UPD4712C View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

MFG CO.

UPD4712C

RS-232 LINE DRIVER/RECEIVER

NEC => Renesas Technology 

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BLOCK DIAGRAM/PIN CONFIGURATION (Top View)

µPD4712C/4712D

+

C1

+5 V

+10 V

+

C3

Bypass

capasitor

DIN1

TTL/CMOS DIN2

INPUT

DIN3

1 VDD

2 C1+

3 VCC

4 C1–

5 GND

6

7

8

DIN4 9

Output control DCON 10

ROUT1 11

TTL/CMOS

OUTPUT

ROUT2 12

ROUT3 13

ROUT4 14

DC-DC

converter

C4+ 28

GND 27

C4– 26

+

C4

+

C2

VSS 25

–10 V

24 STBY Standby

5.5 kΩ

300 Ω

300 Ω

300 Ω

300 Ω

23 DOUT1

22 DOUT2

21 DOUT3

20 DOUT4

19 RIN1

18 RIN2

5.5 kΩ

17 RIN3

RS-232

OUTPUT

RS-232

INPUT

5.5 kΩ

16 RIN4

5.5 kΩ

15 RCON

Threshold control

* VDD and Vss are output pins of voltages internally boosted. Connecting a load directly to these pins is not

recommended.

** The standby pin is internally pulled down.

*** Use capacitors with a working voltage of 16 V or higher as C1 through C4. Insert a bypass capasitor about 0.1

to 1 µF between VCC pin to GND pin.

2

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