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

• Wide supply voltage range from 2.0 to 6.0 V

• CMOS low power dissipation

• High noise immunity

• Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

• Demultiplexing capability

• Multiple input enable for easy expansion

• Ideal for memory chip select decoding

• Active LOW mutually exclusive outputs

• Input levels:

• For 74HC138-Q100: CMOS level

• For 74HCT138-Q100: TTL level

• Complies with JEDEC standards:

• JESD8C (2.7 V to 3.6 V)

• JESD7A (2.0 V to 6.0 V)

• 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 Ω)

• Multiple package options

• DHVQFN package with Side-Wettable Flanks enabling Automatic Optical Inspection (AOI) of

solder joints