General description

The 74LVCH322245A is a 32-bit transceiver featuring non-inverting 3-state bus compatible outputs in both send and receive directions. The device features four output enable (nOE) inputs for easy cascading and four send/receive (nDIR) inputs for direction control. Pin nOE controls the outputs so that the buses are effectively isolated. The device is designed with 30 Ω series termination resistors in both HIGH and LOW output stages to reduce line noise.

Inputs can be driven from either 3.3 V or 5 V devices. When disabled, up to 5.5 V can be applied to the outputs. These features allow the use of these devices in mixed 3.3 V and 5 V applications.

To ensure the high-impedance state during power-up or power-down, pin nOE should be tied to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Bus hold on data inputs eliminates the need for external pull-up resistors to hold unused inputs.

Features and benefits

■ 5 V tolerant inputs/outputs for interfacing with 5 V logic

■ Wide supply voltage range from 1.2 V to 3.6 V

■ CMOS low power consumption

■ MULTIBYTE flow-through standard pin-out architecture

■ Low inductance multiple power and ground pins for minimum noise and ground bounce

■ Direct interface with TTL levels

■ Integrated 30 ? termination resistors

■ All data inputs have bus hold

■ Complies with JEDEC standard:

◆ JESD8-7A (1.65 V to 1.95 V)

◆ JESD8-5A (2.3 V to 2.7 V)

◆ JESD8-C/JESD36 (2.7 V to 3.6 V)

■ ESD protection:

◆ HBM JESD22-A114F exceeds 2000 V

◆ MM JESD22-A115-B exceeds 200 V

◆ CDM JESD22-C101E exceeds 1000 V

■ Specified from -40 °C to +85 °C and -40 °C to +125 °C

■ Packaged in plastic fine-pitch ball grid array package