SN74ALVCH16543 16-BIT REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS

SCES025C - JULY 1995 - REVISED OCTOBER 1997

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features

Member of the Texas Instruments Widebus^TM Family
EPIC^TM (Enhanced-Performance Implanted CMOS) Submicron Process
Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
Latch-Up Performance Exceeds 250 mA Per JESD 17
Package Options Include Plastic 300-mil Shrink Small-Outline (DL) and Thin Shrink Small-Outline (DGG) Packages
EPIC and Widebus are trademarks of Texas Instruments Incorporated.

description

This 16-bit registered transceiver is designed for 2.3-V to 3.6-V V_CC operation.

The SN74ALVCH16543 can be used as two 8-bit transceivers or one 16-bit transceiver. Separate latch-enable (LEAB\ or LEBA\) and output-enable (OEAB\ or OEBA\) inputs are provided for each register to permit independent control in either direction of data flow.

The A-to-B enable (CEAB\) input must be low to enter data from A or to output data from B. If CEAB\ is low and LEAB\ is low, the A-to-B latches are transparent; a subsequent low-to-high transition of LEAB\ puts the A latches in the storage mode. With CEAB\ and OEAB\ both low, the 3-state B outputs are active and reflect the data present at the output of the A latches. Data flow from B to A is similar, but requires using CEBA\, LEBA\, and OEBA\.

To ensure the high-impedance state during power up or power down, OE\ should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

The SN74ALVCH16543 is characterized for operation from -40°C to 85°C.

Title: 16-BIT REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS
Product Family: REGISTERED TRANSCEIVERS
Device Functionality: 16-BIT REGISTERED BUS TRANSCEIVERS
Orderable Devices: SN74ALVCH16543DGGR, SN74ALVCH16543DL, SN74ALVCH16543DLR

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