Philips 74HCT173
The 74HC/HCT173 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. The 74HC/HCT173 are 4-bit parallel load registers with clock enable control, 3-state buffered outputs (Q0 to Q3) and master reset (MR).FEATURES
● Gated input enable for hold (do nothing) mode● Gated output enable control
● Edge-triggered D-type register
● Asynchronous master reset
● Output capability: bus driver
● ICC category: MSI
GENERAL DESCRIPTION
7A. When the two data enable inputs (E1 and E2) are LOW, the data on the Dn inputs is loaded into the register QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns 74HC/HCT173 synchronously with the LOW-to-HIGH clock (CP) transition. When one or both En inputs are HIGH one set-up time prior to the LOW-to-HIGH clock transition, the register will retain the previous data. Data inputs and clock enable inputs are fully edge-triggered and must be stable only one set-up time prior to the LOW-to-HIGH clock transition. The master reset input (MR) is an active HIGH asynchronous input. When MR is HIGH, all four flip-flops are reset (cleared) independently of any other input condition. The 3-state output buffers are controlled by a 2-input NOR gate. When both output enable inputs (OE1 and OE2) are LOW, the data in the register is presented to the Qn outputs.