UPD4702 반도체 회로 부품 판매점
INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS
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 NEC |
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD4702
INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER
CMOS INTEGRATED CIRCUITS
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.
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
µPD4702C
µPD4702G
Package
20-pin plastic DIP
20-pin plastic SOP
(300 mil)
(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
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
© 11999934
BLOCK DIAGRAM
Reset
A
B
Phase
Discrimination
Edge Detection
8-Bit Up/Down Counter
8-Bit Latch
3-State Output
µPD4702
Carry
Borrow
STB
OE
CD0–7
PIN FUNCTIONS
Pin Name
A, B
D0 to 7
Carry
Borrow
RESET
OE
STB
VDD
GND
Input/Output
Function
Input
(Schmitt)
Output
(3-state)
Output
Output
Input
(Schmitt)
Input
Input
Incremental signal A phase and B phase signal input pins (Schmitt input)
Count data output pins. Activated when OE is “L”, high impedance outputs when OE
is “H”.
8-bit counter carry signal output pin (active-low)
8-bit counter borrow signal output pin (active-low)
8-bit counter reset signal output pin
Counter is reset when this pin is “H”.
Count data output control signal input pin
Counter data output latch signal. Data is latched on the fall of STB, and is held while
STB = “L”.
Power supply input pin
Ground pin
2
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제조업체: NEC
( nec )
UPD4702 cmos
데이터시트 다운로드 :
[ UPD4702.PDF ]
[ UPD4702 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
관련 데이터시트
UPD4701A
MOS INTEGRATED CIRCUIT - NEC
UPD4702
INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS - NEC
UPD4702C
INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS - NEC
UPD4702G
INCREMENTAL ENCODER 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS - NEC
UPD4704
EXTENSION 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS - NEC
UPD4704C
EXTENSION 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS - NEC
UPD4704G
EXTENSION 8-BIT UP/DOWN COUNTER CMOS INTEGRATED CIRCUITS - NEC