DS55107

DS55107 NSC | Alldatasheet

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Y Diode protected input stage for power ‘‘OFF’’ condition Y 17 ns typ high speed Y TTL compatible Y g10 mV or g25 mV input sensitivity Y g3V input common-mode range Y High input impedance with normal V CC,o rV CC e 0V Y Strobes for channel selection Y Dual circuits Y Sensitivity gntd. over full common-mode range Y Logic input clamp diodesÐmeets both ‘‘A’’ and ‘‘B’’ version specifications Y g5V standard supply voltages Connection Diagram Dual-In-Line Package TL/F/9446–1 Top View Order Number DS75107M, DS75107N, DS75107AM, DS75107AN, DS75108M, DS75108N or DS75208N See NS Package Number M14A or N14A For Complete Military 883 Specifications, see RETS Datasheet. Order Number DS55107AJ/883 See NS Package Number J14A Selection Guide Temperaturex b55§C s TA s a125§C0 §C s TA s a70§C Packagex Cavity Dip Cavity or Molded Dip Input Sensitivity x g25 mV g25 mV g10 mV Output Logic v TTL Active Pull-Up DS55107 DS75107 TTL Open Collector DS75108 DS75208

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 CCa 7V Supply Voltage, V CCb b7V Differential Input Voltage g6V Common Mode Input Voltage g5V Strobe Input Voltage 5.5V Storage Temperature Range b65§Ct o a150§C Maximum Power Dissipation * at 25 §C Cavity Package 1308 mW Molded Package 1207 mW Lead Temperature (Soldering, 4 sec) 260 *Derate cavity package 8.7 mW/ §C above 25 §C; derate molded package 9.7 mW/§C above 25 §C. Operating Conditions DS55107 DS75107, DS75108, DS75208 Min Nom Max Min Nom Max Supply Voltage V CCa 4.5V 5V 5.5V 4.75V 5V 5.25V Supply Voltage V CCb b4.5V b5V b5.5V b4.75V b5V b5.25V Operating Temperature Range b55§Ct o a125§C0 §Ct o a70§C 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 b55§Ct o a125§C temperature range for the DS55107 and across the 0 §Ct o a70§C range for the DS75107, DS75108 and DS75208. All typical values are for T A e 25§C and V CC e 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. DS55107/DS75107, DS75108 Electrical Characteristics TMIN s TA s TMAX (Notes 2, 3) Symbol Parameter Conditions Min Typ Max Units IIH High Level Input Current V CCa e Max, V CCb e Max, 30 75 mAinto A1, B1, A2 or B2 V ID e 0.5V, V IC eb 3V to 3V IIL Low Level Input Current V CCa e Max, V CCb e Max, b10 mAinto A1, B1, A2 or B2 V ID eb 2V, V IC eb 3V to 3V IIH High Level Input Current V CCa e Max, V IH(S) e 2.4V 40 mA into G1 or G2 V CCb e Max VIH(S) Max V CCa 1m A IIL Low Level Input Current V CCa e Max, V CCb e Max, b1.6 mAinto G1 or G2 V IL(S) e 0.4V IIH High Level Input Current into S V CCa e Max, V IH(S) e 2.4V 80 mA VCCb e Max VIH(S) e Max V CCa 2m A IIL Low Level Input Current into S V CCa e Max, V CCb e Max, b3.2 mAVIL(S) e 0.4V VOH High Level Output Voltage V CCa e Min, V CCb e Min, ILOAD eb 400 mA, V ID e 25 mV, 2.4 V VIC eb 3V to 3V, (Note 3) VOL Low Level Output Voltage V CCa e Min, V CCb e Min, ISINK e 16 mA, V ID eb 25 mV, 0.4 V VIC eb 3V to 3V IOH High Level Output Current V CCa e Min, V CCb e Min 250 mAVOH e Max V CCa, (Note 4) IOS Short Circuit Output Current V CCa e Max, V CCb e Max, b18 b70 mA(Notes 2 and 3) ICCHa High Logic Level Supply V CCa e Max, V CCb e Max, 18 30 mACurrent from V CC VID e 25 mV, T A e 25§C ICCHb High Logic Level Supply V CCa e Max, V CCb e Max, b8.4 b15 mACurrent from V CC VID e 25 mV, T A e 25§C VI Input Clamp Voltage on G or S V CCa e Min, V CCb e Min, b1 b1.5 VIIN eb 12 mA, T A e 25§C http:/ /www.national.com 2

Switching Characteristics VCCa e 5V, V CCb eb 5V, T A e 25§C Symbol Parameter Conditions Min Typ Max Units tPLH(D) Propagation Delay Time, Low to R L e 390X,C L e 50 pF, (Note 3) 17 25 ns High Level, from Differential (Note 1) (Note 4) 19 25 nsInputs A and B to Output tPHL(D) Propagation Delay Time, High to R L e 390X,C L e 50 pF, (Note 3) 17 25 ns Low Level, from Differential (Note 1) (Note 4) 19 25 nsInputs A and B to Output tPLH(S) Propagation Delay Time, Low to R L e 390X,C L e 50 pF (Note 3) 10 15 ns High Level, from Strobe Input G (Note 4) 13 20 nsor S to Output tPHL(S) Propagation Delay Time, High to R L e 390X,C L e 50 pF (Note 3) 8 15 ns Low Level, from Strobe Input G (Note 4) 13 20 nsor S to Output Note 1: Differential input is a100 mV to b100 mV pulse. Delays read from 0 mV on input to 1.5V on output. Note 2: Only one output at a time should be shorted. Note 3: DS55107/DS75107 only. Note 4: DS75108 only. DS75208 Electrical Characteristics 0§C s TA s a70§C Symbol Parameter Conditions Min Typ Max Units IIH High Level Input Current V CCa e Max, V CCb e Max, 30 75 mAinto A1, B1, A2 or B2 V ID e 0.5V, V IC eb 3V to 3V IIL Low Level Input Current V CCa e Max, V CCb e Max, b10 mAinto A1, B1, A2 or B2 V ID eb 2V, V IC eb 3V to 3V IIH High Level Input Current V CCa e Max, V IH(S) e 2.4V 40 mA into G1 or G2 V CCb e Max VIH(S) e Max V CCa 1m A IIL Low Level Input Current V CCa e Max, V CCb e Max, b1.6 mAinto G1 or G2 V IL(S) e 0.4V IIH High Level Input Current into S V CCa e Max, V IH(S) e 2.4V 80 mA VCCb e Max VIH(S) e Max V CCa 2m A IIL Low Level Input Current into S V CCa e Max, V CCb e Max, b3.2 mAVIL(S) e 0.4V VOL Low Level Output Voltage V CCa e Min, V CCb e Min, ISINK e 16 mA, V ID eb 10 mV, 0.4 V VIC eb 3V to 3V IOH High Level Output Current V CCa e Min, V CCb e Min, 250 mAVOH e Max V CCa ICCHa High Logic Level Supply V CCa e Max, V CCb e Max, 18 30 mACurrent from V CCa VID e 10 mV, T A e 25§C ICCHb High Logic Level Supply V CCa e Max, V CCb e Max, b8.4 b15 mACurrent from V CCb VID e 10 mV, T A e 25§C VI Input Clamp Voltage on G or S V CCa e Min, V CCb e Min, b1 b1.5 VIIN eb 12 mA, T A e 25§C http:/ /www.national.com3

Switching Characteristics VCCa e 5V, V CCb eb 5V, T A e 25§C Symbol Parameter Conditions Min Typ Max Units tPLH(D) Propagation Delay Time, Low-to- R L e 470X,C L e 15 pF, (Note 1) High Level, from Differential 35 ns Inputs A and B to Output tPHL(D) Propagation Delay Time, High-to- R L e 470X,C L e 15 pF, (Note 1) Low Level, from Differential 20 ns Inputs A and B to Output tPLH(S) Propagation Delay Time, Low-to- R L e 470X,C L e 15 pF High Level, from Strobe Input G 17 ns or S to Output tPHL(S) Propagation Delay Time, High-to- R L e 470X,C L e 15 pF Low Level, from Strobe Input G 17 ns or S to Output Note 1: Differential input is a10 mV to b30 mV pulse. Delays read from 0 mV on input to 1.5V on output. Voltage Waveforms TL/F/9446–12 Typical Applications Basic Balanced-Line Transmission System TL/F/9446–2 http:/ /www.national.com 4

Typical Applications (Continued) Data-Bus or Party-Line System TL/F/9446–3 APPLICATION The DS55107, DS75107 dual line circuits are designed spe- cifically for use in high speed data transmission systems that utilize balanced, 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 system performance is not affected by circu- lating ground currents. 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 im- pedances. The typical data delay in a system is approximately (30 a 1.3L) ns, where L is the distance in feet separating the driv- er 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 driv- en line is selected by appropriate driver input logic levels. The voltage difference is approximately: V DIFF j (/2 IO(on) c RT (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 recovered 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 j IO(on) c RT (2) The strobe feature of the receivers and the inhibit feature of the drivers allow the DS55107, DS75107 dual line circuits to be used in data-bus or party-line systems. In these applica- tions, several drivers and receivers may share a common transmission line. An enabled driver transmits data to all enabled receivers on the line while other drivers and receiv- ers are disabled. Data is thus time multiplexed on the trans- mission line. The DS55107, DS75107 device specifications allow widely varying thermal and electrical environments at the various driver and receiver locations. The data-bus sys- tem offers maximum performance at minimum cost. The DS55107, DS75107 dual line circuits may also be used in unbalanced or single line systems. Although these sys- tems do not offer the same performance as balanced sys- tems for long lines, they are adequate for very short lines where environment 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 http:/ /www.national.com5

Typical Applications (Continued) swing is symmetrical about it for maximum noise margin. The reference voltage should be in the range of b3.0V to a3.0V. It can be provided by a voltage supply or by a volt- age divider from an available supply voltage. Unbalanced or Single-Line Systems TL/F/9446–4 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 DS55107, 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 b3.0V and a3.0V, preferably at ground. Failure to do so will cause improper operation of the unit being used because of common bias circuitry for the current sources of the two receivers. The DS55107, DS75107 and DS75108 line receivers fea- ture a common mode input voltage range of g3.0V. This satisfies the requirements for all but the noisiest system ap- plications. For these severe noise environments, the com- mon mode range can be extended by the use of external input attenuators. Common mode input voltages can in this way be reduced to g3.0V at the receiver input terminals. Differential data signals will be reduced proportionately. In- put sensitivity, input impedance and delay times will be ad- versely affected. The DS75108 line receivers feature an open-collector-out- put circuit that can be connected in the DOT-OR logic con- figuration with other DS75108 outputs. This allows a level of logic to be implemented without addtional logic delay. Increasing Common Mode Input Voltage Range of Receiver TL/F/9446–5 DS75108 Wired-OR Output Connections TL/F/9446–6 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. ‘‘A’’ Devices TL/F/9446–7 Standard Devices TL/F/9446–8 http:/ /www.national.com 6

Typical Applications (Continued) The input protection diodes are useful in certain party-line systems which may have multiple V a power supplies and, in which case, may be operated with some of the V a sup- plies turned off. In such a system, if a supply is turned off and allowed to go to ground, the equivalent input circuit connected to that supply would be as follows: ‘‘A’’ Devices TL/F/9446–9 Standard Devices TL/F/9446–10 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 appli- cation problem, both the ‘‘A’’ and standard devices will be available. The ratings and characteristic specifications of the ‘‘A’’ devices are the same as those of the standard devices. The DS55107A feature the ‘‘A’’ device input stage. Schematic Diagrams DS55107/DS75107, DS75108, DS75208 TL/F/9446–11 Note 1: (/2 of the dual circuit is shown. Note 2: *Indicates connections common to second half of dual circuit. Note 3: Components shown with dash lines are applicable to the DS55107, DS75207 and DS75107 only. http:/ /www.national.com7

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Physical Dimensions inches (millimeters) Ceramic Dual-In-Line Package (J) Order Number DS55107J, DS75107J or DS75208J Molded Dual-In-Line Package (M) Order Number DS75107M, DS75107AM or DS75108M http:/ /www.national.com9

DS55107/DS75107/DS75108/DS75208 Dual Line Receivers Physical Dimensions inches (millimeters) (Continued) Molded Dual-In-Line Package (N) Order Number DS75107N, DS75107AN, DS75108N or DS75208N 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 OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.

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