DS91C180_07 NSC | Alldatasheet
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Technical content
Features
■ DC to 100+ MHz / 200+ Mbps low power, low EMI operation ■ Optimal for ATCA, uTCA clock distribution networks ■ Meets or exceeds TIA/EIA-899 M-LVDS Standard ■ Wide Input Common Mode Voltage for Increased Noise Immunity ■ DS91D180 has type 1 receiver input ■ DS91C180 has type 2 receiver input for fail-safe functionality ■ Industrial temperature range ■ Space saving SOIC-14 package (JEDEC MS-012) Typical Application in an ATCA Clock Distribution Network 20041930 © 2007 National Semiconductor Corporation 200419 www.national.com DS91D180/DS91C180 100 MHz M-LVDS Line Driver/Receiver Pair
Order Number DS91D180TMA, DS91C180TMA See NS Package Number M14A Logic Diagram 20041925
Ordering Information
Order Number Receiver Input Function Package Type DS91D180TMA type 1 Data (0V threshold receiver) SOIC/M14A DS91C180TMA type 2 Control (offset fail-safe receiver) SOIC/M14A M-LVDS Receiver Types The EIA/TIA-899 M-LVDS standard specifies two different types of receiver input stages. A type 1 receiver has a con- ventional threshold that is centered at the midpoint of the input amplitude, VID/2. A type 2 receiver has a built in offset that is 100mV greater then VID/2. The type 2 receiver offset acts as a failsafe circuit where open or short circuits at the input will always result in the output stage being driven to a low logic state. 20041940 FIGURE 1. M-LVDS Receiver Input Thresholds
Symbol Parameter Conditions Min Typ Max Units M-LVDS Bus (Input and Output) Pins IA, IY Receiver input or driver high-impedance output current VA,Y = 3.8V, VB,Z = 1.2V, DE = GND 32 µA VA,Y = 0V or 2.4V, VB,Z = 1.2V, DE = GND −20 +20 µA VA,Y = −1.4V, VB,Z = 1.2V, DE = GND −32 µA IB, IZ Receiver input or driver high-impedance output current VB,Z = 3.8V, VA,Y = 1.2V, DE = GND 32 µA VB,Z = 0V or 2.4V, VA,Y = 1.2V, DE = GND −20 +20 µA VB,Z = −1.4V, VA,Y = 1.2V, DE = GND −32 µA IAB, IYZ Receiver input or driver high-impedance output differential current (IA − IB or IY − IZ) VA,Y = VB,Z, −1.4V ≤ V ≤ 3.8V, DE = GND −4 +4 µA IA(OFF), IY(OFF) Receiver input or driver high-impedance output power-off current VA,Y = 3.8V, VB,Z = 1.2V, DE = VCC = 1.5V 32 µA VA,Y = 0V or 2.4V, VB,Z = 1.2V, DE = VCC = 1.5V −20 +20 µA VA,Y = −1.4V, VB,Z = 1.2V, DE = VCC = 1.5V −32 µA IB(OFF), IZ(OFF) Receiver input or driver high-impedance output power-off current VB,Z = 3.8V, VA,Y = 1.2V, DE = VCC = 1.5V 32 µA VB,Z = 0V or 2.4V, VA,Y = 1.2V, DE = VCC = 1.5V −20 +20 µA VB,Z = −1.4V, VA,Y = 1.2V, DE = VCC = 1.5V −32 µA IAB(OFF), IYZ(OFF) Receiver input or driver high-impedance output power-off differential current (IA(OFF) − IB(OFF) or IY(OFF) − IZ(OFF)) VA,Y = VB,Z, −1.4V ≤ V ≤ 3.8V, VCC = 1.5V, DE = 1.5V −4 +4 µA CA, CB Receiver input capacitance VCC = OPEN 5.1 pF CY, CZ Driver output capacitance 8.5 pF CAB Receiver input differential capacitance 2.5 pF CYZ Driver output differential capacitance 5.5 pF CA/B, CY/Z Receiver input or driver output capacitance balance (CA/CB or CY/CZ) 1.0 SUPPLY CURRENT (VCC) ICCD Driver Supply Current RL = 50Ω, DE = VCC, RE = VCC 17 29.5 mA ICCZ TRI-STATE Supply Current DE = GND, RE = VCC 7 9.0 mA ICCR Receiver Supply Current DE = GND, RE = GND 14 18.5 mA ICCB Supply Current, Driver and Receiver Enabled DE = VCC, RE = GND 20 29.5 mA www.national.com 4 DS91D180/DS91C180
Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 3, 8) Symbol Parameter Conditions Min Typ Max Units DRIVER AC SPECIFICATION tPLH Differential Propagation Delay Low to High RL = 50Ω, CL = 5 pF, 1.0 3.4 5.5 ns tPHL Differential Propagation Delay High to Low CD = 0.5 pF 1.0 3.1 5.5 ns tSKD1 (tsk(p)) Pulse Skew |tPLHD − tPHLD| (Notes 5, 9) Figure 7 and Figure 8 300 420 ps tSKD3 Part-to-Part Skew (Notes 6, 9) 1.9 ns tTLH (tr) Rise Time (Note 9) 1.0 1.8 3.0 ns tTHL (tf) Fall Time (Note 9) 1.0 1.8 3.0 ns tPZH Enable Time (Z to Active High) RL = 50Ω, CL = 5 pF, 8 ns tPZL Enable Time (Z to Active Low ) CD = 0.5 pF 8 ns tPLZ Disable Time (Active Low to Z) Figure 9 and Figure 10 8 ns tPHZ Disable Time (Active High to Z) 8 ns tJIT Random Jitter, RJ (Note 9) 100MHz clock pattern (Note 7) 2.5 5.5 psrms fMAX Maximum Data Rate 200 Mbps RECEIVER AC SPECIFICATION tPLH Propagation Delay Low to High CL = 15 pF 2.0 4.7 7.5 ns tPHL Propagation Delay High to Low Figures 11, 12 and Figure 13 2.0 5.3 7.5 ns tSKD1 (tsk(p)) Pulse Skew |tPLHD − tPHLD| (Notes 5, 9) 0.6 1.9 ns tSKD3 Part-to-Part Skew (Notes 6, 9) 1.5 ns tTLH (tr) Rise Time (Note 9) 0.5 1.2 3.0 ns tTHL (tf) Fall Time (Note 9) 0.5 1.2 3.0 ns tPZH Enable Time (Z to Active High) RL = 500Ω, CL = 15 pF 10 ns tPZL Enable Time (Z to Active Low) Figure 14 and Figure 15 10 ns tPLZ Disable Time (Active Low to Z) 10 ns tPHZ Disable Time (Active High to Z) 10 ns fMAX Maximum Data Rate 200 Mbps Note 1: “Absolute Maximum Ratings” are those beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device should be operated at these limits. The tables of “Electrical Characteristics” provide conditions for actual device operation. Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. Note 3: All typicals are given for VCC = 3.3V and TA = 25°C. Note 4: The algebraic convention, in which the least positive (most negative) limit is designated as minimum, is used in this datasheet. Note 5: tSKD1, |tPLHD − tPHLD|, is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of the same channel. Note 6: tSKD3, Part-to-Part Skew, is defined as the difference between the minimum and maximum specified differential propagation delays. This specification applies to devices at the same VCC and within 5°C of each other within the operating temperature range. Note 7: Stimulus and fixture jitter has been subtracted. Note 8: CL includes fixture capacitance and CD includes probe capacitance. Note 9: Not production tested. Guaranteed by a statistical analysis on a sample basis at the time of characterization. 5 www.national.com DS91D180/DS91C180
FIGURE 15. Receiver TRI-STATE Delay Waveforms
DS91D180/DS91C180 Transmitting Inputs Outputs DE D Z Y 2.0V 2.0V L H 2.0V 0.8V H L 0.8V X Z Z X — Don't care condition Z — High impedance state DS91D180 Receiving Inputs Output RE A − B R 0.8V ≥ +0.05V H 0.8V ≤ −0.05V L 0.8V 0V X 2.0V X Z X — Don't care condition Z — High impedance state DS91C180 Receiving Inputs Output RE A − B R 0.8V ≥ +0.15V H 0.8V ≤ +0.05V L 0.8V 0V L 2.0V X Z X — Don't care condition Z — High impedance state DS91D180 Receiver Input Threshold Test Voltages Applied Voltages Resulting Differential Input Voltage Resulting Common-Mode Input Voltage Receiver Output VIA VIB VID VIC R 2.400V 0.000V 2.400V 1.200V H 0.000V 2.400V −2.400V 1.200V L 3.800V 3.750V 0.050V 3.775V H 3.750V 3.800V −0.050V 3.775V L −1.400V −1.350V −0.050V −1.375V H −1.350V −1.400V 0.050V −1.375V L H — High Level L — Low Level Output state assumes that the receiver is enabled (RE = L) DS91C180 Receiver Input Threshold Test Voltages Applied Voltages Resulting Differential Input Voltage Resulting Common-Mode Input Voltage Receiver Output VIA VIB VID VIC R 2.400V 0.000V 2.400V 1.200V H 0.000V 2.400V −2.400V 1.200V L 3.800V 3.650V 0.150V 3.725V H 3.800V 3.750V 0.050V 3.775V L −1.250V −1.400V 0.150V −1.325V H −1.350V −1.400V 0.050V −1.375V L H — High Level L — Low Level Output state assumes that the receiver is enabled (RE = L) 11 www.national.com DS91D180/DS91C180
Pin No. Name Description 1, 8 NC No connect.
2 R Receiver output pin
3 RE Receiver enable pin: When RE is high, the receiver is disabled. When RE is low or open, the receiver is enabled. 4 DE Driver enable pin: When DE is low, the driver is disabled. When DE is high, the driver is enabled.
5 D Driver input pin
6, 7 GND Ground pin
9 Y Non-inverting driver output pin
10 Z Inverting driver output pin
11 B Inverting receiver input pin
12 A Non-inverting receiver input pin
13, 14 VCC Power supply pin, +3.3V ± 0.3V www.national.com 12 DS91D180/DS91C180
Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS91D180TMA, DS91C180TMA See NS package Number M14A 13 www.national.com DS91D180/DS91C180
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