74HC699 Datasheet (STMicroelectronics) - 4 BIT BINARY COUNTER/REGISTER

74HC699, 4 BIT BINARY COUNTER/REGISTER

The HC696/697 are high speed CMOS up/down counters fabricated with silicon gate C2MOS technology.

They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation.

The HC696/698 are BCD DECADE COUNTER, and the HC697/699 are 4-BIT BINARY COUNTER.

Both

M54/74HC696/697 M54/74HC698/699 HC696/698 U/D DECADE COUNTER/REGISTER (3-STATE) HC697/699 U/D 4 BIT BINARY COUNTER/REGISTER (3-STATE) .

HIGH SPEED fMAX = 50 MHz (TYP.) AT VCC = 5 V LOW POWER DISSIPATION ICC = 4 µA (MAX.) AT TA = 25 °C HIGH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) OUTPUT DRIVE CAPABILITY 15 LSTTL LOADS (for QA to QD) 10 LSTTL LOADS (for RCO) SYMMETRICAL OUTPUT IMPEDANCE |IOH| = IOL = 6 mA (MIN.) FOR QA TO QD |IOH| = IOL = 4 mA (MIN.) FOR RCO OUTPUT BALANCED PR

74HC699 Features

* enable P and enable T and a ripple-carry output for easy expansion. the register/counter select input, R/C, selects the counter when low or the register when high for the three state outputs, QA, QB, Qc and QD. Both the counter clock CCK and register clock RCK are positive-edge triggered. The counte