DS91D176 NSC | Alldatasheet
Document overview
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Technical content
Features
n Meets TIA/EIA-899 M-LVDS Standard n Capable of driving 32 LVDS loads n Controlled Edge Rates Tolerant to Stubs n Wide Common Mode for Increased Noise Immunity n DS91C176 has type 2 Fail-safe support n Up to 200 Mbps operation n Industrial temperature range n Single 3.3V supply n 8-lead SOIC package Typical Application in AdvancedTCA Clock Distribution 20024630 April 2006 DS91D176/DS91C176 Multipoint-LVDS (M-LVDS) Transceivers © 2006 National Semiconductor Corporation DS200246 www.national.com
Connection and Logic Diagram 20024601 Top View Order Number DS91D176TMA, DS91C176TMA See NS Package Number M08A
Ordering Information
Order Number Function Package Type DS91D176TMA Data (0V threshold receiver) SOIC/M08A DS91C176TMA Control (offset fail-safe receiver) SOIC/M08A DS91D176/DS91C176 www.national.com 2
Electrical Characteristics (Continued) Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 2, 3, 4, 8) Symbol Parameter Conditions Min Typ Max Units M-LVDS Bus (Input and Output) Pins I A Transceiver input/output current V A = 3.8V, VB = 1.2V 32 µA VA = 0V or 2.4V, V B = 1.2V −20 +20 µA VA = −1.4V, V B = 1.2V −32 µA IB Transceiver input/output current V B = 3.8V, VA = 1.2V 32 µA VB = 0V or 2.4V, V A = 1.2V −20 +20 µA VB = −1.4V, V A = 1.2V −32 µA IAB Transceiver input/output differential current (IA −I B) VA =V B, −1.4V ≤ V ≤ 3.8V −4 +4 µA IA(OFF) Transceiver input/output power-off current V A = 3.8V, VB = 1.2V, D E=V CC = 1.5V 32 µA VA = 0V or 2.4V, V B = 1.2V, D E=V CC = 1.5V −20 +20 µA VA = −1.4V, V B = 1.2V, D E=V CC = 1.5V −32 µA IB(OFF) Transceiver input/output power-off current V B = 3.8V, VA = 1.2V, D E=V CC = 1.5V 32 µA VB = 0V or 2.4V, V A = 1.2V, D E=V CC = 1.5V −20 +20 µA VB = −1.4V, V A = 1.2V, D E=V CC = 1.5V −32 µA IAB(OFF) Transceiver input/output power-off differential current (IA(OFF) −I B(OFF)) VA =V B, −1.4V ≤ V ≤ 3.8V, VCC = 1.5V, DE = 1.5V −4 +4 µA CA Transceiver input/output capacitance V CC = OPEN 9 pF CB Transceiver input/output capacitance 9 pF CAB Transceiver input/output differential capacitance 5.7 pF CA/B Transceiver input/output capacitance balance (CA/CB) 1.0 SUPPLY CURRENT (VCC) ICCD Driver Supply Current R L =5 0Ω,D E=V CC,R E=V CC 20 29.5 mA ICCZ TRI-STATE Supply Current DE = GND, RE = V CC 6 9.0 mA ICCR Receiver Supply Current DE = GND, RE = GND 14 18.5 mA DS91D176/DS91C176 www.national.com 4
Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 3, 8) Symbol Parameter Conditions Min Typ Max Units DRIVER AC SPECIFICATION t PLH Differential Propagation Delay Low to High R L =5 0Ω,C L = 5 pF, 1.3 3.4 5.5 ns tPHL Differential Propagation Delay High to Low C D = 0.5 pF 1.3 3.1 5.5 ns tSKD1 (tsk(p)) Pulse Skew |t PLHD −t PHLD| (Notes 5, 9) Figure 6and Figure 7 300 420 ps tSKD3 Part-to-Part Skew (Notes 6, 9) 2.2 ps 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) R L =5 0Ω,C L = 5 pF, 8 ns tPZL Enable Time (Z to Active Low ) C D = 0.5 pF 8 ns tPLZ Disable Time (Active Low to Z) Figure 8and Figure 9 8n s tPHZ Disable Time (Active High to Z) 8 ns tJIT Random Jitter, RJ (Note 9) 100 MHz Clock Pattern (Note 7) 2.5 5.5 psrms fMAX Maximum Data Rate 200 Mbps RECEIVER AC SPECIFICATION t PLH Propagation Delay Low to High C L = 15 pF 2.0 4.7 8.5 ns tPHL Propagation Delay High to Low Figures 10, 11and Figure 12 2.0 5.3 8.5 ns tSKD1 (tsk(p)) Pulse Skew |t PLHD −t PHLD| (Notes 5, 9) 0.6 1.7 ns tSKD3 Part-to-Part Skew (Notes 6, 9) 3.3 ns tTLH (tr) Rise Time (Note 9) 0.5 1.2 2.5 ns tTHL (tf) Fall Time (Note 9) 0.5 1.2 2.5 ns tPZH Enable Time (Z to Active High) R L = 500Ω,C L =1 5p F 1 0 n s tPZL Enable Time (Z to Active Low) Figure 13and Figure 14 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 V CC = 3.3V and T A = 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 −t PHLD|, 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 V CC 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 C D includes probe capacitance. Note 9: Not production tested. Guaranteed by a statistical analysis on a sample basis at the time of characterization. DS91D176/DS91C176 www.national.com5
FIGURE 14. Receiver TRI-STATE Delay Waveforms
DS91D176/DS91C176 Transmitting Inputs Outputs RE DE D B A X 2.0V 2.0V L H X 2.0V 0.8V H L X 0.8V X Z Z X — Don’t care condition Z — High impedance state DS91D176 Receiving Inputs Output RE DE A − B R 0.8V 0.8V ≥ +0.05V H 0.8V 0.8V ≤ −0.05V L 0.8V 0.8V 0V X 2.0V 0.8V X Z X — Don’t care condition Z — High impedance state DS91C176 Receiving Inputs Output RE DE A − B R 0.8V 0.8V ≥ +0.15V H 0.8V 0.8V ≤ +0.05V L 0.8V 0.8V 0V L 2.0V 0.8V X Z X — Don’t care condition Z — High impedance state DS91D176 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) DS91C176 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) DS91D176/DS91C176 www.national.com11
Pin No. Name Description
1 R Receiver output pin
Receiver enable pin: When RE is high, the receiver is disabled. When RE is low or open, the receiver is enabled. 3 DE Driver enable pin: When DE is low, the driver is disabled. When DE is high, the driver is enabled.
4 D Driver input pin
5 GND Ground pin
6 A Non-inverting driver output pin/Non-inverting receiver input pin
7 B Inverting driver output pin/Inverting receiver input pin
CC Power supply pin, +3.3V ± 0.3V
Application Information
Stub lengths should be kept to a minimum. For a general approximation, if the electrical length of a trace is greater than 1/5 of the transition edge, then the trace is considered a transmission line. If the velocity equals 160 ps per inch for a typical loaded backplane, then the maximum stub length is 312 ps/160 ps/inch or 1.95 inches (approximately 2 inches). To determine the maximum stub for your backplane, the propagation velocity for the backplane is required (refer to application notes AN-905 and AN-808). Typical Performance Characteristics Supply Current vs. Frequency Output VOD vs. Load Resistance 20024662 Supply Current measured using a clock pattern with driver terminated to 50ohms . VCC = 3.3V, TA = +25˚C. 20024663 VCC = 3.3V, TA = +25˚C FIGURE 15. SOIC performance Characteristics
Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS91D176TMA, DS91C176TMA See NS package Number M08A National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. For the most current product information visit us at www.national.com. LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. Leadfree products are RoHS compliant. National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: ap.support@nsc.com National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560 www.national.com DS91D176/DS91C176 Multipoint-LVDS (M-LVDS) Transceivers