1. General description

The 74LVT16543A is a 16-bit registered transceiver with 3-state outputs. The device can be used

as two 8-bit transceivers or one 16-bit transceiver.

Data flow in each direction is controlled by intput enable (nEAB and nEBA), latch enable

(nLEAB and nLEBA), and output enable (nOEAB and nOEBA) inputs. For A to B data flow, the

device operates in the transparent mode when (nEAB) and (nLEAB) are LOW. A subsequent

LOW-to-HIGH transition of the nLEAB input latches the data and the outputs no longer change with

the inputs. A HIGH on either nEAB or nOEAB causes the outputs to assume a high-impedance

OFF-state.

Control of data flow from B to A is similar, but using the nEBA, nLEBA, and nOEBA inputs.

Bus hold data inputs eliminate the need for external pull-up resistors to define unused inputs

2. Features and benefits

? 16-bit universal bus interface

? 3-state buffers

? Wide supply voltage range from 2.7 to 3.6 V

? Input and output interface capability to systems at 5 V supply

? Overvoltage tolerant inputs to 5.5 V

? Direct interface with TTL levels

? BiCMOS high speed and output drive

? Output capability: +64 mA/-32 mA

? Bus-hold data inputs eliminate the need for external pull-up resistors to hold unused inputs

? Live insertion/extraction permitted

? Power-up 3-state

? Power-up reset

? No bus current loading when output is tied to 5 V bus

? IOFF circuitry provides partial Power-down mode operation

? Latch-up performance exceeds 500 mA per JESD 78 Class II Level B

? Complies with JEDEC standards

? JESD8C (2.7 V to 3.6 V)

? ESD protection:

? HBM: JESD22-A114F exceeds 2000 V

? MM: JESD22-A115-A exceeds 200 V