74HC138D NXP Semiconductors, 74HC138D Datasheet - Page 15

• Manufacturer Part Number: 74HC138D
• Description: Decoder/Demultiplexer Single 3-to-8 16-Pin SO Bulk
• Manufacturer: NXP Semiconductors

Specifications of 74HC138D

• Package: 16SO
• Logic Function: Decoder/Demultiplexer
• Logic Family: HC
• Number Of Element Outputs: 8
• Number Of Elements Per Chip: 1
• Number Of Input Enables Per Element: 3
• Demultiplexing Capability: 1-of-8
• Fabrication Technology: CMOS
• Typical Operating Supply Voltage: 5 V
• Operating Temperature: -40 to 125 °C

Philips Semiconductors
74HC_HCT138_3
Product data sheet
Table 12:
Type
74HC138
74HCT138
Fig 8. Load circuitry for measuring switching times
Test data is given in
Definitions test circuit:
R
C
R
S1 = Test selection switch
T
L
L
Test data
= Termination resistance should be equal to output impedance Z
= Load capacitance including jig and probe capacitance
= Load resistor
Input
V
V
3 V
I
CC
GENERATOR
PULSE
negative
positive
Rev. 03 — 23 December 2005
pulse
pulse
t
6 ns
6 ns
0 V
0 V
r
V
V
, t
Table
I
I
f
90 %
10 %
12.
V I
Load
C
15 pF, 50 pF 1 k
15 pF, 50 pF 1 k
t
t
L
f
r
V
V
M
M
R T
10 %
90 %
V
DUT
3-to-8 line decoder/demultiplexer; inverting
CC
74HC138; 74HCT138
R
t
t
W
W
L
V O
V
V
S1 position
t
open
open
PHL
M
M
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
C L
t
t
r
f
R L
, t
PLH
o
of the pulse generator
S1
001aad983
t
GND
GND
V
PZH
CC
open
, t
PHZ
t
V
V
PZL
CC
CC
, t
15 of 23
PLZ