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UPD4704 fiches techniques PDF

NEC - EXTENSION 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS

Numéro de référence UPD4704
Description EXTENSION 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS
Fabricant NEC 
Logo NEC 





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UPD4704 fiche technique
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
A
B
NC
CD0
CD1
CD2
CD3
NC
VSS
1
2
3
4
5
6
7
8
9
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

PagesPages 16
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