DESCRIPTION
The M54HC193 is an high speed CMOS SYNCRONOUS UP/DOWN BINARY COUNTERS fabricated with silicon gate C2MOS technology.
The counter has two separate clock inputs, an UP COUNT input and a DOWN COUNT input. All
outputs of the flip-flop are simultaneously triggered on the low to high transition of either
clock while the other input is held high. The direction of counting is determined by which input
is clocked.

■ HIGH SPEED: fMAX=55MHz (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 54 SERIES 193
■ SPACE GRADE-1: ESA SCC QUALIFIED
■ 50 krad QUALIFIED, 100 krad AVAILABLE ON REQUEST
■ NO SEL UNDER HIGH LET HEAVY IONS IRRADIATION
■ DEVICE FULLY COMPLIANT WITH SCC-9204-065