M54HC123| Datasheet

M54HC123, M54HC123D, M54HC123D1, M54HC123K, M54HC123K1

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M54HC123
RAD-HARD DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
s s

s s

HIGH SPEED: tPD = 23 ns (TYP.) at VCC = 6V LOW POWER DISSIPATION: STAND BY STATE: ICC=4uA (MAX.) at TA=25 C ACTIVE STATE: ICC=200uA (MAX.) at VCC = 5V 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 WIDE OUTPUT PULSE WIDTH RANGE: tWOUT = 120 ns ~ 60 s OVER AT VCC = 4.5 V PIN AND FUNCTION COMPATIBLE WITH 54 SERIES 123 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-9207-006

DILC-16

FPC-16

ORDER CODES
PACKAGE DILC FPC FM M54HC123D M54HC123K EM M54HC123D1 M54HC123K1

DESCRIPTION The M54HC123 is an high speed CMOS MONOSTABLE MULTIVIBRATOR fabricated with silicon gate C2MOS technology. There are two trigger inputs, A INPUT (negative edge) and B INPUT (positive edge). These inputs PIN CONNECTION

are valid for slow rising/falling signals, (tr=tf=l sec). The device may also be triggered by using the CLR input (positive-edge) because of the Schmitt-trigger input; after triggering the output maintains the MONOSTABLE state for the time period determined by the external resistor RX and capacitor CX. When CX > 10nF and RX > 10K, the output pulse width value is approximately given by the formula: tW(OUT) = K Cx Rx. (K 0.45). Taking CLR low breaks this MONOSTABLE STATE. If the next trigger pulse occurs during the MONOSTABLE period it makes the MONOSTABLE period longer. Limit for values of Cx and Rx : Cx : NO LIMIT Rx : VCC < 3.0V 5K to 1M VCC > 3.0V 1K to 1M All inputs are equipped with protection circuits against static discharge and transient excess voltage.

March 2004

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