DESCRIPTION

The M74HC298 is an high speed CMOS QUAD 2 CHANNEL MULTIPLEXER/REGISTER fabricated with silicon gate C2MOS technology.

These circuits are controlled by the signals WORD SELECT and CLOCK. When the WORD SELECT input is taken low Word 1 (A1, B1, C1 and D1) is presented to the input of the flip-flops, and when WORD SELECT is high Word 2 (A2, B2, C2 and D2) is presented to the inputs of the flip-flops. The select word is clocked to the output terminals on the negative edge of the clock pulse.

All inputs are equipped with protection circuits against static discharge and transient excess voltage.

■ HIGH SPEED: fMAX = 79 MHz (TYP.) at VCC = 6V

■ LOW POWER DISSIPATION: ICC = 4μA(MAX.) at TA=25°C

■ HIGH NOISE IMMUNITY: VNIH = VNIL = 28 VCC (MIN.)

■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN)

■ BALANCED PROPAGATION DELAYS: tPLH ? tPHL

■ WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V

■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 298