Page 1
DATA SH EET
Product specification
File under Integrated Circuits, IC04
January 1995
INTEGRATED CIRCUITS
HEF4078B
gates
8-input NOR gate
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
Page 2
January 1995 2
Philips Semiconductors Product specification
8-input NOR gate
HEF4078B
gates
DESCRIPTION
The HEF4078B provides the positive 8-input NOR
function. The outputs are fully buffered for highest noise
immunity and pattern insensitivity of output impedance.
Fig.1 Functional diagram.
HEF4078BP(N): 14-lead DIL; plastic
(SOT27-1)
HEF4078BD(F): 14-lead DIL; ceramic (cerdip)
(SOT73)
HEF4078BT(D): 14-lead SO; plastic
(SOT108-1)
( ): Package Designator North America
Fig.2 Pinning diagram.
Fig.3 Logic diagram.
FAMILY DATA,
I
DD
LIMITS category GATES
See Family Specifications
Page 3
January 1995 3
Philips Semiconductors Product specification
8-input NOR gate
HEF4078B
gates
AC CHARACTERISTICS
V
SS
=0V; T
amb
=25°C; CL= 50 pF; input transition times ≤ 20 ns
V
DD
V
SYMBOL TYP. MAX.
TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
In→ O
n
5 80 160 ns 53 ns + (0,55 ns/pF) C
L
HIGH to LOW 10 t
PHL
35 70 ns 24 ns + (0,23 ns/pF) C
L
15 25 50 ns 17 ns + (0,16 ns/pF) C
L
5 80 160 ns 53 ns + (0,55 ns/pF) C
L
LOW to HIGH 10 t
PLH
35 70 ns 24 ns + (0,23 ns/pF) C
L
15 25 50 ns 17 ns + (0,16 ns/pF) C
L
Output transition
times 5 60 120 ns 10 ns + (1,0 ns/pF) C
L
HIGH to LOW 10 t
THL
30 60 ns 9 ns + (0,42 ns/pF) C
L
15 20 40 ns 6 ns + (0,28 ns/pF) C
L
5 60 120 ns 10 ns + (1,0 ns/pF) C
L
LOW to HIGH 10 t
TLH
30 60 ns 9 ns + (0,42 ns/pF) C
L
15 20 40 ns 6 ns + (0,28 ns/pF) C
L
V
DD
V
TYPICAL FORMULA FOR P (µW)
Dynamic power 5 750 f
i
+∑(foCL) × V
DD
2
where
dissipation per 10 2800 f
i
+∑(foCL) × V
DD
2
fi= input freq. (MHz)
package (P) 15 7500 f
i
+∑(foCL) × V
DD
2
fo= output freq. (MHz)
C
L
= load capacitance (pF)
∑ (f
oCL
) = sum of outputs
V
DD
= supply voltage (V)
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