Features: • Output Drive Capability: 10 LSTTL Loads• Outputs Directly Interface to CMOS, NMOS and TTL• Operating Voltage Range: 2.0 to 6.0 V• Low Input Current: 1.0 A• High Noise Immunity Characteristic of CMOS Devices• In Compliance with the Requirements Define...
MC54HC138A: Features: • Output Drive Capability: 10 LSTTL Loads• Outputs Directly Interface to CMOS, NMOS and TTL• Operating Voltage Range: 2.0 to 6.0 V• Low Input Current: 1.0 A• ...
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PinoutDescriptionThe F373 contains eight D-type latches with 3-state output buffers. When the Latc...
PinoutDescriptionThe F374 consists of eight edge-triggered flip-flops with individual D-type input...
Symbol |
Parameter |
Value |
Unit |
VCC |
DC Supply Voltage (Referenced to GND) |
0.5 to +7.0 |
V |
Vin |
DC Input Voltage (Referenced to GND) |
0.5 to VCC +0.5 |
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 or Ceramic DIP† SOIC Package† TSSOP Package† |
750 500 450 |
mW |
Tstg |
Storage Temperature |
65 to + 150 |
|
TL |
Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP, SOIC or TSSOP Package) (Ceramic DIP) |
260 300 |
The MC54/74HC138A is identical in pinout to the LS138. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.
The MC54/74HC138A decodes a threebit Address to oneofeight activelow outputs. MC54/74HC138A features three Chip Select inputs, two activelow and one activehigh to facilitate the demultiplexing, cascading, and chipselecting 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.