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Home > Products > Integrated Circuits (ICs) > Logic > Translators, Level Shifters

Diodes Incorporated 74AVCH1T45FW3-7

Name: 74AVCH1T45FW3-7
Brand: Diodes Incorporated
SKU: 74AVCH1T45FW3-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AVCH1T45FW3-7

Manufacturer:: Diodes Incorporated

Category:: Translators, Level Shifters

Package:

Datasheet:: 74AVCH1T45FW3-7.pdf

Description:: IC TRNSLTR BIDIR X2DFN0910-6

Quantity:: RFQ Add To RFQ list

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Inventory:3,734

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Product details

Overview

74AVCH1T45FW3-7 from Diodes Incorporated is a single-bit, dual-supply translating transceiver with 3-state outputs and bus hold, designed for bidirectional voltage-level translation between 1.2V and 3.6V domains. It features independent VCCA and VCCB supplies, DIR-controlled directionality, I_OFF partial-power-down protection, and ±12mA drive at 3.3V. Used in mobile SoC interconnects where logic isolation across power domains is required.

For engineers reviewing the 74AVCH1T45FW3-7 datasheet, 74AVCH1T45FW3-7 pinout, 74AVCH1T45FW3-7 application, or 74AVCH1T45FW3-7 equivalent, this page delivers verified functional identity, validated X2-DFN0910-6 package mapping, confirmed 6-pin terminal roles, bus-hold-enabled input behavior, and real-world level-shifting use cases in portable electronics.

Technical Context

The device implements a dual-rail CMOS transceiver architecture with separate VCCA (A-side reference) and VCCB (B-side reference), enabling asymmetric voltage translation-e.g., 1.8V ↔ 3.3V or 1.2V ↔ 2.5V. DIR is referenced to VCCA and controls data flow direction without requiring external pull-ups.

Its I_OFF circuitry activates when either VCCA or VCCB = 0V, forcing all outputs into high-impedance while blocking backflow currents up to 3.6V on A/B pins. The integrated 10kΩ bus-hold circuit latches last valid input state, eliminating external termination resistors on unused inputs.

Key Specifications

Parameter	Value and Actual Design Meaning
Voltage Range	VCCA and VCCB independently support 1.2V to 3.6V-enables universal low-voltage translation across mixed-voltage SoC subsystems.
Output Drive	±12mA at 3.3V-sufficient to drive standard CMOS loads across PCB traces without signal degradation.
I_OFF Protection	Activates when either supply drops to 0V-prevents damaging back-currents and ensures electrical isolation during partial power-down.
Bus Hold	10kΩ internal resistor on each input-maintains last logic state, removing need for external pull-up/down resistors on floating inputs.
ESD Rating	HBM: 2000V, CDM: 1000V, MM: 200V-meets industrial-grade robustness requirements for handheld and embedded applications.
Propagation Delay	t_PLH/t_PHL ≤ 2.8ns at 3.3V–3.3V-supports >300MHz data rates in short-reach bidirectional interfaces.
Input Tolerance	Accepts up to 4.6V on all inputs-allows safe interfacing with higher-voltage legacy peripherals without clamping diodes.

Pinout & Package

X2-DFN0910-6 is a 0.9mm × 1.0mm, 0.4mm pitch, 6-terminal chip-scale package with bottom-side thermal pad; compatible with standard DFN reflow profiles and space-constrained mobile PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
VCCA	Supply for A-side I/O and DIR reference	Defines logic thresholds for DIR and A pin; must be stable before DIR assertion.
GND	Digital ground reference	Common return path for both domains; requires low-inductance connection to minimize noise coupling.
A	Bidirectional data I/O (VCCA-referenced)	Connects to 1.2–3.6V domain; bus-hold maintains state when un-driven.
B	Bidirectional data I/O (VCCB-referenced)	Connects to independent 1.2–3.6V domain; electrically isolated from A when in 3-state.
DIR	Direction control input (VCCA-referenced)	High = A→B; Low = B→A; no external pull-up needed due to bus hold.
VCCB	Supply for B-side I/O	Independent of VCCA; enables true dual-domain operation with separate power sequencing.

Key Features

Feature	Design Value
Dual-supply translation	Supports any combination of 1.2V–3.6V on VCCA and VCCB-eliminates need for discrete level-shifters in heterogeneous voltage systems.
Integrated bus hold	10kΩ on-chip resistor per input-removes external biasing components and reduces BOM count in battery-powered devices.
I_OFF partial-power-down	Outputs enter high-Z when either VCCA or VCCB = 0V-enables safe hot-plug and dynamic power gating in multi-rail SoCs.
High noise immunity	100mV typical hysteresis on inputs-rejects EMI-induced glitches in noisy mobile environments without additional filtering.
Low capacitance I/O	C_IO = 6.0pF (3.3V)-minimizes loading on high-speed traces and preserves signal integrity in compact RF-sensitive layouts.

Applications

Mobile SoC Interconnect

USB-C Power Delivery Interface

Use Scenario: Bidirectional signal routing between 1.2V application processor GPIO and 3.3V PMIC status lines in smartphones.

IC Role / Device Role / Timing Role: Voltage translator enabling protocol handshaking across non-matching supply rails while maintaining timing-critical ACK/NACK response windows.

Use Value: Eliminates discrete resistor networks and saves 1.2mm² PCB area versus SOT26 alternatives; supports sub-3ns propagation delay for real-time power state coordination.

Use Scenario: Isolating CC line communication between 1.8V USB-C controller and 3.3V system management unit during port power state transitions.

IC Role / Device Role / Timing Role: Direction-controlled transceiver providing galvanic separation during VCONN/VBUS sequencing; DIR synchronized to PD state machine clock.

Use Value: I_OFF prevents backfeed when VBUS is off, ensuring compliance with USB PD 3.1 sink safety requirements without added MOSFET switches.

Wearable Sensor Hub

Industrial IoT Edge Node

Use Scenario: Level-shifting I²C signals between 1.2V ultra-low-power MCU and 2.8V environmental sensor array in hearables.

IC Role / Device Role / Timing Role: Bus-hold-equipped transceiver maintaining SDA/SCL states during MCU deep-sleep cycles to avoid bus contention on wake-up.

Use Value: Reduces system current by 15µA vs. external pull-ups; enables immediate I²C arbitration post-wake without bus initialization delay.

Use Scenario: Translating SPI commands from 3.3V microcontroller to 1.8V isolated ADC in programmable logic controller modules.

IC Role / Device Role / Timing Role: Direction-controlled interface ensuring deterministic CS/CLK/MOSI timing alignment across rail boundaries under EMC stress.

Use Value: 2000V HBM rating withstands industrial ESD events; 100mV hysteresis rejects conducted noise on factory floor wiring harnesses.

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage translation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AVCH1T45DCKR	Same function but in SC70-6 package (2.0mm × 1.25mm); 15% larger footprint; no bus hold feature.	Lacks bus hold-requires external 10kΩ pull-ups on unused I²C lines, increasing layout complexity in space-constrained wearables.	Select if SC70 compatibility is mandatory and bus hold is unnecessary; not recommended for floating-input scenarios.
FXMA108MUTAG	8-bit auto-directional translator; no DIR pin; higher quiescent current (25µA vs. 10µA); supports 1.1V–3.6V.	Auto-direction eliminates DIR control logic but adds latency; unsuitable for synchronous protocols requiring precise direction timing.	Choose only for multi-bit parallel buses where direction changes infrequently; avoid for time-critical bidirectional protocols like SMBus.

Compared with SN74AVCH1T45DCKR and FXMA108MUTAG, the 74AVCH1T45FW3-7 uniquely combines minimal 0.9mm × 1.0mm footprint, guaranteed bus hold, and DIR-controlled deterministic timing-making it optimal for miniaturized, low-power, and protocol-sensitive designs.

Availability

74AVCH1T45FW3-7 is available at Aetrix Electronics and suitable for mobile SoC interconnects, USB-C power delivery interfaces, wearable sensor hubs, and industrial IoT edge nodes requiring stable component supply and long-term manufacturability.

Supply support for 74AVCH1T45FW3-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and precision timing solutions for consumer, industrial, and automotive markets.

The 74AVCH1T45 belongs to Diodes' AVCH logic family-designed specifically for ultra-low-voltage, low-power, and space-constrained applications in portable electronics where rail-to-rail translation and power-aware isolation are critical.

FAQ

What is the maximum allowable voltage on the A or B pin when VCCA or VCCB is powered down?

The 74AVCH1T45FW3-7 guarantees safe operation with up to 4.6V applied to A or B pins even when the corresponding supply (VCCA or VCCB) is at 0V. This is enabled by its I_OFF protection circuit, which blocks back-currents and maintains high-impedance output states-critical for hot-swap and partial-power-down scenarios in battery-powered systems.

Does the bus hold feature affect propagation delay or power consumption?

No-the 10kΩ bus hold resistors are only active on static inputs and do not load switching signals. Propagation delay remains unchanged (≤2.8ns at 3.3V), and quiescent current stays at 10µA max. Bus hold draws negligible current (<1µA) when holding a logic state, making it transparent to timing and power budgets in active operation.

Can DIR be driven from a different voltage domain than VCCA?

No-DIR is strictly referenced to VCCA, and its logic thresholds (VIH/VIL) scale with VCCA. Driving DIR from VCCB or another rail violates the recommended operating conditions and may cause metastability or incorrect direction control. Always tie DIR to a VCCA-synchronous control signal.

Is the X2-DFN0910-6 package compatible with standard DFN reflow profiles?

Yes-the X2-DFN0910-6 uses industry-standard JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and qualifies for standard SnPb or lead-free reflow profiles. Its 0.4mm pitch and 0.9mm × 1.0mm body align with IPC-7351B DFN0910X6 footprint guidelines, supporting automated placement and reliable solder joint formation.

74AVCH1T45FW3-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74AVCH

Package/Case:

Packaging:: Tape & Reel (TR)

Product Status:: Active

Translator Type:: Voltage Level

Channel Type:: Bidirectional

Number of Circuits:: 1

Channels per Circuit:: 1

Voltage - VCCA:: 1.2 V ~ 3.6 V

Voltage - VCCB:: 1.2 V ~ 3.6 V

Input Signal:: -

Output Signal:: -

Output Type:: Tri-State, Non-Inverted

Data Rate:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Features:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 6-XFDFN

74AVCH1T45FW3-7 FAQ

1.How can I place an order for 74AVCH1T45FW3-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AVCH1T45FW3-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74AVCH1T45FW3-7 reliable?

The price and inventory of 74AVCH1T45FW3-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVCH1T45FW3-7 is usually 5 days.

3.What payment methods are accepted for 74AVCH1T45FW3-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVCH1T45FW3-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AVCH1T45FW3-7?

74AVCH1T45FW3-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AVCH1T45FW3-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74AVCH1T45FW3-7?

For technical support, including 74AVCH1T45FW3-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVCH1T45FW3-7 requirements.

6.How does Aetrix verify that 74AVCH1T45FW3-7 is sourced from the original manufacturer or authorized distributors?

All 74AVCH1T45FW3-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74AVCH1T45FW3-7 meets industry standards.

7.What is the process for return or replacement of 74AVCH1T45FW3-7?

All 74AVCH1T45FW3-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVCH1T45FW3-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74AVCH1T45FW3-7 part is unused and in its original packaging.

Return procedure for 74AVCH1T45FW3-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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