器件名称:
M74HC123B1R
功能描述:
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR
文件大小:
503.91KB 共12页
简 介:
M74HC123 DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR s s s s s s s s HIGH SPEED : tPD = 23 ns (TYP.) at VCC = 6V LOW POWER DISSIPATION: STAND BY STATE : ICC=4A (MAX.) at TA=25°C ACTIVE STATE : ICC=200A (MAX.) at VCC = 5V HIGH NOISE IMMUNITY: VNIH = V NIL = 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 V CC = 4.5 V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 123 DIP SOP TSSOP ORDER CODES PACKAGE DIP SOP TSSOP TUBE M74HC123B1R M74HC123M1R T&R M74HC123RM13TR M74HC123TTR 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 PIN CONNECTION AND IEC LOGIC SYMBOLS period determined by the external resistor Rx and capacitor Cx. When Cx > 10nF and Rx > 10K, 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. Limi……
