HEF4532BN [NXP]
8-input priority encoder; 8输入优先编码器
| 型号： | HEF4532BN |
| 厂家： | 
NXP |
| 描述： | 8-input priority encoder |
| 文件： | 总8页 (文件大小：103K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
• The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
• The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
HEF4532B
MSI
8-input priority encoder
January 1995
Product specification
File under Integrated Circuits, IC04
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
corresponding to the highest priority input (I0 to I7) which is
HIGH, is generated on O0 to O2 if Ein is HIGH. Input I7 is
assigned the highest priority.
GS is HIGH when one or more priority inputs and Ein are
HIGH. Eout is HIGH when I0 to I7 are LOW and Ein is HIGH.
DESCRIPTION
The HEF4532B is an 8-input priority encoder with eight
active HIGH priority inputs (I0 to I7), three active HIGH
outputs (O0 to O2), an active HIGH enable input (Ein), an
active HIGH enable output (Eout) and an active HIGH
group select output (GS).
Ein, when LOW, forces all outputs (O0 to O2, GS, Eout
LOW.
)
Data is accepted on inputs I0 to I7. The binary code
HEF4532BP(N): 16-lead DIL; plastic
(SOT38-1)
HEF4532BD(F): 16-lead DIL; ceramic (cerdip)
(SOT74)
HEF4532BT(D): 16-lead SO; plastic
(SOT109-1)
( ): Package Designator North America
Fig.1 Functional diagram.
PINNING
I0 to I7
Ein
priority inputs
enable input
enable output
group select output
outputs
Eout
GS
O0 to O2
FAMILY DATA, IDD LIMITS category MSI
See Family Specifications
Fig.2 Pinning diagram.
January 1995
2
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Fig.3 Logic diagram.
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
TRUTH TABLE
INPUTS
OUTPUTS
Ein
I7
I6
I5
I4
I3
I2
I1
I0
GS
O2
O1
O0
Eout
L
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
L
X
L
X
L
X
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
X
X
X
H
L
X
X
X
X
H
L
X
X
X
X
X
H
L
X
X
X
X
X
X
H
L
X
X
X
X
X
X
X
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
L
H
L
H
L
L
H
H
L
H
L
L
L
L
L
L
H
L
L
L
L
L
L
Notes
1. H = HIGH state (the more positive voltage)
2. L = LOW state (the less positive voltage)
3. X = state is immaterial
LOGIC EQUATIONS
O2 = Ein (I4 + I5 + I6 + I7)
O1 = Ein (I2 I4 I5 + I3 I4 I5 + I6 + I7)
O0 = Ein (I1 I2 I4 I6 + I3 I4 I6 + I5 I6 + I7)
Eout = Ein I0 I1 I2 I3 I4 I5 I6 I7
GS = Ein (I0 + I1 + I2 + I3 + I4 + I5 + I6 + I7)
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; input transition times ≤ 20 ns
VDD
V
TYPICAL FORMULA FOR P (µW)
2
Dynamic power
dissipation per
package (P)
5
1 620 fi + ∑ (foCL) × VDD
where
2
10
15
6 600 fi + ∑ (foCL) × VDD
fi = input freq. (MHz)
fo = output freq. (MHz)
2
15 970 fi + ∑ (foCL) × VDD
CL = load capacitance (pF)
∑ (foCL) = sum of outputs
VDD = supply voltage (V)
January 1995
4
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns; see also waveforms Fig.4
VDD
V
TYPICAL EXTRAPOLATION
FORMULA
SYMBOL MIN. TYP. MAX.
Propagation delays
E
E
E
in → Eout
5
95
45
35
80
35
30
85
45
35
80
40
30
80
40
30
85
40
30
115
50
35
115
50
35
115
50
40
115
50
40
60
30
20
60
30
20
190
90
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
68 ns + (0,55 ns/pF) CL
34 ns + (0,23 ns/pF) CL
27 ns + (0,16 ns/pF) CL
53 ns + (0,55 ns/pF) CL
24 ns + (0,23 ns/pF) CL
22 ns + (0,16 ns/pF) CL
58 ns + (0,55 ns/pF) CL
34 ns + (0,23 ns/pF) CL
27 ns + (0,16 ns/pF) CL
53 ns + (0,55 ns/pF) CL
29 ns + (0,23 ns/pF) CL
22 ns + (0,16 ns/pF) CL
53 ns + (0,55 ns/pF) CL
29 ns + (0,23 ns/pF) CL
22 ns + (0,16 ns/pF) CL
58 ns + (0,55 ns/pF) CL
29 ns + (0,23 ns/pF) CL
22 ns + (0,16 ns/pF) CL
88 ns + (0,55 ns/pF) CL
39 ns + (0,23 ns/pF) CL
27 ns + (0,16 ns/pF) CL
88 ns + (0,55 ns/pF) CL
39 ns + (0,23 ns/pF) CL
27 ns + (0,16 ns/pF) CL
88 ns + (0,55 ns/pF) CL
39 ns + (0,23 ns/pF) CL
32 ns + (0,16 ns/pF) CL
88 ns + (0,55 ns/pF) CL
39 ns + (0,23 ns/pF) CL
32 ns + (0,16 ns/pF) CL
10 ns + (1,0 ns/pF) CL
9 ns + (0,42 ns/pF) CL
6 ns + (0,28 ns/pF) CL
10 ns + (1,0 ns/pF) CL
9 ns + (0,42 ns/pF) CL
6 ns + (0,28 ns/pF) CL
HIGH to LOW
10
15
5
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tTHL
tTLH
70
160
70
LOW to HIGH
10
15
5
60
in → GS
170
90
HIGH to LOW
10
15
5
70
160
80
LOW to HIGH
10
15
5
60
in → On
160
80
HIGH to LOW
10
15
5
60
170
80
LOW to HIGH
10
15
5
60
In → On
HIGH to LOW
230
100
70
10
15
5
230
100
70
LOW to HIGH
10
15
5
In → GS
230
100
80
HIGH to LOW
10
15
5
230
100
80
LOW to HIGH
10
15
5
Output transition
times
120
60
10
15
5
HIGH to LOW
40
120
60
LOW to HIGH
10
15
40
January 1995
5
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
Fig.4 Waveforms showing propagation delays from inputs to outputs.
January 1995
6
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
APPLICATION INFORMATION
Some examples of applications for the HEF4532B are:
• Priority encoder
• Keyboard encoder
Fig.5 16-level priority encoder.
January 1995
7
Philips Semiconductors
Product specification
HEF4532B
MSI
8-input priority encoder
Fig.6 0-to-9 keyboard encoder.
TRUTH TABLE (for Fig.6)
INPUTS
OUTPUTS
O’2
9
8
7
6
5
4
3
2
1
0
GS
O’3
O’1
O’0
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
X
X
X
X
X
H
L
X
X
X
X
X
X
H
L
X
X
X
X
X
X
X
H
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
L
L
L
L
L
L
L
L
L
L
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
L
H
L
H
L
L
L
H
H
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
Notes
1. H = HIGH state (the more positive voltage)
2. L = LOW state (the less positive voltage)
3. X = state is immaterial
January 1995
8
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