PinoutSpecifications 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 ...
MC74HC138A: PinoutSpecifications 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 D...
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Features: Operating range: 38 to 47 Gb/s (min.) (note)Signal regeneration with full-rate clock sig...
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 DIP + SOIC Package+ TSSOP Package+ |
750 500 450 |
mW |
Tstg | Storage Temperature | -65to +150 | |
TL | Tead Temperature ,1mm form Case for 10 Seconds Plastic DIP , SOIC or TSSOP Package |
260 |
The MC74HC138A 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 HC138A decodes a threebit Address to oneofeight activelow outputs. This device features three Chip Select inputs, two activelow and one activehigh to facilitate the demultiplexing, cascading, and chipselecting functions. The demultiplexing function of MC74HC138A 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.