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UPD4702C 数据表(PDF) 1 Page - NEC

部件名 UPD4702C
功能描述  INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS
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制造商  NEC [NEC]
网页  http://www.nec.com/
标志 NEC - NEC

UPD4702C 数据表(HTML) 1 Page - NEC

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DESCRIPTION
The
µPD4702 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
µPD4704 is also available; use of these enables the count width to be extended.
©
1994
DATA SHEET
1993
INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER
CMOS INTEGRATED CIRCUITS
µPD4702
MOS INTEGRATED CIRCUIT
FEATURES
• Incremental inputs (A, B)
• On-chip phase discrimination circuit (up-count mode
when the phase order is A
→ B, down-count mode
when B
→ A) 4-multiplication count method
• On-chip edge detection circuit
• 8-bit up/down counter latch output o Carry output,
borrow output
• Count data output controllable (3-state output)
• CMOS, single +5 V power supply
ORDERING INFORMATION
Part Number
Package
µPD4702C
20-pin plastic DIP
(300 mil)
µPD4702G
20-pin plastic SOP
(300 mil)
1
2
3
4
5
6
7
8
9
10
Reset
A
B
NC
CD0
CD1
CD2
CD3
NC
VSS
VDD
Carry
Borrow
STB
OE
CD7
CD6
CD5
CD4
NC
20
19
18
17
16
15
14
13
12
11
PIN CONFIGURATION (Top View)
PIN NAMES
A
2-phase incremental signal inputs
B
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
Document No.
IC-3304A (2nd edition)
(O. D. No.
IC-5403A)
Date Published April 1997 P
Printed in Japan


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