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

Diodes Incorporated 74LVC2T45RA3-7

Name: 74LVC2T45RA3-7
Brand: Diodes Incorporated
SKU: 74LVC2T45RA3-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVC2T45RA3-7

Manufacturer:: Diodes Incorporated

Category:: Translators, Level Shifters

Package:

Datasheet:: 74LVC2T45RA3-7.pdf

Description:: IC TRANSLATOR BIDIR X2DFN1210-8

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Product details

Overview

74LVC2T45RA3-7 from Diodes Incorporated is a dual-bit, dual-supply translating transceiver with tri-state outputs, enabling bidirectional voltage-level translation between independent 1.2V–5.5V domains. It features separate VCC(A) and VCC(B) supplies, DIR-controlled port directionality (A↔B), ±24mA drive at 3.3V, and I_OFF protection that isolates ports when either supply drops to 0V-used in mobile SoC interconnects between 1.8V application processors and 3.3V peripherals.

For engineers reviewing the 74LVC2T45RA3-7 datasheet, 74LVC2T45RA3-7 pinout, 74LVC2T45RA3-7 application, or 74LVC2T45RA3-7 equivalent, key selection criteria include dual-rail translation range (1.2V–5.5V), 420Mbps max data rate (3.3V→5V), I_OFF behavior under partial power-down, thermal resistance (133°C/W for X2-DFN1410-8), and guaranteed operation from –40°C to +125°C.

Technical Context

This device implements a direction-controlled, dual-rail CMOS transceiver architecture where DIR selects whether 1A/2A act as inputs and 1B/2B as outputs (DIR = HIGH), or vice versa (DIR = LOW). Each port references its own VCC, enabling asymmetric translation-e.g., 1.8V logic on Port A to 3.3V logic on Port B-without level-shifting resistors or external bias.

I_OFF circuitry actively disables all I/O paths when either VCC(A) or VCC(B) reaches 0V, limiting backflow current to ±2μA across –40°C to +125°C and supporting hot-insertion and power-gating scenarios. Input tolerance extends to 5.5V regardless of VCC level, and propagation delays are characterized down to 1.2V supply with sub-10ns typical t_pLH/t_pHL at 3.3V→3.3V.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range (A/B)	1.2V to 5.5V each-enables translation between any two logic domains in modern low-voltage systems without external regulators.
Max Data Rate	420Mbps (3.3V→5V)-supports high-speed interface bridging such as SDIO, I²C fast-mode+, or GPIO expansion in portable devices.
Output Drive	±24mA at 3.3V-drives standard CMOS loads with margin, eliminating need for buffer stages in point-to-point links.
I_OFF Leakage	±2μA max when either VCC = 0V-ensures electrical isolation during partial power-down, preventing bus contention or latch-up.
Operating Temp	–40°C to +125°C-qualified for automotive cabin and industrial control environments requiring extended thermal robustness.
ESD Rating	4kV HBM, 1kV CDM-meets IEC 61000-4-2 system-level ESD immunity requirements for handheld and embedded applications.
Package	X2-DFN1410-8 (1.4mm × 1.0mm, 0.5mm pitch)-ultra-compact footprint ideal for space-constrained mobile PCBs and wearables.

Pinout & Package

X2-DFN1410-8 package: 1.4mm × 1.0mm body, 0.5mm lead pitch, exposed thermal pad (pin 5), moisture sensitivity level 1 (MSL1).

Pin/Terminal	Circuit Role	Design Meaning
1B	Port B Data I/O	Bidirectional signal path referenced to VCC(B); tolerates up to 5.5V input regardless of VCC(B) level.
GND	Ground Reference	Common return for both supply domains; must be low-impedance to minimize ground bounce during switching.
2B	Port B Data I/O	Second bidirectional signal path on Port B; shares same VCC(B) and timing characteristics as 1B.
VCC(A)	Port A Supply	Power rail for 1A/2A pins and DIR input; defines logic thresholds and output swing for Port A.
1A	Port A Data I/O	Bidirectional signal path referenced to VCC(A); supports 1.2V–5.5V logic levels independently of Port B.
2A	Port A Data I/O	Second bidirectional signal path on Port A; electrically identical to 1A with matched delay and drive.
DIR	Direction Control	Active-HIGH control: HIGH enables A→B data flow; LOW enables B→A; referenced to VCC(A).
VCC(B)	Port B Supply	Power rail for 1B/2B pins; decoupling required near package to maintain signal integrity at high data rates.

Key Features

Feature	Design Value
Dual independent supply rails	VCC(A) and VCC(B) operate from 1.2V to 5.5V-eliminates need for external level shifters in mixed-voltage SoC subsystems.
Direction-controlled bidirectional flow	SINGLE DIR pin configures data path A→B or B→A-reduces control logic overhead vs. per-signal direction registers.
I_OFF partial-power-down protection	Automatic high-impedance state when either VCC = 0V-prevents back-current damage and maintains signal isolation during power sequencing.
5.5V-tolerant inputs	All inputs accept 0V–5.5V regardless of VCC level-simplifies interface to legacy 5V peripherals without clamping diodes.
Low dynamic power	16µA max ICC at 25°C-reduces quiescent load on battery-backed or energy-harvested subsystems.

Applications

Mobile SoC Interconnect

Industrial Sensor Hub Interface

Use Scenario: Connecting a 1.8V application processor GPIO bank to a 3.3V camera module interface in a smartphone.

IC Role / Device Role / Timing Role: Bidirectional voltage translator managing clock, data, and control lines with DIR synchronized to burst transfer mode.

Use Value: Enables direct integration without discrete FET-based translators, reducing BOM count and PCB area while maintaining 210Mbps throughput.

Use Scenario: Isolating RS-485 transceiver control signals (1.2V MCU) from 5V fieldbus PHY in a programmable logic controller.

IC Role / Device Role / Timing Role: Level-shifting enable and status lines with I_OFF ensuring no leakage into powered-down PHY during maintenance mode.

Use Value: Guarantees safe hot-swap capability and eliminates risk of damaging 1.2V GPIOs during 5V PHY power cycling.

Automotive Infotainment Display Link

Wearable Health Monitor Data Bridge

Use Scenario: Bridging 2.5V display controller LVDS timing signals to 1.2V MIPI DSI host processor in a digital instrument cluster.

IC Role / Device Role / Timing Role: Low-skew, dual-channel translator preserving setup/hold margins for pixel clock and data lanes.

Use Value: Achieves <7ns max skew between channels at 140Mbps (2.5V→1.2V), meeting MIPI D-PHY v1.2 timing compliance.

Use Scenario: Interfacing a 1.5V biosensor ASIC to a 3.3V Bluetooth LE radio SoC in a compact ECG patch.

IC Role / Device Role / Timing Role: Ultra-low-power bidirectional bridge for I²C sensor register access and firmware updates.

Use Value: Draws only 4µA total ICC across both rails at 1.5V/3.3V, extending coin-cell battery life beyond 6 months.

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
TXS0102DCUR	TI part uses auto-direction sensing (no DIR pin); lower drive (±8mA); 1.65V–5.5V VCC range; larger X2SON-8 (1.5mm × 1.0mm).	Preferred for I²C/SMBus where direction is data-dependent; unsuitable for DIR-synchronized burst transfers like SDIO.	Select when automatic direction detection is required and drive strength >±8mA is not needed.
SN74AVC2T245RSWR	TI part requires external DIR control; higher drive (±12mA); 1.2V–3.6V VCC range; same X2-DFN1410-8 package.	Limited to ≤3.6V domains; lacks 5.5V input tolerance; better for cost-sensitive consumer apps with tighter voltage constraints.	Select when operating strictly within 1.2V–3.6V and 5.5V tolerance is unnecessary.

Compared with TXS0102DCUR and SN74AVC2T245RSWR, the 74LVC2T45RA3-7 uniquely supports full 1.2V–5.5V translation on both sides, delivers ±24mA drive for marginal loads, and guarantees I_OFF isolation at 0V VCC-making it optimal for automotive and industrial designs requiring wide voltage interoperability and robust power sequencing.

Availability

74LVC2T45RA3-7 is available at Aetrix Electronics and suitable for mobile device integration, automotive infotainment interfaces, and industrial sensor hub designs requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74LVC2T45RA3-7 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-reliability, low-power solutions for automotive, industrial, and consumer markets.

The 74LVC2T45 belongs to Diodes' LVC logic family-designed specifically for ultra-low-voltage translation in space-constrained, thermally demanding applications where traditional TTL or CMOS buffers fail.

FAQ

Can 74LVC2T45RA3-7 translate between 1.2V and 5.0V simultaneously?

Yes. VCC(A) can be set to 1.2V while VCC(B) is set to 5.0V, enabling bidirectional translation with guaranteed VIH/VIL thresholds and 75Mbps data rate (1.2V→5.0V). Inputs tolerate up to 5.5V, so 5.0V signals applied to Port B are safe even when VCC(B) = 5.0V.

What happens to outputs when DIR is floating?

DIR is referenced to VCC(A) and has no internal pull-up/down. A floating DIR causes undefined port direction and potential bus contention. Diodes recommends tying DIR to VCC(A) or GND via a 10kΩ resistor; the datasheet specifies VIH ≥0.7×VCC(A) and VIL ≤0.3×VCC(A) for reliable operation.

Does the X2-DFN1410-8 package require solder paste stencil adjustments?

Yes. The 0.5mm pitch and 0.2mm-thick copper thermal pad demand precise stencil aperture design: 0.15mm thickness, 0.35mm × 0.35mm openings for signal pads, and 0.25mm × 0.25mm for the center thermal pad. Reflow profile must peak at 260°C for 10 seconds to ensure void-free thermal pad wetting.

How does I_OFF behave if only VCC(A) is powered?

When VCC(A) = 0V and VCC(B) = 3.3V, all Port A pins (1A, 2A, DIR) enter high-impedance with ±2μA leakage; Port B remains fully functional. This allows safe isolation of the A-side logic while keeping B-side peripherals active-critical for modular power architectures in medical and test equipment.

74LVC2T45RA3-7 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:: 2

Voltage - VCCA:: 1.2 V ~ 5.5 V

Voltage - VCCB:: 1.2 V ~ 5.5 V

Input Signal:: -

Output Signal:: -

Output Type:: Tri-State, Non-Inverted

Data Rate:: 420Mbps

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

Grade:: -

Qualification:: -

Features:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-XFDFN

74LVC2T45RA3-7 FAQ

1.How can I place an order for 74LVC2T45RA3-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVC2T45RA3-7 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 74LVC2T45RA3-7 reliable?

The price and inventory of 74LVC2T45RA3-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC2T45RA3-7 is usually 5 days.

3.What payment methods are accepted for 74LVC2T45RA3-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC2T45RA3-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVC2T45RA3-7?

74LVC2T45RA3-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVC2T45RA3-7 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 74LVC2T45RA3-7?

For technical support, including 74LVC2T45RA3-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC2T45RA3-7 requirements.

6.How does Aetrix verify that 74LVC2T45RA3-7 is sourced from the original manufacturer or authorized distributors?

All 74LVC2T45RA3-7 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 74LVC2T45RA3-7 meets industry standards.

7.What is the process for return or replacement of 74LVC2T45RA3-7?

All 74LVC2T45RA3-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC2T45RA3-7, 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 74LVC2T45RA3-7 part is unused and in its original packaging.

Return procedure for 74LVC2T45RA3-7:

1.Submit a request within 90 days.

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

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