NSC 5962-8978701MEA Datasheet

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 selectionof
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
6kΩto 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 EIA RS-232-C input standards
n MIL-STD-188C input standards
n Variable hysteresis control
n High common mode rejection
n R control (5 kΩ or 10 kΩ)
n Wired-OR capability
n Choice of inverting and non-inverting inputs
n 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.

February 1996

DS9627 Dual Line Receiver

© 1999 National Semiconductor Corporation DS009761 www.national.com

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 −65˚C to +175˚C
Operating Temperature Range −55˚C to +125˚C
Lead Temperature (Soldering, 60 sec.) 300˚C
Internal Power Dissipation (Note 5) 400 mW
V

+

to GND 0V to +15V

V

−

to GND 0V to −15V

Input Voltage Referred to GND

±

25V
Strobe to GND −0.5V to +5.5V
Applied Output Voltage −0.5V to +15V

Operating Conditions

Min Max Units

Supply Voltage (V

CC

) 4.5 5.5 V

Temperature (T

A

) −55 +125 ˚C

Electrical Characteristics (Notes 2, 3)

Hysteresis, −IN A, −IN B, RA and RB Open for MIL-STD-188C, unless otherwise specified

Symbol Characteristics Conditions Min Max Units

V

OL

Output Voltage LOW V

+

=

10.8V, V

−

=

−13.2V, 0.4 V

V

I

+

=

0.6V, I

OL

=

6.4 mA

V

OH

Output Voltage HIGH V

+

=

10.8V, V

−

=

−13.2V, 2.4 V

V

I

+

=

0.6V, I

OH

=

−0.5 mA

I

OS

Output Short Circuit V+=13.2V, V

−

=

−10.8V, −3.0 mA

Current (Note 4) V

I+

=

0.6V, V

O

=

0V

I

IH

(ST) Input Current HIGH V

+

=

10.8V, V

ST

=

2.4V 40 µA

(Strobe) V

−

=

−13.2V, V

I

+

=

0.6V V

ST

=

5.5V 1.0 mA

R

I

Input Resistance V

+

=

13.2V, V

−

=

−13.2V, 6.0 kΩ

−3.0V ≤ V

I

+

≤ 3.0V

I

TH+

Positive Threshold Current

±

10.8V ≤ VCC≤±13.2V, 100 µA

V

O

=

2.4V

I

TH

−

Negative Threshold Current

±

10.8V ≤ VCC≤±13.2V, −100 µA

V

O

=

0.4V

V

IL

(ST) Input Voltage LOW (Strobe) V

I

+

=

−0.6V 0.8 V

V

IH

(ST) Input Voltage HIGH (Strobe) V

+

=

13.2V, V

−

=

−10.8V, 2.0 V

V

I

+

=

−0.6V

I

+

Positive Supply Current

±

10.8V ≤ VCC≤±13.2V 18 mA

V

I

+

=

−0.6V

I

−

Negative Supply Current

±

10.8V ≤ VCC≤±13.2V −16 mA

V

I

+

=

0.6V

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 Characteristics Conditions Min Max Units

R

I

Input Resistance 3.0V ≤ VI≤ 25V 3.0 7.0 kΩ

−3.0V ≤ V

I

≤ −25V 3.0 7.0 kΩ

V

I

Input Voltage −2.0 2.0 V

V

TH+

Positive Threshold Voltage 3.0 V

V

TH−

Negative Threshold Voltage −3.0 V

Note 1: “AbsoluteMaximum 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.

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