DS75107

DS75107 NSC | Alldatasheet

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Technical content

Features

n Diode protected input stage for power “OFF” condition n 17 ns typ high speed n TTL compatible n ±10 mV or±25 mV input sensitivity n ±3V input common-mode range n High input impedance with normal VCC ,o rVCC = 0V n Strobes for channel selection n Dual circuits n Sensitivity gntd. over full common-mode range n Logic input clamp diodes — meets both “A” and “B” version specifications n ±5V standard supply voltages Connection Diagram Selection Guide Temperature→ 0˚C ≤ TA ≤ +70˚C Package → Cavity or Molded Dip Input Sensitivity→ ±25 mV ±10 mV Output Logic↓ TTL Active Pull-Up DS75107 TTL Open Collector Dual-In-Line Package DS009446-1 Top View Order Number DS75107M, DS75107N See NS Package Number M14A or N14A For Complete Military 883 Specifications, see RETS Datasheet. Order Number DS55107AJ/883 See NS Package Number J14A May 1999 DS75107 Dual Line Receiver © 1999 National Semiconductor Corporation DS009446 www.national.com

Absolute Maximum Ratings(Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage, V CC +7 V Supply Voltage, VCC − −7V Differential Input Voltage ±6V Common Mode Input Voltage ±5V Strobe Input Voltage 5.5V Storage Temperature Range −65˚C to +150˚C Maximum Power Dissipation (Note 1) at 25˚C Cavity Package 1308 mW Molded Package 1207 mW Lead Temperature (Soldering, 4 sec) 260˚C Note:Derate cavity package 8.7 mW/˚C above 25˚C; derate molded package 9.7 mW/˚C above 25˚C. Operating Conditions DS75107 Min Nom Max Supply Voltage VCC + 4.75V 5V 5.25V Supply Voltage VCC − −4.75V −5V −5.25V Operating Temperature Range 0˚C to +70˚C DS75107

Electrical Characteristics

TMIN ≤ TA ≤ TMAX (Notes 2, 3) Symbol Parameter Conditions Min Typ Max Units IIH High Level Input Current V CC+ = Max, VCC− = Max, 30 75 µAinto A1, B1, A2 or B2 V ID = 0.5V, VIC = −3V to 3V IIL Low Level Input Current V CC+ = Max, VCC− = Max, −10 µAinto A1, B1, A2 or B2 V ID = −2V, VIC = −3V to 3V IIH High Level Input Current V CC+ = Max, V IH(S)= 2.4V 40 µA into G1 or G2 V CC− = Max V IH(S)Max VCC+ 1m A IIL Low Level Input Current V CC+ = Max, VCC− = Max, −1.6 mAinto G1 or G2 V IL(S)= 0.4V IIH High Level Input Current into S VCC+ = Max, V IH(S)= 2.4V 80 µA VCC− = Max V IH(S)= Max VCC+ 2m A IIL Low Level Input Current into S VCC+ = Max, VCC− = Max, −3.2 mAVIL(S)= 0.4V VOH High Level Output Voltage V CC+ = Min, VCC− = Min, ILOAD = −400 µA, VID = 25 mV, 2.4 V VIC = −3V to 3V, (Note 3) VOL Low Level Output Voltage V CC+ = Min, VCC− = Min, ISINK = 16 mA, VID = −25 mV, 0.4 V VIC = −3V to 3V IOH High Level Output Current V CC+ = Min, VCC− = Min 250 µAVOH = Max VCC+ IOS Short Circuit Output Current V CC+ = Max, VCC− = Max, −18 −70 mA(Notes 3, 5) ICCH+ High Logic Level Supply V CC+ = Max, VCC− = Max, 18 30 mACurrent from VCC VID = 25 mV, TA = 25˚C ICCH− High Logic Level Supply V CC+ = Max, VCC− = Max, −8.4 −15 mACurrent from VCC VID = 25 mV, TA = 25˚C VI Input Clamp Voltage on G or S VCC+ = Min, VCC− = Min, −1 −1.5 VIIN = −12 mA, TA = 25˚C www.national.com 2

VCC+ = 5V, VCC− = −5V, TA = 25˚C Symbol Parameter Conditions Min Typ Max Units tPLH(D) Propagation Delay Time, Low to High Level, from Differential Inputs A and B to Output R L = 390Ω ,C L = 50 pF, (Note 4) 17 25 ns 19 25 ns tPHL(D) Propagation Delay Time, High to Low Level, from Differential Inputs A and B to Output R L = 390Ω ,C L = 50 pF, (Note 4) 17 25 ns 19 25 ns tPLH(S) Propagation Delay Time, Low to High Level, from Strobe Input G or S to Output R L = 390Ω ,C L = 50 pF 10 15 ns 13 20 ns tPHL(S) Propagation Delay Time, High to Low Level, from Strobe Input G or S to Output R L = 390Ω ,C L = 50 pF 8 15 ns 13 20 ns Switching Characteristics VCC+ = 5V, VCC− = −5V, TA = 25˚C Symbol Parameter Conditions Min Typ Max Units tPLH(D) Propagation Delay Time, Low-to- R L = 470Ω ,C L = 15 pF, (Note 6) High Level, from Differential 35 ns Inputs A and B to Output tPHL(D) Propagation Delay Time, High-to- R L = 470Ω ,C L = 15 pF, (Note 6) Low Level, from Differential 20 ns Inputs A and B to Output tPLH(S) Propagation Delay Time, Low-to- R L = 470Ω ,C L = 15 pF High Level, from Strobe Input G 17 ns or S to Output t PHL(S) Propagation Delay Time, High-to- R L = 470Ω ,C L = 15 pF Low Level, from Strobe Input G 17 ns or S to Output Note 1:“Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. Except for “Operating Temperature Range” they are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device operation. Note 2:Unless otherwise specified min/max limits apply across the 0˚C to +70˚C range for the DS75107. All typical values are for TA = 25˚C and VCC = 5V. Note 3:All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown as max or min on absolute value basis. Note 4:Differential input is +100 mV to −100 mV pulse. Delays read from 0 mV on input to 1.5V on output. Note 5:Only one output at a time should be shorted. Note 6:Differential input is +10 mV to −30 mV pulse. Delays read from 0 mV on input to 1.5V on output. Voltage Waveforms DS009446-12 www.national.com3

The DS75107 dual line circuit is designed specifically for use in high speed data transmission systems that utilize bal- anced, terminated transmission lines such as twisted-pair lines. The system operates in the balanced mode, so that noise induced on one line is also induced on the other. The noise appears common mode at the receiver input terminals where it is rejected. The ground connection between the line driver and receiver is not part of the signal circuit so that sys- tem performance is not affected by circulating ground cur- rents. The unique driver output circuit allows terminated transmis- sion lines to be driven at normal line impedances. High speed system operation is ensured since line reflections are virtually eliminated when terminated lines are used. Cross-talk is minimized by low signal amplitudes and low line impedances. The typical data delay in a system is approximately (30 + 1.3L) ns, where L is the distance in feet separating the driver and receiver. This delay includes one gate delay in both the driver and receiver. Data is impressed on the balanced-line system by unbalanc- ing the line voltages with the driver output current. The driven line is selected by appropriate driver input logic levels. The voltage difference is approximately: V DIFF ≅ 1⁄2 IO(on) xR T: (1) High series line resistance will cause degradation of the sig- nal. The receivers, however, will detect signals as low as 25 mV(or less). For normal line resistances, data may be re- covered from lines of several thousand feet in length. Line termination resistors (R T) are required only at the ex- treme ends of the line. For short lines, termination resistors at the receiver only may prove adequate. The signal ampli- tude will then be approximately: V DIFF ≅ IO(on) xR T: (2) Data-Bus or Party-Line System DS009446-2 Data-Bus or Party-Line System DS009446-3 www.national.com 4

Typical Applications(Continued) The strobe feature of the receiver and the inhibit feature of the driver allows the DS75107 dual line circuit to be used in data-bus or party-line systems. In these applications, several drivers and receivers may share a common transmission line. An enabled driver transmits data to all enabled receiv- ers on the line while other drivers and receivers are disabled. Data is thus time multiplexed on the transmission line. DS75107 device specifications allow widely varying thermal and electrical environments at the various driver and re- ceiver locations. The data-bus system offers maximum per- formance at minimum cost. The DS75107 dual line circuits may also be used in unbal- anced or single line systems. Although these systems do not offer the same performance as balanced systems for long lines, they are adequate for very short lines where environ- ment noise is not severe. The receiver threshold level is established by applying a DC reference voltage to one receiver input terminal. The signal from the transmission line is applied to the remaining input. The reference voltage should be optimized so that signal swing is symmetrical about it for maximum noise margin. The reference voltage should be in the range of −3.0V to +3.0V. It can be provided by a voltage supply or by a voltage divider from an available supply voltage. Precautions in the Use of DS1603, DS3603, DS55107, DS75107, DS75108 and DS75208 Dual Line Receivers The following precaution should be observed when using or testing DS75107 line circuits. When only one receiver in a package is being used, at least one of the differential inputs of the unused receiver should be terminated at some voltage between −3.0V and +3.0V, preferably at ground. Failure to do so will cause improper op- eration of the unit being used because of common bias cir- cuitry for the current sources of the two receivers. The DS75107 line receiver features a common mode input voltage range of ±3.0V. This satisfies the requirements for all but the noisiest system applications. For these severe noise environments, the common mode range can be extended by the use of external input attenuators. Common mode input voltages can in this way be reduced to ±3.0V at the receiver input terminals. Differential data signals will be reduced pro- portionately. Input sensitivity, input impedance and delay times will be adversely affected. Circuit Differences Between “A” and Standard Devices The difference between the “A” and standard devices is shown in the following schematics of the input stage. Unbalanced or Single-Line Systems DS009446-4 Increasing Common Mode Input Voltage Range of Receiver DS009446-5 DS75108 Wired-OR Output Connections DS009446-6 “A” Devices DS009446-7 www.national.com5

Typical Applications(Continued) The input protection diodes are useful in certain party-line systems which may have multiple V+ power supplies and, in which case, may be operated with some of the V+ supplies turned off. In such a system, if a supply is turned off and al- lowed to go to ground, the equivalent input circuit connected to that supply would be as follows: This would be a problem in specific systems which might possibly have the transmission lines biased to some poten- tial greater than 1.4V. Since this is not a widespread applica- tion problem, both the “A” and standard devices will be avail- able. The ratings and characteristic specifications of the “A” devices are the same as those of the standard devices. Standard Devices DS009446-8 “A” Devices DS009446-9 Standard Devices DS009446-10 www.national.com 6

DS55107/DS75107, DS75108, DS75208 DS009446-11 1⁄2 of the dual circuit is shown. *Indicates connections common to second half of dual circuit. Components shown with dash lines are applicable to the DS55107, DS75207 and DS75107 only. www.national.com7

Physical Dimensionsinches (millimeters) unless otherwise noted Ceramic Dual-In-Line Package (J) Order Number DS75107J Molded Dual-In-Line Package (M) Order Number DS75107M, DS75107AM www.national.com 8

Physical Dimensionsinches (millimeters) unless otherwise noted (Continued) 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. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 www.national.com Molded Dual-In-Line Package (N) Order Number DS75107N, DS75107AN DS75107 Dual Line Receiver 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.