74LVCH16245ADGG,11

Overview

The Nexperia 74LVCH16245ADGG,11 is a 16-bit bus transceiver with 3-state outputs housed in a 48-lead TSSOP package (SOT362-1). It operates on a supply voltage range of 1.2 V to 3.6 V and supports input voltages up to 5.5 V. The device features Schmitt-trigger inputs for noise immunity and includes IOFF circuitry for partial power-down protection. Data inputs possess active bus hold functionality. It functions as two independent 8-bit transceivers or one 16-bit unit, utilizing separate direction and output enable controls.

Feature Summary

• Active bus hold circuitry on all data inputs eliminates the need for external pull-up resistors.
• IOFF circuitry disables outputs during power-down to prevent damaging backflow current.
• Schmitt-trigger inputs provide tolerance for slower rise and fall times.
• Overvoltage tolerant inputs allow direct interfacing with 5 V devices.

Applications

• Mixed 3.3 V and 5 V environment translation
• Partial power-down applications
• Bus-oriented communications

Procurement Notes

Verify the specific ordering suffix

Selection Notes

Select this component when a 16-bit bidirectional interface is required within a single low-voltage logic family. The LVCH variant specifically provides internal bus holding, distinguishing it from the standard LVC version which lacks this feature. Ensure the application requires a single-supply architecture rather than dual-supply level shifting.

Part Context

This part belongs to the Nexperia 74LVC/LVCH 16245A family of 16-bit bus transceivers. While the base 74LVC16245A shares the same pinout and core functionality, the 74LVCH16245A variant uniquely integrates active bus hold circuits on its data inputs. Both variants utilize the MULTIBYTE flow-through architecture and are designed for high-density PCB layouts.

Replacement Considerations

The 74LVC16245ADGG is a functional substitute but lacks the integrated bus hold feature found in the LVCH variant. Designers must evaluate if external pull-up resistors are necessary if substituting the non-H version.

FAQ

Does the 74LVCH16245ADGG support partial power-down mode?

Yes, the device includes IOFF circuitry that automatically disables the outputs when the supply voltage drops, preventing potentially damaging backflow current through the device.

What is the function of the bus hold feature in this IC?

The active bus hold circuitry maintains unused or floating data inputs at a valid logic level, thereby eliminating the requirement for external pull-up resistors.