TC74VCXHR162543FT

2007-10-19

1

TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic

TC74VCXHR162543FT

Low-Voltage 16-Bit Registered Transceiver with Bushold

The TC74VCXHR162543FT is a high-performance CMOS

16-bit registered transceiver. Designed for use in 1.8-V, 2.5-V or

3.3-V systems, it achieves high-speed operation while

maintaining the CMOS low power dissipation.

The TC74VCXHR162543FT 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.

The A, B data inputs include active bushold circuitry, eliminating the need for external pull-up resistors to hold

unused or floating data inputs at a valid logic level.

All inputs are equipped with protection circuits against static discharge.

Features (Note)

• 26-Ω series resistors on outputs

• Bushold on data inputs eliminating the need for external pull-up/pull-down resistors

• 3.6-V tolerant control inputs

• Latch-up performance: −300 mA

• ESD performance: Machine model ≥ ±200 V

Human body model

≥ ±2000 V

• Package: TSSOP

Note:

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

Weight: 0.25 g (typ.)