74HC138-Q100; 74HCT138-Q100
3-to-8 line decoder/demultiplexer; inverting
Rev. 2 — 26 January 2015
Product data sheet
1. General description
The 74HC138-Q100; 74HCT138-Q100 decodes three binary weighted address inputs
(A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three
enable inputs (E1, E2 and E3). Every output will be HIGH unless E1 and E2 are LOW and
E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to
32 lines) decoder with just four ‘138’ ICs and one inverter. The ‘138’ can be used as an
eight output demultiplexer by using one of the active LOW enable inputs as the data input
and the remaining enable inputs as strobes. Inputs include clamp diodes. This enables the
use of current limiting resistors to interface inputs to voltages in excess of VCC.
This product has been qualified to the Automotive Electronics Council (AEC) standard
Q100 (Grade 1) and is suitable for use in automotive applications.
2. Features and benefits
Automotive product qualification in accordance with AEC-Q100 (Grade 1)
Specified from 40 C to +85 C and from 40 C to +125 C
Complies with JEDEC standard no. 7A
Input levels:
For 74HC138-Q100: CMOS level
For 74HCT138-Q100: TTL level
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Active LOW mutually exclusive outputs
ESD protection:
MIL-STD-883, method 3015 exceeds 2000 V
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0 )
Multiple package options
74HC138-Q100; 74HCT138-Q100
NXP Semiconductors
3-to-8 line decoder/demultiplexer; inverting
3. Ordering information
Table 1.
Ordering information
Type number
Package
74HC138D-Q100
Temperature range
Name
Description
Version
40 C to +125 C
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
40 C to +125 C
TSSOP16
plastic thin shrink small outline package;
16 leads; body width 4.4 mm
SOT403-1
40 C to +125 C
DHVQFN16 plastic dual in-line compatible thermal enhanced SOT763-1
very thin quad flat package; no leads;
16 terminals; body 2.5 3.5 0.85 mm
74 HCT138D-Q100
74HC138PW-Q100
74HCT138PW-Q100
74HC138BQ-Q100
74HCT138BQ-Q100
4. Functional diagram
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