DS34C86T Quad CMOS Differential Line Receiver General Description Features The DS34C86T is a quad differential line receiver designed to meet the RS-422, RS-423, and Federal Standards 1020 and 1030 for balanced and unbalanced digital data transmission, while retaining the low power characteristics of CMOS. The DS34C86T has an input sensitivity of 200 mV over the common mode input voltage range of ± 7V. Hysteresis is provided to improve noise margin and discourage output instability for slowly changing input waveforms. The DS34C86T features internal pull-up and pull-down resistors which prevent output oscillation on unused channels. Separate enable pins allow independent control of receiver pairs. The TRI-STATE ® outputs have 6 mA source and sink capability. The DS34C86T is pin compatible with the DS3486. n CMOS design for low power n ± 0.2V sensitivity over the input common mode voltage range n Typical propagation delays: 19 ns n Typical input hysteresis: 60 mV n Inputs won’t load line when VCC = 0V n Meets the requirements of EIA standard RS-422 n TRI-STATE outputs for system bus compatibility n Available in surface mount n Open input Failsafe feature, output high for open input Logic Diagram DS008699-1 Connection Diagram Truth Table Dual-In-Line Package Enable Input L X Output Z H VID ≥ VTH (Max) H H VID ≤ VTH (Min) L H Open* H *Open, not terminated Z = TRI-STATE DS008699-2 Top View Order Number DS34C86TM, and DS34C86TN See NS Package Number M16A and N16E TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1998 National Semiconductor Corporation DS008699 www.national.com DS34C86T Quad CMOS Differential Line Receiver May 1998 Absolute Maximum Ratings (Notes 1, 2) Maximum Power Dissipation at 25˚C (Note 5) Plastic “N” Package 1645 mW SOIC Package 1190 mW ± 25 mA Current Per Output This device does not meet 2000V ESD rating. (Note 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) Input Common Mode Range (V CM) Differential Input Voltage (V DIFF) Enable Input Voltage (V IN) Storage Temperature Range (T STG) Lead Temperature (Soldering 4 sec) 7V Operating Conditions ± 14V ± 14V 7V −65˚C to +150˚C DC Electrical Characteristics Min 4.50 −40 Supply Voltage (VCC) Operating Temperature Range (TA) Enable Input Rise or Fall Times Max 5.50 +85 500 Unit V ˚C ns 260˚C (Note 3) VCC = 5V ± 10% (unless otherwise specified) Symbol VTH Parameter Minimum Differential Input Voltage RIN IIN Input Resistance Input Current (Under Test) VOH Minimum High Level Output Voltage VOL Maximum Low Level Output Voltage VIH Conditions VOUT = V OH or VOL −7V < VCM < +7V VIN = −7V, +7V (Other Input = GND) VIN = +10V, Other Input = GND VIN = −10V, Other Input = GND VCC = Min., V(DIFF) = +1V Min Typ Max Units −200 35 +200 mV 5.0 6.8 10 kΩ +1.1 +1.5 mA −2.0 −2.5 mA 3.8 4.2 IOUT = −6.0 mA VCC = Max., V(DIFF) = −1V IOUT = 6.0 mA Minimum Enable High V 0.2 0.3 2.0 V V Input Level Voltage VIL Maximum Enable Low 0.8 V ± 5.0 ± 1.0 µA 23 mA Input Level Voltage IOZ Maximum TRI-STATE Output Leakage Current II Maximum Enable Input VOUT = V CC or GND, TRI-STATE Control = VIL VIN = V CC or GND ± 0.5 µA Current ICC Quiescent Power VCC = Max., V(DIFF) = +1V 16 VCM = 0V 60 Supply Current VHYST Input Hysteresis mV AC Electrical Characteristics (Note 3) VCC = 5V ± 10% (unless otherwise specified) (Figures 1, 2, 3) Symbol tPLH, Propagation Delay tPHL Input to Output Conditions CL = 50 pF VDIFF = 2.5V tRISE, Output Rise and VCM = 0V CL = 50 pF tFALL Fall Times VDIFF = 2.5V tPLZ, Propagation Delay VCM = 0V CL = 50 pF tPHZ ENABLE to Output www.national.com Parameter RL = 1000Ω VDIFF = 2.5V 2 Min Typ Max Units 19 30 ns 4 9 ns 13 18 ns AC Electrical Characteristics (Note 3) (Continued) VCC = 5V ± 10% (unless otherwise specified) (Figures 1, 2, 3) Symbol Parameter tPZL, Propagation Delay tPZH ENABLE to Output Conditions CL = 50 pF RL = 1000Ω Min Typ Max Units 13 21 ns VDIFF = 2.5V Note 1: Absolute Maximum Ratings are those values 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 table of “Electrical Characteristics” provides conditions for actual device operation. Note 2: Unless otherwise specified, all voltages are referenced to ground. Note 3: Unless otherwise specified, Min/Max limits apply across the operating temperature range. All typicals are given for VCC = 5V and TA = 25˚C. Note 4: ESD Rating; HBM (1.5kΩ, 100 pF) Inputs ≥ 2000V All other pins ≥ 1000V EIAJ (0Ω, 200 pF) ≥ 350V Note 5: Ratings apply to ambient temperature at 25˚C. Above this temperature derate N Package 13.16 mW/˚C, and M Package 9.52 mW/˚C. Comparison Table of Switching Characteristics into “LS-Type” Load (Note 6) VCC = 5V, TA = 25˚C (Figures 4, 5) Symbol Parameter DS34C86 Typ tPHL(D) Propagation Delay Time DS3486 Max Typ Units Max 17 19 ns 19 19 ns Output High to Low tPLH(D) Propagation Delay Time Output Low to High tPLZ Output Low to TRI-STATE 13 23 ns tPHZ Output High to TRI-STATE 12 25 ns tPZH Output TRI-STATE to High 13 18 ns tPZL Output TRI-STATE to Low 13 20 ns Note 6: This Table is provided for comparison purposes only. The values in this table for the DS34C86 reflect the performance of the device but are not tested or guaranteed. Test and Switching Waveforms DS008699-3 FIGURE 1. Propagation Delays 3 www.national.com Test and Switching Waveforms (Continued) DS008699-4 CL Includes load and test jig capacitance. S1 = VCC for tPZL, and tPLZ measurements. S1 = GND for tPZH, and t PHZ measurements. FIGURE 2. Test Circuit for TRI-STATE Output Tests DS008699-5 FIGURE 3. TRI-STATE Output Enable and Disable Waveforms AC Test Circuits and Switching Time Waveforms DS008699-6 DS008699-7 Input Pulse Characteristics: tTLH = tTHL = 6 ns (10% to 90%) PRR = 1 MHz, 50% duty cycle FIGURE 4. Propagation Delay Differential Input to Output for “LS-Type” Load www.national.com 4 AC Test Circuits and Switching Time Waveforms (Continued) DS008699-8 1.5V for tPHZ and tPLZ −1.5V for tPLZ and tPZL Input Pulse Characteristics: tTLH = tTHL = 6 ns (10% to 90%) PRR = 1 MHz, 50% duty cycle tPLZ tPHZ DS008699-10 DS008699-9 tPZL tPZH DS008699-11 DS008699-12 FIGURE 5. Propagation Delay TRI-STATE Control Unit to Output for “LS-Type” Load 5 www.national.com 6 Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Molded Small Outline Package (M) Order Number DS34C86TM NS Package Number M16A 16-Lead Dual-In-Line Package (N) Order Number DS34C86TN NS Package Number N16E 7 www.national.com DS34C86T Quad CMOS Differential Line Receiver 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: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness. ure 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. 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