74HC93
Overview
- Various counting modes
- Asynchronous master reset
- Output capability: standard
- ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT93 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/HCT93 are 4-bit binary ripple counters. The devices consist of four master-slave flip-flops internally connected to provide a QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns divide-by-two section and a divide-by-eight section. Each section has a separate clock input (CP0 and CP1) to initiate state changes of the counter on the HIGH-to-LOW clock transition. State changes of the Qn outputs do not occur simultaneously because of internal ripple delays. Therefore, decoded output signals are subject to decoding spikes and should not be used for clocks or strobes. A gated AND asynchronous master reset (MR1 and MR2) is provided which overrides both clocks and resets (clears) all flip-flops. Since the output from the divide-by-two section is not internally connected to the succeeding stages,
