UPD4726GS-BAF View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD4726GS-BAF

RS-232 LINE DRIVER/RECEIVER

NEC => Renesas Technology 

BLOCK DIAGRAM/PIN CONFIGURATION (Top View)

+5 V

+10 V

+

C3

+

C1

1 VDD

2 C1+

3 VCC

4 C1-

5 N.C.

6 GND

7 N.C.

DIN1 8

DIN2 9

DIN3 10

DIN4 11

ROUT1 12

ROUT2 13

ROUT3 14

ROUT4 15

ROUT5 16

ROUT6 17

ROUT7 18

C4+ 36

GND 35

C4- 34

+

C4

+

C2

To internal

circuit

To internal

circuit

VSS 33

32 STBY

31 GND

30 EN

−10 V

29 DOUT1

28 DOUT2

27 DOUT3

26 DOUT4

25 RIN1

24 RIN2

23 RIN3

22 RIN4

21 RIN5

20 RIN6

19 RIN7

µPD4726

Notes 1. VDD and VSS output internally boosted voltages. Do not connect a load directly to these pins.

2. It is recommended that capacitors having a breakdown voltage of 20 V or higher be used as C1 through

C5. Inserting a bypass capacitor of 0.1 to 1 µF in between VCC and GND is also recommended.

3. Be sure to connect all the GND pins. Especially, make sure that pin 31 is connected; otherwise, the

µPD4726 will not operate normally. Be sure to leave the NC pins (pins 5 and 7) open.

4. The pull-up resistors for DIN1 through DIN4 and STBY and the pull-down resistor for EN are active resistors.

2

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