74ABT2245PW,112

Buffers, Drivers, Receivers, Transceivers Overview

The NXP USA Inc. 74ABT2245PW,112 is an octal bidirectional bus transceiver featuring non-inverting 3-State outputs and integrated 30 Ω series termination resistors. It operates within a supply voltage range of 4.5 V to 5.5 V and supports data rates up to 380 Mbit/s at 1.8 V to 3.3 V translation. The device utilizes BiCMOS technology for high speed and low power dissipation. Key electrical parameters include propagation delays of 1.0 ns to 5.4 ns depending on conditions, output drive capabilities of +12 mA and -32 mA, and quiescent supply currents ranging from 50 μA to 30 mA. It functions reliably across temperatures from -40 °C to +85 °C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrates 30 Ω series termination resistors in both HIGH and LOW states to reduce line noise without external components.
• Features dedicated Output Enable (OE) and Direction (DIR) inputs for simplified cascading and direction control.
• Includes I_OFF circuitry to prevent damaging backflow current during partial power-down mode.
• Provides active bus hold circuitry on data inputs to maintain valid logic levels for unused or floating pins.

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers
• Clock drivers
• Bus receivers and transmitters

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring octal data transfer with built-in impedance matching. The integrated 30 Ω resistors simplify PCB layout by eliminating external termination components. Ensure the design accommodates the specified 4.5 V to 5.5 V supply range and considers the thermal characteristics for the TSSOP-20 package if operating near maximum temperature limits.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the 74ABT logic family, characterized by BiCMOS technology that offers high-speed performance comparable to advanced TTL while maintaining CMOS low-power advantages. It serves as a functional equivalent to the 74ABT245-1, adhering to industry standards for octal bus transceivers. The part is manufactured by Philips Semiconductors, now NXP Semiconductors.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The datasheet explicitly states the device is the same as the 74ABT245-1. Verify pin compatibility and electrical specifications before substituting with other octal transceivers from different manufacturers.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle unused inputs?

The device features active bus hold circuitry on all data inputs. This eliminates the need for external pull-up resistors to define unused inputs, ensuring they remain at a valid logic level.

What protection is provided against live insertion?

The 74ABT2245 permits live insertion and extraction. Additionally, the I_OFF circuitry disables the outputs when the device is powered down, preventing potentially damaging backflow current through the device.