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M74HC221 Datasheet(PDF) 1 Page - STMicroelectronics |
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M74HC221 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 14 page  1/14 July 2001 s HIGH SPEED : tPD = 24 ns (TYP.) at VCC = 6V s LOW POWER DISSIPATION: STAND BY STATE : ICC=4µA (MAX.) at TA=25°C ACTIVE STATE : ICC=700µA (MAX.) at VCC = 5V 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 WIDE OUTPUT PULSE WIDTH RANGE : tWOUT = 150 ns ~ 60 s OVER AT VCC = 4.5 V s PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 221 DESCRIPTION The M74HC221 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). Triggering on the B input occurs at a particular voltage threshold and is not related to rise and fall time of the applied pulse. The device may also be trigger by using the CLR input (positive edge) because of the Schimtt-trigger input; after triggering the output maintains the MONOSTABLE STATE for the time period determined by the external resistor Rx and capacitor Cx. 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 5KΩ to 1MΩ Vcc > 3.0V 1KΩ to 1MΩ K ≅ 0.7 All inputs are equipped with protection circuits against static discharge and transient excess voltage. M74HC221 DUAL MONOSTABLE MULTIVIBRATOR PIN CONNECTION AND IEC LOGIC SYMBOLS ORDER CODES PACKAGE TUBE T & R DIP M74HC221B1R SOP M74HC221M1R M74HC221RM13TR TSSOP M74HC221TTR TSSOP DIP SOP |
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Similar Description - M74HC221 |
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