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參數(shù)資料
| 型號(hào)： | M54HCT157 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER INV. |
| 中文描述： | HCT157四2通道多HCT158四2通道多刑事調(diào)查。 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 250K |
| 代理商： | M54HCT157 |
M54HCT157/158
M74HCT157/158
April1993
HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV.)
LOWPOWER DISSIPATION
I
CC
= 4
μ
A (MAX.) AT T
A
= 25
°
C
.
COMPATIBLE WITHTTL OUTPUTS
V
IH
= 2V (MIN.) V
IL
= 0.8V (MAX)
.
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
.
SYMMETRICAL OUTPUT IMPEDANCE
IOH
= I
OL
= 4 mA(MIN.)
.
BALANCEDPROPAGATION DELAYS
t
PLH
= t
PHL
.
PIN ANDFUNCTION COMPATIBLE
WITH 54/74LS157/158
HCT157 QUAD 2 CHANNEL MULTIPLEXER
B1R
(Plastic Package)
ORDER CODES :
M54HCTXXXF1R
M74HCTXXXB1R
M74HCTXXXM1R
M74HCTXXXC1R
F1R
(CeramicPackage)
M1R
(MicroPackage)
C1R
(Chip Carrier)
PIN CONNECTIONS
(top view)
NC =
No Internal
Connection
HCT158
HCT157
DESCRIPTION
.
HIGH SPEED
t
PD
= 21 ns(TYP.) AT V
CC
= 5 V
The M54/74HCT157 and the M54/74HCT158 are
high speed CMOS QUAD 2-CHANNEL MULTI-
PLEXERs fabricated with silicon gate C
2
MOS tech-
nology. They achieve the high speed operation
similar to equivalent LSTTL while maintaining the
CMOS low powerdissipation.
These devices consist of four 2-input digital multi-
plexerswith common select and strobe inputs. The
HCT158 is an inverting multiplexer while the
HCT157 is a non-inverting multiplexer. When the
STROBEinput is held High, selection of data is in-
hibited and all the outputs become Low in the
M74HCT157 and High intheM74HCT158. The SE-
LECT decoding determines whether the A or B in-
puts get routed to their corresponding Y outputs. All
inputs are equipped with protection circuits against
static discharge and transient excess voltage.
M54/74HCT devices are designed to directly inter-
faceHSC
2
MOS systemswith TTL andNMOScom-
ponents. They are also plug in replacements for
LSTTL devices giving a reduction of power con-
sumption.
1/11
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