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M74HC123TTR Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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M74HC123TTR Scheda tecnica(HTML) 1 Page - STMicroelectronics |
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1 / 12 page  1/12 July 2001 s HIGH SPEED : tPD = 23 ns (TYP.) at VCC = 6V s LOW POWER DISSIPATION: STAND BY STATE : ICC=4µA (MAX.) at TA=25°C ACTIVE STATE : ICC=200µA (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 = 120 ns ~ 60 s OVER AT VCC = 4.5 V s PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 123 DESCRIPTION The M74HC123 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 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 Ω, the output pulse width value is approsimatively 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 5KΩ to 1MΩ Vcc > 3.0V 1KΩ to 1MΩ All inputs are equipped with protection circuits against static discharge and transient excess voltage. M74HC123 DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR PIN CONNECTION AND IEC LOGIC SYMBOLS ORDER CODES PACKAGE TUBE T & R DIP M74HC123B1R SOP M74HC123M1R M74HC123RM13TR TSSOP M74HC123TTR TSSOP DIP SOP |
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