74HC147.PDF

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10 TO 4 LINE PRIORITY ENCODER
M54HC147
M74HC147
. HIGH SPEED
t PD = 15 ns (TYP.) at V CC =5V
10 TO 4 LINE PRIORITY ENCODER
. HIGH NOISE IMMUNITY
V NIH =V NIL =28%V CC (MIN.)
I CC =4
A (MAX.) at T A =25
°
C
. OUTPUT DRIVE CAPABILITY
. SYMMETRICAL OUTPUT IMPEDANCE
z
10 LSTTL LOADS
B1R
(Plastic Package)
F1R
(Ceramic Package)
. BALANCED PROPAGATION DELAYS
. WIDE OPERATING VOLTAGE RANGE
V CC (OPR) = 2 V to 6 V
=I OL = 4 mA (MIN.)
t PLH =t PHL
. PIN AND FUNCTION COMPATIBLE
M1R
(Micro Package)
C1R
(Chip Carrier)
WITH 54/74LS147
ORDER CODES :
M54HC147F1R
M74HC147M1R
M74HC147B1R
M74HC147C1R
DESCRIPTION
The M54/74HC147 is a high speed CMOS 10 TO 4
LINE PRIORITY ENCODER fabricated in silicon
gate C 2 MOS technology. It has the same high
speed performance of LSTTL combined with true
CMOS low power consumption.
This device features priority encoding of the inputs
to ensure that only the highest order data line is en-
coded. Nine input lines are encoded to a four line
BCD output. The implied decimal zero condition re-
quires no input condition as zero is encoded when
all nine data lines are at high logic level. All data input
and outputs are active at the low logic level. All in-
puts are equipped with protection circuits against
static discharge and transient excess voltage.
PIN CONNECTIONS (top view)
INPUT AND OUTPUT EQUIVALENT CIRCUIT
NC =
No Internal
Connection
October 1992
1/10
. LOW POWER DISSIPATION
m
I OH z
284758647.002.png
M54/M74HC147
TRUTH TABLE
INPUTS
OUTPUTS
1
2
3
4
5
6
7
8
9
D
C
B
A
H
H
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
L
L
H
H
L
X
X
X
X
X
X
X
L
H
L
H
H
H
X
X
X
X
X
X
L
H
H
H
L
L
L
X
X
X
X
X
L
H
H
H
H
L
L
H
X
X
X
X
L
H
H
H
H
H
L
H
L
X
X
X
L
H
H
H
H
H
H
L
H
H
X
X
L
H
H
H
H
H
H
H
H
L
L
X
L
H
H
H
H
H
H
H
H
H
L
H
L
H
H
H
H
H
H
H
H
H
H
H
L
X: Don’t Care
LOGIC DIAGRAM
2/10
284758647.003.png
M54/M74HC147
PIN DESCRIPTION
IEC LOGIC SYMBOL
PIN No
SYMBOL
NAME AND FUNCTION
9, 7, 6, 14
A to D
BCD Address Outputs
(Active LOW)
11, 12, 13,
1, 2, 3, 4,
5, 10
1 to 9
Decimal Data Inputs
(Active LOW)
15
NC
Not Connected
8
GND
Ground (0V)
16
V CC
Positive Supply Voltage
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V CC
Supply Voltage
-0.5 to +7
V
V I
DC Input Voltage
-0.5 to V CC + 0.5
V
V O
DC Output Voltage
-0.5 to V CC + 0.5
V
I IK
DC Input Diode Current
±
20
mA
I OK
DC Output Diode Current
±
20
mA
I O
DC Output Source Sink Current Per Output Pin
±
25
mA
I CC or I GND DC V CC or Ground Current
±
50
mA
P D
Power Dissipation
500 (*)
mW
T stg
Storage Temperature
-65 to +150
o C
o C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
(*) 500 mW:
Lead Temperature (10 sec)
300
@
65 o C derate to 300 mW by 10mW/ o C: 65 o Cto85 o C
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
V CC
Supply Voltage
2 to 6
V
V I
Input Voltage
0 to V CC
V
V O
Output Voltage
0 to V CC
V
T op
Operating Temperature: M54HC Series
M74HC Series
-55 to +125
-40 to +85
o C
o
C
t r ,t f
Input Rise and Fall Time
V CC = 2 V
0 to 1000
ns
V CC = 4.5 V
0 to 500
V CC = 6 V
0 to 400
3/10
T L
284758647.004.png
M54/M74HC147
DC SPECIFICATIONS
Test Conditions
Value
Symbol
Parameter
V CC
(V)
-55 to 125 o C
54HC
Min. Typ. Max. Min. Max. Min. Max.
-40 to 85 o C
74HC
Unit
V IH
High Level Input
Voltage
2.0
1.5
1.5
1.5
V
4.5
3.15
3.15
3.15
6.0
4.2
4.2
4.2
V IL
Low Level Input
Voltage
2.0
0.5
0.5
0.5
4.5
1.35
1.35
1.35
V
6.0
1.8
1.8
1.8
V OH
High Level
Output Voltage
2.0
V I =
V IH
or
V IL
1.9
2.0
1.9
1.9
4.5
I O =-20
m
A
4.4
4.5
4.4
4.4
V
6.0
5.9
6.0
5.9
5.9
4.5
I O =-4.0 mA 4.18 4.31
4.13
4.10
6.0
I O =-5.2 mA 5.68
5.8
5.63
5.60
V OL
Low Level Output
Voltage
2.0
V I =
V IH
or
V IL
0.0
0.1
0.1
0.1
I O =20
m
A
4.5
0.0
0.1
0.1
0.1
V
6.0
0.0
0.1
0.1
0.1
4.5
I O = 4.0 mA
0.17 0.26
0.33
0.40
6.0
I O = 5.2 mA
0.18 0.26
0.33
0.40
I I
Input Leakage
Current
6.0
V I =V CC or GND
±
0.1
±
±
1
m
A
I CC
Quiescent Supply
Current
6.0 V I =V CC or GND
4
40
80
m
A
4/10
T A =25 o C
54HC and 74HC
1
284758647.005.png
M54/M74HC147
AC ELECTRICAL CHARACTERISTICS (C L =50pF,Inputt r =t f =6ns)
Test Conditions
Value
Symbol
Parameter
V CC
(V)
-55 to 125 o C
54HC
Min. Typ. Max. Min. Max. Min. Max.
-40 to 85 o C
74HC
Unit
t TLH
t THL
Output Transition
Time
2.0
30
75
95
110
4.5
8
15
19
22
ns
6.0
7
13
16
19
t PLH
t PHL
Propagation
Delay Time
2.0
60
125
190
225
4.5
18
30
38
45
ns
6.0
15
26
32
38
C IN
Input Capacitance
5
10
10
10
pF
C PD (*) Power Dissipation
Capacitance
24
pF
(*) C PD is defined 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 following equation. I CC (opr) = C PD
•
V CC
f IN +I CC
SWITCHING CHARACTERISTICS TEST
CIRCUIT
TEST CIRCUIT I CC (Opr.)
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICS TEST.
5/10
T A =25 o C
54HC and 74HC
•
284758647.001.png

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