1. General description
The 74HC_HCT238_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 (E
1, E2 and E3). Every output is LOW 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 74HC_HCT238_Q100 ICs and one inverter. The
74HC_HCT238_Q100 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 that enable the use of current limiting resistors to interface
inputs to voltages in excess of V
CC
.
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
Input levels:
For 74HC238-Q100: CMOS level
For 74HCT238-Q100: TTL level
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Active HIGH mutually exclusive outputs
Multiple package options
Complies with JEDEC standard no. 7A
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 )
74HC238-Q100; 74HCT238-Q100
3-to-8 line decoder/demultiplexer
Rev. 1 — 19 February 2013 Product data sheet
