FEATURES

· Member of the Texas Instruments Widebus™

Family

· EPIC™ (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

DESCRIPTION

This 16-bit registered transceiver is designed for

1.65-V to 3.6-V VCC 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 VCC 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.