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DESCRIPTION

The 74LVX3245 is a dual supply low voltage CMOS OCTAL BUS TRANSCEIVER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. Designed for use as an interface between a 5V bus and a 3.3V bus in a mixed 5V/3.3V supply systems, it achieves high speed operation while maintaining the CMOS low power dissipation.

This IC is intended for two-way asynchronous communication between data buses and the direction of data transmission is determined by DIR input. The enable input G can be used to disable the device so that the buses are effectively isolated.

The A-port interfaces with the 3V bus, the B-port with the 5V bus.

All inputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.

■ HIGH SPEED:

tPD = 8ns (MAX.) at TA=25°C

VCCA = 3.3V, VCCB = 5.0V

■ LOW POWER DISSIPATION:

ICCA = ICCB = 5μA(MAX.) at TA=25°C

■ LOW NOISE: VOLP =0.3V (TYP.) at VCC =3.3V

■ SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 24mA (MIN)

■ BALANCED PROPAGATION DELAYS: tPLH ? tPHL

■ OPERATING VOLTAGE RANGE:

VCCA(OPR) = 2.7V to 3.6V (1.2V Data Retention)

VCCB(OPR) = 4.5V to 5.5V (1.2V Data Retention)

PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 3245

■ IMPROVED LATCH-UP IMMUNITY