PinoutSpecificationsSupply voltage, VCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . 7 VInput voltage, VI. . . . . . . . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . . ................ . . 7 VOperating free-air temperature range, TA:SN54ALS27...
SN54ALS27A: PinoutSpecificationsSupply voltage, VCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . 7 VInput voltage, VI. . . . . . . . . . . . . . . . . . . . . . . . ...
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Features: PinoutSpecificationsDescriptionThe SN54/74LS147 and SN54/74LS148 are Priority Encoders. ...
PinoutDescriptionThe LS155 and LS156 are Dual 1-of-4 Decoder/Demultiplexers with common Address in...

SN54ALS27A and SN54AS27 contain three independent 3-input positive-NOR gates. They perform the Boolean functions Y = A</a>•B</a>•C</a> or Y = A + B + C</a> in positive logic.
The SN54ALS27A and SN54AS27 are characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS27A and SN74AS27 are characterized for operation from 0°C to 70°C.