an isolation transformer. Block Diagram PI3L720 2:1 Mux/DeMux Gigabit Ethernet LAN Switch with Power-down Mode SEL A3- A3+ A0- A0+ B0- B0+ C0- C0+ B3- B3+ C3- C3+ PD POWER DOWN LEDA0 LEDA1 LEDA2 LEDB0 LEDC0 LEDB1 LEDC1 LEDB2 LEDC2 Truth Table PD SEL Function L L A X to BX; LEDAX to LEDBX L H A X to CX; LEAX to LEDCX H x Hi-Z Note: 1. IEC 6100-4-2

Applications

  • Dual Physical Layer Device sharing to one interface connector , or one controller to dual connectors for docking Routes signals for 10/100/1000 Mbit Ethernet PERICOM CONFIDENTIAL PENDING APPROVAL

2:1 Mux/DeMux Gigabit Ethenet LAN Switch with Power-down Mode Pin Description Pin Name Description AX+, AX- Port A DeMux I/O BX+, BX- Port B Mux I/O CX+, CX- Port C LED Mux I/O GND Ground LEDZX LED I/O PD Power Down. Active high, with internal pull-down resistor SEL Select VDD Power Pin Configuration (42-TQFN ZH, Top-Side View) VDD A0+ A0- VDD PD A1+ A1- VDD A2+ A2- A3+ A3- SEL VDD LEDA0 LEDA1 LEDB0 B0+ B0- C0+ C0- B1+ B1- C1+ C1- V DD B2+ B2- C2+ C2- B3+ B3- C3+ C3- LEDA2 LEDB2 LEDC2 V DD LEDB1 LEDC0 LEDC1 VDD GND Pin Configuration (56-TQFN Top-Side View) GND A0+ A0- VDD PD GND A1+ A1- GND VDD A2+ A2- GND A3+ A3- GND SEL VDD LEDA0 LEDA1 VDD GND LEDA2 GND LEDB2 LEDC2 V DD GND GND LEDB0 LEDB1 GND LEDC0 LEDC1 V DD GND B0+ B0- C0+ C0- GND B1+ B1- C1+ C1- GND V DD B2+ B2- C2+ C2- GND B3+ B3- C3+ C3- GND Pin Configuration (42-TQFN ZL, Top-Side View) VDD A0+ A0- VDD PD A1+ A1- VDD A2+ A2- A3+ A3- SEL VDD LEDA0 LEDA1 B0- C0+ C0- B1+ B1- C1+ C1- V DD B2+ B2- C2+ C2- B3+ B3- C3+ C3- LEDA2 LEDB2 LEDC2 V DD LEDB1 LEDC0 LEDC1 VDD GND 17LEDB0

38 B0+

2:1 Mux/DeMux Gigabit Ethenet LAN Switch with Power-down Mode (TA = –40°C to +85°C, VDD = 3.3V ±10%) Paramenter Description Test Conditions(1) Min. Typ. (2) Max. Units VIH Input HIGH V oltage Guaranteed HIGH level (Control Pins) 2.0 – – VVIL Input LOW V oltage Guaranteed LOW level (Control Pins) –0.5 – 0.8 VIK Clamp Diode V oltage VDD = Max., IIN = –18mA – –0.7 –1.2 IIH Input HIGH Current VDD = Max., VIN = VDD – – ±2 µAIIL Input LOW Current VDD = Max., VIN = GND – – ±2 RON Switch On-Resistance (3) VDD = Min., 1.5V ≤ VIN ≤ VDD IIN = –40mA – 4.0 6.5 OhmRFLAT(ON) On-Resistance Flatness (3) VDD = Min., VIN @ 1.5V and VDD IIN = –40mA – 0.5 – ΔRON On-Resistance match from center ports to any other port(3) VDD = Min., 1.5V ≤ VIN ≤ VDD IIN = –40mA – 0.4 1.0 (TA = –40°C to +85°C, VDD = 3.3V ±10%) Paramenter Description Test Conditions(1) Min. Typ. (2) Max. Units VIH Input HIGH V oltage Guaranteed HIGH level (Control Pins) 2.0 – – VVIL Input LOW V oltage Guaranteed LOW level (Control Pins) –0.5 – 0.8 VIK Clamp Diode V oltage V DD = Max., IIN = –18mA – –0.7 –1.2 IIH Input HIGH Current VDD = Max., VIN = VDD – – ±2 µAIIL Input LOW Current VDD = Max., VIN = GND – – ±2 RON Switch On-Resistance (3) VDD = Min., 1.25V ≤ VIN ≤ VDD IIN = –10mA to –30mA – 4.0 6.5 OhmRFLAT(ON) On-Resistance Flatness(3) VDD = Min., VIN @ 1.25V and VDD IIN = –10mA to –30mA – 0.5 – ∆RON On-Resistance match from cen- ter ports to any other port (3) VDD = Min., 1.25V ≤ VIN ≤ VDD IIN = –10mA to –30mA – 0.4 1.0 Supply to +4.0V to +5.5V DC Output Current Power Dissipation Note: Stresses greater than those listed under MAXIMUM RAT- INGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for ex- tended periods may affect reliability. Maximum Ratings (Above which useful life may be impaired. For user guidelines, not tested.) PERICOM CONFIDENTIAL PENDING APPROVAL

2:1 Mux/DeMux Gigabit Ethenet LAN Switch with Power-down Mode Power Supply Characteristics Parameters Description Test Conditions(1) Min. Typ. (2) Max. Units IDD-Standby(3) Quiescent Power Supply Current V DD = Max., VIN = GND or VDD — 0.3 0.5 mA IDD-Active(3) Active Power Supply Current V DD = Max., VIN = VDD or GND 1.0 1.5 mA IDD-PD(3) Power Down Current PD = 1, VDD = MAX, VIN = VDD or GND 0.15 0.25 mA Notes: For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. T ypical values are at VDD = 3.3V , TA = 25°C ambient and maximum loading. Measured by the voltage drop between A and B pins at indicated current through the switch. ON resistance is determined by the lower of the voltages on the two (A & B) pins. This parameter is determined by device characterization but is not production tested. Capacitance(TA = –40°C to +85°C, VDD = 3.3V ±10%) Parameters(4) Description Test Conditions(1) Min. Typ. Max. Units CIN Input Capacitance VIN = 0V , f = 1MHz 2.0 3.0 pFCOFF(B1, B2) Port B Capacitance, Switch OFF 3.0 6.0 CON(A/B) A/B Capacitance, Switch ON 8.0 11.0 Notes: For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. T ypical values are at VDD = 3.3V , TA = 25°C ambient and maximum loading.. Active power represents normal data communication. Standby power is when the device is enabled for operation but there is no LAN traffic (cable not connected). Power down current is the minimum power state used when not connected and mobile. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 0.25ns for 10pF load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interactions with the load on the driven side. Dynamic Electrical Characteristics Over the Operating Range (TA = –40°C to +85°C, VDD = 3.3V ±10%) Parameter Description Test Conditions(1) Min. Typ. (2) Max. Units XTALK Crosstalk(3) RL = 100-Ohm, f = 250MHz — –75 — dBOIRR OFF Isolation(3) — –35 — BW Bandwidth –3dB(3) RL = 100-Ohm — 650 — MHz Notes: For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. T ypical values are at VDD = 3.3V , TA = 25°C ambient and maximum loading.. Guaranteed by design. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 0.25ns for 10pF load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interactions with the load on the driven side. PERICOM CONFIDENTIAL PENDING APPROVAL

2:1 Mux/DeMux Gigabit Ethenet LAN Switch with Power-down Mode Notes: For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. T ypical values are at VDD = 3.3V , TA = 25°C ambient and maximum loading.. Guaranteed by design. The bus switch contributes no propagational delay other than the RC delay of the ON resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 0.25ns for 10pF load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interactions with the load on the driven side. Switching Characteristics (TA = -40°C to +85°C, VDD = 3.3V ± 10%) Paramenter Description Min. Typ. (2) Max. Units tPD Propagation Delay (3,4) – 0.25 ns tPZH, tPZL Line Enable Time - SEL to AN, BN 0.5 – 15.0 tPHZ, tPLZ Line Disable Time - SEL to AN, BN 0.5 – 5.0 tSK(o) Output Skew between center port to any other port(3) – 0.1 0.2 tSK(p) Skew between opposite transitions of the same output (tPHL - tPLH) (3) – 0.1 0.2 tON/OFF Device enable / disable time from PD 100 200 PERICOM CONFIDENTIAL PENDING APPROVAL

2:1 Mux/DeMux Gigabit Ethenet LAN Switch with Power-down Mode Test Circuit for Electrical Characteristics Notes: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator Test Circuit for Dynamic Electrical Characteristics VDD D.U.T T1R1S1 HP11667A 50-Ohm10pF HP8753ES Switch Positions Test Switch tPLZ, tPZL (output on B-side) 6.0V tPHZ, tPZH (output on B-side) GND Prop Delay Open RT 10pF CL VDD VIN VOUT 200-ohm 200-ohm 6.0V Pulse Generator D.U.T PERICOM CONFIDENTIAL PENDING APPROVAL

2:1 Mux/DeMux Gigabit Ethenet LAN Switch with Power-down Mode Voltage Waveforms Propagation Delay Times Switching Waveforms Output Skew - tSK(o) Pulse Skew - tSK(p) Voltage Waveforms Enable and Disable Times Data In Data Out at Channel X Data Out at Channel Y tPLHX tPHLX 3.5V 2.5V 2.5V 2.5V I tSK(o) = I tPLHy – tPLHx I or I tPHLy – tPHLx I tSK(o) tPLHy tPHLy VOH VOL VOL VOH 1.5V Input Output tPLH tSK(p) = I tPHL – tPLH I tPHL 3.5V 2.5V 2.5V VOL VOH 1.5V tPLZ 1.25V 1.25V 2.5V VOH VOL VDD/2 VDD/2 tPHZ tPZL tPZH Output Output VOL +0.3V VOH –0.3V VOL VOH SEL Applications Information Logic Inputs The logic control inputs can be driven up to +3.6V regardless of the supply voltage. For example, given a +3.3V supply, the output enables or select pins may be driven low to 0V and high to 3.6V . Driving IN Rail-to-Rail® minimizes power consumption. Power-Supply Sequencing Proper power-supply sequencing is advised for all CMOS devices. It is recommended to always apply VDD before applying signals to the input/output or control pins. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd Input tPLH 2.5V 2.5V 2.5V 2.5V tPHL 3.5V 1.5V Output VOH VOL Notes: W aveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. All input impulses are supplied by generators having the following characteristics: PRR ≤ MHz, ZO = 50-Ohm, tR ≤ 2.5ns, tF ≤ 2.5ns. PERICOM CONFIDENTIAL PENDING APPROVAL

2:1 Mux/DeMux Gigabit Ethenet LAN Switch with Power-down Mode Packaging Mechanical: 56-Contact TQFN (ZF) DESCRIPTION: 56-contact, Thin Fine Pitch Quad Flat No-lead (TQFN) PACKAGE CODE: ZF56 DOCUMENT CONTROL #: PD-2024 REVISION: C DATE: 05/15/08 08-0208 PERICOM CONFIDENTIAL PENDING APPROVAL

2:1 Mux/DeMux Gigabit Ethenet LAN Switch with Power-down Mode Packaging Mechanical: 42-Contact TQFN (ZH) DATE: 11/14/12 DESCRIPTION: 42-contact Thin Fine Pitch Quad Flat No-Lead (TQFN) PACKAGE CODE: ZH42 DOCUMENT CONTROL #: PD-2035 REVISION:D Notes: 1. All dimensions are in millimeters. Angles in degrees. 2. Coplanarity applies to the exposed pad as well as the terminals. 3. Refer JEDEC MO-220. 4. Recommended land pattern is for reference only. 5. Thermal pad soldering area 12-0529 PERICOM CONFIDENTIAL PENDING APPROVAL

2:1 Mux/DeMux Gigabit Ethenet LAN Switch with Power-down Mode Pericom Semiconductor Corporation • 1-800-435-2336 • www .pericom.com Notes: Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Add 'X' for Tape and Reel

Ordering Information

Ordering Number Package Code Package Description PI3L720ZFE ZF Pb-free & Green, 56-contact TQFN PI3L720ZHE ZH Pb-free & Green, 42-contact TQFN (0.5mm pitch) PI3L720ZLE ZL Pb-free & Green, 42-contact TQFN (0.4mm pitch) Packaging Mechanical: 42-Contact TQFN (ZL) : 42-Lead, Thin Fine Pitch Quad Flat No-Lead (TQFN)N O I T P I R C S E D : E D O C E G A K C A P 2082 - D P : # L O R T N O C T N E M U C O D ZL42 DATE: 01/29/09 REVISION: A 09-0071 PERICOM CONFIDENTIAL PENDING APPROVAL