74ACTQ657 반도체 회로 부품 판매점

Quiet Series Octal Bidirectional Transceiver



Fairchild Semiconductor 로고
Fairchild Semiconductor
74ACTQ657 데이터시트, 핀배열, 회로
January 1990
Revised September 2000
74ACQ657 74ACTQ657
Quiet SeriesOctal Bidirectional Transceiver with
8-Bit Parity Generator/Checker and 3-STATE Outputs
General Description
The ACQ/ACTQ657 contains eight non-inverting buffers
with 3-STATE outputs and an 8-bit parity generator/
checker. Intended for bus oriented applications, the device
combines the 245 and the 280 functions in one package.
The ACQ/ACTQ utilizes Fairchild Quiet Seriestechnol-
ogy to guarantee quiet output switching and improved
dynamic threshold performance. FACT Quiet Series fea-
tures GTOoutput control and undershoot corrector in
addition to a split ground bus or superior performance.
Features
s Guaranteed simultaneous switching noise level and
dynamic threshold performance
s Guaranteed pin-to-pin skew AC performance
s Combines the 245 and the 280 functions in one package
s 300 mil 24-pin slim dual-in-line package
s Outputs source/sink 24 mA
s ACTQ has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74ACQ657SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
74ACTQ657SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74ACTQ657SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
A0A7
B0B7
T/R
OE
PARITY
ODD/EVEN
ERROR
Description
Data Inputs/3-STATE Outputs
Data Inputs/3-STATE Outputs
Transmit/Receive Input
Enable Input
Parity Input/3-STATE Output
ODD/EVEN Parity Input
Error 3-STATE Output
FACT, Quiet Series, FACT Quiet Series, and GTOare trademarks of Fairchild Semiconductor Corporation.
© 2000 Fairchild Semiconductor Corporation DS010636
www.fairchildsemi.com

74ACTQ657 데이터시트, 핀배열, 회로
Functional Description
The Transmit/Receive (T/R) input determines the direction
of the data flow through the bidirectional transceivers.
Transmit (active HIGH) enables data from the A-Port to the
B-Port; Receive (active LOW) enables data from the B-Port
to the A-Port.
The Output Enable (OE) input disables the parity and
ERROR outputs and both the A and B Ports by placing
them in a HIGH-Z condition when the Output Enable input
is HIGH.
When transmitting (T/R HIGH), the parity generator detects
whether an even or odd number of bits on the A-Port are
HIGH and compares these with the condition of the parity
select (ODD/EVEN). If the Parity Select is HIGH and an
even number of A inputs are HIGH, the Parity output is
HIGH.
In receiving mode (T/R LOW), the parity select and number
of HIGH inputs on port B are compared to the condition of
the Parity input. If an even number of bits on the B-Port are
HIGH, the parity select is HIGH, and the PARITY input is
HIGH, then ERROR will be HIGH to indicate no error. If an
odd number of bits on the B-Port are HIGH, the parity
select is HIGH, and the PARITY input is HIGH, the ERROR
will be LOW indicating an error.
Function Table
Number of
Inputs That
Are High
0, 2, 4, 6, 8
1, 3, 5, 7
Immaterial
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
OE
L
L
L
L
L
L
L
L
L
L
L
L
H
Inputs
T/R
H
H
L
L
L
L
H
H
L
L
L
L
X
ODD/EVEN
H
L
H
H
L
L
H
L
H
H
L
L
X
Input/
Output
Parity
H
L
H
L
H
L
L
H
H
L
H
L
Z
Outputs
ERROR
Z
Z
H
L
L
H
Z
Z
L
H
H
L
Z
Outputs Mode
Transmit
Transmit
Receive
Receive
Receive
Receive
Transmit
Transmit
Receive
Receive
Receive
Receive
Z
Function Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Inputs
OE T/R
LL
LH
HX
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
High-Z State
www.fairchildsemi.com
2




PDF 파일 내의 페이지 : 총 10 페이지

제조업체 : Fairchild Semiconductor ( fairchild )

74ACTQ657 transceiver

데이터시트 다운로드
:

[ 74ACTQ657.PDF ]

[ 74ACTQ657 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


일반적인 전자부품 판매점


디바이스마트

IC114

엘레파츠

ICbanQ

Mouser Electronics

DigiKey Electronics

Element14


추천 데이터시트


74ACTQ652

Quiet Series Transceiver/Register - Fairchild Semiconductor



74ACTQ652MTC

Quiet Series Transceiver/Register - Fairchild Semiconductor



74ACTQ652SC

Quiet Series Transceiver/Register - Fairchild Semiconductor



74ACTQ652SPC

Quiet Series Transceiver/Register - Fairchild Semiconductor



74ACTQ657

Quiet Series Octal Bidirectional Transceiver - Fairchild Semiconductor