These monolithic quadruple two-input multiplexers with storage provide
essentially the equivalent functional capabilities of two separate MSI functions
(SN54157/SN74157 or SN54LS157/SN74LS157 and SN54175/SN74175 or SN54LS175/SN74LS175)
in a single 16-pin package.
When the word-select input is low, word 1 (A1, B1, C1, D1) is applies to
the flip-flops. A high input to word select will cause the selection of word
2 (A2, B2, C2, D2). The selected word is clocked to the output terminals on
the negative-going edge of the clock pulse.
Typical power dissipation is 195 milliwatts for the '298 and 65 milliwatts
for the 'LS298. SN54298 and SN54LS298 are characterized for operation over
the full military temperature range of -55°C to 125°C; SN74298 and
SN74LS298 are characterized for operation from 0°C to 70°C.
