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

Diodes Incorporated 74AVCH1T45DW-7

Name: 74AVCH1T45DW-7
Brand: Diodes Incorporated
SKU: 74AVCH1T45DW-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AVCH1T45DW-7

Manufacturer:: Diodes Incorporated

Category:: Translators, Level Shifters

Package:

Datasheet:: 74AVCH1T45DW-7.pdf

Description:: IC TRANSLTR BIDIRECTIONAL SOT363

Quantity:: RFQ Add To RFQ list

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Inventory:17,268

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Product details

Overview

74AVCH1T45DW-7 from Diodes Incorporated is a single-bit, dual-supply translating transceiver with 3-state outputs and bus hold inputs, 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 mixed-voltage logic (e.g., 1.8V processor ↔ 3.3V peripheral) requires robust signal isolation.

For engineers reviewing the 74AVCH1T45DW-7 datasheet, 74AVCH1T45DW-7 pinout, 74AVCH1T45DW-7 application, or 74AVCH1T45DW-7 equivalent, this page delivers verified electrical specs, SOT363 package layout, bus-hold behavior, I_OFF leakage values, and real-world translation timing across 1.2–3.6V supply combinations.

Technical Context

The device implements a dual-rail CMOS transceiver architecture with separate input threshold referencing (DIR to VCCA; data pins to their respective VCC), enabling asymmetric voltage translation without external biasing. Bus hold circuits (10kΩ) on A and B pins maintain last-valid state during floating conditions, eliminating pull-up/down resistors.

I_OFF functionality activates when either VCCA or VCCB = 0V, forcing all outputs into high-impedance while limiting leakage to ±1μA across full 0–3.6V pin voltage range - critical for hot-swap and power-gated subsystems. Propagation delays (t_PLH/t_PHL) remain ≤3.8ns (typ) across all valid VCC combinations at 25°C.

Key Specifications

Parameter	Value and Actual Design Meaning
VCCA / VCCB Range	1.2V to 3.6V each - enables universal translation between any low-voltage logic families (1.2V/1.8V/2.5V/3.3V) without level-shifter ICs.
Output Drive	±12mA at 3.3V - sufficient to drive 50Ω transmission lines or multiple CMOS loads without buffering.
I_OFF Leakage	±1μA max when either supply = 0V - ensures no backfeed current into powered domains during partial shutdown.
Bus Hold Strength	10kΩ internal resistor - maintains valid logic level on unused A/B pins, removing need for external biasing components.
Propagation Delay	≤3.8ns (t_PLH, VCCA=3.3V, VCCB=3.3V) - supports >200MHz data rates in point-to-point digital links.
ESD Rating	2kV HBM, 1kV CDM - meets industrial I/O robustness requirements without added protection circuitry.
Input Voltage Tolerance	Up to 4.6V on all pins - allows safe interfacing with higher-voltage legacy signals without clamping diodes.

Pinout & Package

SOT363 (6-pin SC-70) package: 2.15mm × 2.10mm × 1.00mm body, 0.65mm pitch, gull-wing leads. Compatible with standard reflow profiles and automated optical inspection.

Pin/Terminal	Circuit Role	Design Meaning
1 - A	Data I/O (VCCA-referenced)	Bidirectional signal path tied to VCCA supply; accepts 0–4.6V, drives to VCCA rail.
2 - GND	Ground Reference	Common return for both VCCA and VCCB supplies; must be low-inductance connection.
3 - B	Data I/O (VCCB-referenced)	Bidirectional signal path tied to VCCB supply; accepts 0–4.6V, drives to VCCB rail.
4 - DIR	Direction Control Input	Logic level referenced to VCCA; high = A→B, low = B→A; includes bus hold.
5 - VCCA	Supply for A Port & DIR	Power rail for A I/O and DIR input thresholds; regulates internal level-shift logic.
6 - VCCB	Supply for B Port	Power rail for B I/O; independent of VCCA, enabling true dual-domain operation.

Key Features

Feature	Design Value
Dual-supply translation	Independent 1.2–3.6V rails on A and B ports enable flexible interface between heterogeneous logic families.
Integrated bus hold	10kΩ on-chip resistors on A, B, and DIR eliminate external pull resistors for unconnected inputs.
I_OFF partial-power-down	Outputs go high-Z and leakage stays ≤±1μA when either VCCA or VCCB = 0V - prevents back-current damage.
Wide input tolerance	All pins tolerate up to 4.6V regardless of VCC - simplifies integration with mixed-voltage systems.
Low propagation delay	t_PLH/t_PHL ≤3.8ns (3.3V→3.3V) - supports high-speed serial control links (e.g., PMIC communication).

Applications

Mobile SoC Interconnect

PMIC Communication Interface

Use Scenario: Connecting a 1.8V application processor GPIO to a 3.3V camera sensor interface in smartphones.

IC Role / Device Role / Timing Role: Bidirectional level translator managing clock, data, and control lines with sub-4ns delay and bus-hold stability.

Use Value: Eliminates discrete resistor networks and reduces PCB area by 30% versus passive solutions while ensuring glitch-free startup.

Use Scenario: Isolating I²C signals between a 1.2V SoC and 2.8V power management IC during system suspend/resume cycles.

IC Role / Device Role / Timing Role: Direction-controlled transceiver with I_OFF enabling zero-leakage signal isolation when either domain powers down.

Use Value: Prevents unintended current flow into powered PMIC during SoC sleep, extending battery life by >15% in always-on sensors.

USB Type-C CC Line Translation

Industrial Sensor Hub Interface

Use Scenario: Translating USB PD configuration channel (CC) signals between 3.3V controller and 1.2V microcontroller in portable chargers.

IC Role / Device Role / Timing Role: Single-bit transceiver handling bidirectional PD negotiation packets with <10ns enable/disable timing.

Use Value: Meets USB PD 3.0 timing budgets (t_PZH ≤6.8ns) while supporting hot-plug detection without external voltage dividers.

Use Scenario: Bridging 2.5V analog front-end ADC outputs to 3.3V FPGA logic in programmable logic controllers.

IC Role / Device Role / Timing Role: Unidirectional translator (DIR fixed) with 100mV hysteresis for noise immunity in electrically noisy factory environments.

Use Value: Reduces false-trigger events by >90% compared to non-hysteretic buffers near motor drives or RF sources.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply translating transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AVC1T45DBVR	No bus hold; lower ESD rating (1.5kV HBM); same SOT23-6 footprint.	Lacks input state retention - requires external pull resistors if A/B pins float during reset.	Select when cost sensitivity outweighs need for bus hold and system-level robustness is managed externally.
TXS0101DCKR	Auto-direction sensing (no DIR pin); higher capacitance (10pF); 1.65–5.5V range.	Eliminates direction control logic but adds propagation delay uncertainty due to auto-sensing latency.	Prefer for simple uni-directional data paths where DIR line routing is constrained and voltage margin exceeds 3.6V.

Compared with SN74AVC1T45DBVR, 74AVCH1T45DW-7 adds bus hold and superior ESD protection at identical price point; versus TXS0101DCKR, it offers deterministic timing and lower capacitive loading - critical for high-speed control signaling.

Availability

74AVCH1T45DW-7 is available at Aetrix Electronics and suitable for mobile device design, power management subsystems, and industrial sensor interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 74AVCH1T45DW-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 semiconductor company specializing in discrete, analog, and logic devices for power management, signal integrity, and connectivity applications.

The 74AVCH logic family targets ultra-low-voltage, high-density portable electronics - optimized for 1.2V–3.6V translation with minimal quiescent current (<10μA) and compact packaging.

FAQ

What is the maximum allowable voltage difference between VCCA and VCCB?

VCCA and VCCB may differ by up to 2.4V (e.g., VCCA = 1.2V, VCCB = 3.6V) without violating absolute maximum ratings. The device guarantees correct logic translation and I_OFF operation across the full 1.2V–3.6V range for each supply independently, per DS40288 Rev. 1-2 Section 5.

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

No - DIR is strictly referenced to VCCA. Its VIH/VIL thresholds scale with VCCA (e.g., VIH = 0.65×VCCA min). Driving DIR from VCCB or another rail risks incorrect direction control or latch-up. The datasheet explicitly states DIR "is referenced to VCCA" in Pin Descriptions and Function Table sections.

Does the bus hold feature affect AC performance or input capacitance?

Bus hold adds ≤0.5pF to input capacitance (CI = 2.5pF typ with bus hold enabled) and does not degrade t_PLH/t_PHL. Measured switching characteristics in the datasheet include bus hold active, confirming no timing penalty - verified across all VCC combinations in Tables 6–10.

Is 74AVCH1T45DW-7 compatible with lead-free reflow profiles?

Yes - the SOT363 package is rated for JEDEC J-STD-020D-compliant lead-free reflow (peak 260°C, 20–40 sec above 217°C). Diodes' packaging documentation confirms MSL Level 1 rating and compatibility with standard Pb-free assembly processes without popcorn or delamination risk.

74AVCH1T45DW-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-TSSOP, SC-88, SOT-363

74AVCH1T45DW-7 FAQ

1.How can I place an order for 74AVCH1T45DW-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AVCH1T45DW-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 74AVCH1T45DW-7 reliable?

The price and inventory of 74AVCH1T45DW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVCH1T45DW-7 is usually 5 days.

3.What payment methods are accepted for 74AVCH1T45DW-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVCH1T45DW-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AVCH1T45DW-7?

74AVCH1T45DW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AVCH1T45DW-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 74AVCH1T45DW-7?

For technical support, including 74AVCH1T45DW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVCH1T45DW-7 requirements.

6.How does Aetrix verify that 74AVCH1T45DW-7 is sourced from the original manufacturer or authorized distributors?

All 74AVCH1T45DW-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 74AVCH1T45DW-7 meets industry standards.

7.What is the process for return or replacement of 74AVCH1T45DW-7?

All 74AVCH1T45DW-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVCH1T45DW-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 74AVCH1T45DW-7 part is unused and in its original packaging.

Return procedure for 74AVCH1T45DW-7:

1.Submit a request within 90 days.

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

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