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

Diodes Incorporated 74LVC1T45DW-7

Name: 74LVC1T45DW-7
Brand: Diodes Incorporated
SKU: 74LVC1T45DW-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVC1T45DW-7

Manufacturer:: Diodes Incorporated

Category:: Translators, Level Shifters

Package:

Datasheet:: 74LVC1T45DW-7.pdf

Description:: IC TRANSLTR BIDIRECTIONAL SOT363

Quantity:: RFQ Add To RFQ list

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Inventory:10,959

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Product details

Overview

74LVC1T45DW-7 from Diodes Incorporated is a single-bit, dual-supply translating transceiver with 3-state outputs, designed for bidirectional voltage-level translation between independent 1.65V–5.5V domains. It features A/B I/O pins referenced to separate VCCA and VCCB supplies, DIR-controlled directionality, ±24mA drive at 3.3V, and I_OFF protection enabling safe power-down isolation. It is used in mobile device interconnects where 1.8V SoC interfaces with 3.3V peripherals.

For engineers reviewing the 74LVC1T45DW-7 datasheet, 74LVC1T45DW-7 pinout, 74LVC1T45DW-7 application, or 74LVC1T45DW-7 equivalent, this page delivers verified electrical specs, package mapping to SOT363, real-world use cases in battery-powered electronics, and validated alternative parts with documented functional trade-offs.

Technical Context

The device implements a dual-rail CMOS transceiver architecture with direction control referenced to VCCA. Signal flow is dynamically reversible: high DIR enables A→B translation, low DIR enables B→A translation. Both A and B pins tolerate up to 5.5V regardless of supply voltage, supporting mixed-voltage system interfacing without external biasing.

I_OFF circuitry activates when either VCCA or VCCB drops to 0V, forcing all outputs into high-impedance while blocking backflow currents up to 5.5V-critical for hot-swap and partial-power-down operation. Input hysteresis (100mV typical) ensures noise immunity in noisy portable environments.

Key Specifications

Parameter	Value and Actual Design Meaning
VCCA Range	1.65V to 5.5V - supports logic domains from 1.8V microcontrollers to 5V legacy peripherals
VCCB Range	1.65V to 5.5V - independent rail allows asymmetric translation (e.g., 1.8V ↔ 3.3V)
Output Drive	±24mA at 3.3V - sufficient to drive 50Ω transmission lines or multiple LVC loads without buffering
I_OFF Leakage	±2μA max at 0V supply - guarantees no backfeed current during power sequencing or shutdown
Propagation Delay	0.7–17.7ns (A↔B), 1.1–23.7ns (DIR→output) - meets timing budgets for USB, SDIO, and I²C auxiliary signal routing
ESD Rating	2kV HBM, 1kV CDM - exceeds JEDEC standards for handheld and portable equipment handling
Operating Temp	−40°C to +125°C - qualified for automotive infotainment and industrial edge node deployment

Pinout & Package

SOT363 (SC-88) 6-pin package: ultra-compact surface-mount footprint (2.15mm × 2.10mm × 0.95mm), optimized for space-constrained mobile PCBs. Exposed pad variant not present; standard plastic body with gull-wing leads.

Pin/Terminal	Circuit Role	Design Meaning
1 - GND	Ground reference	Common return path for both VCCA and VCCB supplies; must be low-inductance connection
2 - A	Bi-directional I/O (VCCA-referenced)	Connects to lower-voltage domain (e.g., 1.8V processor GPIO); accepts 0–5.5V inputs
3 - B	Bi-directional I/O (VCCB-referenced)	Connects to higher-voltage domain (e.g., 3.3V sensor interface); tolerates 0–5.5V
4 - DIR	Direction control input	Logic level referenced to VCCA; high = A→B, low = B→A; no pull-up required
5 - VCCA	Supply for A port and DIR input	Powers A I/O buffer and sets logic threshold for DIR; decoupling capacitor mandatory
6 - VCCB	Supply for B port	Powers B I/O buffer only; independent of VCCA, enabling true dual-rail operation

Key Features

Feature	Design Value
Dual-supply translation	Enables interoperability between 1.65V–5.5V logic families without level-shifter ICs or discrete solutions
I_OFF partial-power-down	Prevents damaging current flow when one domain powers off first-essential for battery-backed subsystems
5.5V-tolerant inputs	A and B pins accept up to 5.5V regardless of VCCA/VCCB, simplifying interface to legacy 5V signals
Low ICC (≤3μA)	Reduces quiescent current in always-on system management rails (e.g., PMIC monitoring paths)
Hysteresis (100mV typ)	Rejects noise on DIR or data lines in electrically noisy environments like display or audio subsystems

Applications

Mobile Device Power Sequencing

USB OTG Signal Routing

Use Scenario: Coordinating power-up sequence between an application processor (1.8V) and a USB PHY (3.3V) during boot.

IC Role / Device Role / Timing Role: Bidirectional level translator isolating VBUS detection and ID pin signals during partial power states.

Use Value: Eliminates need for discrete MOSFET translators; I_OFF prevents backfeed when PHY is unpowered but processor is active.

Use Scenario: Routing ID and VBUS sense lines between dual-role USB controllers and connectors in smartphones.

IC Role / Device Role / Timing Role: Translates 1.8V ID pin state from AP to 3.3V USB switch while maintaining fast edge integrity.

Use Value: Meets USB 2.0 rise/fall time requirements (<10ns) across voltage domains without added propagation delay.

SD Card Interface Voltage Adaptation

Industrial Sensor Hub Interfacing

Use Scenario: Connecting a 3.3V SD host controller to a 1.8V SD card in embedded storage modules.

IC Role / Device Role / Timing Role: Direction-controlled data lane translator synchronized to CMD/DAT clock edges.

Use Value: Supports UHS-I mode timing (≤8ns propagation) while tolerating SD card hot-plug voltage transients.

Use Scenario: Interfacing a 5V industrial analog sensor output to a 3.3V microcontroller ADC input.

IC Role / Device Role / Timing Role: Unidirectional level shifter (B→A) with ESD-hardened I/O protecting MCU GPIOs.

Use Value: 2kV HBM rating withstands field-induced ESD events common in factory-floor wiring harnesses.

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-bit bidirectional translation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TXS0101DCKR	Auto-direction sensing (no DIR pin); lower drive (±2mA); 1.65–5.5V rails	Eliminates DIR control logic but lacks deterministic direction control for synchronous protocols	Choose for simple push-pull GPIO translation where direction is data-driven, not command-driven
SN74AVC1T45DBVR	Higher speed (tpd ≤4.4ns @3.3V); same pinout; identical I_OFF and voltage ranges	Better suited for high-frequency SPI or MIPI D-PHY auxiliary lanes requiring sub-5ns delays	Choose when propagation delay is critical and TI's qualification profile aligns with your production requirements

Compared with TXS0101DCKR, 74LVC1T45DW-7 provides precise DIR-based control essential for protocol-compliant bidirectional buses; compared with SN74AVC1T45DBVR, it offers broader temperature range (−40°C to +125°C vs. −40°C to +85°C) and superior thermal resistance in SOT363 (371°C/W vs. ~320°C/W).

Availability

74LVC1T45DW-7 is available at Aetrix Electronics and suitable for mobile device design, industrial sensor interface, and USB peripheral integration requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74LVC1T45DW-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 mixed-signal solutions for power management, signal integrity, and connectivity applications.

The 74LVC logic family targets low-voltage, high-speed digital interfacing in portable and battery-operated systems, emphasizing rail-to-rail compatibility, low static current, and robust ESD performance.

FAQ

Can 74LVC1T45DW-7 translate between 1.2V and 3.3V domains?

No. The absolute minimum VCCA and VCCB is 1.65V per datasheet Section 7 (Recommended Operating Conditions). Operation below 1.65V violates specification and may result in undefined logic thresholds, increased propagation delay, or failure to maintain I_OFF behavior during power-down.

Is external pull-up or pull-down required on the DIR pin?

No. DIR is a CMOS input referenced to VCCA with guaranteed VIH/VIL thresholds across all supported VCCA voltages (e.g., VIH ≥0.65×VCCA at 1.65–1.95V). A direct connection to VCCA (for high) or GND (for low) suffices; no passive termination is needed.

What is the maximum capacitive load the 74LVC1T45DW-7 can drive reliably?

Based on switching characteristics and output drive capability, the device supports ≤30pF load capacitance while maintaining specified t_PLH/t_PHL and signal integrity. Driving >30pF (e.g., long traces or multiple loads) requires series termination or buffer amplification to avoid excessive rise/fall times and overshoot.

Does the SOT363 package include an exposed thermal pad?

No. The SOT363 (SC-88) package for 74LVC1T45DW-7 has no exposed pad. Thermal dissipation relies solely on lead-frame conduction through pins 1 (GND), 5 (VCCA), and 6 (VCCB). PCB layout must provide adequate copper area on these pads to achieve θ_JA = 371°C/W as specified.

74LVC1T45DW-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74LVC

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:: 1.65 V ~ 5.5 V

Voltage - VCCB:: 1.65 V ~ 5.5 V

Input Signal:: -

Output Signal:: -

Output Type:: Tri-State, Non-Inverted

Data Rate:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Features:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 6-TSSOP, SC-88, SOT-363

74LVC1T45DW-7 FAQ

1.How can I place an order for 74LVC1T45DW-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVC1T45DW-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 74LVC1T45DW-7 reliable?

The price and inventory of 74LVC1T45DW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1T45DW-7 is usually 5 days.

3.What payment methods are accepted for 74LVC1T45DW-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1T45DW-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVC1T45DW-7?

74LVC1T45DW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVC1T45DW-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 74LVC1T45DW-7?

For technical support, including 74LVC1T45DW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1T45DW-7 requirements.

6.How does Aetrix verify that 74LVC1T45DW-7 is sourced from the original manufacturer or authorized distributors?

All 74LVC1T45DW-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 74LVC1T45DW-7 meets industry standards.

7.What is the process for return or replacement of 74LVC1T45DW-7?

All 74LVC1T45DW-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1T45DW-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 74LVC1T45DW-7 part is unused and in its original packaging.

Return procedure for 74LVC1T45DW-7:

1.Submit a request within 90 days.

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

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