HEF4512B [NXP]
8-input multiplexer with 3-state output; 8输入多路复用器与3态输出
| 型号： | HEF4512B |
| 厂家： | 
NXP |
| 描述： | 8-input multiplexer with 3-state output |
| 文件： | 总8页 (文件大小：72K) |
| 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
HEF4512B
MSI
8-input multiplexer with 3-state
output
January 1995
Product specification
File under Integrated Circuits, IC04
Philips Semiconductors
Product specification
HEF4512B
MSI
8-input multiplexer with 3-state output
to interface directly with bus oriented systems (3-state).
When the active LOW enable (E) is HIGH, it forces the
output LOW provided EO is LOW. By proper manipulation
of the inputs, the device can provide any logic functions of
four variables. It cannot be used to multiplex analogue
signals.
DESCRIPTION
The HEF4512B is an 8-input multiplexer with 8 binary
inputs (I0 to I7), an enable input (E) and an output enable
input (EO). One of eight binary inputs is selected by select
inputs S0, S1 and S2, and is routed to the output O. A HIGH
on EO causes O to assume a high impedance OFF-state,
regardless of other input conditions. This allows the output
Fig.2 Pinning diagram.
HEF4512BP(N):
HEF4512BD(F):
HEF4512BT(D):
16-lead DIL; plastic
(SOT38-1)
16-lead DIL; ceramic (cerdip)
(SOT74)
16-lead SO; plastic
(SOT109-1)
Fig.1 Functional diagram.
( ): Package Designator North America
PINNING
S0, S1, S2
select inputs
EO
E
output enable (active LOW)
enable (active LOW)
multiplexer inputs
multiplexer output
I0 to I7
O
FAMILY DATA, IDD LIMITS category MSI
See Family Specifications
January 1995
2
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Fig.3 Logic diagram.
Philips Semiconductors
Product specification
HEF4512B
MSI
8-input multiplexer with 3-state output
TRUTH TABLE
INPUTS
OUTPUT
EO
E
S2
S1
S0
I0
I1
I2
I3
I4
I5
I6
I7
O
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
X
L
X
L
X
L
X
L
X
X
X
L
X
X
X
X
X
L
X
X
X
X
X
X
X
L
X
X
X
X
X
X
X
X
X
L
X
X
X
X
X
X
X
X
X
X
X
L
X
X
X
X
X
X
X
X
X
X
X
X
X
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
L
L
L
H
H
L
L
L
H
X
X
X
X
X
X
X
X
X
X
X
X
X
H
L
L
H
H
H
H
L
L
L
H
X
X
X
X
X
X
X
X
X
X
X
H
L
L
H
H
L
L
H
X
X
X
X
X
X
X
X
X
H
L
H
H
H
H
H
H
H
H
X
L
L
H
X
X
X
X
X
X
X
H
L
L
H
H
L
L
H
X
X
X
X
X
H
L
H
H
H
H
X
L
H
X
X
X
H
L
H
H
X
H
X
H
Z
Notes
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
Z = high impedance OFF-state
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
500 fi + ∑ (foCL) × VDD
where
2
10
15
2100 fi + ∑ (foCL) × VDD
fi = input freq. (MHz)
2
5800 fi + ∑ (foCL) × VDD
fo = output freq. (MHz)
CL = load capacitance (pF)
∑ (foCL) = sum of outputs
V
DD = supply voltage (V)
January 1995
4
Philips Semiconductors
Product specification
HEF4512B
MSI
8-input multiplexer with 3-state output
AC CHARACTERISTICS
VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times ≤ 20 ns
VDD
TYPICAL EXTRAPOLATION
FORMULA
SYMBOL TYP. MAX.
V
Propagation delays
In → O
5
10
15
5
100
40
30
100
40
30
140
55
40
150
60
40
60
25
20
55
25
20
60
30
20
60
30
20
200
80
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
73 ns
29 ns
22 ns
73 ns
29 ns
22 ns
113 ns
44 ns
32 ns
123 ns
49 ns
32 ns
33 ns
14 ns
12 ns
28 ns
14 ns
12 ns
10 ns
9 ns
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(0,55 ns/pF) CL
(0,23 ns/pF) CL
(0,16 ns/pF) CL
(1,0 ns/pF) CL
(0,42 ns/pF) CL
(0,28 ns/pF) CL
(1,0 ns/pf) CL
HIGH to LOW
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tTHL
tTLH
60
200
80
LOW to HIGH
10
15
5
60
Sn → O
280
110
80
HIGH to LOW
10
15
5
300
120
80
LOW to HIGH
10
15
5
E → O
120
50
HIGH to LOW
10
15
5
40
110
50
LOW to HIGH
10
15
5
40
Output transition times
HIGH to LOW
120
60
10
15
5
40
6 ns
120
60
10 ns
9 ns
LOW to HIGH
10
15
(0,42 ns/pF) CL
(0,28 ns/pF) CL
40
6 ns
3-state propagation delays
Output disable times
EO → O
5
10
15
5
35
20
15
35
15
10
70
40
30
70
30
20
ns
ns
ns
ns
ns
ns
HIGH
tPHZ
LOW
10
15
tPLZ
Output enable times
EO → O
5
10
15
35
15
10
70
30
20
ns
ns
ns
HIGH
tPZH
January 1995
5
Philips Semiconductors
Product specification
HEF4512B
MSI
8-input multiplexer with 3-state output
VDD
V
TYPICAL EXTRAPOLATION
FORMULA
SYMBOL TYP. MAX.
5
35
20
15
70
40
30
ns
ns
ns
LOW
10
15
tPZL
APPLICATION INFORMATION
Some examples of applications for the HEF4512B are:
• Signal gating
• Digital multiplexing
• Number sequence generation
January 1995
6
Philips Semiconductors
Product specification
HEF4512B
MSI
8-input multiplexer with 3-state output
TRUTH TABLE for Fig. 4
INPUT CONN.
TO OUTPUT
A4
A3
A2
A1
A0
L
L
L
L
L
L
L
L
L
H
L
0
1
2
L
L
L
H
H
L
via
IC
0
L
L
L
H
L
3
4
L
L
H
H
H
H
L
L
L
L
H
L
5
L
L
H
H
L
6
L
L
H
L
7
L
H
H
H
H
H
H
H
H
L
8
L
L
L
H
L
9
L
L
H
H
L
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
via
IC
1
L
L
H
L
L
H
H
H
H
L
L
L
H
L
L
H
H
L
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
H
L
L
L
H
H
L
via
IC
2
L
L
H
L
L
H
H
H
H
L
L
L
H
L
L
H
H
L
L
H
L
H
H
H
H
H
H
H
H
L
L
H
L
L
H
H
L
via
IC
3
L
H
L
H
H
H
H
Fig.4 32-input multiplexer using 4 × HEF4512B
and 1 × HEF4011B. The input is selected
by 5-bit address (A4 to A0) and presented at
the output.
L
H
L
H
H
H
January 1995
7
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