DS26F32C/DS26F32M Quad Differential Line Receiver General Description Features The DS26F32 is a quad differential line receiver designed to meet the requirements of EIA Standards RS-422 and RS423, 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 g 7.0V. The DS26F32 provides an enable function common to all four receivers and TRI-STATEÉ 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. Y Y Y Y Y Y Y Y Y Military temperature range Input voltage range of g 7.0V (differential or common mode) g 0.2V sensitivity over the input voltage range Meets all the requirements of EIA standards RS-422 and RS-423 High input impedance (18k typical) 30 mV input hysteresis Operation from single a 5.0V supply Input pull-down resistor prevents output oscillation on unused channels TRI-STATE outputs, with choice of complementary enables, for receiving directly onto a data bus Propagation delay 15 ns typical Connection Diagrams 20-Lead Ceramic Leadless Chip Carrier 16-Lead DIP TL/F/9615 – 7 Function Table (Each Receiver) Differential Inputs TL/F/9615 – 1 For Complete Military 883 Specifications, see RETS Datasheet. Order Number DS26F32ME/883, DS26F32MJ/883 or DS26F32MW/883 See NS Package Number E20A, J16A or W16A Outputs E E OUT VID t 0.2V H X X L H H VID s b0.2V H X X L L L X L H Z Top View Order Number DS26F32CJ or DS26F32MJ See NS Package Number J16A Enables VID e (VIN a ) b (VINb) H e High Level L e Low Level X e Immaterial TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. C1996 National Semiconductor Corporation TL/F/9615 RRD-B30M36/Printed in U. S. A. http://www.national.com DS26F32C/DS26F32M Quad Differential Line Receiver January 1996 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Storage Temperature Range Ceramic DIP b 65§ C to a 175§ C Operating Temperature Range DS26F32M DS26F32C b 55§ C to a 125§ C 0§ C to a 70§ C Lead Temperature Ceramic DIP (soldering, 60 sec) Maximum Power Dissipation* at 25§ C Cavity Package Supply Voltage Common Mode Voltage Range g 25V Differential Input Voltage g 25V Enable Voltage Output Sink Current 50 mA 7.0V Operating Range DS26F32C Temperature Supply Voltage DS26F32M Temperature Supply Voltage 300§ C 1500 mW 7.0V 0§ C to a 70§ C 4.75V to 5.25V b 55§ C to a 125§ C 4.5V to 5.5V *Derate cavity package 10 mW/§ C above 25§ C. Electrical Characteristics Over operating range, unless otherwise specified (Notes 2 and 3) Min Typ Max Units VTH Symbol Differential Input Voltage b 7.0V s VCM s a 7.0V, VO e VOL or VOH b 0.2 g 0.06 a 0.2 V RI Input Resistance b 15V s VCM s a 15V, One Input AC Ground 14 18 II Input Current (under Test) VI e a 15V, Other Input b15V s VI s a 15V 2.3 VI e b15V, Other Input b15V s VI s a 15V b 2.8 VOH VOL Parameter Output Voltage HIGH Output Voltage LOW Conditions VCC e Min, DVI e a 1.0V, VENABLE e 0.8V, IOH e b440 mA 0§ C to a 70§ C kX mA 2.8 3.4 2.5 3.4 V b 55§ C to a 125§ C VCC e Min, DVI e b1.0V, VENABLE e 0.8V IOL e 4.0 mA 0.4 IOL e 8.0 mA 0.45 VIL Enable Voltage LOW VIH Enable Voltage HIGH VIC Enable Clamp Voltage VCC e Min, II e b18 mA IOZ Off State (High Impedance) Output Current VCC e Max V 0.8 V b 1.5 V 2.0 V VO e 2.4V 20 VO e 0.4V b 20 mA IIL Enable Current LOW VI e 0.4V b 0.2 b 0.36 mA IIH Enable Current HIGH VI e 2.7V 0.5 10 mA II Enable Input High Current VI e 5.5V 1.0 50 mA IOS Output Short Circuit Current VO e 0V, VCC e Max, (Note 4) DVI e a 1.0V b 50 b 85 mA ICC Supply Current VCC e Max, All VI e GND, Outputs Disabled 30 50 mA VHYST Input Hysteresis TA e 25§ C, VCC e 5.0V, VCM e 0V 30 b 15 mV 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 devices should be operated at these limits. The tables of ‘‘Electrical Characteristics’’ provide conditions for actual device operation. Note 2: Unless otherwise specified min/max limits apply across the b 55§ C to a 125§ C temperature range for the DS26F32M and across the 0§ C to a 70§ C range for the DS26F32C. All typicals are given for VCC e 5V and TA e 25§ C. Note 3: 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 4: Only one output at a time should be shorted. http://www.national.com 2 Switching Characteristics VCC e 5.0V, TA e 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 CL e 15 pF CL e 5 pF Figures 2 , 4 CL e 15 pF Typ Max Units 15 22 ns 15 22 ns 14 18 ns 15 20 ns 13 18 ns 12 16 ns TL/F/9615 – 2 FIGURE 1. Logic Symbol TL/F/9615 – 4 TL/F/9615 – 3 FIGURE 2. Load Test Circuit for Three-State Outputs FIGURE 3. Propagation Delay (Notes 1, 2 and 3) Note 1: Diagram shown for ENABLE Low. Note 2: S1 and S2 of Load Circuit are closed except where shown. Note 3: Pulse Generator of all Pulses: Rate s 1.0 MHz, ZO e 50X, tr s 6.0 ns, tf s 6.0 ns. Note 4: All diodes are IN916 or IN3064. Note 5: CL includes probe and jig capacitance. TL/F/9615 – 5 FIGURE 4. Enable and Disable Times (Notes 1, 2 and 3) 3 http://www.national.com Typical Application TL/F/9615 – 6 FIGURE 5 Physical Dimensions inches (millimeters) Order Number DS26F32ME/883 NS Package Number E20A http://www.national.com 4 Physical Dimensions inches (millimeters) (Continued) Ceramic Dual-In-Line Package (J) Order Number DS26F32CJ, DS26F32MJ or DS26F32MJ/883 NS Package Number J16A 5 http://www.national.com DS26F32C/DS26F32M Quad Differential Line Receiver Physical Dimensions inches (millimeters) (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 OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. 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