74AVCH1T45FZ4-7

Overview

The 74AVCH1T45FZ4-7 is a single-bit dual power supply translating transceiver with 3-state outputs manufactured by Diodes Incorporated. It operates within a voltage range of 1.2V to 3.6V on both VCCA and VCCB domains. The device features bus hold functionality at each input, maintaining previous logic levels without external resistors. It utilizes an X2-DFN1410-6 package and supports partial-power-down mode via IOFF control when either supply voltage reaches zero.

Feature Summary

• Dual-supply architecture enabling universal low-voltage translation between any voltages from 1.2V to 3.6V
• Integrated bus hold feature maintains valid logic levels on unused or disconnected inputs
• IOFF capability ensures high-impedance state during partial-power-down to prevent backflow currents
• Direction pin controls signal flow direction relative to the VCCA reference level

Applications

• Voltage level translation between logic types operating at different voltages
• Power down signal isolation to prevent loading on signal lines when a domain is off
• Portable electronics such as cell phones, tablets, and e-readers
• Computer peripherals including hard drives and CD/DVD ROMs
• Networking equipment such as routers and gateways

Procurement Notes

Verify the specific ordering suffix FZ4 corresponds to the X2-DFN1410-6 package configuration before procurement. Confirm that the -7 suffix indicates tape and reel packaging quantities. Ensure compatibility with RoHS and halogen-free requirements if applicable to your manufacturing standards. Cross-reference the datasheet revision DS40288 Rev. 1-2 for accurate electrical characteristics.

Selection Notes

Select this component when interfacing single-bit signals between disparate voltage domains within the 1.2V to 3.6V range. The integrated bus hold eliminates the need for external pull-up or pull-down resistors on floating inputs. Consider the X2-DFN1410-6 package dimensions for PCB layout constraints. Verify that the required propagation delay and output drive current meet the system specifications under the target operating temperatures.

Part Context

This part belongs to the 74AVCH1T45 family of single-bit dual power supply translating transceivers. It is a variant of the standard 74AVC1T45, distinguished by the inclusion of bus hold circuitry at the inputs. The FZ4 suffix specifically designates the X2-DFN1410-6 chip-scale package, providing a compact footprint suitable for space-constrained portable electronic designs.

Replacement Considerations

The 74AVC1T45 serves as a functional substitute but lacks the integrated bus hold feature found in the AVCH variant. Other packages within the same logical family, such as SOT363 (DW) or SOT26 (W6), offer identical electrical performance with different physical footprints.