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74F656A 데이터시트(PDF) 2 Page - NXP Semiconductors

부품명 74F656A
상세설명  Octal buffer/driver with parity, non-inverting 3-State
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74F656A 데이터시트(HTML) 2 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74F655A*
74F656A
Buffers/drivers
74F655A Octal buffer/driver with parity, inverting (3-State)
74F656A Octal buffer/driver with parity, non-inverting (3-State)
2
1991 Jul 17
853-0383 03305
* Discontinued part. Please see the Discontinued Products List.
FEATURES
Significantly improved AC performance over 74F655 and 74F656
High impedance NPN base input for reduced loading
(40
µA in High and Low states)
Ideal in applications where high output drive and light bus loading
are required (IIL is 40µA vs. FAST std of 600µA)
74F655A combines 74F240 and 74F280A functions in one
package
74F656A combines 74F244 and 74F280A functions in one
package
74F655A Inverting
74F656A Non-inverting
3-State outputs sink 64mA and source 15mA
24-pin plastic Slim DIP (300mil) package
Inputs on one side and outputs on the other side simplifies PC
board layout
Combined functions reduce part count and enhance system
performance
Industrial temperature range available (–40°C to +85°C)
DESCRIPTION
The 74F655A and 74F656A are octal buffers and line drivers with
parity generation/checking designed to be employed as memory
address drivers, clock drivers and bus-oriented
transmitters/receivers. These parts include parity generator/checker
to improve PC board density.
TYPE
TYPICAL
PROPAGATION
DELAY
TYPICAL SUPPLY CURRENT
(TOTAL)
74F655A
6.5ns
64mA
74F656A
6.5ns
64mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
INDUSTRIAL RANGE
VCC = 5V ±10%,
Tamb = –40°C to +85°C
PKG DWG #
24-pin Plastic Slim
DIP (300mil)
N74F656AN
I74F656AN
SOT222-1
24-pin Plastic SOL
N74F656AD
I74F656AD
SOT137-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F(U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
D0–D7
Data inputs
2.0/0.066
40
µA/40µA
PI
Parity input
1.0/0.033
20
µA/20µA
OE0, OE1, OE2
Output Enable Inputs (active Low)
1.0/0.033
20
µA/20µA
ΣE, ΣO
Parity outputs
750/106.7
15mA/64mA
Q0–Q7
Data outputs (74F655A)
750/106.7
15mA/64mA
Q0–Q7
Data outputs (74F656A)
750/106.7
15mA/64mA
NOTE: One (1.0) FAST Unit Load (U.L.) is defined as: 20
µA in the High state and 0.6mA in the Low state.


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