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HCF4538 Datasheet(PDF) 1 Page - STMicroelectronics |
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HCF4538 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 14 page  HCC4538B HCF4538B September 1988 DUAL MONOSTABLE MULTIVIBRATOR EY (Plastic Package) DESCRIPTION ORDER CODES : HCC4538BF HCF4538BM1 HCF4538BEY HCF4538BC1 F (Ceramic Package) M1 (Micro Package) C1 (Chip Carrier) PIN CONNECTIONS The HCC4538B (extended temperature range) and HCF4538B (intermediate temperature range) are monolithic integrated circuit, available in 16-lead dual in-line plastic or-ceramic package and plastic micro package. The HCC/HCF4538B dual precision monostable multivibrator provides stable retrigger- able/resettable one-shot operation for any fixed- voltage timing application. An external resistor (RX) and an external capacitor (CX) control the timing and accuracy for the circuit. Adjustment of RX and CX provides a wide range of output pulse widths from the Q and Q terminals. The time delay from trigger input to output transition (trigger propagation delay) and the time delay from reset input to output transi- tion (reset propagation delay) are independent of RX and CX. Precision control of output pulse widths is achieved through linear CMOS techniques. Lead- ing-edge-triggering (+ TR) and trailing-edge-trigger- ing (– TR) inputs are provided for triggering from either edge of an input pulse. An unused + TR input should be tied to VSS. An unused – TR input should be tied to VDD. A RESET (on low level) is provided for immediate termination of the output pulse or to . RETRIGGERABLE/RESETTABLE CAPABILITY . TRIGGER AND RESET PROPAGATION DE- LAYS INDEPENDENT OF RX,CX . TRIGGERING FROM LEADING OR TRAILING EDGE . Q AND Q BUFFERED OUTPUTS AVAILABLE . SEPARATE RESETS . WIDE RANGE OF OUTPUT-PULSE WIDTHS . QUIESCENT CURRENT SPECIFIED TO 20V FOR HCC DEVICE . 5V, 10V, AND 15V PARAMETRIC RATINGS . SCHMITT TRIGGER INPUT ALLOWS UN- LIMITER RISE AND FALL TIMES ON + TR AND – TR INPUTS . INPUT CURRENT OF 100nA AT 18V AND 25 °C FOR HCC DEVICE . 100% TESTED FOR QUIESCENT CURRENT . MEETS ALL REQUIREMENTS OF JEDEC TEN- TATIVE STANDARD N °13A, ”STANDARD SPE- CIFICATIONS FOR DESCRIPTION OF ”B” SERIES CMOS DEVICES” 1/14 |
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