DESCRIPTION

The

µPD4704 is 8-bit up/down counters for extension of the µPD4702 incremental encoder counter. They perform

an up/down-count using an 8-bit width with a

µPD4702 carry or borrow signal as input. In addition, a carry output

and borrow output are also provided for further extension of the count width, enabling extension to be performed

in 8-bit units.

FEATURES

• 8-bit up/down counter for extension of

µPD4702

• Count data output controllable (latch and 3-state output)

• Extension carry and borrow outputs

• CMOS, single +5 V power supply

PIN NAMES

Up

: Up-count input

Down

: Down-count input

Reset

: Counter reset input

STB

: Latch strobe signal input

OE

: Output control signal input

: Count data outputs

Carry

: Carry pulse output

Borrow : Borrow pulse output

ORDERING INFORMATION

MOS INTEGRATED CIRCUIT

EXTENSION 8-BIT UP/DOWN COUNTER

CMOS INTEGRATED CIRCUITS

Part Number

Package

µPD4704C

20-pin plastic DIP

(300 mil)

µPD4704G

20-pin plastic SOP

(300 mil)

PIN CONFIGURATION (Top View)

1

2

3

4

5

6

7

8

9

10

Reset

A

B

NC

NC

Carry

Borrow

STB

OE

NC

20

19

18

17

16

15

14

13

12

11

Document No.

IC-3305A (2nd edition)

(O. D. No.

IC-8762B)

Date Published April 1997 P

Printed in Japan

©

1993

DATA SHEET