M74HCT157 [STMICROELECTRONICS]
HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV); HCT157 QUAD 2通道多路复用器HCT158 QUAD 2通道多路复用器( INV )型号: | M74HCT157 |
厂家: | ST |
描述: | HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV) |
文件: | 总11页 (文件大小:252K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
M54HCT157/158
M74HCT157/158
HCT157 QUAD 2 CHANNEL MULTIPLEXER
HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV.)
.
.
.
.
.
.
.
HIGH SPEED
tPD = 21 ns (TYP.) AT VCC = 5 V
LOW POWER DISSIPATION
ICC = 4 µA (MAX.) AT TA = 25 °C
COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.) VIL = 0.8V (MAX)
OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
BALANCED PROPAGATION DELAYS
tPLH = tPHL
PIN AND FUNCTION COMPATIBLE
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
WITH 54/74LS157/158
ORDER CODES :
M54HCTXXXF1R
M74HCTXXXB1R
M74HCTXXXM1R
M74HCTXXXC1R
PIN CONNECTIONS (top view)
HCT157
DESCRIPTION
The M54/74HCT157 and the M54/74HCT158 are
high speed CMOS QUAD 2-CHANNEL MULTI-
PLEXERs fabricated with silicon gate C2MOS tech-
nology. They achieve the high speed operation
similar to equivalent LSTTL while maintaining the
CMOS low power dissipation.
These devices consist of four 2-input digital multi-
plexers with common select and strobe inputs. The
HCT158 is an inverting multiplexer while the
HCT157 is a non-inverting multiplexer. When the
STROBE input is held High, selection of data is in-
hibited and all the outputs become Low in the
M74HCT157 and High in theM74HCT158. 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-
face HSC2MOS systems with TTL and NMOS com-
ponents. They are also plug in replacements for
LSTTL devices giving a reduction of power con-
sumption.
HCT158
NC =
No Internal
Connection
April 1993
1/11
M54/M74HCT157 M54/M74HCT158
CHIP CARRIER
HCT157
HCT158
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION (for HCT157)
PIN DESCRIPTION (for HCT158)
PIN No
SYMBOL
NAME AND FUNCTION
PIN No
SYMBOL
NAME AND FUNCTION
1
SELECT
Common Data Select
Input
1
SELECT
Common Data Select
Input
2, 5, 11, 14
3, 6, 10, 13
1A to 4A
1B to 4B
Data Inputs From
Source A
2, 5, 11, 14
3, 6, 10, 13
1A to 4A
1B to 4B
Data Inputs From
Source A
Data Inputs From
Source B
Data Inputs From
Source B
4, 7, 9, 12
1Y to 4Y
STROBE
GND
Multiplexer Output
Strobe Input
4, 7, 9, 12
1Y to 4Y
STROBE
GND
Multiplexer Output
Strobe Input
15
8
15
8
Ground (0V)
Ground (0V)
16
VCC
Positive Supply Voltage
16
VCC
Positive Supply Voltage
2/11
M54/M74HCT157 M54/M74HCT158
TRUTH TABLE
INPUTS
OUTPUTS
STROBE
SELECT
A
X
L
B
X
X
X
L
Y (HCT157)
Y (HCT158)
H
L
L
L
X
L
L
L
H
H
L
L
H
X
X
H
L
H
H
H
L
L
H
H
X: DON’T CARE
IEC LOGIC SYMBOL
HCT157
HCT158
LOGIC DIAGRAM
HCT157
HCT158
3/11
M54/M74HCT157 M54/M74HCT158
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VI
Parameter
Value
-0.5 to +7
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
± 20
Unit
V
Supply Voltage
DC Input Voltage
DC Output Voltage
V
VO
V
IIK
DC Input Diode Current
mA
mA
mA
mA
mW
oC
IOK
DC Output Diode Current
± 20
IO
DC Output Source Sink Current Per Output Pin
± 25
ICC or IGND DC VCC or Ground Current
± 50
PD
Tstg
TL
Power Dissipation
500 (*)
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
300
oC
Absolute MaximumRatingsare those values beyond whichdamage tothe device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW: 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
VI
Parameter
Value
4.5 to 5.5
0 to VCC
0 to VCC
Unit
V
Supply Voltage
Input Voltage
Output Voltage
V
VO
V
Top
Operating Temperature: M54HC Series
M74HC Series
-55 to +125
-40 to +85
oC
oC
tr, tf
Input Rise and Fall Time (VCC = 4.5 to 5.5V)
0 to 500
ns
4/11
M54/M74HCT157 M54/M74HCT158
DC SPECIFICATIONS
Test Conditions
VCC
Value
TA = 25 oC
54HC and 74HC
Min. Typ. Max. Min. Max. Min. Max.
-40 to 85 oC -55 to 125 oC
Symbol
VIH
Parameter
Unit
V
74HC
54HC
(V)
High Level Input
Voltage
4.5
to
2.0
2.0
2.0
5.5
VIL
Low Level Input
Voltage
4.5
to
0.8
0.8
0.8
V
5.5
VOH
High Level
VI = IO=-20 µA
4.4
4.5
4.4
4.4
Output Voltage
VIH
or
VIL
4.5
V
V
IO=-4.0 mA 4.18 4.31
4.13
4.10
VOL
Low Level Output
Voltage
VI = IO= 20 µA
VIH
or
VIL
0.0
0.1
0.1
0.33
±1
0.1
0.4
±1
4.5
5.5
IO= 4.0 mA
0.17 0.26
II
Input Leakage
Current
VI = VCC or GND
±0.1
4
µA
µA
ICC
Quiescent Supply 5.5 VI = VCC or GND
Current
40
80
∆ICC
Additional worst
case supply
current
5.5
Per Input pin
VI = 0.5V or
VI = 2.4V
2.0
2.9
3.0
mA
Other Inputs at
VCC or GND
IO= 0
5/11
M54/M74HCT157 M54/M74HCT158
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Test Conditions
Value
TA = 25 oC
54HC and 74HC
-40 to 85 oC -55 to 125 oC
Symbol
Parameter
Unit
VCC
74HC
54HC
(V)
4.5
Min. Typ. Max. Min. Max. Min. Max.
tTLH
tTHL
tPLH
tPHL
Output Transition
Time
8
15
19
22
ns
ns
Propagation
Delay Time
(A, B - Y)
4.5
4.5
4.5
16
25
31
38
tPLH
tPHL
Propagation
Delay Time
(SELECT - Y)
19
17
30
27
10
38
34
10
45
41
10
ns
ns
tPLH
tPHL
Propagation
Delay Time
(STROBE - Y)
CIN
Input Capacitance
5
pF
pF
pF
CPD (*) Power Dissipation
Capacitance
HCT157
HCT158
50
60
(*) CPD isdefined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the followingequation. ICC(opr) = CPD • VCC • fIN + ICC/4 (per channel)
SWITCHING CHARACTERISTICS TEST CIR-
CUIT
TEST CIRCUIT ICC (Opr.)
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHINGCHARACTERISTICSTEST.
6/11
M54/M74HCT157 M54/M74HCT158
Plastic DIP16 (0.25) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
0.51
0.77
TYP.
MAX.
MIN.
0.020
0.030
MAX.
a1
B
b
1.65
0.065
0.5
0.020
0.010
b1
D
E
e
0.25
20
0.787
8.5
2.54
17.78
0.335
0.100
0.700
e3
F
7.1
5.1
0.280
0.201
I
L
3.3
0.130
Z
1.27
0.050
P001C
7/11
M54/M74HCT157 M54/M74HCT158
Ceramic DIP16/1 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
20
MIN.
MAX.
0.787
0.276
A
B
7
D
E
3.3
0.130
0.700
0.38
0.015
e3
F
17.78
2.29
0.4
2.79
0.55
1.52
0.31
1.27
10.3
8.05
5.08
0.090
0.016
0.046
0.009
0.020
0.110
0.022
0.060
0.012
0.050
0.406
0.317
0.200
G
H
L
1.17
0.22
0.51
M
N
P
7.8
0.307
Q
P053D
8/11
M54/M74HCT157 M54/M74HCT158
SO16 (Narrow) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
1.75
0.2
MIN.
MAX.
0.068
0.007
0.064
0.018
0.010
A
a1
a2
b
0.1
0.004
1.65
0.46
0.25
0.35
0.19
0.013
0.007
b1
C
0.5
0.019
c1
D
45° (typ.)
9.8
5.8
10
0.385
0.228
0.393
0.244
E
6.2
e
1.27
8.89
0.050
0.350
e3
F
3.8
4.6
0.5
4.0
5.3
0.149
0.181
0.019
0.157
0.208
0.050
0.024
G
L
1.27
0.62
M
S
8° (max.)
P013H
9/11
M54/M74HCT157 M54/M74HCT158
PLCC20 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
9.78
8.89
4.2
TYP.
MAX.
10.03
9.04
MIN.
0.385
0.350
0.165
MAX.
0.395
0.356
0.180
A
B
D
4.57
d1
d2
E
2.54
0.56
0.100
0.022
7.37
8.38
0.290
0.330
0.004
e
1.27
5.08
0.38
0.050
0.200
0.015
e3
F
G
0.101
M
M1
1.27
1.14
0.050
0.045
P027A
10/11
M54/M74HCT157 M54/M74HCT158
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproductsare notauthorized foruse ascritical componentsin life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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11/11
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