描述 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.

特性 Features

? State-of-the-ArtEPIC-II BTM 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) CC = 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 EPIC-IIB is a trademark of Texas Instruments Incorporated.