M54HC148K1 [STMICROELECTRONICS]
RAD-HARD 8 TO 3 LINE PRIORITY ENCODER; RAD - HARD 8至3线优先编码器
| 型号： | M54HC148K1 |
| 厂家： | 
ST |
| 描述： | RAD-HARD 8 TO 3 LINE PRIORITY ENCODER |
| 文件： | 总10页 (文件大小：230K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
M54HC148
RAD-HARD 8 TO 3 LINE PRIORITY ENCODER
■
■
■
■
■
■
■
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
BALANCED PROPAGATION DELAYS:
t
t
ORDER CODES
PACKAGE
PLH
PHL
WIDE OPERATING VOLTAGE RANGE:
(OPR) = 2V to 6V
FM
EM
V
CC
DILC
FPC
M54HC148D
M54HC148K
M54HC148D1
M54HC148K1
PIN AND FUNCTION COMPATIBLE WITH
54 SERIES 148
■
■
SPACE GRADE-1: ESA SCC QUALIFIED
50 krad QUALIFIED, 100 krad AVAILABLE ON
REQUEST
NO SEL UNDER HIGH LET HEAVY IONS
IRRADIATION
The M54HC148 encodes eight data lines to
three-line (4-2-1) binary (octal). Cascading
circuitry (enable input EI and enable output EO)
has been provided to allow octal expansion
without the need for external circuitry. Data inputs
are active at the low logic level.
■
■
DEVICE FULLY COMPLIANT WITH
SCC-9410-017
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
DESCRIPTION
The M54HC148 is an high speed CMOS 8 TO 3
LINE PRIORITY ENCODER fabricated with
2
silicon gate C MOS technology.
PIN CONNECTION
March 2004
1/10
M54HC148
IEC LOGIC SYMBOLS
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN N°
SYMBOL
to A
NAME AND FUNCTION
Data Outputs
9, 7, 6
A
0
2
10, 11, 12,
0 to 7
Data Inputs
13, 1, 2, 3, 4
15
5
EO
EI
Enable Output
Enable Input
14
8
GS
Priority Flag Output
Ground (0V)
GND
16
V
Positive Supply Voltage
CC
TRUTH TABLE
INPUTS
OUTPUTS
E1
0
1
2
3
4
5
6
7
A2
A1
A0
GS
E0
H
L
L
L
L
L
L
L
L
L
X
H
X
X
X
X
X
X
X
L
X
H
X
X
X
X
X
X
L
X
H
X
X
X
X
X
L
X
H
X
X
X
X
L
X
H
X
X
X
L
X
H
X
X
L
X
H
X
L
X
H
L
H
H
L
H
H
L
H
H
L
H
H
L
L
L
L
L
L
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
L
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
L
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
L
H
H
H
H
H
H
X : Don’t Care
2/10
M54HC148
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
3/10
M54HC148
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
DC SPECIFICATIONS
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.
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
M54HC148
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
30
8
75
15
95
19
110
22
TLH THL
ns
ns
ns
ns
ns
ns
7
13
16
19
t
t
t
t
t
t
Propagation Delay
Time (In - A0, A1,
A2)
60
19
16
60
19
16
40
14
12
40
14
12
40
14
12
150
30
190
38
225
45
PLH PHL
26
32
38
t
Propagation Delay
Time (In - EO, GS)
150
30
190
38
225
45
PLH PHL
26
32
38
t
Propagation Delay
Time (EI -EO)
115
23
145
29
175
35
PLH PHL
20
25
30
t
Propagation Delay
Time (EI -GS)
115
23
145
29
175
35
PLH PHL
20
25
30
t
Propagation Delay
Time (EI - A0, A1,
A2)
115
23
145
29
175
35
PLH PHL
20
25
30
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
10
10
10
pF
pF
IN
C
Power Dissipation
Capacitance (note
1)
PD
5.0
60
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. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I
= C x V x f + I
CC(opr)
PD CC IN CC
5/10
M54HC148
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 TIMES,FOR INVERTING AND NON INVERTING OUTPUTS
(f=1MHz; 50% duty cycle)
6/10
M54HC148
TYPICAL APPLICATION
7/10
M54HC148
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
M54HC148
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
M54HC148
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consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
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
systems without express written approval of STMicroelectronics.
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