M54HC237 [STMICROELECTRONICS]
3 TO 8 LINE DECODER LATCH; 3至8线译码器LATCH
| 型号： | M54HC237 |
| 厂家： | 
ST |
| 描述： | 3 TO 8 LINE DECODER LATCH |
| 文件： | 总11页 (文件大小：259K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54HC237
M74HC237
3 TO 8 LINE DECODER LATCH
.
.
.
.
.
.
.
.
HIGH SPEED
tPD = 12 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
10 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
BALANCED PROPAGATION DELAYS
tPLH = tPHL
WIDE OPERATING VOLTAGE RANGE
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
VCC (OPR) = 2 V TO 6 V
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS237
ORDER CODES :
M54HC237F1R
M74HC237B1R
M74HC237M1R
M74HC237C1R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HC237 is a high speed CMOS 3 TO 8
LINE DECODER LATCH fabricated in silicon gate
C2MOS technology.
It has the same high speed performance of LSTTL
combined with true CMOS low power consumption.
When GL goes from low to high, the address present
at the select inputs (A, B, C) is stored in the latches.
As long as GL remains high no address changes will
be recognized. Output enable controls, G1 and G2
control the state of the outputs independantly of the
select or latch-enable inputs. All of the outputs are low
unless G1 is high and G2 is low. The ’HC237 is ideally
suited for the implementation of glitch-free decoders
in stored-address applications in bus oriented sys-
tems. All inputs are equipped with protection circuits
against static discharge and transient excess voltage.
NC =
No Internal
Connection
October 1992
1/11
M54/M74HC237
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1, 2, 3
4
SYMBOL
NAME AND FUNCTION
A, B, C
GL
Data Inputs
Latch Enable Input
(Active LOW)
5
6
G2
G1
Data Enable Input
(Active LOW)
Data Enable Input
(Active HIGH)
15, 14, 13,
12, 11, 10, 9,
7
Y0 to Y7
Decoder Outputs
8
GND
VCC
Ground (0V)
16
Positive Supply Voltage
IEC LOGIC SYMBOLS
TRUTH TABLE
INPUTS
OUTPUS
ENABLE
SELECT
GL
X
X
L
G2
X
H
L
G1
L
C
X
X
L
B
X
X
L
A
X
X
L
Y0
L
Y1
L
Y2
L
Y3
L
Y4
L
Y5
L
Y6
L
Y7
L
X
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
H
L
H
L
L
L
L
L
L
L
L
L
L
H
H
L
L
H
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
L
L
L
L
L
L
H
H
H
H
X
L
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
L
H
L
L
L
L
L
H
H
X
L
L
L
L
L
H
L
L
L
L
H
X
L
L
L
L
L
L
H
H
L
OUTPUT CORRESPONDING TO STORED ADDRESS, H: ALL OTHERS, L
X: Don’t Care
2/11
M54/M74HC237
LOGIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
VI
Parameter
Value
Unit
Supply Voltage
-0.5 to +7
V
DC Input Voltage
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
± 20
V
V
VO
DC Output Voltage
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
± 25
ICC or IGND DC VCC or Ground Current
± 50
PD
Tstg
TL
Power Dissipation
500 (*)
Storage Temperature
-65 to +150
Lead Temperature (10 sec)
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
3/11
M54/M74HC237
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
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=-4.0 mA 4.18 4.31
4.13
5.63
4.10
5.60
IO=-5.2 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= 4.0 mA
IO= 5.2 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
Current
ICC
Quiescent Supply 6.0 VI = VCC or GND
Current
4
40
80
4/11
M54/M74HC237
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Test Conditions
Value
-40 to 85 oC -55 to 125 oC
74HC 54HC
TA = 25 oC
54HC and 74HC
Symbol
Parameter
Unit
VCC
(V)
Min. Typ. Max. Min. Max. Min. Max.
tTLH
tTHL
Output Transition
Time
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
2.0
4.5
6.0
30
8
75
15
13
180
36
31
140
28
24
140
28
24
190
38
32
75
15
13
50
10
9
95
19
16
225
45
38
175
35
30
175
35
30
240
48
41
95
19
16
65
13
11
30
6
115
22
19
270
54
46
210
42
36
210
42
36
285
57
48
110
22
19
75
15
13
40
8
ns
ns
ns
ns
ns
ns
ns
ns
7
tPLH
tPHL
Propagation
Delay Time
(A, B, C - Y)
60
19
16
45
15
13
45
15
13
65
21
18
10
6
tPLH
tPHL
Propagation
Delay Time
(G1 - Y)
tPLH
tPHL
Propagation
Delay Time
(G2 - Y)
tPLH
tPHL
Propagation
Delay Time
(GL - Y)
tW(L)
Minimum Pulse
Width
(GL)
6
ts
Minimum Set-up
Time
(A, B, C - GL)
12
3
2
th
Minimum Hold
Time
(A, B, C - GL)
25
5
5
5
7
CIN
Input Capacitance
5
10
10
10
pF
pF
CPD (*) Power Dissipation
Capacitance
52
(*) CPD isdefined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
SWITCHING CHARACTERISTICS TEST WAVEFORM
5/11
M54/M74HC237
TEST CIRCUIT ICC (Opr.)
INPUTTRANSITION TIMEIS THE SAME AS THATINCASE OFSWITCHING CHARACTERISTICS TEST.
6 Line to 64 LineDecoder with Input Address Storage.
6/11
M54/M74HC237
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/M74HC237
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/M74HC237
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/M74HC237
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/M74HC237
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
11/11
相关型号：
M54HC237F1
HC/UH SERIES, OTHER DECODER/DRIVER, TRUE OUTPUT, CDIP16, FRIT SEALED, CERAMIC, DIP-16
STMICROELECTR
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