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

Texas Instruments SN74LVC4245AIPWREP

Name: SN74LVC4245AIPWREP
Brand: Texas Instruments
SKU: SN74LVC4245AIPWREP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVC4245AIPWREP

Manufacturer:: Texas Instruments

Category:: Translators, Level Shifters

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Datasheet:: SN74LVC4245AIPWREP.pdf

Description:: IC TRANSLATOR BIDIR 24TSSOP

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Product details

Overview

SN74LVC4245AIPWREP from Texas Instruments is an octal bus transceiver and bidirectional 3.3-V to 5-V voltage translator with 3-state outputs, featuring separate VCCA (4.5–5.5 V) and VCCB (2.7–3.6 V) rails, DIR-controlled data direction, OE-enabled bus isolation, and operation across –40°C to 85°C - used in mixed-voltage microcontroller interfacing between 3.3-V peripherals and 5-V legacy buses.

For engineers reviewing the SN74LVC4245AIPWREP datasheet, SN74LVC4245AIPWREP pinout, SN74LVC4245AIPWREP application, or SN74LVC4245AIPWREP equivalent, key selection criteria include bidirectional level-shifting capability, 24-pin TSSOP package compatibility with standard '245 layouts, guaranteed 24-mA drive strength on both ports, and radiation-hardened enhanced-product (EP) qualification for extended-temperature industrial systems.

Technical Context

This device implements asynchronous bidirectional translation using dual-supply CMOS logic: A-port I/Os tolerate up to 6 V and interface with 5-V systems, while B-port I/Os operate natively at 3.3 V with 2.7–3.6-V supply range. Direction control is synchronous with DIR input polarity, and output enable (OE) independently places all outputs in high-impedance state regardless of DIR state.

Propagation delays are asymmetric by port: A→B tPHL/tPLH ≤ 6.7 ns (VCCA = 5 V), B→A tPHL/tPLH ≤ 6.1 ns (VCCB = 3.3 V); enable/disable times (tPZL/tPHZ) range from 5.8 to 9.8 ns. Power dissipation capacitance is 39.5 pF per transceiver when enabled, dropping to 5 pF in 3-state mode.

Key Specifications

Parameter	Value and Actual Design Meaning
VCCA Range	4.5 V to 5.5 V - powers A-port I/Os and supports direct connection to 5-V TTL/CMOS buses without level-shifting circuitry.
VCCB Range	2.7 V to 3.6 V - supplies B-port I/Os and ensures compatibility with 3.3-V LVTTL, LVCMOS, and microcontroller GPIOs.
Drive Strength	±24 mA per I/O - enables robust signal integrity across PCB traces up to 10 cm in length at 25 MHz without external termination.
Propagation Delay	A→B: ≤6.7 ns, B→A: ≤6.1 ns - supports reliable 100-MHz bus handshaking in synchronous peripheral interfaces.
IOZ Leakage	±5 µA max (both ports) - guarantees minimal standby current draw during 3-state isolation, critical for low-power sleep modes.
Operating Temp	–40°C to +85°C - qualified per JEDEC extended-temperature standards including HAST, temperature cycling, and biased 85/85 testing.
ESD Rating	HBM: 2000 V, MM: 200 V, CDM: 1000 V - exceeds industry requirements for handling and board-level reliability in manufacturing environments.

Pinout & Package

TSSOP-24 (PW) package, 7.8 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height, exposed thermal pad not electrically connected; RoHS-compliant NIPDAU lead finish, MSL Level-1 (260°C peak reflow).

Pin/Terminal	Circuit Role	Design Meaning
1	VCCA	5-V supply rail for A-port I/Os and internal logic - must be powered before VCCB to prevent latch-up during power-up sequencing.
2	DIR	Direction control input - high enables A→B data flow; low enables B→A flow; referenced to VCCA logic thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V).
3–10	A1–A8	8-bit A-port bidirectional I/Os - tolerate 0 to VCCA + 0.5 V inputs and drive full-rail outputs compatible with 5-V TTL loads.
11–12	GND	Dual ground pins - reduce ground bounce and improve noise immunity in high-speed switching; must be low-inductance connected.
13–14	VCCB	3.3-V supply rail for B-port I/Os - independent of VCCA, enabling true dual-voltage domain operation without shared regulators.
15	OE	Output-enable control - active-low; when high, all A/B I/Os enter high-Z state, isolating both buses completely.
16–23	B1–B8	8-bit B-port bidirectional I/Os - operate at 3.3-V logic levels with VIH ≥ 2 V (VCCB = 3 V), supporting direct MCU GPIO interfacing.
24	GND	Third ground pin - provides additional return path for B-port currents and improves thermal dissipation under sustained 24-mA loading.

Key Features

Feature	Design Value
Bidirectional Voltage Translation	Enables seamless 3.3-V ↔ 5-V communication without external resistors or discrete translators - reduces BOM count and layout area.
Pinout-Compatible with '245	Pins 2–11 and 14–23 align with industry-standard 20-pin SN74LVC245 pinout - allows drop-in replacement without PCB redesign.
Latch-Up Immunity	Exceeds 250 mA per JESD17 - prevents destructive failure during voltage-rail sequencing errors or hot-plug events in field-deployed systems.
Enhanced Product (EP) Qualification	Controlled baseline, DMS support, and qualification pedigree per JEDEC standards - ensures long-term supply stability and reliability for aerospace/industrial programs.
Low Dynamic Power	39.5-pF power dissipation capacitance enables <10 mW per transceiver at 10 MHz - supports thermally constrained embedded modules.

Applications

Industrial PLC Backplane Interface	Automotive Body Control Module
Use Scenario: Interfacing a 3.3-V ARM Cortex-M7 microcontroller to legacy 5-V CAN transceivers and analog sensor ADCs on a single backplane. IC Role / Device Role / Timing Role: Bidirectional level shifter managing data flow between CPU and mixed-voltage peripherals; DIR toggled per transaction, OE held low during active transfers. Use Value: Eliminates need for eight discrete MOSFET translators or dual-supply buffers, reducing component count by 75% and improving signal timing consistency across all 8 channels.	Use Scenario: Connecting a 3.3-V infotainment SoC to 5-V HVAC actuators, door lock drivers, and dashboard LED controllers in a vehicle ECU. IC Role / Device Role / Timing Role: Isolating and translating control signals between domains; OE asserted during system sleep to cut leakage paths, DIR fixed for unidirectional actuator commands. Use Value: Meets automotive AEC-Q100 stress test requirements via EP qualification and sustains 85°C ambient operation without derating - validated for 15-year vehicle service life.
Medical Imaging Data Acquisition	Test Equipment Digital I/O Subsystem
Use Scenario: Bridging a 3.3-V FPGA-based image processor to 5-V CCD sensor timing generators and analog front-end calibration DACs in ultrasound equipment. IC Role / Device Role / Timing Role: Synchronizing pixel clock and frame strobe signals across voltage domains; propagation delay matching (≤0.6 ns skew) preserves sub-nanosecond timing margins. Use Value: Maintains <100 ps inter-channel skew across all 8 lines - critical for coherent sampling of multi-channel RF echo data without phase distortion.	Use Scenario: Providing programmable digital stimulus and response capture between a 3.3-V PXI controller and 5-V DUTs (e.g., legacy ASICs, power supplies) in automated test systems. IC Role / Device Role / Timing Role: Configurable bus transceiver enabling both stimulus injection (A→B) and response monitoring (B→A); OE controlled per test step to isolate DUT during configuration. Use Value: Supports 100-MHz pattern rates with guaranteed setup/hold margins due to deterministic 6.1–6.7 ns delays - eliminates timing violations in high-speed functional test vectors.

Industrial PLC Backplane Interface

Automotive Body Control Module

Use Scenario: Interfacing a 3.3-V ARM Cortex-M7 microcontroller to legacy 5-V CAN transceivers and analog sensor ADCs on a single backplane.

IC Role / Device Role / Timing Role: Bidirectional level shifter managing data flow between CPU and mixed-voltage peripherals; DIR toggled per transaction, OE held low during active transfers.

Use Value: Eliminates need for eight discrete MOSFET translators or dual-supply buffers, reducing component count by 75% and improving signal timing consistency across all 8 channels.

Use Scenario: Connecting a 3.3-V infotainment SoC to 5-V HVAC actuators, door lock drivers, and dashboard LED controllers in a vehicle ECU.

IC Role / Device Role / Timing Role: Isolating and translating control signals between domains; OE asserted during system sleep to cut leakage paths, DIR fixed for unidirectional actuator commands.

Use Value: Meets automotive AEC-Q100 stress test requirements via EP qualification and sustains 85°C ambient operation without derating - validated for 15-year vehicle service life.

Medical Imaging Data Acquisition

Test Equipment Digital I/O Subsystem

Use Scenario: Bridging a 3.3-V FPGA-based image processor to 5-V CCD sensor timing generators and analog front-end calibration DACs in ultrasound equipment.

IC Role / Device Role / Timing Role: Synchronizing pixel clock and frame strobe signals across voltage domains; propagation delay matching (≤0.6 ns skew) preserves sub-nanosecond timing margins.

Use Value: Maintains <100 ps inter-channel skew across all 8 lines - critical for coherent sampling of multi-channel RF echo data without phase distortion.

Use Scenario: Providing programmable digital stimulus and response capture between a 3.3-V PXI controller and 5-V DUTs (e.g., legacy ASICs, power supplies) in automated test systems.

IC Role / Device Role / Timing Role: Configurable bus transceiver enabling both stimulus injection (A→B) and response monitoring (B→A); OE controlled per test step to isolate DUT during configuration.

Use Value: Supports 100-MHz pattern rates with guaranteed setup/hold margins due to deterministic 6.1–6.7 ns delays - eliminates timing violations in high-speed functional test vectors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional level-shifting applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AVC4T245RTER	Single-supply (1.2–3.6 V), lower drive (±12 mA), 14-pin VQFN - no VCCA/VCCB separation; requires external level-shifting for 5-V interfaces.	Suitable only for 3.3-V ↔ 1.8-V or 2.5-V translation; cannot directly replace SN74LVC4245AIPWREP in 5-V systems.	Select only when interfacing sub-3.6-V domains and board space is constrained; requires redesign for 5-V compatibility.
TXB0108PWR	Auto-direction sensing, 1.2–3.6-V I/O, 20-pin TSSOP - no DIR pin; relies on bus activity to detect direction; max 32-mA drive but no 5-V tolerance.	Eliminates DIR control wiring but introduces latency uncertainty; unsuitable where deterministic direction control or 5-V bus driving is required.	Prefer for simple 3.3-V ↔ 1.8-V GPIO expansion; avoid where precise timing, 5-V signaling, or DIR-synchronized protocols (e.g., SPI, parallel bus) are used.

Compared with SN74LVC4245AIPWREP, SN74AVC4T245RTER lacks 5-V tolerance and requires external circuitry for legacy interface support, while TXB0108PWR sacrifices deterministic direction control and 5-V drive capability - making SN74LVC4245AIPWREP the only option meeting simultaneous requirements for dual-rail independence, 5-V bus compatibility, and precise DIR/OE timing in industrial and automotive designs.

Availability

SN74LVC4245AIPWREP is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, medical imaging subsystems, and test equipment digital I/O requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC4245AIPWREP 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in industrial, automotive, and communications markets.

The SN74LVC4245AIPWREP belongs to TI's enhanced-product (EP) logic family, designed specifically for high-reliability applications demanding extended temperature operation, controlled manufacturing baselines, and long-term supply assurance in mission-critical systems.

FAQ

What is the maximum allowable voltage on the A-port I/O pins of SN74LVC4245AIPWREP?

The A-port I/O pins (A1–A8) tolerate input voltages up to VCCA + 0.5 V, with absolute maximum rating of 6.5 V. When VCCA = 5.5 V, this permits safe operation with 6-V-tolerant inputs - essential for interfacing with 5-V TTL outputs without clamping diodes or external protection. This specification is confirmed in the Absolute Maximum Ratings table on page 2 of the SCAS742 datasheet.

Does SN74LVC4245AIPWREP support hot-swap or live-insertion between powered voltage domains?

SN74LVC4245AIPWREP does not support arbitrary hot-swap between powered domains. Its recommended power-up sequence requires grounding first, then VCCA, then VCCB - with OE tied to VCCA via pullup - to prevent bus contention or excessive supply current. Violating this sequence risks latch-up, as confirmed by TI's Power-up Considerations section (page 5) and JESD17 latch-up rating of >250 mA.

Can SN74LVC4245AIPWREP be used for unidirectional level shifting only?

Yes, SN74LVC4245AIPWREP can operate unidirectionally by holding DIR constant (high for A→B, low for B→A) while using OE to enable/disable the path. This is explicitly supported in the FUNCTION TABLE (page 2) and commonly applied in systems like FPGA-to-ADC interfaces where data flows one way but voltage domains differ - retaining full 24-mA drive and timing specs.

What is the thermal resistance (θJA) of SN74LVC4245AIPWREP in its TSSOP-24 package?

The junction-to-ambient thermal resistance (θJA) for SN74LVC4245AIPWREP in the PW package is 88°C/W, as specified in the Absolute Maximum Ratings tables for both VCCA and VCCB supply conditions (pages 2–3). This value assumes standard JEDEC 2-layer board conditions and is critical for calculating maximum power dissipation at 85°C ambient - e.g., limiting continuous 24-mA switching to <10% duty cycle in worst-case layout.

Is SN74LVC4245AIPWREP pin-compatible with standard SN74LVC245 devices?

SN74LVC4245AIPWREP uses pins 2–11 and 14–23 to match the signal pinout of conventional 20-pin '245 transceivers (e.g., SN74LVC245), enabling mechanical and routing compatibility. However, it adds VCCA, VCCB, and extra GND pins in the 24-pin TSSOP footprint - requiring minor PCB adaptation but no netlist or logic redesign when upgrading from single-supply '245s to dual-rail translation.

SN74LVC4245AIPWREP Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

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:: 8

Voltage - VCCA:: 4.5 V ~ 5.5 V

Voltage - VCCB:: 2.7 V ~ 3.6 V

Input Signal:: -

Output Signal:: -

Output Type:: Tri-State

Data Rate:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Features:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-TSSOP (0.173", 4.40mm Width)

SN74LVC4245AIPWREP FAQ

1.How can I place an order for SN74LVC4245AIPWREP through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVC4245AIPWREP 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 SN74LVC4245AIPWREP reliable?

The price and inventory of SN74LVC4245AIPWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC4245AIPWREP is usually 5 days.

3.What payment methods are accepted for SN74LVC4245AIPWREP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC4245AIPWREP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVC4245AIPWREP?

SN74LVC4245AIPWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVC4245AIPWREP 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 SN74LVC4245AIPWREP?

For technical support, including SN74LVC4245AIPWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC4245AIPWREP requirements.

6.How does Aetrix verify that SN74LVC4245AIPWREP is sourced from the original manufacturer or authorized distributors?

All SN74LVC4245AIPWREP 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 SN74LVC4245AIPWREP meets industry standards.

7.What is the process for return or replacement of SN74LVC4245AIPWREP?

All SN74LVC4245AIPWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC4245AIPWREP, 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 SN74LVC4245AIPWREP part is unused and in its original packaging.

Return procedure for SN74LVC4245AIPWREP:

1.Submit a request within 90 days.

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

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