Series:	74AHC
Packaging:	Tube
Part Status:	Active
Logic Type:	D-Type Transparent Latch
Circuit:	8:8
Output Type:	Tri-State
Voltage - Supply:	2 V ~ 5.5 V
Independent Circuits:	1
Delay Time - Propagation:	1ns
Current - Output High, Low:	8mA, 8mA
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-TSSOP
Base Part Number:	74AHC573

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Logic - Latches

SN74AHC573PW is a dual 4-bit identity latch IC manufactured by Texas Instruments. It is packaged in an SOIC-20 surface mount package. It consists of four 4-bit individually addressable latches and is used in data transfers in a wide range of applications. The device has the capability of latching up to 8 bits of data in one clock cycle, making it one of the most popular latch devices on the market.

Features:

• High-Speed Clock to Output for Data Transfer
• Gates Fully Compatible With TTL and CMOS Logic
• Simplified Design for Level Translator and Protocol Buffers
• 20-Pin SOIC
• Low Power Consumption

Application fields

SN74AHC573PW is a useful device in a wide range of applications. It is ideal for use in data transfers, level translators, protocol buffers, and recorders. The device can also be used in high-speed data bus switching, as well as logic buffer operations in the presence of asynchronous signals. In addition, SN74AHC573PW is implemented in system management and serial communications applications.

Working principle

The principle of operation of SN74AHC573PW is based on the concept of latches. A latch is a digital device which holds a single bit of information. Latches are also known as memory elements because they are used to store a single logic state for an indefinite period of time. The primary purpose of a latch is to maintain a binary state until the latch is switched to an alternate state.The SN74AHC573PW consists of four 4-bit individually addressable latches. Each latch is double buffered to ensure the validity of the data stored. A clock signal is used to start the transfer of data from one latch to the other whenever a data transfer is initiated. The clock enables two buffers in each latch, a data output buffer and a data input buffer. The device also has two control signals, an active low Enable signal and an active high Write signal. The Enable signal is used to enable or disable the latch while the Write signal is used to initiate the data transfer.When the Enable signal is active and the Write signal is inactive, the latch is enabled and will accept the data from the input buffer.If the Write signal is active and the Enable signal is inactive, then the data from the data output buffer is transferred to the data input buffer on the opposite side of the latch and the data in the latch is stored. When both signals are inactive, the latch is disabled and the data is stored in the latch. The latches in the SN74AHC573PW are fully compatible with both TTL and CMOS logic, making them ideal for use in a wide range of applications. In addition, the device has a low power consumption which helps to reduce the overall power consumption of the system.In summary, SN74AHC573PW is a dual 4-bit identity latch IC manufactured by Texas Instruments. It is used in data transfers in a wide range of applications including high speed data bus switching and logic buffer operations. The device has two control signals, an active low Enable signal and an active high Write signal, and is fully compatible with both TTL and CMOS logic. The SN74AHC573PW provides an efficient way to transfer data between two latches and store it for an indefinite period of time.

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