TI CD74HCT147M High speed cmos logic 10-to-4 line priority encoder Datasheet

CD74HC147,
CD74HCT147
Data sheet acquired from Harris Semiconductor
SCHS149
High Speed CMOS Logic
10-to-4 Line Priority Encoder
September 1997
[ /Title
(CD74
HC147
,
CD74
HCT14
7)
/Subject
(High
Speed
CMOS
Logic
10-to-4
Line
Priority
Encode
r)
/Autho
r ()
/Keywords
(High
Speed
CMOS
Logic
10-to-4
Line
Priority
Encode
r, High
Speed
CMOS
Logic
10-to-4
Line
Priority
Features
Description
• Buffered Inputs and Outputs
The Harris CD74HC147and CD74HCT147 are high speed
silicon-gate CMOS devices and are pin-compatible with low
power Schottky TTL (LSTTL).
• Typical Propagation Delay: 13ns at VCC = 5V,
CL = 15pF, TA = 25oC
The CD74HC147 and CD74HCT147 9-input priority
encoders accept data from nine active LOW inputs (l1 to l9)
and provide binary representation on the four active LOW
inputs (Y0 to Y3). A priority is assigned to each input so that
when two or more inputs are simultaneously active, the input
with the highest priority is represented on the output, with
input line l9 having the highest priority.
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
These devices provide the 10-line to 4-line priority encoding
function by use of the implied decimal “zero”. The “zero” is
encoded when all nine data inputs are HIGH, forcing all four
outputs HIGH.
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
Ordering Information
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
PART NUMBER
TEMP. RANGE (oC)
PKG.
NO.
PACKAGE
CD74HC147E
-55 to 125
16 Ld PDIP
E16.3
CD74HCT147E
-55 to 125
16 Ld PDIP
E16.3
CD74HC147M
-55 to 125
16 Ld SOIC
M16.15
CD74HCT147M
-55 to 125
16 Ld SOIC
M16.15
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Wafer or die for this part number is available which meets all electrical specifications. Please contact your local sales office or
Harris customer service for ordering information.
Pinout
CD74HC147, CD74HCT147
(PDIP, SOIC)
TOP VIEW
I4 1
16 VCC
I5 2
15 NC
I6 3
14 Y3
I7 4
13 I3
I8 5
12 I2
Y2 6
11 I1
Y1 7
10 I9
9 Y0
GND 8
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© Harris Corporation 1997
1
File Number
1773.1
CD74HC147, CD74HCT147
Functional Diagram
I1
11
9
12
Y0
I2
13
I3
7
1
Y1
I4
2
I5
6
3
I6
Y2
4
I7
14
5
I8
Y3
10
I9
GND = 8
VCC = 16
TRUTH TABLE
INPUTS
OUTPUTS
I1
I2
I3
I4
I5
I6
I7
I8
I9
Y3
Y2
Y1
Y0
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
NOTE: H = High Logic Level, L = Low Logic Level, X = Don’t Care
2
CD74HC147, CD74HCT147
Absolute Maximum Ratings
Thermal Information
DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V
DC Input Diode Current, IIK
For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA
DC Output Diode Current, IOK
For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±20mA
DC Output Source or Sink Current per Output Pin, IO
For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±25mA
DC VCC or Ground Current, ICC or IGND . . . . . . . . . . . . . . . . . .±50mA
Thermal Resistance (Typical, Note 3)
θJA (oC/W)
PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
160
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150oC
Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC
(SOIC - Lead Tips Only)
Operating Conditions
Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC
Supply Voltage Range, VCC
HC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2V to 6V
HCT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V
DC Input or Output Voltage, VI, VO . . . . . . . . . . . . . . . . . 0V to VCC
Input Rise and Fall Time
2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000ns (Max)
4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500ns (Max)
6V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400ns (Max)
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
3. θJA is measured with the component mounted on an evaluation PC board in free air.
DC Electrical Specifications
TEST
CONDITIONS
PARAMETER
25oC
-40oC TO 85oC -55oC TO 125oC
SYMBOL
VI (V)
IO (mA)
VCC
(V)
VIH
-
-
2
1.5
-
-
1.5
4.5
3.15
-
-
3.15
-
3.15
-
V
6
4.2
-
-
4.2
-
4.2
-
V
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNITS
-
1.5
-
V
HC TYPES
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
CMOS Loads
VIL
VOH
-
VIH or VIL
High Level Output
Voltage
TTL Loads
Low Level Output
Voltage
CMOS Loads
VOL
VIH or VIL
Low Level Output
Voltage
TTL Loads
Input Leakage
Current
Quiescent Device
Current
-
2
-
-
0.5
-
0.5
-
0.5
V
4.5
-
-
1.35
-
1.35
-
1.35
V
6
-
-
1.8
-
1.8
-
1.8
V
-0.02
2
1.9
-
-
1.9
-
1.9
-
V
-0.02
4.5
4.4
-
-
4.4
-
4.4
-
V
-0.02
6
5.9
-
-
5.9
-
5.9
-
V
-
-
-
-
-
-
-
-
-
V
-4
4.5
3.98
-
-
3.84
-
3.7
-
V
-5.2
6
5.48
-
-
5.34
-
5.2
-
V
0.02
2
-
-
0.1
-
0.1
-
0.1
V
0.02
4.5
-
-
0.1
-
0.1
-
0.1
V
0.02
6
-
-
0.1
-
0.1
-
0.1
V
-
-
-
-
-
-
-
-
-
V
4
4.5
-
-
0.26
-
0.33
-
0.4
V
5.2
6
-
-
0.26
-
0.33
-
0.4
V
II
VCC or
GND
-
6
-
-
±0.1
-
±1
-
±1
µA
ICC
VCC or
GND
0
6
-
-
8
-
80
-
160
µA
3
CD74HC147, CD74HCT147
DC Electrical Specifications
(Continued)
TEST
CONDITIONS
SYMBOL
VI (V)
IO (mA)
High Level Input
Voltage
VIH
-
-
Low Level Input
Voltage
VIL
-
High Level Output
Voltage
CMOS Loads
VOH
VIH or VIL
PARAMETER
VCC
(V)
25oC
-40oC TO 85oC -55oC TO 125oC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNITS
4.5 to
5.5
2
-
-
2
-
2
-
V
-
4.5 to
5.5
-
-
0.8
-
0.8
-
0.8
V
-0.02
4.5
4.4
-
-
4.4
-
4.4
-
V
-4
4.5
3.98
-
-
3.84
-
3.7
-
V
0.02
4.5
-
-
0.1
-
0.1
-
0.1
V
4
4.5
-
-
0.26
-
0.33
-
0.4
V
±0.1
-
±1
-
±1
µA
HCT TYPES
High Level Output
Voltage
TTL Loads
Low Level Output
Voltage
CMOS Loads
VOL
VIH or VIL
Low Level Output
Voltage
TTL Loads
Input Leakage
Current
Quiescent Device
Current
Additional Quiescent
Device Current Per
Input Pin: 1 Unit Load
II
VCC and
GND
0
5.5
-
ICC
VCC or
GND
0
5.5
-
-
8
-
80
-
160
µA
∆ICC
VCC
-2.1
-
4.5 to
5.5
-
100
360
-
450
-
490
µA
NOTE: For dual-supply systems theoretical worst case (VI = 2.4V, VCC = 5.5V) specification is 1.8mA.
HCT Input Loading Table
INPUT
UNIT LOADS
I1, I2, I3, I6, I7
1.1
I4, I5, I8, I9
1.5
NOTE: Unit Load is ∆ICC limit specified in DC Electrical Table, e.g.,
360µA max at 25oC.
Switching Specifications Input tr, tf = 6ns
PARAMETER
25oC
-40oC TO 85oC -55oC TO 125oC
SYMBOL
TEST
CONDITIONS
VCC (V)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNITS
tPLH, tPHL
CL = 50pF
2
-
-
160
-
200
-
240
ns
4.5
-
-
32
-
40
-
48
ns
5
-
13
-
-
-
-
-
ns
6
-
-
27
-
34
-
41
ns
2
-
-
75
-
95
-
110
ns
4.5
-
-
15
-
19
-
22
ns
6
-
-
13
-
16
-
19
ns
-
-
-
10
-
10
-
10
pF
HC TYPES
Propagation Delay,
Input to Output (Figure 1)
Transition Times
(Figure 1)
Input Capacitance
tTLH, tTHL
CIN
CL = 50pF
-
4
CD74HC147, CD74HCT147
Switching Specifications Input tr, tf = 6ns
(Continued)
25oC
-40oC TO 85oC -55oC TO 125oC
SYMBOL
TEST
CONDITIONS
VCC (V)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNITS
CPD
-
5
-
32
-
-
-
-
-
pF
Propagation Delay,
Input to Output (Figure 2)
tPLH, tPHL
CL = 50pF
4.5
-
-
35
-
44
-
53
ns
5
-
14
-
-
-
-
-
ns
Transition Times (Figure 2)
tTLH, tTHL
CL = 50pF
4.5
-
-
15
-
19
-
22
ns
Input Capacitance
CIN
-
-
-
-
10
-
10
-
10
pF
Power Dissipation Capacitance
(Notes 4, 5)
CPD
-
5
-
42
-
-
-
-
-
pF
PARAMETER
Power Dissipation Capacitance
(Notes 4, 5)
HCT TYPES
NOTES:
4. CPD is used to determine the dynamic power consumption, per gate.
5. PD = VCC2 fi (CPD + CL) where fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage.
Test Circuits and Waveforms
tr = 6ns
tf = 6ns
INPUT
GND
tTLH
GND
tTHL
90%
50%
10%
INVERTING
OUTPUT
3V
2.7V
1.3V
0.3V
INPUT
tTHL
tPHL
tf = 6ns
tr = 6ns
VCC
90%
50%
10%
tTLH
90%
1.3V
10%
INVERTING
OUTPUT
tPLH
tPHL
FIGURE 6. HC AND HCU TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC
tPLH
FIGURE 7. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
5
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