Page 1
DATA SH EET
Product specification
File under Integrated Circuits, IC04
January 1995
INTEGRATED CIRCUITS
HEF4515B
MSI
1-of-16 decoder/demultiplexer with
input latches
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
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January 1995 2
Philips Semiconductors Product specification
1-of-16 decoder/demultiplexer with input latches
HEF4515B
MSI
DESCRIPTION
The HEF4515B is a 1-of-16 decoder/demultiplexer, having
four binary weighted address inputs (A0to A3), a latch
enable input (EL), and an active LOW enable input (E).
The 16 outputs (O0to O15) are mutually exclusive active
LOW. When EL is HIGH, the selected output is determined
by the data on An. When EL goes LOW, the last data
present at A
n
are stored in the latches and the outputs
remain stable. When E is LOW, the selected output,
determined by the contents of the latch, is LOW. At
E HIGH, all outputs are HIGH. The enable input (E) does
not affect the state of the latch. When the HEF4515B is
used as a demultiplexer, E is the data input and A0to
A3are the address inputs.
Fig.1 Functional diagram.
PINNING
A
0
to A
3
address inputs
E enable input (active LOW)
EL latch enable input
O0to O
15
outputs (active LOW)
Fig.2 Pinning diagram.
APPLICATION INFORMATION
Some examples of applications for the HEF4515B are:
• Digital multiplexing.
• Address decoding.
• Hexadecimal/BCD decoding.
FAMILY DATA, I
DD
LIMITS category MSI
See Family Specifications
HEF4515BP(N): 24-lead DIL; plastic
(SOT101-1)
HEF4515BD(F): 24-lead DIL; ceramic (cerdip)
(SOT94)
HEF4515BT(D): 24-lead SO; plastic
(SOT137-1)
( ): Package Designator North America
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January 1995 3
Philips Semiconductors Product specification
1-of-16 decoder/demultiplexer with input latches
HEF4515B
MSI
Fig.3 Logic diagram.
Fig.4 Logic diagram (one latch).
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January 1995 4
Philips Semiconductors Product specification
1-of-16 decoder/demultiplexer with input latches
HEF4515B
MSI
TRUTH TABLE
Notes
1. EL = HIGH; H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage); X = state is immaterial
AC CHARACTERISTICS
V
SS
= 0 V; T
amb
=25°C; CL= 50 pF; input transition times ≤ 20 ns
INPUTS OUTPUTS
EA0A1A2A3O0O1O2O3O4O5O6O7O8O9O10O11O12O13O14O
15
HXXXXHH H HH H H HHHHHHHHH
LLL LLLH H H H H H HHHHHHHHH
LHL LLHL H HH H H HHHHHHHHH
LLH LLHH L H H H H HHHHHHHHH
LHHLLHHH L H H H HHHHHHHHH
LLLHLHH H H L H H HHHHHHHHH
LHLHLHH H H H L H HHHHHHHHH
LLHHLHH H H H H L HHHHHHHHH
LHHHLHH H H H H H L HHHHHHHH
LLL LHHHH HH H H HLHHHHHHH
LHL LHHH H HH H H HHLHHHHHH
LLH LHHH H HH H H HHHLHHHHH
LHHLHHH H H H H H HHHHLHHHH
LLLHHHH H HH H H HHHHHLHHH
LHL HHHH H HH H H HHHHHHLHH
LLHHHHH H HHH H HHHHHHHLH
LHHHHHHH HHH H HHHHHHHHL
V
DD
V
SYMBOL TYP. MAX.
TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
An, EL → O
n
5 260 520 ns 233 ns + (0,55 ns/pF) C
L
HIGH to LOW 10 t
PHL
95 190 ns 84 ns + (0,23 ns/pF) C
L
15 65 130 ns 57 ns + (0,16 ns/pF) C
L
5 270 550 ns 243 ns + (0,55 ns/pF) C
L
LOW to HIGH 10 t
PLH
95 190 ns 84 ns + (0,23 ns/pF) C
L
15 65 130 ns 57 ns + (0,16 ns/pF) C
L
E → O
n
5 175 350 ns 148 ns + (0,55 ns/pF) C
L
HIGH to LOW 10 t
PHL
65 130 ns 54 ns + (0,23 ns/pF) C
L
15 45 90 ns 37 ns + (0,16 ns/pF) C
L
5 200 400 ns 173 ns + (0,55 ns/pF) C
L
LOW to HIGH 10 t
PLH
70 140 ns 59 ns + (0,23 ns/pF) C
L
15 50 100 ns 42 ns + (0,16 ns/pF) C
L
Page 5
January 1995 5
Philips Semiconductors Product specification
1-of-16 decoder/demultiplexer with input latches
HEF4515B
MSI
AC CHARACTERISTICS
V
SS
= 0 V; T
amb
=25°C; CL= 50 pF; input transition times ≤ 20 ns
V
DD
V
SYMBOL MIN. TYP. MAX.
TYPICAL EXTRAPOLATION
FORMULA
Output transition
times 5 90 180 ns 40 ns + (1,0 ns/pF) C
L
HIGH to LOW 10 t
THL
35 65 ns 14 ns + (0,42 ns/pF) C
L
15 25 50 ns 11 ns + (0,28 ns/pF) C
L
5 85 170 ns 35 ns + (1,0 ns/pf) C
L
LOW to HIGH 10 t
TLH
35 70 ns 14 ns + (0,42 ns/pF) C
L
15 25 50 ns 11 ns + (0,28 ns/pF) C
L
Set-up time 5 120 60 ns
see also waveforms
Fig.5
A
n
→ EL 10 t
su
40 20 ns
15 30 15 ns
Hold time 5 0 60 ns
A
n
→ EL 10 t
hold
020 ns
15 0 15 ns
Minimum EL pulse 5 120 60 ns
width; HIGH 10 t
WELH
40 20 ns
15 30 15 ns
V
DD
V
TYPICAL FORMULA FOR P (µW)
Dynamic power 5 1100 f
i
+∑(foCL) × V
DD
2
where
dissipation per 10 5500 f
i
+∑(foCL) × V
DD
2
fi= input freq. (MHz)
package (P) 15 16 000 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)
Page 6
January 1995 6
Philips Semiconductors Product specification
1-of-16 decoder/demultiplexer with input latches
HEF4515B
MSI
Fig.5 Waveforms showing minimum pulse width for EL, set-up and hold times for Anto EL. Set-up and hold
times are shown as positive values but may be specified as negative values.
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