UPD4704 Datasheet, PDF (1/16 Pages) NEC – EXTENSION 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS

DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4704
EXTENSION 8-BIT UP/DOWN COUNTER
CMOS INTEGRATED CIRCUITS
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
CD0-7 : Count data outputs
Carry : Carry pulse output
Borrow : Borrow pulse output
ORDERING INFORMATION
Part Number
µPD4704C
µPD4704G
Package
20-pin plastic DIP (300 mil)
20-pin plastic SOP (300 mil)
PIN CONFIGURATION (Top View)
Reset
1
A
2
B
3
NC
4
CD0
5
CD1
6
CD2
7
CD3
8
NC
9
VSS
10
20
VDD
19
Carry
18
Borrow
17
STB
16
OE
15
CD7
14
CD6
13
CD5
12
CD4
11
NC
Document No. IC-3305A (2nd edition)
(O. D. No. IC-8762B)
Date Published April 1997 P
Printed in Japan
©
1993