General description
The 74LVC138A-Q100 is a 3-to-8 line decoder/demultiplexer. It accepts three binary
weighted address inputs (A0, A1 and A2). When the inputs are enabled, it provides eight
mutually exclusive outputs (Y0 to Y7) that are LOW when selected.
There are three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3).
Every output is HIGH unless E1 and E2 are LOW and E3 is HIGH.
This multiple enable function allows easy parallel expansion of the device to a 1-of-32
(5 lines to 32 lines) decoder with just four 74LVC138A-Q100 devices and one inverter.
The 74LVC138A-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.
Unused enable inputs must be permanently tied to their appropriate active HIGH or LOW
state.
This product has been qualified to the Automotive Electronics Council (AEC) standard
Q100 (Grade 1) and is suitable for use in automotive applications.
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
 5 V tolerant inputs for interfacing with 5 V logic
 Wide supply voltage range from 1.2 V to 3.6 V
 CMOS low power consumption
 Direct interface with TTL levels
 Demultiplexing capability
 Multiple input enable for easy expansion
 Ideal for memory chip select decoding
 Mutually exclusive outputs
 Output drive capability 50  transmission lines at 125 C
 Complies with JEDEC standard:
 JESD8-7A (1.65 V to 1.95 V)
 JESD8-5A (2.3 V to 2.7 V)
 JESD8-C/JESD36 (2.7 V to 3.6 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 )
 Multiple package options