SN54ABT16373, SN74ABT16373 16-BIT TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS

features

• Members of the Texas Instruments Widebus^TM Family
• State-of-the-Art EPIC-IIB^TM BiCMOS Design Significantly Reduces Power Dissipation
• ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
• Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17
• Typical V_OLP (Output Ground Bounce) < 0.8 V at V_CC = 5 V, T_A = 25°C
• Distributed V_CC and GND Pin Configuration Minimizes High-Speed Switching Noise
• Flow-Through Architecture Optimizes PCB Layout
• High-Drive Outputs (-32-mA I_OH, 64-mA I_OL)
• Packaged in Plastic 300-mil Shrink Small-Outline Packages and 380-mil Fine-Pitch Ceramic Flat Packages Using 25-mil Center-to-Center Spacings

  Widebus and EPIC-IIB are trademarks of Texas Instruments Incorporated.

description

The 4ABT16373 is a 16-bit transparent D-type latch with 3-stateoutputs designed specifically for driving highly capacitive orrelatively low-impedance loads. It is particularly suitable forimplementing buffer registers, I/O ports, bidirectional bus drivers,and working registers.

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

A buffered output-enable () input can be used to place the eight outputs in eithera normal logic state (high or low logic levels) or a high-impedancestate. In the high-impedance state, the outputs neither load nordrive the bus lines significantly. The high-impedance state and theincreased drive provide the capability to drive bus lines withoutneed for interface or pullup components

The output enable ()does not affect internal operations of the latch. Old data can beretained or new data can be entered while the outputs are in thehigh-impedance state.

To ensure the high-impedance state during power up or power down, should be tiedto V_CC through a pullup resistor; the minimum value of theresistor is determined by the current-sinking capability of thedriver.

The SN74ABT16373 is available in TI's shrink small-outline package(DL), which provides twice the I/O pin count and functionality ofstandard small-outline packages in the same printed-circuit-boardarea.

The SN54ABT16373 is characterized for operation over the fullmilitary temperature range of -55°C to 125°C. TheSN74ABT16373 is characterized for operation from -40°C to85°C.

View more information about generic part numbers:SN74ABT16373

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.

(c) Copyright 1998 Texas Instruments Incorporated. All rights reserved.
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