Details, datasheet, quote on part number: DS9627M
CategoryInterface and Interconnect => RS-232 (EIA-232) => RS-232 Serial Port
TitleRS-232 Serial Port
DescriptionDS9627 - Dual Line Receiver, Package: Cerdip, Pin Nb=16
CompanyNational Semiconductor Corporation
DatasheetDownload DS9627M datasheet


Features, Applications

The 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 50 A and -50 A, 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 7 k and satisfies RS-232-C requirements; leaving RA and/or RB pins unconnected, the input resistance will be greater than k 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.


EIA RS-232-C input standards MIL-STD-188C input standards Variable hysteresis control High common mode rejection R control 10 k) Wired-OR capability Choice of inverting and non-inverting inputs Outputs and strobe TTL compatible

Top View Order Number DS9627MJ/883 See NS Package Number J16A For Complete Military 883 Specifications, see RETS Data Sheet.

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Operating Temperature Range Lead Temperature (Soldering, 60 sec.) Internal Power Dissipation (Note V+ to GND V- to GND to -15V

Input Voltage Referred to GND Strobe to GND Applied Output Voltage
Supply Voltage (VCC) Temperature (TA) Min 4.5 -55 Max 5.5 +125 Units V C

Hysteresis, -IN A, -IN B, RA and RB Open for MIL-STD-188C, unless otherwise specified Symbol VOL VOH IOS IIH(ST) RI ITH+ ITH- VIL(ST) VIH(ST) I+ I- Characteristics Output Voltage LOW Output Voltage HIGH Output Short Circuit Current (Note 4) Input Current HIGH (Strobe) Input Resistance Positive Threshold Current Negative Threshold Current Input Voltage LOW (Strobe) Input Voltage HIGH (Strobe) Positive Supply Current Negative Supply Current Conditions = -13.2V, VI+ = 0.6V, IOL = -13.2V, VI+ = 0.6V, IOH = -10.8V, VI+ = -13.2V, VI+ -13.2V, -3.0V VI+ 3.0V VST = 2.4V VST = 5.5V Min Max Units V mA

+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 VI VTH+ VTH- Characteristics Input Resistance Input Voltage Positive Threshold Voltage Negative Threshold Voltage -3.0 Conditions VI -25V Min 3.0 -2.0 Max Units

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 to +125C 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 to +125C. Above 125C ambient, derate linearity at 120C/W.

VCC 12V for MIL-STD-188C and = 25C Symbol tPLH tPHL Characteristics Propagation Delay to High Level Propagation Delay to Low Level Conditions See Figure 1 See Figure 1 Min Max 250 Units ns

FIGURE 1. Switching Time Test Circuit and Waveforms


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