DS26F32M Quad Differential Line Receivers General Description Features The DS26F32 is a quad differential line receiver designed to meet the requirements of EIA Standards RS-422 and RS-423, and Federal Standards 1020 and 1030 for balanced and unbalanced digital data transmission. The DS26F32 offers improved performance due to the use of state-of-the-art L-FAST bipolar technology. The L-FAST technology allows for higher speeds and lower currents by utilizing extremely short gate delay times. Thus, the DS26F32 features lower power, extended temperature range, and improved specifications. The device features an input sensitivity of 200 mV over the input common mode range of ± 7.0V. The DS26F32 provides an enable function common to all four receivers and TRI-STATE ® outputs with 8.0 mA sink capability. Also, a fail-safe input/output relationship keeps the outputs high when the inputs are open. The DS26F32 offers optimum performance when used with the DS26F31 Quad Differential Line Driver. n Military temperature range n Input voltage range of ± 7.0V (differential or common mode) ± 0.2V sensitivity over the input voltage range n Meets all the requirements of EIA standards RS-422 and RS-423 n High input impedance (18k typical) n 30 mV input hysteresis n Operation from single +5.0V supply n Input pull-down resistor prevents output oscillation on unused channels n TRI-STATE outputs, with choice of complementary enables, for receiving directly onto a data bus n Propagation delay 15 ns typical Connection Diagrams 20-Lead Ceramic Leadless Chip Carrier 16-Lead DIP DS009615-7 Function Table (Each Receiver) DS009615-1 Top View See NS Package Number J16A For Complete Military Product Specifications, refer to the appropriate SMD or MDS. Order Number DS26F32ME/883, DS26F32MJ/883 or DS26F32MW/883 See NS Package Number E20A, J16A or W16A Differential Inputs VID = (V IN+) − (VIN−) E E OUT VID ≥ 0.2V H X H X L H H X L X L L L H Z VID ≤ −0.2V X Enables Outputs H = High Level L = Low Level X = Immaterial TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS009615 www.national.com DS26F32MQuad Differential Line Receivers May 1999 Absolute Maximum Ratings (Note 2) Cavity Package Supply Voltage Common Mode Voltage Range Differential Input Voltage Enable Voltage Output Sink Current If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Ceramic DIP −65˚C + to 175˚C Operating Temperature Range DS26F32M −55˚C to +125˚C DS26F32C 0˚C to +70˚C Lead Temperature Ceramic DIP (soldering, 60 sec) 300˚C Maximum Power Dissipation (Note 1) at 25˚C 1500 mW 7.0V ± 25V ± 25V 7.0V 50 mA Operating Range DS26F32M Temperature Supply Voltage −55˚C to +125˚C 4.5V to 5.5V Note 1: Derate cavity package 10 mW/˚C above 25˚C. Electrical Characteristics (Notes 3, 4) Over operating range, unless otherwise specified Symbol Parameter Min Typ Max Units −7.0V ≤ VCM ≤ +7.0V, V O = VOL or VOH −0.2 ± 0.06 +0.2 V Input Resistance −15V ≤ VCM ≤ +15V, 14 18 Input Current (under Test) One Input AC Ground V I = +15V, 2.3 Other Input −15V ≤ VI ≤ +15V V I = −15V, −2.8 VTH Differential Input Voltage RI II VOH VOL Output Voltage HIGH Output Voltage LOW VIL Enable Voltage LOW VIH Enable Voltage HIGH VIC Enable Clamp Voltage IOZ Off State (High Impedance) Output Current Conditions Other Input −15V ≤ VI ≤ +15V VCC = Min, 0˚C to +70˚C ∆VI = +1.0V, VENABLE = 0.8V, IOH = −440 µA −55˚C to +125˚C VCC = Min, ∆VI = −1.0V, VENABLE = 0.8V IOL = 4.0 mA IOL = 8.0 mA mA 2.8 3.4 2.5 3.4 V 0.4 0.45 0.8 2.0 CC = Min, II = −18 mA VCC = Max VO = 2.4V VO = 0.4V VI = 0.4V Enable Current LOW IIH Enable Current HIGH II Enable Input High Current IOS Output Short Circuit Current ICC Supply Current V Input Hysteresis Outputs Disabled T A = 25˚C, VCC = 5.0V, VCM = 0V VI = 2.7V VI = 5.5V V O = 0V, VCC = Max, (Note 5) ∆V I = +1.0V CC = Max, All VI = GND, V V V V IIL VHYST kΩ −1.5 V 20 µA −20 −15 −0.2 −0.36 mA 0.5 10 µA 1.0 50 µA −50 −85 mA 30 50 mA 30 mV Note 2: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The tables of “Electrical Characteristics” provide conditions for actual device operation. Note 3: Unless otherwise specified min/max limits apply across the −55˚C to +125˚C temperature range for the DS26F32M and across the 0˚C to +70˚C range for the DS26F32C. All typicals are given for V CC = 5V and TA = 25˚C. Note 4: All currents into the device pins are positive; all currents out of the device pins are negative. All voltages are reference to ground unless otherwise specified. Note 5: Only one output at a time should be shorted. www.national.com 2 Switching Characteristics VCC = 5.0V, TA = 25˚C Symbol Parameter tPLH Input to Output tPHL Input to Output tLZ Enable to Output tHZ Enable to Output tZL Enable to Output tZH Enable to Output Conditions (Figures 2, 3) Min Typ Max Units 15 22 ns 15 22 ns CL = 5 pF 14 18 ns 15 20 ns CL = 15 pF 13 18 ns 12 16 ns CL = 15 pF (Figures 2, 4) DS009615-2 FIGURE 1. Logic Symbol DS009615-3 FIGURE 2. Load Test Circuit for Three-State Outputs DS009615-4 FIGURE 3. Propagation Delay (Notes 6, 7, 8) 3 www.national.com Switching Characteristics (Continued) DS009615-5 Note 6: Diagram shown for ENABLE Low. Note 7: S1 and S2 of Load Circuit are closed except where shown. Note 8: Pulse Generator of all Pulses: Rate ≤ 1.0 MHz, ZO = 50Ω, tr ≤ 6.0 ns, tf ≤ 6.0 ns. Note 9: All diodes are IN916 or IN3064. Note 10: C L includes probe and jig capacitance. FIGURE 4. Enable and Disable Times (Notes 6, 7, 8) Typical Application DS009615-6 FIGURE 5. www.national.com 4 Physical Dimensions inches (millimeters) unless otherwise noted Order Number DS26F32ME/883 NS Package Number E20A Ceramic Dual-In-Line Package (J) Order Number DS26F32MJ/883 NS Package Number J16A 5 www.national.com DS26F32MQuad Differential Line Receivers Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number DS26F32MW/883 NS Package Number W16A 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. 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