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AD7306JRZ

+5 V Powered RS-232/RS-422 Transceiver

Analog Devices 

AD7306

SOIC DIP

Pin Pin

1

19

2, 3 20, 22

4

23

5

24

6

1

7

2

8

3

9

4

10

11

12, 13

14, 18

15

5

6

16, 21

7, 11

8

16

17

19

20

21

22, 23

24

9

10

12

13

14

15, 17

18

PIN FUNCTION DESCRIPTION

Mnemonic

V+

C1+, C1–

R2IN

T1OUT

T2OUT

VCC

R1IN (B)

R1IN/R1IN (A)

T3OUT (B)

T3OUT (A)

NC

GND

232/422 SEL

T3IN

R1OUT

T2IN

T1IN

R2OUT

C2+, C2–

V–

Function

Internally Generated Positive Supply (+9 V nominal). A 0.1 µF capacitor must be connected

between this pin and GND.

External Capacitor 1 Terminals. A 0.1 µF capacitor must be connected between these pins.

RS-232 Receiver R2 Input. This input accepts RS-232 input voltages.

RS-232 Transmitter (Driver) T1 Output (Typically ± 7.5 V).

RS-232 Transmitter (Driver) T2 Output (Typically ± 7.5 V).

Power Supply Input (5 V ± 5%).

RS-422 Receiver R1, Differential Input B.

Receiver R1 Input. May be configured to accept either single ended RS-232 levels or

differential RS-422 levels. It is configured using the 232/422 SEL pin.

RS-422 Transmitter (Driver) T3, Differential Output B.

RS-422 Transmitter (Driver) T3, Differential Output A.

No Connect Pins.

Ground Pin. Must be connected to 0 V.

Select Input. This input configures Receiver R1 to accept either RS-232 or RS-422 signal lev-

els. A Logic 1 on this input selects 232 operation while a Logic 0 selects 422 operation.

TTL/CMOS Input to the RS-422 Transmitter T3.

TTL/CMOS Output from Receiver R1.

TTL/CMOS Input to RS-232 Transmitter T2.

TTL/CMOS Input to RS-232 Transmitter T1.

TTL/CMOS Output from Receiver R2.

External Capacitor 2 Terminals. A 0.1 µF capacitor must be connected between these pins.

Internally Generated Negative Supply (–9 V nominal). A 0.1 µF capacitor must be connected

between this pin and GND.

PIN CONFIGURATIONS

SOIC

DIP

V+ 1

C1+ 2

C1– 3

R2IN 4

T1OUT 5

T2OUT 6

VCC 7

R1IN (B) 8

R1IN /R1IN (A) 9

T3OUT(B) 10

T3OUT(A) 11

NC 12

AD7306

SOIC

TOP VIEW

(Not to Scale)

24 V–

23 C2–

22 C2+

21 R2OUT

20 T1IN

19 T2IN

18 GND

17 R1OUT

16 T3IN

15 232/422 SEL

14 GND

13 NC

NC = NO CONNECT

T2OUT 1

VCC 2

R1IN (B) 3

R1IN /R1IN (A) 4

T3OUT(B) 5

T3OUT(A) 6

GND 7

232/422 SEL 8

T3IN 9

R1OUT 10

GND 11

T2IN 12

AD7306

DIP

TOP VIEW

(Not to Scale)

24 T1OUT

23 R2IN

22 C1–

21 NC

20 C1+

19 V+

18 V–

17 C2–

16 NC

15 C2+

14 R2OUT

13 T1IN

NC = NO CONNECT

–4–

REV. D

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