KK74AC138
features three Chip Select inputs, two active-low and one active-high to facilitate the demultiplexing, cascading, and chipselecting functions. The demultiplexing function is acplished by using the Address inputs to select the desired device output; one of the Chip Selects is used as a data input while the other Chip Selects are held in their active states.
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 2.0 to 6.0 V
- Low Input Current: 1.0 µA; 0.1 µA @ 25°C
- High Noise Immunity Characteristic of CMOS Devices
- Outputs Source/Sink 24 m A
ORDERING INFORMATION KK74AC138N Plastic KK74AC138D SOIC TA = -40° to 85° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Inputs CS1 CS2 CS3 X X H X H X L X X H H H H PIN 16 =VCC PIN 8 = GND H H H H L L L L L L L L L L L L L L L L A2 A1 A0 X X X X X X X X X L L L L H H H H L L H H L L H H L H L H L H L H Outputs Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 H H H H H H H H H H H H H H H H H H H H H H H H L H H H H H H H H L...
