74LVCH16245ABQ,518

Overview

The 74LVCH16245ABQ,518 is a 16-bit bus transceiver featuring non-inverting 3-state outputs. It supports a supply voltage range of 1.2 V to 3.6 V and includes two output enable inputs for cascading and two direction control inputs. The device provides 5 V tolerant inputs/outputs, allowing direct interfacing with 5 V logic in mixed-voltage environments. All data inputs feature bus hold circuitry to maintain valid states without external pull-up resistors. It operates within an ambient temperature range of -40 °C to +125 °C.

Feature Summary

• Bus hold functionality on all data inputs eliminates the need for external pull-up resistors.
• High-impedance state when VCC = 0V prevents backflow current during partial power-down.
• Direct interface capability with TTL levels and 5 V tolerant I/Os.

Applications

• Mixed 3.3 V and 5 V system interconnects
• Partial power-down applications requiring IOFF protection
• Low noise ground bounce reduction in high-speed buses

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm package type and environmental compliance. Confirm that the HXQFN60U package variant matches the design footprint requirements. Ensure the component status is checked as production data sheets may be superseded by newer revisions or obsolescence notices.

Selection Notes

Select this component for designs requiring 16-bit bidirectional translation between 1.2 V and 3.6 V domains with 5 V tolerance. The integrated bus hold simplifies PCB layout by removing external pull-ups. Verify thermal dissipation limits for the HXQFN60U package if operating at maximum ambient temperatures.

Part Context

This part belongs to the 74LVC(H)16245A family of 16-bit bus transceivers. The 'H' designation indicates the inclusion of bus hold circuitry on data inputs, distinguishing it from the standard 74LVC16245A. The ABQ suffix identifies the specific HXQFN60U plastic thermal enhanced extremely thin quad flat package.

Replacement Considerations

74LVC16245ABQ,518 serves as the base functional equivalent without bus hold features. Other packages in the same family include 74LVCH16245ADL (SSOP48), 74LVCH16245ADGG (TSSOP48), and 74LVCH16245AEV (VFBGA56).

FAQ

What is the function of the bus hold circuit in the 74LVCH16245ABQ?

The bus hold circuit maintains a valid logic state at the data inputs even when they are floating, eliminating the need for external pull-up resistors.

How does the device handle partial power-down conditions?

The device features IOFF circuitry that disables the outputs when VCC is 0 V, preventing potentially damaging backflow current through the device.