74AVCH1T45DW-7

Overview

The 74AVCH1T45DW-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 SOT-363-6 package and supports bidirectional data transmission controlled by a DIR pin referenced to VCCA.

Feature Summary

• Bus hold feature maintains valid logic levels on unused or disconnected inputs
• IOFF capability isolates signals when either power domain is turned off
• Inputs accept up to 4.6V while operating at lower supply voltages

Applications

• Voltage level translation between logic types operating at different voltages
• Power down signal isolation preventing loading on signal lines
• Portable electronics such as cell phones, tablets, and e-readers
• Computing devices including PCs, notebooks, and netbooks
• Networking equipment like routers and gateways

Procurement Notes

Verify the specific ordering suffix matches the required packaging configuration. Confirm that the component meets RoHS compliance standards for halogen and antimony-free requirements. Ensure the selected package variant aligns with the intended PCB layout constraints and thermal management needs for the application environment.

Selection Notes

Select this component when interfacing two distinct voltage domains requiring a single bit of bidirectional translation. The inclusion of bus hold simplifies design by eliminating pull-up or pull-down resistors for floating inputs. Verify that the maximum operating temperature range of -40°C to +85°C suits the environmental conditions of the target system.

Part Context

This part belongs to the 74AVCH series of low-voltage translators from Diodes Incorporated. It serves as a specialized variant of the standard 74AVC1T45 by integrating bus hold circuitry directly into the silicon die. The DW suffix specifically denotes the SOT-363 surface-mount package format used in compact electronic assemblies.

Replacement Considerations

The 74AVC1T45 is the base family member but lacks the integrated bus hold feature found in this variant.