Features: • Outputs Directly Interface to CMOS, NMOS, and TTL• Operating Voltage Range: 2.0 to 6.0 V• Low Input Current: 1.0 A; 0.1 A @ 25°C• High Noise Immunity Characteristic of CMOS Devices• Outputs Source/Sink 24 mAPinoutSpecifications Symbol Parameter ...
KK74AC138: Features: • Outputs Directly Interface to CMOS, NMOS, and TTL• Operating Voltage Range: 2.0 to 6.0 V• Low Input Current: 1.0 A; 0.1 A @ 25°C• High Noise Immunity Characterist...
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Symbol |
Parameter |
Value |
Unit |
VCC |
DC Supply Voltage (Referenced to GND) |
-0.5 to +20 |
V |
VIN |
DC Input Voltage (Referenced to GND) |
-1.5 to VCC +1.5 |
V |
VOUT |
DC Output Voltage (Referenced to GND) |
-0.5 to VCC +0.5 |
V |
IIN |
DC Input Current, per Pin |
±20 |
mA |
IOUT |
DC Output Current, per Pin |
±25 |
mA |
ICC |
DC Supply Current, VCC and GND Pins |
±50 |
mA |
PD |
Power Dissipation in Still Air, Plastic DIP, SOIC Package |
750 500 |
mW |
Tstg |
Storage Temperature |
-65 to +150 |
|
TL |
Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP or SOIC Package) |
260 |
|
The KK74AC138 is identical in pinout to the LS/ALS138, HC/HCT138. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LS/ALS outputs. The KK74AC138 decodes a three-bit Address to one-of-eight active-low outputs. This device features three Chip Select inputs, two active-low and one active-high to facilitate the demultiplexing, cascading, and chip-selecting functions. The demultiplexing function is accomplished 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.