M74HC257 [STMICROELECTRONICS]
HC258QUAD 2CHANNEL MULTIPLEXER 3-STATE, INVERTING HC257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE; HC258QUAD 2路复用器3 -STATE ，反相HC257四路2通道多路复用器3 -STATE
| 型号： | M74HC257 |
| 厂家： | 
ST |
| 描述： | HC258QUAD 2CHANNEL MULTIPLEXER 3-STATE, INVERTING HC257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE |
| 文件： | 总12页 (文件大小：261K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54/M74HC257
M54/M74HC258
HC257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
HC258 QUAD 2 CHANNEL MULTIPLEXER (3-STATE, INVERTING)
.
.
.
.
.
.
.
.
HIGH SPEED
tPD = 10 ns (TYP.) at VCC = 5 V
LOW POWER DISSIPATION
ICC = 4 µA (MAX.) at TA = 25 °C
HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 6 mA (MIN.)
BALANCED PROPAGATION DELAYS
tPLH = tPHL
B1R
(Plastic Package)
F1R
(Ceramic Package)
WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V to 6 V
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS257/258
M1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R
M74HCXXXB1R
M74HCXXXM1R
M74HCXXXC1R
PIN CONNECTIONS (top view)
HC257
DESCRIPTION
The M54/74HC257 and the M54/74HC258 are high
speed CMOS MULTIPLEXERs fabricated with sili-
con gate C2MOS technology.
They have the same high speed performance of
LSTTL combined with true CMOS low power con-
sumption.
HC258
These IC’s are composed of an independent 2-
channelmultiplexer with commonSELECT and EN-
ABLE INPUT.
The M54/74HC258 is an inverting multiplexer while
the M54/74HC257 is a non-inverting multiplexer.
When the ENABLE INPUT is held ”High”, outputs of
both IC’sbecome high-impedance state. If SELECT
INPUT is held ”Low”, ”A” data is selected, when SE-
LECT INPUT is high ”H”, ”B” data is chosen.
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
October 1992
1/12
M54/M74HC257/258
INPUT AND OUTPUT EQUIVALENT CIRCUIT
CHIP CARRIER
HC257
HC258
NC = No Internal Connection
PIN DESCRIPTION (HC257)
PIN DESCRIPTION (HC258)
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, 14, 11 1A to 4A
3, 6, 13, 10 1B to 4B
Data Input From Source A
Data Inputs from Source B
2, 5, 14, 11 1A to 4A
3, 6, 13, 10 1B to 4B
Data Input From Source A
Data Inputs from Source B
4, 7, 12, 9
1Y to 4Y
3 State Multiplexer
Outputs
4, 7, 12, 9
1Y to 4Y
3 State Multiplexer
Outputs
15
OE
3 State Output Enable
Inputs (Active LOW)
15
OE
3 State Output Enable
Inputs (Active LOW)
8
GND
VCC
Ground (0V)
8
GND
VCC
Ground (0V)
16
Positive Supply Voltage
16
Positive Supply Voltage
2/12
M54/M74HC257/258
IEC LOGIC SYMBOL
HC257
HC258
LOGIC DIAGRAM
HC257
HC258
TRUTH TABLE
INPUTS
OUTPUTS
OE
H
L
SELECT
A
X
L
B
X
X
X
L
Y (257)
Y (258)
X
L
Z
L
Z
H
L
L
L
H
X
X
H
L
L
H
H
H
L
L
H
H
X = DON’T CARE Z = HIGH IMPEDANCE
3/12
M54/M74HC257/258
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
V
VO
DC Output Voltage
V
IIK
DC Input Diode Current
DC Output Diode Current
DC Output Source Sink Current Per Output Pin
mA
mA
mA
mA
mW
oC
IOK
± 20
IO
± 35
ICC or IGND DC VCC or Ground Current
± 70
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
2 to 6
Unit
V
Supply Voltage
Input Voltage
Output Voltage
0 to VCC
0 to VCC
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 = 2 V
VCC = 4.5 V
VCC = 6 V
0 to 1000
0 to 500
0 to 400
ns
4/12
M54/M74HC257/258
DC SPECIFICATIONS
Test Conditions
VCC
Value
-40 to 85 oC -55 to 125 oC
74HC 54HC
TA = 25 oC
54HC and 74HC
Symbol
Parameter
Unit
(V)
Min. Typ. Max. Min. Max. Min. Max.
VIH
High Level Input
Voltage
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
1.5
3.15
4.2
1.5
3.15
4.2
1.5
3.15
4.2
V
V
VIL
Low Level Input
Voltage
0.5
1.35
1.8
0.5
1.35
1.8
0.5
1.35
1.8
VOH
High Level
Output Voltage
1.9
4.4
5.9
2.0
4.5
6.0
1.9
4.4
1.9
4.4
VI =
VIH
or
IO=-20 µA
V
V
5.9
5.9
VIL
IO=-6.0 mA 4.18 4.31
4.13
5.63
4.10
5.60
IO=-7.8 mA 5.68
5.8
0.0
0.0
0.0
VOL
Low Level Output 2.0
Voltage
0.1
0.1
0.1
0.1
0.1
0.1
0.1
VI =
VIH
or
IO= 20 µA
4.5
6.0
4.5
6.0
0.1
0.1
VIL
IO= 6.0 mA
IO= 7.8 mA
0.17 0.26
0.18 0.26
±0.1
0.33
0.33
±1
0.40
0.40
±1
II
Input Leakage
6.0
VI = VCC or GND
µA
µA
µA
Current
IOZ
ICC
Output Leakage
6.0
VI = VIH or VIL
VO = VCC or GND
±0.5
±5
±10
Current
Quiescent Supply 6.0 VI = VCC or GND
Current
4
40
80
5/12
M54/M74HC257/258
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 CL
74HC
54HC
(V) (pF)
2.0
Min. Typ. Max. Min. Max. Min. Max.
tTLH
tTHL
Output Transition
Time
25
7
60
12
75
15
90
19
50
ns
ns
ns
ns
ns
ns
ns
ns
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
6
10
13
15
tPLH
tPHL
Propagation
Delay Time
(A, B - Y)
45
13
11
62
18
15
45
13
11
62
18
15
40
12
10
57
17
14
28
14
13
5
100
20
125
25
150
30
50
17
21
26
140
28
175
35
210
42
150
24
30
36
tPLH
tPHL
Propagation
Delay Time
(SELECT - Y)
100
20
125
25
150
30
50
17
21
26
140
28
175
35
210
42
150
24
30
36
tPZL
tPZH
Output Enable
Time
110
22
140
28
165
33
50 RL = 1 KΩ
150 RL = 1 KΩ
50 RL = 1 KΩ
19
24
28
150
30
190
38
225
45
26
32
38
tPLZ
tPHZ
Output Disable
Time
140
28
175
35
210
42
24
30
36
CIN
Input Capacitance
10
10
10
pF
pF
COUT
Output
Capacitance
10
CPD (*) Power Dissipation
Capacitance
47
pF
(*) 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)
6/12
M54/M74HC257/258
SWITCHING CHARACTERISTICS TEST WAVEFORM
TEST CIRCUIT ICC (Opr.)
CPD CALCULATION
CPD is to be calculated with the following
formula by using the measured value of
ICC (opr.) in the test circuit opposite.
I
CC (opr)
CPD
=
fIN × VCC
INPUT WAVEFORMIS THE SAME AS THAT IN CASE OF
SWITCHINGCHARACTERSISTICSTESt.
7/12
M54/M74HC257/258
Plastic DIP16 (0.25) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
TYP.
MAX.
MIN.
0.020
0.030
MAX.
a1
B
b
0.51
0.77
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
8/12
M54/M74HC257/258
Ceramic DIP16/1 MECHANICAL DATA
mm
inch
DIM.
MIN.
TYP.
MAX.
20
MIN.
TYP.
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
9/12
M54/M74HC257/258
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
10/12
M54/M74HC257/258
PLCC20 MECHANICAL DATA
mm
inch
DIM.
MIN.
9.78
8.89
4.2
TYP.
MAX.
10.03
9.04
MIN.
0.385
0.350
0.165
TYP.
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
11/12
M54/M74HC257/258
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
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
12/12
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