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

Diodes Incorporated 74LVC2T45HK3-7

Name: 74LVC2T45HK3-7
Brand: Diodes Incorporated
SKU: 74LVC2T45HK3-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVC2T45HK3-7

Manufacturer:: Diodes Incorporated

Category:: Translators, Level Shifters

Package:

Datasheet:: 74LVC2T45HK3-7.pdf

Description:: IC TRANSLATOR BIDIR X2DFN1410-8

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Inventory:23,343

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Product details

Overview

74LVC2T45HK3-7 from Diodes Incorporated is a dual-bit, dual-supply translating transceiver with 3-state outputs, enabling bidirectional voltage-level translation between independent 1.2V–5.5V domains. It features DIR-controlled port directionality (A↔B), ±24mA drive at 3.3V, I_OFF power-down isolation, and operates from –40°C to +125°C. It is used in mobile SoC interconnects where 1.8V GPU interfaces communicate with 3.3V peripheral controllers.

For engineers reviewing the 74LVC2T45HK3-7 datasheet, 74LVC2T45HK3-7 pinout, 74LVC2T45HK3-7 application, or 74LVC2T45HK3-7 equivalent, key selection criteria include dual-rail supply flexibility, guaranteed 420Mbps data rate (3.3V→5V), I_OFF behavior during partial power-down, and DFN1410-8 thermal performance (θ_JA = 133°C/W).

Technical Context

This device implements a direction-controlled, dual-rail CMOS transceiver architecture: V_CC(A) powers pins 1A, 2A, and DIR; V_CC(B) powers pins 1B and 2B; GND is common. Logic thresholds scale with respective V_CC rails-e.g., VIH for DIR is 0.8×V_CC(A) at 1.2V, 2.0V at 3.3V.

Tri-state control is synchronized to DIR state, while I_OFF activates automatically when either V_CC drops to 0V, forcing all I/O pins into high-impedance with ≤±10μA leakage up to 5.5V. Propagation delays are asymmetric: B→A is faster than A→B under identical V_CC conditions due to internal driver tuning.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Range	V_CC(A) and V_CC(B) independently support 1.2V to 5.5V-enables mixed-voltage SoC-to-peripheral bridging without level-shifter ICs.
Max Data Rate	420Mbps (3.3V→5V translation)-supports high-speed UART, I²C fast-mode+, and low-latency GPIO expansion links.
Output Drive	±24mA at 3.3V-drives 50Ω transmission lines or multiple 74LVC inputs without external buffers.
I_OFF Leakage	≤±10μA when either V_CC = 0V-prevents back-current damage and maintains signal integrity during domain power sequencing.
Operating Temp	–40°C to +125°C-qualified for automotive infotainment and industrial edge controller applications.
ESD Rating	4kV HBM, 1kV CDM-meets IEC 61000-4-2 system-level robustness requirements for handheld and portable designs.
Package Thermal R_JA	133°C/W (X2-DFN1410-8)-enables 16μA typical ICC operation without heatsinking in space-constrained PCB layouts.

Pinout & Package

X2-DFN1410-8 (1.4mm × 1.0mm, 0.5mm pitch, exposed thermal pad) - ultra-compact, low-inductance package optimized for high-density mobile PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1B	Data I/O (Port B)	Bi-directional signal terminal referenced to V_CC(B); logic levels track V_CC(B) supply.
GND	Ground Reference	Common return path for both supply domains; must be low-impedance to minimize ground bounce across translation paths.
2B	Data I/O (Port B)	Second bi-directional signal terminal on Port B; shares V_CC(B) and timing characteristics with 1B.
1A	Data I/O (Port A)	Bi-directional signal terminal referenced to V_CC(A); supports independent voltage domain translation.
2A	Data I/O (Port A)	Second bi-directional signal terminal on Port A; electrically isolated from Port B except through transceiver logic.
DIR	Direction Control Input	Active-HIGH selects A→B data flow; active-LOW selects B→A; threshold scales with V_CC(A).
V_CC(A)	Port A Supply	Powers internal logic for DIR and Port A drivers/receivers; defines VIH/VIL for DIR and A-side signals.
V_CC(B)	Port B Supply	Powers Port B drivers/receivers; defines VIH/VIL for B-side signals and output swing compliance.

Key Features

Feature	Design Value
Dual independent supply rails	V_CC(A) and V_CC(B) each support 1.2V–5.5V-eliminates need for external LDOs or charge pumps in multi-voltage systems.
Asymmetric propagation delay	tpLH(B→A) = 5.1ns @ 5V, tpLH(A→B) = 5.3ns @ 5V-minimizes skew in full-duplex bidirectional links like SDIO or eMMC command/data lanes.
I_OFF partial-power-down	Automatic high-Z on all pins when either V_CC = 0V-enables safe hot-plug of modules and clean power sequencing in battery-backed subsystems.
Input overvoltage tolerance	VI up to 5.5V regardless of V_CC-allows direct connection to legacy 5V logic without external clamping diodes.
Low dynamic power	ICC ≤ 16μA (A+B ports, 1.2V–5.5V)-reduces quiescent current in always-on sensor hub or real-time clock backup domains.

Applications

Mobile SoC Interconnect

Automotive Infotainment

Use Scenario: Connecting a 1.8V application processor's GPIO bank to a 3.3V CAN transceiver interface.

IC Role / Device Role / Timing Role: Bidirectional level translator managing command/status handshaking with sub-10ns propagation delay asymmetry.

Use Value: Eliminates discrete resistor-divider or MOSFET-based solutions, reducing BOM count and PCB area by >60%.

Use Scenario: Isolating a 5V display backlight controller from a 1.2V ADAS vision processor during sleep mode.

IC Role / Device Role / Timing Role: I_OFF-enabled signal gate that blocks leakage when V_CC(B) is powered down, preserving battery life.

Use Value: Achieves <10μA system standby current-meets ISO 16750-2 quiescent load requirements for parked vehicle mode.

Industrial PLC I/O Expansion

Wearable Sensor Hub

Use Scenario: Bridging a 2.5V FPGA configuration bus to 5V analog front-end ADCs in modular I/O cards.

IC Role / Device Role / Timing Role: Dual-bit translator supporting hot-swap detection via DIR-controlled direction reversal during module insertion.

Use Value: Enables plug-and-play field upgrades without firmware reflash or manual jumper configuration.

Use Scenario: Level-shifting I²C signals between a 1.2V ultra-low-power MCU and 1.8V environmental sensors.

IC Role / Device Role / Timing Role: Low-capacitance (6.0pF I/O), 16μA ICC translator preserving battery runtime in coin-cell-powered devices.

Use Value: Extends typical wearable battery life from 7 to >14 days by minimizing translation overhead in sleep cycles.

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
SN74LVC2T45DCTR	Same logic function and pinout; SO-8 package (4.9mm × 3.9mm) vs. X2-DFN1410-8 (1.4mm × 1.0mm); θ_JA = 157°C/W.	Preferred for prototyping or legacy board reuse where DFN assembly is unavailable; unsuitable for <1.0mm board thickness designs.	Select when manual soldering or test fixture compatibility outweighs size/thermal constraints.
TXS0102DCUR	Auto-direction sensing (no DIR pin); lower drive (±8mA); supports 1.2V–3.6V only; higher ICC (20μA typical).	Better for simple push-pull buses (e.g., I²C) but cannot replace DIR-controlled protocols like SDIO or custom GPIO handshaking.	Select only for unidirectional or auto-sensed bidirectional links where DIR control is unnecessary.

Compared with SN74LVC2T45DCTR and TXS0102DCUR, the 74LVC2T45HK3-7 uniquely balances ultra-small footprint, 420Mbps capability, and explicit DIR control-making it optimal for space-constrained, high-speed, and protocol-aware voltage translation in next-gen portable electronics.

Availability

74LVC2T45HK3-7 is available at Aetrix Electronics and suitable for mobile SoC interconnects, automotive infotainment gateways, and industrial PLC I/O expansion requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74LVC2T45HK3-7 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 integrated circuits, specializing in high-performance, energy-efficient components for consumer, computing, industrial, and automotive markets.

The 74LVC2T45 belongs to Diodes' LVC logic family-designed specifically for low-voltage, mixed-rail system interfacing with emphasis on power-down safety, wide V_CC tolerance, and minimal board space.

FAQ

Can 74LVC2T45HK3-7 translate between 1.2V and 5.5V simultaneously?

Yes. V_CC(A) can be set to 1.2V while V_CC(B) is set to 5.5V, enabling direct translation between ultra-low-power sensor domains and legacy 5V peripherals. Input thresholds scale with respective supplies, and outputs meet VOH/VOL specs across the full range per datasheet Table 6.

What happens to outputs when DIR is floating?

DIR has no internal pull-up/down; a floating DIR causes undefined port direction and potential bus contention. Diodes specifies mandatory external biasing-typically a 10kΩ pull-up to V_CC(A) for default A→B mode or pull-down for B→A. Unbiased operation violates Absolute Maximum Ratings.

Does the device support hot-swapping with live V_CC domains?

Yes-its I_OFF feature ensures all pins enter high-impedance when either V_CC is at 0V, preventing back-driving or latch-up during insertion/removal. This is validated per JESD78 Class I latch-up immunity (>100mA) and 4kV HBM ESD robustness.

How does thermal performance compare between X2-DFN1210-8 and X2-DFN1410-8 packages?

X2-DFN1410-8 offers θ_JA = 133°C/W vs. 295°C/W for X2-DFN1210-8 under identical FR-4 test conditions-delivering >2× better heat dissipation. This allows sustained 420Mbps operation at +125°C ambient without derating, critical for enclosed automotive enclosures.

74LVC2T45HK3-7 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

74LVC2T45HK3-7 FAQ

1.How can I place an order for 74LVC2T45HK3-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVC2T45HK3-7 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 74LVC2T45HK3-7 reliable?

The price and inventory of 74LVC2T45HK3-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC2T45HK3-7 is usually 5 days.

3.What payment methods are accepted for 74LVC2T45HK3-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC2T45HK3-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVC2T45HK3-7?

74LVC2T45HK3-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVC2T45HK3-7 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 74LVC2T45HK3-7?

For technical support, including 74LVC2T45HK3-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC2T45HK3-7 requirements.

6.How does Aetrix verify that 74LVC2T45HK3-7 is sourced from the original manufacturer or authorized distributors?

All 74LVC2T45HK3-7 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 74LVC2T45HK3-7 meets industry standards.

7.What is the process for return or replacement of 74LVC2T45HK3-7?

All 74LVC2T45HK3-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC2T45HK3-7, 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 74LVC2T45HK3-7 part is unused and in its original packaging.

Return procedure for 74LVC2T45HK3-7:

1.Submit a request within 90 days.

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

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