The 74LS148 ICs have an operating range of VCC from 4.5 V to 5.5 V. Maximum current consumption is 20 mA through Icc and 0.2 mA per input pin. And the maximum propagation delay is 15 ns. They can provide 0.4 mA at High Input and 8 mA at Low Input. They allow inputs and outputs up to VCC. The recommended operating VCC is 5 V.
Specification:
Operating Voltage Range4.5 V to 5.5 VPackageDIP−16Input Current0.2 mAPowering Current20 mAPropagation Delay15 nsTemperature Range-65 °C – 150 °C
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