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M54HC193 Datasheet(PDF) 1 Page - STMicroelectronics |
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M54HC193 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 13 page  1/13 April 2004 s HIGH SPEED: fMAX=55MHz (TYP.) at VCC=6V s LOW POWER DISSIPATION: ICC =4µA(MAX.) at TA=25°C s HIGH NOISE IMMUNITY: VNIH =VNIL = 28% VCC (MIN.) s SYMMETRICAL OUTPUT IMPEDANCE: |IOH|= IOL =4mA (MIN) s BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL s WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V s PIN AND FUNCTION COMPATIBLE WITH 54 SERIES 193 s SPACE GRADE-1: ESA SCC QUALIFIED s 50 krad QUALIFIED, 100 krad AVAILABLE ON REQUEST s NO SEL UNDER HIGH LET HEAVY IONS IRRADIATION s DEVICE FULLY COMPLIANT WITH SCC-9204-065 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. This counter may be preset by entering the desired data on the DATA A, DATA B, DATA C, and DATA D input. When the LOAD input is taken low the data is loaded independently of either clock input. This feature allows the counters to be used as divide-by-n counters by modifying the count length with the preset inputs. In addition the counter can also be cleared. This is accomplished by inputting a high on the clear input. All 4 internal stages are set to low independently of either COUNT input. Both a BORROW and CARRY output are provided to enable cascading of both up and down counting functions. The BORROW output produces a negative going pulse when the counter underflows and the CARRY outputs a pulse when the counters overflows. The counter can be cascaded by connection the CARRY and BORROW outputs of one device to the COUNT UP and COUNT DOWN inputs, respectively, of the next device. All inputs are equipped with protection circuits against static discharge and transient excess voltage. M54HC193 RAD-HARD SYNCHRONOUS UP/DOWN BINARY COUNTER PIN CONNECTION ORDER CODES PACKAGE FM EM DILC M54HC193D M54HC193D1 FPC M54HC193K M54HC193K1 DILC-16 FPC-16 |
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