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

Diodes Incorporated 74LVC1T45FX4-7

Name: 74LVC1T45FX4-7
Brand: Diodes Incorporated
SKU: 74LVC1T45FX4-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVC1T45FX4-7

Manufacturer:: Diodes Incorporated

Category:: Translators, Level Shifters

Package:

Datasheet:: 74LVC1T45FX4-7.pdf

Description:: IC TRNSLTR BIDIR X2DFN1409-6

Quantity:: RFQ Add To RFQ list

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Inventory:5,000

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Product details

Overview

74LVC1T45FX4-7 from Diodes Incorporated is a single-bit dual-supply translating transceiver in X2-DFN1409-6 package, enabling bidirectional voltage-level translation between 1.65V–5.5V domains. It features tri-state outputs, I_OFF protection, ±24mA drive at 3.3V, and 16µA max ICC, used for isolating signal paths during partial power-down in mobile SoC interconnects.

For engineers reviewing the 74LVC1T45FX4-7 datasheet, 74LVC1T45FX4-7 pinout, 74LVC1T45FX4-7 application, or 74LVC1T45FX4-7 equivalent, this page delivers verified electrical specs, directional control behavior, I_OFF isolation capability, thermal resistance (ϴ_JA = 450°C/W), and real-world use cases in battery-powered multi-rail systems.

Technical Context

The device implements a direction-controlled bidirectional data path where DIR referenced to V_CCA selects A→B (DIR = HIGH) or B→A (DIR = LOW). Both A and B pins are 5.5V-tolerant inputs and support rail-to-rail output swing relative to their respective supplies.

I_OFF functionality activates when either V_CCA or V_CCB = 0V, forcing outputs into high-impedance state with leakage ≤±2µA up to 5.5V, preventing backflow currents and enabling true power-domain isolation without external circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CCA/V_CCB Range	1.65V to 5.5V each - enables universal translation across legacy and modern logic families (1.8V/2.5V/3.3V/5V).
Output Drive	±24mA at 3V - sufficient to drive standard CMOS loads and moderate capacitive bus lines without buffering.
I_OFF Leakage	≤±2µA at 0V supply - ensures robust isolation during system sleep modes and prevents cross-domain current injection.
Propagation Delay	0.5ns–17.7ns (V_CCA=5V, V_CCB=1.8V) - supports high-speed interface bridging up to ~100MHz data rates.
ESD Protection	2kV HBM, 1kV CDM, 200V MM - meets industrial-grade robustness requirements for handheld and portable electronics.
Supply Current	≤4µA total (I_CCA + I_CCB) - minimizes quiescent power in always-on signal monitoring paths.
Input Tolerance	Up to 5.5V on all pins - allows safe interfacing with higher-voltage peripherals while powered from lower rails.

Pinout & Package

X2-DFN1409-6 is a 1.4mm × 0.9mm, 0.4mm pitch, 6-terminal leadless package with wettable flanks, optimized for space-constrained PCB layouts and automated optical inspection.

Pin/Terminal	Circuit Role	Design Meaning
1 - V_CCA	Supply for A-side I/O and DIR reference	Defines logic thresholds for DIR and A pin; must be stable before asserting DIR.
2 - GND	Digital ground reference	Common return path for both domains; requires low-inductance connection to minimize noise coupling.
3 - A	Bidirectional data terminal (A domain)	Connects to 1.65V–5.5V logic; tolerates up to 5.5V regardless of V_CCA state.
4 - B	Bidirectional data terminal (B domain)	Connects to independent 1.65V–5.5V logic; electrically isolated from A when in 3-state.
5 - DIR	Direction control input (V_CCA-referenced)	HIGH → A input/B output; LOW → B input/A output; no internal pull-up/down.
6 - V_CCB	Supply for B-side I/O	Independent of V_CCA; enables asymmetric voltage translation (e.g., 1.8V ↔ 3.3V).

Key Features

Feature	Design Value
Universal dual-supply translation	Supports any combination of 1.65V–5.5V rails on A and B sides - eliminates need for multiple discrete translators.
I_OFF partial-power-down mode	Outputs enter high-Z when either V_CCA or V_CCB = 0V - enables safe hot-plug and domain shutdown without signal contention.
5.5V-tolerant inputs	All pins accept 0–5.5V regardless of supply state - simplifies interface to mixed-voltage peripherals like USB PHYs or PMICs.
Low dynamic power	Typical C_pd = 3–21pF depending on direction and rail - reduces switching power in high-frequency data links.
High noise immunity	100mV typical hysteresis on inputs - suppresses false triggering from EMI or crosstalk in dense mobile PCBs.

Applications

Mobile SoC Interconnect

USB Type-C CC Line Translation

Use Scenario: Bridging GPIOs between an application processor (1.8V I/O) and a modem baseband IC (2.8V I/O) in smartphones.

IC Role / Device Role / Timing Role: Bidirectional level translator with direction control synchronized to data flow; no clock required.

Use Value: Eliminates need for two unidirectional translators and associated control logic, reducing BOM count and board area by 40%.

Use Scenario: Translating Configuration Channel (CC) line signals between USB PD controller (3.3V) and legacy 5V accessory detection circuitry.

IC Role / Device Role / Timing Role: Voltage translator with I_OFF isolation - maintains CC line integrity during V_CONN power sequencing.

Use Value: Prevents backfeed from 5V accessory into 3.3V PD controller during plug insertion, avoiding latch-up risk.

Industrial Sensor Hub Interface

Wearable Battery Management Signal Isolation

Use Scenario: Connecting a 5V analog sensor front-end to a 1.8V microcontroller ADC input via digital control lines (e.g., enable, reset).

IC Role / Device Role / Timing Role: Level-shifting control signal path with guaranteed 3-state during MCU reset assertion.

Use Value: Ensures sensor remains disabled until MCU firmware fully initializes, preventing spurious readings or calibration errors.

Use Scenario: Isolating fuel gauge I²C lines between a 3.3V host MCU and 2.5V battery monitor IC during deep-sleep mode.

IC Role / Device Role / Timing Role: Directional translator with automatic I_OFF activation when battery monitor powers down.

Use Value: Removes parasitic loading on I²C bus during sleep, extending battery life by eliminating standby current leakage.

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
SN74LVC1T45DCKR	SOT363 package (2.15mm × 2.1mm); ϴ_JA = 371°C/W; same electrical specs.	Larger footprint and higher thermal resistance - less suitable for ultra-thin wearables but easier for hand-soldering.	Select when manual rework or thermal margin >100°C is required; avoid in <1mm height constraints.
NC7SZ45P6X	ON Semiconductor part in SOT-363; identical function but 100mV lower hysteresis and no I_OFF spec above 3.6V.	Not rated for 5.5V-tolerant operation or full I_OFF isolation at 5V - limits use in mixed 5V/3.3V systems.	Acceptable only in 1.8V/2.5V/3.3V-only designs; verify I_OFF leakage at target V_CC before deployment.

Compared with SN74LVC1T45DCKR and NC7SZ45P6X, the 74LVC1T45FX4-7 offers superior thermal performance in compact form factor and guaranteed 5.5V I_OFF isolation - critical for USB-C and battery-isolated architectures where rail sequencing is non-deterministic.

Availability

74LVC1T45FX4-7 is available at Aetrix Electronics and suitable for mobile device interconnects, USB-C peripheral interfaces, and battery-powered sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC1T45FX4-7 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 consumer, industrial, and automotive markets.

The 74LVC logic family targets space- and power-constrained applications requiring robust voltage translation, with the 74LVC1T45 specifically engineered for single-bit bidirectional bridging in multi-rail portable electronics.

FAQ

Can 74LVC1T45FX4-7 translate between 1.2V and 3.3V domains?

No. The absolute minimum V_CCA and V_CCB are 1.65V per datasheet DS35804 Rev. 4-2. Operation below 1.65V violates recommended conditions and risks undefined logic thresholds, increased propagation delay, and potential failure to meet VOL/VOH specs. For 1.2V interfaces, consider dedicated ultra-low-voltage translators like TXS0102.

What happens if DIR is left floating?

DIR has no internal pull-up or pull-down. A floating DIR results in indeterminate direction control, causing simultaneous A→B and B→A paths to activate unpredictably - leading to bus contention, excessive current draw, and potential damage. Always tie DIR to V_CCA or GND via a resistor (e.g., 10kΩ) in production designs.

Does the X2-DFN1409-6 package support reflow soldering per JEDEC J-STD-020?

Yes. The X2-DFN1409-6 package is qualified for standard Pb-free reflow profiles (peak 260°C, 20–40 sec above 217°C) per JEDEC J-STD-020E. Diodes' package outline document confirms MSL 1 rating with unlimited floor life when sealed per J-STD-033.

Is there a timing penalty when translating from 5V to 1.8V versus 1.8V to 5V?

Yes. Propagation delay is asymmetric: tpLH(A→B) at V_CCA=5V/V_CCB=1.8V is 0.5ns min / 3.9ns max, while tpLH(B→A) under same conditions is 0.5ns min / 3.9ns max - identical per datasheet Table 7. However, output rise/fall times differ due to drive strength mismatch, requiring careful signal integrity analysis for timing-critical paths.

74LVC1T45FX4-7 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-XFDFN

74LVC1T45FX4-7 FAQ

1.How can I place an order for 74LVC1T45FX4-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVC1T45FX4-7 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 74LVC1T45FX4-7 reliable?

The price and inventory of 74LVC1T45FX4-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1T45FX4-7 is usually 5 days.

3.What payment methods are accepted for 74LVC1T45FX4-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1T45FX4-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVC1T45FX4-7?

74LVC1T45FX4-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVC1T45FX4-7 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 74LVC1T45FX4-7?

For technical support, including 74LVC1T45FX4-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1T45FX4-7 requirements.

6.How does Aetrix verify that 74LVC1T45FX4-7 is sourced from the original manufacturer or authorized distributors?

All 74LVC1T45FX4-7 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 74LVC1T45FX4-7 meets industry standards.

7.What is the process for return or replacement of 74LVC1T45FX4-7?

All 74LVC1T45FX4-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1T45FX4-7, 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 74LVC1T45FX4-7 part is unused and in its original packaging.

Return procedure for 74LVC1T45FX4-7:

1.Submit a request within 90 days.

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

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