Members of the Texas Instruments

WidebusE Family

Inputs Are TTL-Voltage Compatible

3-State True Outputs

Flow-Through Architecture Optimizes

PCB Layout

Distributed VCC and GND Pin

Configurations Minimize High-Speed

Switching Noise

EPIC (Enhanced-Performance Implanted

CMOS) 1-
m Process

500-mA Typical Latch-Up Immunity at

125°C

Package Options Include Plastic Thin

Shrink Small-Outline (DGG) and 300-mil

Shrink Small-Outline (DL) Packages Using

25-mil Center-to-Center Pin Spacings, and

380-mil Fine-Pitch Ceramic Flat (WD)

Packages Using 25-mil Center-to-Center

Pin Spacings

description

The ’ACT16543 are 16-bit registered transceivers

that contain two sets of D-type latches for

temporary storage of data flowing in either

direction. The ’ACT16543 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) and OEAB inputs must

be low to enter data from A or to output data to B.

Having CEAB low and LEAB low makes the

A-to-B latches transparent; a subsequent low-tohigh

transition at LEAB puts the A latches in the

storage mode. Data flow from B to A is similar, but

requires using the CEBA, LEBA, and OEBA

inputs.

The 74ACT16543 is packaged in TI’s shrink small-outline package, which provides twice the functionality of

standard small-outline packages in the same printed-circuit-board area.

The 54ACT16543 is characterized for operation over the full military temperature range of –55°C to 125°C. The

74ACT16543 is characterized for operation from –40°C to 85°C.