74HC163 Datasheet PDF - Philips

GENERAL DESCRIPTION

●The 74HC/HCT163 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT163 are synchronous presettable binary counters which feature an internal look-ahead carry and can be used for high-speed counting. Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock (CP). The outputs (Q0 to Q3) of the counters may be preset to a HIGH or LOW level. A LOW level at the parallel enable

●input (PE) disables the counting action and causes the data at the data inputs (D0to D3) to be loaded into the counter on the positive-going edge of the clock (providing that the set-up and hold time requirements for PE are met).

●FEATURES

●• Synchronous counting and loading

●• Two count enable inputs for n-bit cascading

●• Positive-edge triggered clock

●• Synchronous reset

●• Output capability: standard

●• ICCcategory: MSI