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INTEGRATED CIRCUITS
DATA SH EET
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
Product specification
File under Integrated Circuits, IC04
January 1995
Page 2
Philips Semiconductors Product specification
8-input multiplexer with 3-state output
DESCRIPTION
The HEF4512B is an 8-input multiplexer with 8 binary
inputs (I0to I7), an enable input (E) and an output enable
input (EO). One of eight binary inputs is selected by select
inputs S0, S1and 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
HEF4512B
MSI
to interface directly with bus oriented systems (3-state).
When the active LOW enable (
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.
E) is HIGH, it forces the
Fig.1 Functional diagram.
PINNING
, S
S
0,S1
EO output enable (active LOW)
E enable (active LOW)
I
to I
0
7
O multiplexer output
FAMILY DATA, I
See Family Specifications
select inputs
2
multiplexer inputs
DD
LIMITS category MSI
Fig.2 Pinning diagram.
HEF4512BP(N): 16-lead DIL; plastic
(SOT38-1)
HEF4512BD(F): 16-lead DIL; ceramic (cerdip)
(SOT74)
HEF4512BT(D): 16-lead SO; plastic
(SOT109-1)
( ): Package Designator North America
January 1995 2
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January 1995 3
Philips Semiconductors Product specification
8-input multiplexer with 3-state output
Fig.3 Logic diagram.
HEF4512B
MSI
Page 4
Philips Semiconductors Product specification
8-input multiplexer with 3-state output
HEF4512B
MSI
TRUTH TABLE
INPUTS OUTPUT
EO ES
LHX X X X X X X X X X X L
LLL L L LX X XXX X X L
LLL L L HX X X XX X X H
LLL L H XL X XXX X X L
LLL L H XH X X XX X X H
LLLH L XX L XXX X X L
LLLH L XX H X XX X X H
LLLH H XX X L XX X X L
LLLH H XX X HXX X X H
LLH L L XX X X LX X X L
LLH L L XX X X HX X X H
LLH L H XX X X X L X X L
LLH L H XX X X XH X X H
LLHH L XX X X XX L X L
LLHH L XX X X XX H X H
LLHH H XX X X XX X L L
LLHH H XX X X XX X H H
HXX X X X X X X X X X X Z
2
S
1
S
0
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
O
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
V
SS
= 0 V; T
=25°C; input transition times ≤ 20 ns
amb
V
DD
V
TYPICAL FORMULA FOR P (µW)
Dynamic power 5 500 f
dissipation per 10 2100 f
package (P) 15 5800 f
+∑(foCL) × V
i
+∑(foCL) × V
i
+∑(foCL) × V
i
DD
DD
DD
2
2
2
where
fi= input freq. (MHz)
fo= output freq. (MHz)
C
= load capacitance (pF)
L
∑ (f
) = sum of outputs
oCL
V
= supply voltage (V)
DD
January 1995 4
Page 5
Philips Semiconductors Product specification
8-input multiplexer with 3-state output
HEF4512B
AC CHARACTERISTICS
V
= 0 V; T
SS
Propagation delays
In→ O 5 100 200 ns 73 ns + (0,55 ns/pF) C
HIGH to LOW 10 t
LOW to HIGH 10 t
Sn→ O 5 140 280 ns 113 ns + (0,55 ns/pF) C
HIGH to LOW 10 t
LOW to HIGH 10 t
E → O 5 60 120 ns 33 ns + (0,55 ns/pF) C
HIGH to LOW 10 t
LOW to HIGH 10 t
Output transition times 5 60 120 ns 10 ns + (1,0 ns/pF) C
HIGH to LOW 10 t
LOW to HIGH 10 t
3-state propagation delays
Output disable times
EO → O 5 35 70 ns
HIGH 10 t
LOW 10 t
Output enable times
EO → O 5 35 70 ns
HIGH 10 t
=25°C; CL= 50 pF; input transition times ≤ 20 ns
amb
V
DD
V
SYMBOL TYP. MAX.
PHL
15 30 60 ns 22 ns + (0,16 ns/pF) C
5 100 200 ns 73 ns + (0,55 ns/pF) C
PLH
15 30 60 ns 22 ns + (0,16 ns/pF) C
PHL
15 40 80 ns 32 ns + (0,16 ns/pF) C
5 150 300 ns 123 ns + (0,55 ns/pF) C
PLH
15 40 80 ns 32 ns + (0,16 ns/pF) C
PHL
15 20 40 ns 12 ns + (0,16 ns/pF) C
5 55 110 ns 28 ns + (0,55 ns/pF) C
PLH
15 20 40 ns 12 ns + (0,16 ns/pF) C
THL
15 20 40 ns 6 ns + (0,28 ns/pF) C
5 60 120 ns 10 ns + (1,0 ns/pf) C
TLH
15 20 40 ns 6 ns + (0,28 ns/pF) C
PHZ
15 15 30 ns
53570ns
PLZ
15 10 20 ns
PZH
15 10 20 ns
TYPICAL EXTRAPOLATION
FORMULA
40 80 ns 29 ns + (0,23 ns/pF) C
40 80 ns 29 ns + (0,23 ns/pF) C
55 110 ns 44 ns + (0,23 ns/pF) C
60 120 ns 49 ns + (0,23 ns/pF) C
25 50 ns 14 ns + (0,23 ns/pF) C
25 50 ns 14 ns + (0,23 ns/pF) C
30 60 ns 9 ns + (0,42 ns/pF) C
30 60 ns 9 ns + (0,42 ns/pF) C
20 40 ns
15 30 ns
15 30 ns
MSI
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
January 1995 5
Page 6
Philips Semiconductors Product specification
8-input multiplexer with 3-state output
V
DD
V
LOW 10 t
15 15 30 ns
APPLICATION INFORMATION
Some examples of applications for the HEF4512B are:
• Signal gating
• Digital multiplexing
• Number sequence generation
SYMBOL TYP. MAX.
53570ns
PZL
HEF4512B
MSI
TYPICAL EXTRAPOLATION
FORMULA
20 40 ns
January 1995 6
Page 7
Philips Semiconductors Product specification
8-input multiplexer with 3-state output
TRUTH TABLE for Fig. 4
A
HLLLL16
HLLLH17
HLLHL 18
HLLHH19
HLHLL 20
HLHLH21
HLHHL22
HLHHH23
HHLL L 24
HHLLH25
HHLHL 26
HHLHH 27
HHHL L 28
HHHLH 29
HHHHL 30
HHHHH 31
A
4
LLLLL 0
LLLLH 1
LLLHL 2
LLLHH 3
LLHLL 4
LLHLH 5
LLHHL 6
LLHHH 7
LHLLL 8
LHLLH 9
LHLHL 10
LHLHH11
LHHLL 12
LHHLH13
LHHHL 14
LHHHH15
A
3
A
2
1
INPUT CONN.
A
0
TO OUTPUT
via
IC
0
via
IC
1
via
IC
2
via
IC
3
HEF4512B
MSI
Fig.4 32-input multiplexer using 4 × HEF4512B
and 1 × HEF4011B. The input is selected
by 5-bit address (A4to A0) and presented at
the output.
January 1995 7
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