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.