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TI产品 - SN74LVTH32373-EP介绍
SN74LVTH32373-EP - 具有三态输出的增强型产品 3.3V Abt 32 位透明 D 类锁存器

SN74LVTH32373-EP是TI公司的一款D类锁存器产品,SN74LVTH32373-EP是具有三态输出的增强型产品 3.3V Abt 32 位透明 D 类锁存器,本页介绍了SN74LVTH32373-EP的产品说明、应用、特性等,并给出了与SN74LVTH32373-EP相关的TI元器件型号供参考。

SN74LVTH32373-EP - 具有三态输出的增强型产品 3.3V Abt 32 位透明 D 类锁存器 - D类锁存器 - 触发器/锁存器/寄存器 - TI公司(Texas Instruments,德州仪器)

产品描述

The SN74LVTH32373 is a 32-bit transparent D-type latch designed for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. This device is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.

This device can be used as four 8-bit latches, two 16-bit latches, or one 32-bit latch. When the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the levels set up at the D inputs.

A buffered output-enable (OE)\ input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without interface or pullup components.

OE\ does not affect internal operations of the latch. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.

When VCC is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, OE\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

This device is fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

产品特性

  • Controlled Baseline
    • One Assembly/Test Site, One Fabrication Site
  • Enhanced Diminishing Manufacturing Sources (DMS) Support
  • Enhanced Product-Change Notification
  • Qualification Pedigree
  • Member of the Texas Instruments Widebus+™ Family
  • State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low Static-Power Dissipation
  • Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C
  • Ioff and Power-Up 3-State Support Hot Insertion
  • Supports Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)
  • Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
  • Supports Unregulated Battery Operation Down To 2.7 V
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits. Widebus+ is a trademark of Texas Instruments.

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