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CY74FCT257CTQCT Datasheet

  • CY74FCT257CTQCT

  • Texas Instruments [QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OU...

  • TI

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CY74FCT257T
QUAD 2-INPUT MULTIPLEXER
WITH 3-STATE OUTPUTS
SCCS019D 鈥?MAY 1994 鈥?REVISED NOVEMBER 2001
D
D
D
D
D
D
D
D
D
Function, Pinout, and Drive Compatible
With FCT and F Logic
Reduced V
OH
(Typically = 3.3 V) Version of
Equivalent FCT Functions
Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
I
off
Supports Partial-Power-Down Mode
Operation
Matched Rise and Fall Times
Fully Compatible With TTL Input and
Output Logic Levels
ESD Protection Exceeds JESD 22
鈥?2000-V Human-Body Model (A114-A)
鈥?200-V Machine Model (A115-A)
鈥?1000-V Charged-Device Model (C101)
64-mA Output Sink Current
32-mA Output Source Current
3-State Outputs
Q OR SO PACKAGE
(TOP VIEW)
S
I
0a
I
1a
Y
a
I
0b
I
1b
Y
b
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
OE
I
0c
I
1c
Y
c
I
0d
I
1d
Y
d
description
The CY74FCT257T has four identical two-input multiplexers that select four bits of data from two sources under
the control of a common data-select (S) input. The I
0
inputs are selected when S is low, and the I
1
inputs are
selected when S is high. Data at the output is noninverted.
The CY74FCT257T is a logic implementation of a four-pole, two-position switch, where the position of the switch
is determined by the logic levels at S. Outputs are in the high-impedance state when the output-enable (OE)
input is high.
All but one device must be in the high-impedance state to avoid currents exceeding the maximum ratings if
outputs are tied together. OE inputs must ensure that there is no overlap when outputs of 3-state devices are
tied together.
This device is fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
PIN DESCRIPTION
NAME
I
S
OE
Y
DESCRIPTION
Data inputs
Common data-select input
Output-enable input (active low)
Data outputs
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
錚?/div>
2001, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

CY74FCT257CTQCT PDF文件相關型號

CY74FCT257CTSOCT,CY74FCT257TSOIC

CY74FCT257CTQCT 產(chǎn)品屬性

  • 2,500

  • 集成電路 (IC)

  • 邏輯 - 信號開關，多路復用器，解碼器

  • 74FCT

  • 多路復用器

  • 4 x 2:1

  • 1

  • 32mA，64mA

  • 單電源

  • 4.75 V ~ 5.25 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 16-SSOP（0.154"，3.90mm 寬）

  • 16-SSOP/QSOP

  • 帶卷 (TR)

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