M54HC237K [STMICROELECTRONICS]
RAD-HARD 3 TO 8 LINE DECODER LATCH; RAD - HARD 3至8线译码器LATCH
| 型号： | M54HC237K |
| 厂家： | 
ST |
| 描述： | RAD-HARD 3 TO 8 LINE DECODER LATCH |
| 文件： | 总10页 (文件大小：199K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54HC237
RAD-HARD 3 TO 8 LINE DECODER LATCH
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■
■
■
■
■
■
HIGH SPEED:
= 16ns (TYP.) at V
t
= 6V
CC
PD
LOW POWER DISSIPATION:
= 4µA(MAX.) at T =25°C
I
CC
A
HIGH NOISE IMMUNITY:
= V = 28% V (MIN.)
V
NIH
NIL
CC
DILC-16
FPC-16
SYMMETRICAL OUTPUT IMPEDANCE:
|I | = I = 4mA (MIN)
OH
OL
ORDER CODES
PACKAGE
BALANCED PROPAGATION DELAYS:
t
t
FM
EM
PLH
PHL
WIDE OPERATING VOLTAGE RANGE:
(OPR) = 2V to 6V
DILC
FPC
M54HC237D
M54HC237K
M54HC237D1
M54HC237K1
V
CC
PIN AND FUNCTION COMPATIBLE WITH
54 SERIES 237
SPACE GRADE-1: ESA SCC QUALIFIED
50 krad QUALIFIED, 100 krad AVAILABLE ON
REQUEST
NO SEL UNDER HIGH LET HEAVY IONS
IRRADIATION
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 independently of the select or
latch-enable inputs. All of the outputs are low
unless G1 is high and G2 is low. The M54HC237
is ideally suited for the implementation of
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■
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DEVICE FULLY COMPLIANT WITH
SCC-9205-021
glitch-free
decoders
in
stored-address
DESCRIPTION
applications in bus oriented systems.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
The M54HC237 is an high speed CMOS 3 TO 8
LINE DECODER fabricated with silicon gate
2
C MOS technology.
PIN CONNECTION
April 2004
1/10
M54HC237
IEC LOGIC SYMBOLS
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN N°
SYMBOL
NAME AND FUNCTION
1, 2, 3
A, B, C
GL
Data Inputs
4
5
Latch Enable Input
G2
Data Enable Input (Active
LOW)
6
G1
Data Enable Input (Active
HIGH)
15, 14, 13,
12, 11, 10, 9,
7
Y0 to Y7
Decoder Outputs
8
GND
Ground (0V)
16
V
Positive Supply Voltage
CC
TRUTH TABLE
INPUTS
OUTPUTS
ENABLE
G2
SELECT
B
GL
G1
C
A
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
X
L
L
L
L
L
L
L
L
H
X
H
L
L
L
L
L
L
L
L
L
L
X
X
L
X
X
L
X
X
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
H
X
H
H
H
H
H
H
H
H
H
L
L
H
L
L
H
H
L
L
H
L
H
H
H
H
X
L
H
L
H
H
X
H
X
Outputs corresponding to stored address H: all others L
X : Don’t Care
2/10
M54HC237
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
Supply Voltage
-0.5 to +7
V
V
CC
V
DC Input Voltage
-0.5 to V + 0.5
I
CC
V
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Current
-0.5 to V + 0.5
V
O
CC
I
± 20
± 20
mA
mA
mA
mA
mW
°C
IK
I
OK
I
± 25
O
I
or I
DC V
or Ground Current
CC
± 50
CC
GND
P
Power Dissipation
300
D
T
Storage Temperature
Lead Temperature (10 sec)
-65 to +150
265
stg
T
°C
L
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V
Supply Voltage
2 to 6
0 to V
V
V
CC
V
Input Voltage
I
CC
V
Output Voltage
0 to V
CC
V
O
T
Operating Temperature
Input Rise and Fall Time
-55 to 125
0 to 1000
0 to 500
0 to 400
°C
ns
ns
ns
op
V
V
V
= 2.0V
= 4.5V
= 6.0V
CC
CC
CC
t , t
r
f
3/10
M54HC237
DC SPECIFICATIONS
Test Condition
Value
T
= 25°C
Symbol
Parameter
-40 to 85°C -55 to 125°C Unit
A
V
CC
(V)
Min. Typ. Max. Min. Max. Min. Max.
V
High Level Input
Voltage
2.0
4.5
6.0
2.0
4.5
6.0
2.0
1.5
3.15
4.2
1.5
3.15
4.2
1.5
3.15
4.2
IH
V
V
V
Low Level Input
Voltage
0.5
1.35
1.8
0.5
1.35
1.8
0.5
1.35
1.8
IL
V
High Level Output
Voltage
I =-20 µA
1.9
4.4
5.9
2.0
4.5
6.0
1.9
4.4
1.9
4.4
OH
O
I =-20 µA
4.5
6.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
O
I =-20 µA
5.9
5.9
V
V
O
I =-4.0 mA
4.18 4.31
4.13
5.63
4.10
5.60
O
I =-5.2 mA
5.68
5.8
0.0
0.0
0.0
O
V
Low Level Output
Voltage
I =20 µA
0.1
0.1
0.1
0.1
0.1
0.1
0.1
OL
O
I =20 µA
O
I =20 µA
0.1
0.1
O
I =4.0 mA
0.17 0.26
0.18 0.26
0.33
0.33
0.40
0.40
O
I =5.2 mA
O
I
Input Leakage
Current
I
V = V or GND
6.0
6.0
± 0.1
± 1
± 1
µA
µA
I
CC
I
Quiescent Supply
Current
CC
V = V or GND
4
40
80
I
CC
4/10
M54HC237
AC ELECTRICAL CHARACTERISTICS (C = 50 pF, Input t = t = 6ns)
L
r
f
Test Condition
Value
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
T
= 25°C
Symbol
Parameter
A
V
CC
(V)
t
t
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
110
22
19
270
54
46
210
42
36
210
42
36
285
57
48
110
22
19
75
15
13
40
8
TLH THL
ns
ns
ns
ns
ns
ns
ns
ns
7
t
t
t
t
t
Propagation Delay
Time (A, B, C - Y)
60
19
16
45
15
13
45
15
13
65
21
18
10
6
PLH PHL
t
Propagation Delay
Time (G1 - Y)
PLH PHL
t
Propagation Delay
Time (G2 - Y)
PLH PHL
t
Propagation Delay
Time (GL - Y)
PLH PHL
t
Minimum Pulse
Width (GL)
W(L)
6
t
Minimum Set-up
Time (A, B, C - GL)
12
3
s
2
t
Minimum Hold
Time (A, B, C - GL)
25
5
30
6
h
5
5
7
CAPACITIVE CHARACTERISTICS
Test Condition
Value
-40 to 85°C -55 to 125°C Unit
T
= 25°C
Symbol
Parameter
A
V
CC
(V)
Min. Typ. Max. Min. Max. Min. Max.
C
Input Capacitance
5.0
5.0
5
10
10
10
pF
pF
IN
C
Power Dissipation
Capacitance (note 1)
PD
52
1) C is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
PD
load.
5/10
M54HC237
TEST CIRCUIT
C
R
= 50pF or equivalent (includes jig and probe capacitance)
L
T
= Z
of pulse generator (typically 50Ω)
OUT
WAVEFORM 1: PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)
6/10
M54HC237
WAVEFORM 2: SETUP AND HOLD TIME, MINIMUM PULSE WIDTH (GL)(f=1MHz; 50% duty cycle)
7/10
M54HC237
DILC-16 MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
TYP
MAX.
MIN.
MAX.
A
a1
a2
B
2.1
3.00
0.63
1.82
0.40
0.20
20.06
7.36
2.71
3.70
1.14
2.39
0.50
0.30
20.58
7.87
0.083
0.118
0.025
0.072
0.016
0.008
0.790
0.290
0.107
0.146
0.045
0.094
0.020
0.012
0.810
0.310
0.88
0.035
b
0.45
0.254
20.32
7.62
0.018
0.010
0.800
0.300
0.100
0.700
0.310
0.295
b1
D
e
e1
e2
e3
F
2.54
17.65
7.62
7.29
17.78
7.87
17.90
8.12
7.70
3.83
12.1
1.5
0.695
0.300
0.287
0.705
0.320
0.303
0.151
0.476
0.059
7.49
I
K
10.90
1.14
0.429
0.045
L
0056437F
8/10
M54HC237
FPC-16 MECHANICAL DATA
mm.
inch
TYP.
0.272
DIM.
MIN.
6.75
9.76
1.49
0.102
8.76
TYP
6.91
9.94
MAX.
7.06
MIN.
0.266
0.384
0.059
0.004
0.345
MAX.
0.278
0.399
0.077
0.006
0.355
A
B
C
D
E
F
10.14
1.95
0.392
0.127
8.89
1.27
0.43
0.152
9.01
0.005
0.350
0.050
0.017
G
H
L
0.38
6.0
0.48
0.015
0.237
0.738
0.013
0.019
18.75
0.33
22.0
0.43
0.867
0.017
M
N
0.38
4.31
0.015
0.170
G
D
F
H
16
9
A
N
L
1
8
H
M
E
B
C
0016030E
9/10
M54HC237
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its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
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10/10
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