DS9627 Dual Line Receiver General Description The DS9627 is a dual-line receiver which meets the electrical interface specifications of EIA RS-232C and MIL-STD-188C. The input circuitry accommodates ± 25V input signals and the differential inputs allow user selection of either inverting or non-inverting logic for the receiver operation. The DS9627 provides both a selectable hysteresis range and selectable receiver input resistance. When pin 1 is tied to V−, the typical switching points are at 2.6V and −2.6V, thus meeting RS-232-C requirements. When pin 1 is open, the typical switching points are at 50 µA and −50 µA, thus satisfying the requirements of MIL-STD-188C LOW level interface. Connecting the RA and/or RB pins to the (−) input yields an input impedance in the range of 3 kΩ to 7 kΩ and satisfies RS-232-C requirements; leaving RA and/or RB pins unconnected, the input resistance will be greater than 6 kΩ to satisfy MIL-STD-188C. The output circuitry is TTL/DTL compatible and will allow “collector-dotting” to generate the wired-OR function. A TTL/ DTL strobe is also provided for each receiver. Features n n n n n n n n EIA RS-232-C input standards MIL-STD-188C input standards Variable hysteresis control High common mode rejection R control (5 kΩ or 10 kΩ) Wired-OR capability Choice of inverting and non-inverting inputs Outputs and strobe TTL compatible Connection Diagram 16-Lead DIP DS009761-1 Top View Order Number DS9627MJ/883 See NS Package Number J16A For Complete Military 883 Specifications, see RETS Data Sheet. © 1999 National Semiconductor Corporation DS009761 www.national.com DS9627 Dual Line Receiver February 1996 Absolute Maximum Ratings (Note 1) Storage Temperature Range Operating Temperature Range Lead Temperature (Soldering, 60 sec.) Internal Power Dissipation (Note 5) V+ to GND V− to GND ± 25V −0.5V to +5.5V −0.5V to +15V Input Voltage Referred to GND Strobe to GND Applied Output Voltage If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Operating Conditions −65˚C to +175˚C −55˚C to +125˚C 300˚C 400 mW 0V to +15V 0V to −15V Min 4.5 −55 Supply Voltage (VCC) Temperature (TA) Max 5.5 +125 Units V ˚C Max Units 0.4 V Electrical Characteristics (Notes 2, 3) Hysteresis, −IN A, −IN B, RA and RB Open for MIL-STD-188C, unless otherwise specified Symbol VOL Output Voltage LOW VOH Output Voltage HIGH Conditions V+ = 10.8V, V− = −13.2V, VI+ = 0.6V, IOL = 6.4 mA V+ = 10.8V, V− = −13.2V, Output Short Circuit VI+ = 0.6V, IOH = −0.5 mA V+ = 13.2V, V− = −10.8V, IOS Characteristics Current (Note 4) IIH(ST) Input Current HIGH (Strobe) RI Input Resistance VI+ = 0.6V, VO = 0V V+ = 10.8V, V− = −13.2V, VI+ = 0.6V V+ = 13.2V, V− = −13.2V, Min 2.4 V −3.0 mA VST = 2.4V VST = 5.5V 40 µA 1.0 mA 6.0 kΩ −3.0V ≤ VI+ ≤ 3.0V ITH+ Positive Threshold Current ± 10.8V ≤ VCC ≤ ± 13.2V, VO = 2.4V ITH− Negative Threshold Current ± 10.8V ≤ VCC ≤ ± 13.2V, VO = 0.4V VI+ = −0.6V −100 2.0 VIL(ST) Input Voltage LOW (Strobe) VIH(ST) Input Voltage HIGH (Strobe) V+ = 13.2V, V− = −10.8V, VI+ = −0.6V I+ Positive Supply Current ± 10.8V ≤ VCC ≤ ± 13.2V VI+ = −0.6V I− Negative Supply Current ± 10.8V ≤ VCC ≤ ± 13.2V VI+ = 0.6V 100 µA µA 0.8 V V 18 −16 mA mA Electrical Characteristics +IN A and −IN B connected to ground, RA and RB connected to −IN A and −IN B and Hysteresis connected to V− for RS-232C, unless otherwise specified Symbol RI Characteristics Input Resistance VI Input Voltage VTH+ Positive Threshold Voltage VTH− Negative Threshold Voltage Min Max 3.0V ≤ VI ≤ 25V Conditions 3.0 7.0 kΩ −3.0V ≤ VI ≤ −25V 3.0 7.0 kΩ −2.0 2.0 V 3.0 V −3.0 Units V 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 −55˚C to +125˚C temperature range. Note 3: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to ground unless otherwise specified. Note 4: Only one output at a time should be shorted. Note 5: Rating applies to ambient temperatures up to +125˚C. Above 125˚C ambient, derate linearity at 120˚C/W. www.national.com 2 Electrical Characteristics VCC = ± 12V for MIL-STD-188C and RS-232C, TA = 25˚C Max Units tPLH Symbol Propagation Delay to High Level Characteristics See Figure 1 Conditions Min 250 ns tPHL Propagation Delay to Low Level See Figure 1 250 ns DS009761-2 DS009761-3 15 pF includes jig capacitance. All diodes are FD777 or equivalent. PRR = 10 kHz PW = 50 µs tr = tf = 5 ns FIGURE 1. Switching Time Test Circuit and Waveforms 3 www.national.com (1⁄2 of Circuit) DS009761-4 Equivalent Circuit www.national.com 4 DS9627 Dual Line Receiver Physical Dimensions inches (millimeters) unless otherwise noted Ceramic Dual-In-Line Package Order Number DS9627MJ/883 NS Package Number J16A 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. 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