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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74LVTH245ADW

Name: SN74LVTH245ADW
Brand: Texas Instruments
SKU: SN74LVTH245ADW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVTH245ADW

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: SN74LVTH245ADW.pdf

Description:: IC TXRX NON-INVERT 3.6V 20SOIC

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Product details

Overview

SN74LVTH245ADW from Texas Instruments is a 3.3-V ABT octal bus transceiver with 3-state outputs, designed for bidirectional asynchronous data transfer between 3.3-V and 5-V systems. It supports mixed-mode signal operation (5-V inputs/outputs with 3.3-V V_CC), delivers ±64 mA output drive at V_CC = 3.3 V, and features bus-hold circuitry eliminating external pull resistors. Used in industrial backplane interfaces and legacy-to-modern voltage domain bridging.

For engineers reviewing the SN74LVTH245ADW datasheet, SN74LVTH245ADW pinout, SN74LVTH245ADW application, or SN74LVTH245ADW equivalent, key selection criteria include its 20-pin SOIC-DW package, I_off support for hot insertion, 2.7–3.6 V operating range, and guaranteed 3.5 ns max propagation delay (t_PLH/t_PHL) under 50-pF load.

Technical Context

This device implements an active-high direction-control (DIR) and active-low output-enable (OE) logic architecture to route data bidirectionally between A and B buses. Its ABT (Advanced BiCMOS Technology) core enables TTL-compatible input thresholds while maintaining 3.3-V supply efficiency and low ground bounce (V_OLP < 0.8 V).

The integrated bus-hold circuitry maintains valid logic states on floating A/B inputs without external components, and I_off protection prevents current backflow during power-down-critical for live-insertion systems. Power-up 3-state ensures high-impedance outputs during supply ramp-up.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - supports unregulated battery operation down to 2.7 V without functional degradation
I_OL / I_OH	64 mA / −32 mA at V_CC = 3.3 V - drives standard TTL loads directly without buffers
t_PLH/t_PHL	2.3 ns typical (max 4 ns) at V_CC = 3.3 V, CL = 50 pF - enables >100 MHz bus timing margins
Bus-Hold Current	±750 μA at V_CC = 3.6 V - actively sustains logic state on unused inputs, removing need for pull resistors
I_off	±100 μA at V_CC = 0 V - blocks damaging back-current during hot-swap or partial power-down
ESD Rating	2000-V HBM, 200-V MM - exceeds JEDEC JESD22-A114/A115 for robust board-level handling
θ_JA	58°C/W (SOIC-DW) - enables thermal design up to 85°C ambient with moderate PCB copper

Pinout & Package

SN74LVTH245ADW uses a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm body, 2.65 mm max height, 0.65 mm lead pitch, RoHS-compliant NiPdAu finish, and MSL Level-1 rating.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	A1–A8 Inputs/Outputs	One side of bidirectional data bus; connected to local 3.3-V subsystem
11, 12, 13, 14, 15, 16, 17, 18	B1–B8 Inputs/Outputs	Opposite side of bidirectional data bus; interfaces to 5-V legacy bus
9	DIR	Direction control: HIGH routes A→B, LOW routes B→A; TTL-compatible threshold
10	OE	Output enable: LOW enables transceiver, HIGH forces all A/B pins to high-impedance
20	V_CC	3.3-V supply input; must be decoupled locally per TI layout guidelines
19	GND	Signal ground reference; separate from power ground in noise-sensitive designs

Key Features

Feature	Design Value
Mixed-voltage interface	5-V tolerant inputs/outputs with 3.3-V V_CC - eliminates level-shifter ICs in 3.3/5-V coexistence systems
Hot-insertion support	I_off + power-up 3-state - prevents bus contention and backfeed during live card replacement
Bus-hold circuitry	Active hold on all A/B inputs - removes external pullup/pulldown resistors and associated BOM cost
Low ground bounce	V_OLP < 0.8 V at 3.3 V - reduces switching noise coupling into analog sections or adjacent signals
Latch-up immunity	>500 mA per JESD17 - withstands transient overvoltage events without destructive latch-up

Applications

Industrial Backplane Interface	Legacy System Voltage Translation
Use Scenario: Connecting a modern 3.3-V FPGA-based controller to a legacy 5-V ISA or VME backplane. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver enabling synchronous data exchange across voltage domains. Use Value: Eliminates discrete level-shifters and reduces PCB area by 40% versus dual-rail solutions while maintaining full 8-bit throughput.	Use Scenario: Upgrading a 5-V microcontroller subsystem with a new 3.3-V ADC/DAC without redesigning the main bus. IC Role / Device Role / Timing Role: Asynchronous bus bridge isolating timing domains and translating logic levels on-the-fly. Use Value: Enables drop-in replacement of legacy peripherals using existing 5-V bus infrastructure and timing constraints.
Hot-Swappable Module Interface	Test Equipment Signal Conditioning
Use Scenario: Modular instrumentation chassis where cards are inserted/removed while powered. IC Role / Device Role / Timing Role: Isolation gate with I_off and power-up 3-state ensuring zero bus conflict during insertion. Use Value: Prevents system lockup or damage during field maintenance, meeting IEC 61000-4-2 Class 3 ESD robustness.	Use Scenario: Signal routing matrix in automated test equipment requiring clean, isolated digital paths. IC Role / Device Role / Timing Role: Controlled-direction buffer with bus-hold preventing floating inputs during reconfiguration. Use Value: Reduces false triggering and setup-time errors by holding last valid state on unused channels.

Industrial Backplane Interface

Legacy System Voltage Translation

Use Scenario: Connecting a modern 3.3-V FPGA-based controller to a legacy 5-V ISA or VME backplane.

IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver enabling synchronous data exchange across voltage domains.

Use Value: Eliminates discrete level-shifters and reduces PCB area by 40% versus dual-rail solutions while maintaining full 8-bit throughput.

Use Scenario: Upgrading a 5-V microcontroller subsystem with a new 3.3-V ADC/DAC without redesigning the main bus.

IC Role / Device Role / Timing Role: Asynchronous bus bridge isolating timing domains and translating logic levels on-the-fly.

Use Value: Enables drop-in replacement of legacy peripherals using existing 5-V bus infrastructure and timing constraints.

Hot-Swappable Module Interface

Test Equipment Signal Conditioning

Use Scenario: Modular instrumentation chassis where cards are inserted/removed while powered.

IC Role / Device Role / Timing Role: Isolation gate with I_off and power-up 3-state ensuring zero bus conflict during insertion.

Use Value: Prevents system lockup or damage during field maintenance, meeting IEC 61000-4-2 Class 3 ESD robustness.

Use Scenario: Signal routing matrix in automated test equipment requiring clean, isolated digital paths.

IC Role / Device Role / Timing Role: Controlled-direction buffer with bus-hold preventing floating inputs during reconfiguration.

Use Value: Reduces false triggering and setup-time errors by holding last valid state on unused channels.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC245A	Lower drive (24 mA), no bus-hold, no I_off, 1.65–3.6 V V_CC	Suitable only for fully 3.3-V systems without hot-swap or floating-input concerns	Select when cost sensitivity outweighs mixed-voltage or robustness requirements
SN74AVC245	Higher speed (1.8 ns typ), 1.2–3.6 V V_CC, no bus-hold, no I_off	Optimized for high-speed low-voltage FPGAs, not 5-V interfacing	Choose for sub-1.8-V logic families or <1.5 ns timing-critical links

Compared with SN74LVC245A and SN74AVC245, SN74LVTH245ADW uniquely combines 5-V tolerance, bus-hold, I_off, and 64-mA drive in a single SOIC package-making it irreplaceable in mixed-domain industrial backplanes requiring reliability and compatibility.

Availability

SN74LVTH245ADW is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded computing applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for SN74LVTH245ADW 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The SN74LVTH245A product line targets robust voltage-domain bridging in mission-critical industrial and instrumentation systems, emphasizing mixed-signal interoperability, hot-swap resilience, and legacy system integration.

FAQ

What is the maximum operating temperature range for SN74LVTH245ADW?

The SN74LVTH245ADW is rated for operation from −40°C to +85°C ambient temperature. This industrial-grade range is validated per TI's recommended operating conditions and supported by thermal characterization (θ_JA = 58°C/W). Derating is required above 70°C if power dissipation exceeds 350 mW in still-air environments.

Does SN74LVTH245ADW require external pull-up resistors on its A/B bus lines?

No. SN74LVTH245ADW integrates active bus-hold circuitry on all A and B port inputs, which maintains valid logic states on floating or unused lines. TI explicitly advises against adding external pull-up or pull-down resistors when bus-hold is enabled, as they may interfere with hold current and increase power consumption.

Can SN74LVTH245ADW safely interface a 3.3-V microcontroller with a 5-V EEPROM?

Yes. SN74LVTH245ADW supports 5-V input and output voltage levels while operating from a 3.3-V V_CC, making it suitable for bidirectional communication with 5-V EEPROMs. Its 5-V-tolerant I/Os and ±64 mA drive ensure reliable signal integrity without additional level-shifting components.

What is the purpose of the DIR and OE pins on SN74LVTH245ADW?

The DIR (direction) pin controls data flow direction: HIGH enables A→B transmission, LOW enables B→A. The OE (output enable) pin controls output state: LOW activates the transceiver, HIGH places all A/B pins in high-impedance isolation. Both are TTL-compatible and support direct connection to microcontroller GPIOs.

Is SN74LVTH245ADW pin-compatible with other packages in the SN74LVTH245A family?

Yes-SN74LVTH245ADW shares identical pinout and function mapping with all 20-pin variants including SN74LVTH245ADBR (SSOP), SN74LVTH245APWR (TSSOP), and SN74LVTH245ARGYR (VQFN). Pin numbering, terminal roles, and electrical behavior are consistent across these packages, enabling footprint interchangeability in layout design.

SN74LVTH245ADW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVTH

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Active

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

SN74LVTH245ADW FAQ

1.How can I place an order for SN74LVTH245ADW through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVTH245ADW 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 SN74LVTH245ADW reliable?

The price and inventory of SN74LVTH245ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH245ADW is usually 5 days.

3.What payment methods are accepted for SN74LVTH245ADW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH245ADW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVTH245ADW?

SN74LVTH245ADW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVTH245ADW 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 SN74LVTH245ADW?

For technical support, including SN74LVTH245ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH245ADW requirements.

6.How does Aetrix verify that SN74LVTH245ADW is sourced from the original manufacturer or authorized distributors?

All SN74LVTH245ADW 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 SN74LVTH245ADW meets industry standards.

7.What is the process for return or replacement of SN74LVTH245ADW?

All SN74LVTH245ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH245ADW, 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 SN74LVTH245ADW part is unused and in its original packaging.

Return procedure for SN74LVTH245ADW:

1.Submit a request within 90 days.

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

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