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參數(shù)資料
| 型號： | HC158 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | QUAD 2 CHANNEL MULTIPLEXER |
| 中文描述： | 四2通道多 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大小： | 65K |
| 代理商： | HC158 |
74VHC157
QUAD 2 CHANNEL MULTIPLEXER
PRELIMINARY DATA
June 1999
I
HIGHSPEED:t
PD
=4.1ns(TYP.)atV
CC
= 5V
I
LOWPOWERDISSIPATION:
I
CC
=4
μ
A(MAX.) at T
A
=25
o
C
I
HIGHNOISEIMMUNITY:
V
NIH
= V
NIL
=28%V
CC
(MIN.)
I
POWERDOWN PROTECTIONON INPUTS
I
SYMMETRICALOUTPUTIMPEDANCE:
|I
OH
| = I
OL
= 8 mA(MIN)
I
BALANCEDPROPAGATIONDELAYS:
t
PLH
t
PHL
I
OPERATINGVOLTAGERANGE:
V
CC
(OPR)= 2Vto 5.5V
I
PINANDFUNCTION COMPATIBLEWITH
74SERIES157
I
IMPROVEDLATCH-UP IMMUNITY
I
LOWNOISE:V
OLP
= 0.8V(Max.)
DESCRIPTION
The 74VHC157 is an high-speed CMOS QUAD
2-CHANNEL
MULTIPLEXER
sub-micron silicon gate and double-layer metal
wiring C
2
MOS technology.
It consists of four 2-input digital multiplexers with
common select and strobe inputs. It
fabricated
with
is a
non-inverting multiplexer. When the STROBE
input is held high, selection of data is inhibited
and all the outputs become low. The SELECT
decoding determines whether the A or B inputs
get routed to theircorresponding Youtputs.
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface 5V to 3V.All inputs and outputs
are equippedwith protectioncircuits against static
discharge, giving them 2KV ESD immunity and
transientexcess voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
M1
(Micro Package)
T
(TSSOPPackage)
ORDER CODES :
74VHC157M
74VHC157T
1/9
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