STMicroelectronics HCF4532BM1 8-bit priority encoder Datasheet

HCF4532B
8-BIT PRIORITY ENCODER
■
■
■
■
■
■
■
■
■
CONVERTS FROM 1 TO 8 TO INPUTS
BINARY
PROVIDES CASCADING FEATURE TO
HANDLE ANY NUMBER OF INPUTS
GROUP SELECT INDICATES ONE OR
MORE PRIORITY INPUTS
QUIESCENT CURRENT SPECIFIED UP TO
20V
STANDARDIZED SYMMETRICAL OUTPUT
CHARACTERISTICS
5V, 10V AND 15V PARAMETRIC RATINGS
INPUT LEAKAGE CURRENT
II = 100nA (MAX) AT VDD = 18V TA = 25°C
100% TESTED FOR QUIESCENT CURRENT
MEETS ALL REQUIREMENTS OF JEDEC
JESD13B "STANDARD SPECIFICATIONS
FOR DESCRIPTION OF B SERIES CMOS
DEVICES"
DESCRIPTION
HCF4532B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages.
HCF4532B consists of a combinational logic that
encodes the highest priority input (D7-D0) to a
3-bit binary code. The eight inputs, D7 through D0,
DIP
SOP
ORDER CODES
PACKAGE
TUBE
T&R
DIP
SOP
HCF4532BEY
HCF4532BM1
HCF4532M013TR
each have an assigned priority. D7 is the highest
priority and D0 is the lowest. The priority encoder
is inhibited when the chip enable input EI is low.
When EI is high, the binary representation of the
highest priority input appears on output lines
Q2-Q0, and the group select line GS is high to
indicate that priority inputs are present. The
enable out (EO) is high when no priority inputs are
present. If any input is high, EO is low and all
cascaded lower order stages are disabled.
PIN CONNECTION
May 2004
Rev. 2
1/13
HCF4532B
Figure 1: Input Equivalent Circuit
Table 1: Pin Description
PIN N°
10, 11, 12,
13, 1, 2, 3, 4
9, 7, 6
SYMBOL
NAME AND FUNCTION
D0 to D7
Data Inputs
5
Q0 to Q2
EI
Chip Enable Input
15
EO
Enable Output
14
GS
VSS
Group Select Line
8
16
VDD
Positive Supply Voltage
Data Output Lines
Negative Supply Voltage
Figure 2: Functional Diagram
Table 2: Truth Table
INPUTS
OUTPUTS
EI
D7
D6
D5
D4
D3
D2
D1
D0
GS
Q2
Q1
Q0
EO
L
H
H
H
H
H
H
H
H
H
X
L
H
L
L
L
L
L
L
L
X
L
X
H
L
L
L
L
L
L
X
L
X
X
H
L
L
L
L
L
X
L
X
X
X
H
L
L
L
L
X
L
X
X
X
X
H
L
L
L
X
L
X
X
X
X
X
H
L
L
X
L
X
X
X
X
X
X
H
L
X
L
X
X
X
X
X
X
X
H
L
L
H
H
H
H
H
H
H
H
L
L
H
H
H
H
L
L
L
L
L
L
H
H
L
L
H
H
L
L
L
L
H
L
H
L
H
L
H
L
L
H
L
L
L
L
L
L
L
L
X : Don’t Care
2/13
HCF4532B
Figure 3: Logic Diagram
Table 3: Absolute Maximum Ratings
Symbol
VDD
Parameter
Supply Voltage
Value
Unit
-0.5 to +22
V
VI
DC Input Voltage
-0.5 to VDD + 0.5
V
II
DC Input Current
± 10
mA
200
100
mW
mW
Top
Power Dissipation per Package
Power Dissipation per Output Transistor
Operating Temperature
-55 to +125
°C
Tstg
Storage Temperature
-65 to +150
°C
PD
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
All voltage values are referred to VSS pin voltage.
3/13
HCF4532B
Table 4: Recommended Operating Conditions
Symbol
VDD
Parameter
Supply Voltage
VI
Input Voltage
Top
Operating Temperature
Value
Unit
3 to 20
V
0 to VDD
V
-55 to 125
°C
Table 5: DC Specifications
Test Condition
Symbol
IL
VOH
VOL
VIH
VIL
IOH
IOL
II
CI
Parameter
Quiescent Current
High Level Output
Voltage
Low Level Output
Voltage
VI
(V)
0/5
0/10
0/15
0/20
0/5
0/10
0/15
5/0
10/0
15/0
High Level Input
Voltage
Low Level Input
Voltage
Output Drive
Current
Output Sink
Current
Input Leakage
Current
Input Capacitance
VO
(V)
0/5
0/5
0/10
0/15
0/5
0/10
0/15
0/18
0.5/4.5
1/9
1.5/13.5
4.5/0.5
9/1
13.5/1.5
2.5
4.6
9.5
13.5
0.4
0.5
1.5
Value
|IO| VDD
(µA) (V)
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
Any Input
Any Input
5
10
15
20
5
10
15
5
10
15
5
10
15
5
10
15
5
5
10
15
5
10
15
18
TA = 25°C
Min.
Typ.
Max.
0.04
0.04
0.04
0.08
5
10
20
100
4.95
9.95
14.95
-40 to 85°C
-55 to 125°C
Min.
Min.
150
300
600
3000
4.95
9.95
14.95
0.05
0.05
0.05
4.95
9.95
14.95
3.5
7
11
1.5
3
4
-3.2
-1
-2.6
-6.8
1
2.6
6.8
±0.1
5
7.5
0.05
0.05
0.05
1.5
3
4
-1.1
-0.36
-0.9
-2.4
0.36
0.9
2.4
The Noise Margin for both "1" and "0" level is: 1V min. with VDD=5V, 2V min. with VDD=10V, 2.5V min. with VDD=15V
4/13
V
V
1.5
3
4
±1
µA
V
3.5
7
11
-1.1
-0.36
-0.9
-2.4
0.36
0.9
2.4
±10-5
Max.
150
300
600
3000
0.05
0.05
0.05
3.5
7
11
-1.36
-0.44
-1.1
-3.0
0.44
1.1
3.0
Max.
Unit
V
mA
mA
±1
µA
pF
HCF4532B
Table 6: Dynamic Electrical Characteristics (Tamb = 25°C, CL = 50pF, RL = 200KΩ, tr = tf = 20 ns)
Test Condition
Symbol
Parameter
VDD (V)
tPLH tPHL Propagation Delay Time
(EI to EO, EI to GS)
tPLH tPHL Propagation Delay Time
(EI to Qm, Dn to GS)
tPLH tPHL Propagation Delay Time
(Dn to Qm)
tTLH tTHL Transition Time
5
10
15
5
10
15
5
10
15
5
10
15
Value (*)
Min.
Unit
Typ.
Max.
110
55
45
170
85
65
220
110
85
100
50
40
220
110
85
340
170
125
440
220
160
200
100
80
ns
ns
ns
ns
(*) Typical temperature coefficient for all VDD value is 0.3 %/°C.
TYPICAL APPLICATIONS
Figure 4: 16-Level Priority Encoder
5/13
HCF4532B
Figure 5: 0 To 9 Keyboard Encoder
Table 7: Truth Table
INPUTS
OUTPUTS
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
GS
Q3’
Q2’
Q1’
Q0
H
L
L
L
L
L
L
L
L
L
X
H
L
L
L
L
L
L
L
L
X
X
H
L
L
L
L
L
L
L
X
X
X
H
L
L
L
L
L
L
X
X
X
X
H
L
L
L
L
L
X
X
X
X
X
H
L
L
L
L
X
X
X
X
X
X
H
L
L
L
X
X
X
X
X
X
X
H
L
L
X
X
X
X
X
X
X
X
H
L
X
X
X
X
X
X
X
X
X
H
L
L
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
H
H
H
H
L
L
L
L
L
L
H
H
L
L
H
H
L
L
H
L
H
L
H
L
H
L
H
L
X : Don’t Care
6/13
HCF4532B
Figure 6: Digital To Analog Conversion
Figure 7: Test Circuit
CL = 50pF or equivalent (includes jig and probe capacitance)
RL = 200KΩ
RT = ZOUT of pulse generator (typically 50Ω)
7/13
HCF4532B
Figure 8: Waveform - Propagation Delay Times (f=1MHz; 50% duty cycle)
8/13
HCF4532B
Plastic DIP-16 (0.25) MECHANICAL DATA
mm.
inch
DIM.
MIN.
a1
0.51
B
0.77
TYP
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.030
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
17.78
0.700
F
7.1
0.280
I
5.1
0.201
L
Z
3.3
0.130
1.27
0.050
P001C
9/13
HCF4532B
SO-16 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.068
0.2
a2
MAX.
0.004
0.008
1.65
0.064
b
0.35
0.46
0.013
0.018
b1
0.19
0.25
0.007
0.010
C
0.5
0.019
c1
45˚ (typ.)
D
9.8
E
5.8
10
0.385
6.2
0.228
0.393
0.244
e
1.27
0.050
e3
8.89
0.350
F
3.8
4.0
0.149
0.157
G
4.6
5.3
0.181
0.208
L
0.5
1.27
0.019
0.050
M
S
0.62
8
0.024
˚ (max.)
PO13H
10/13
HCF4532B
Tape & Reel SO-16 MECHANICAL DATA
mm.
inch
DIM.
MIN.
A
TYP
MAX.
MIN.
330
MAX.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
TYP.
0.504
22.4
0.519
0.882
Ao
6.45
6.65
0.254
0.262
Bo
10.3
10.5
0.406
0.414
Ko
2.1
2.3
0.082
0.090
Po
3.9
4.1
0.153
0.161
P
7.9
8.1
0.311
0.319
11/13
HCF4532B
Table 8: Revision History
Date
Revision
07-May-2004
2
12/13
Description of Changes
Mistake Truth Table - Table 2 - Pag. 2
HCF4532B
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13/13
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