1. General description

The 74LVC573A is an 8-bit D-type transparent latch with 3-state outputs. The device features latch

enable (LE) and output enable (OE) inputs. When LE is HIGH, data at the inputs enter the latches.

In this condition the latches are transparent, a latch output will change each time its corresponding

D-input changes. When LE is LOW the latches store the information that was present at the inputs

a set-up time preceding the HIGH-to-LOW transition of LE. A HIGH on OE causes the outputs to

assume a high-impedance OFF-state. Operation of the OE input does not affect the state of the

latches. Inputs can be driven from either 3.3 V or 5 V devices. This feature allows the use of these

devices as translators in mixed 3.3 V and 5 V environments.

Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall times.

This device is fully specified for partial power down applications using IOFF. The IOFF circuitry

disables the output, preventing the potentially damaging backflow current through the device when

it is powered down.

2. Features and benefits

• Wide supply voltage range from 1.2 to 3.6 V

• Overvoltage tolerant inputs to 5.5 V

• CMOS low power consumption

• Direct interface with TTL levels

• IOFF circuitry provides partial Power-down mode operation

• High-impedance when VCC = 0 V

• Flow-through pinout architecture

• Complies with JEDEC standard:

• JESD8-7A (1.65 V to 1.95 V)

• JESD8-5A (2.3 V to 2.7 V)

• JESD8-C/JESD36 (2.7 V to 3.6 V)

• ESD protection:

• HBM JESD22-A114F exceeds 2000 V

• MM JESD22-A115-B exceeds 200 V

• CDM JESD22-C101E exceeds 1000 V

• Specified from -40 °C to +85 °C and -40 °C to +125 °C

74LVC573A属于集成电路（IC） > 锁存器。安世半导体(中国)有限公司制造生产的74LVC573A锁存器锁存器是类似于触发器的基本数字存储设备，但是不同之处在于，在锁存使能（或类似命名）信号处于有效逻辑状态的任何时间，保持的逻辑状态都可以改变。“透明”锁存器还允许设备输出在锁存使能信号有效时反映输入的当前状态，而相反的是，状态仅在保持状态已固定时改变。