TC74VCXR162543FT

2007-10-19

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74VCXR162543FT

Low-Voltage 16-Bit Registered Transceiver with 3.6-V Tolerant Inputs and Outputs

The TC74VCXR162543FT is a high-performance CMOS 16-bit

registered transceiver. Designed for use in 1.8-V, 2.5-Vor 3.3-V

systems, it achieves high-speed operation while maintaining the

CMOS low power dissipation.

It is also designed with overvoltage tolerant inputs and outputs

up to 3.6 V.

The TC74VCXR162543FT 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 in order 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 Alatches 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.

When the OE input is high, the outputs are in a high-impedance state. This device is designed to be used with

3-state memory address drivers, etc.

The 26-Ω series resistor helps reducing output overshoot and undershoot without external resistor.

All inputs are equipped with protection circuits against static discharge.

Features (Note)

• 26-Ω series resistors on outputs

• Latch-up performance: −300 mA

• ESD performance: Machine model ≥ ±200 V

Human body model

≥ ±2000 V

• Package: TSSOP

• Bidirectional interface between 2.5 V and 3.3 V signals.

• 3.6-V tolerant function and power-down protection provided on all inputs and outputs

Note:

Do not apply a signal to any bus pins when it is in the output mode. Damage may result.

All floating (high impedance) bus pins must have their input level fixed by means of pull-up or pull-down

resistors.

Weight: 0.25 g (typ.)