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UPD4702 Datasheet

  • UPD4702

  • INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CI...

  • 16頁

  • NEC   NEC

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DATA SHEET
MOS INTEGRATED CIRCUIT
碌
PD4702
INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER
CMOS INTEGRATED CIRCUITS
DESCRIPTION
The
碌
PD4702 is 8-bit up/down counters for an incremental encoder. Two-phase (A, B) incremental input signals
are phase-differentiated, and on each signal edge, an up-count is executed if the A phase is leading, or a down-count
if the B phase is leading. Eight-bit count data is output in real time. A carry output and borrow output are also
provided for counter overflow and underflow.
The
碌
PD4704 is also available; use of these enables the count width to be extended.
FEATURES
鈥?/div>
Incremental inputs (A, B)
鈥?/div>
On-chip phase discrimination circuit (up-count mode
when the phase order is A
鈫?/div>
B, down-count mode
when B
鈫?/div>
A) 4-multiplication count method
鈥?/div>
On-chip edge detection circuit
鈥?/div>
8-bit up/down counter latch output o Carry output,
borrow output
鈥?/div>
Count data output controllable (3-state output)
鈥?/div>
CMOS, single +5 V power supply
PIN CONFIGURATION (Top View)
Reset
A
B
NC
CD
0
CD
1
CD
2
CD
3
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DD
Carry
Borrow
STB
OE
CD
7
CD
6
CD
5
CD
4
NC
ORDERING INFORMATION
Part Number
Package
20-pin plastic DIP
20-pin plastic SOP
(300 mil)
(300 mil)
NC
V
SS
碌
PD4702C
碌
PD4702G
PIN NAMES
A
B
Reset
STB
OE
CD
0-7
Carry
錚?/div>
錕?frac12;
2-phase incremental signal inputs
錚?/div>
: Counter reset input
: Latch strobe signal input
: Output control signal input
: Count data outputs
: Carry pulse output
Borrow : Borrow pulse output
Document No. IC-3304A (2nd edition)
(O. D. No. IC-5403A)
Date Published April 1997 P
Printed in Japan
漏
1993
1994

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