74LVC245APW,112

Overview

The Nexperia 74LVC245APW,112 is an octal bus transceiver with 3-state outputs housed in a TSSOP20 package. It operates on a supply voltage range of 1.2 V to 3.6 V and supports overvoltage tolerant inputs up to 5.5 V. The device features Schmitt-trigger action for slow input transitions and IOFF circuitry for partial power-down applications. Propagation delay ranges from 1.5 ns to 8.7 ns depending on voltage, with output drive capabilities of ±24 mA.

Feature Summary

• Provides bi-directional data transmission between two 8-bit buses using OE and DIR control signals.
• Features IOFF circuitry to prevent damaging backflow currents during partial power-down states.
• Includes Schmitt-trigger inputs to ensure tolerance against slow rise and fall times.
• Supports mixed 3.3 V and 5 V environments through overvoltage tolerant inputs.

Applications

• Mixed 3.3 V and 5 V system interfacing
• Partial power-down mode operation
• Bi-directional bus communication

Procurement Notes

Verify the specific suffix '112' corresponds to the TSSOP20 (SOT360-1) package variant as defined in the ordering information table. Confirm that the required temperature range covers -40 °C to +125 °C. Ensure design compatibility with the 1.2 V to 3.6 V supply voltage limits and check for any specific JEDEC compliance requirements relevant to the target application environment.

Selection Notes

Select this component when an 8-bit bi-directional interface is required with low power consumption and high noise immunity. The TSSOP20 package is suitable for space-constrained surface-mount designs. Consider the 74LVCH245A variant if bus-hold functionality on all data inputs is necessary, as the standard LVC version lacks this feature.

Part Context

This part belongs to the 74LVC245A family of octal bus transceivers manufactured by Nexperia. It is designed for CMOS low-power applications and complies with various JEDEC standards for different voltage ranges. The device is specified for industrial temperature ranges and includes robust ESD protection mechanisms.

Replacement Considerations

The 74LVCH245APW,112 serves as a direct replacement if bus-hold functionality is required. Other pin-compatible variants include the SO20 package version (74LVC245AD,118) and leadless packages such as DHVQFN20 (74LVC245ABQ,118). Verify package dimensions and thermal characteristics when substituting.

FAQ

How does the IOFF circuitry function?

The IOFF circuitry disables the outputs when the device is powered down, preventing potentially damaging backflow current through the device.

What is the purpose of the Schmitt-trigger action?

Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall times, ensuring clean switching even with degraded signal edges.