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State-of-the-Art EPIC-IIBE BiCMOS Design

Significantly Reduces Power Dissipation

ESD Protection Exceeds 2000 V Per

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

Typical VOLP (Output Ground Bounce) < 1 V

at VCC = 5 V, TA = 25°C

High-Drive Outputs (–32-mA IOH, 64-mA IOL)

Package Options Include Plastic

Small-Outline (DW), Shrink Small-Outline

(DB), and Thin Shrink Small-Outline (PW)

Packages, Ceramic Chip Carriers (FK),

Ceramic Flat (W) Package, and Plastic (NT)

and Ceramic (JT) DIPs

description

The ’ABT543A octal transceivers contain two sets

of D-type latches for temporary storage of data

flowing in either direction. 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 the CEBA, LEBA,

and OEBA inputs.

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.

The SN54ABT543A is characterized for operation over the full military temperature range of –55°C to 125°C.

The SN74ABT543A is characterized for operation from –40°C to 85°C.