My Inquiry
My Account
Texas Instruments SN74LVT245DW
- Part No.:
- SN74LVT245DW
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74LVT245DW.pdf
- Description:
- BUS TRANSCEIVER
- Quantity:
- Payment:
- Shipping:
Inventory:859
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVT245DW from Texas Instruments is a 3.3-V ABT octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 3.3-V and 5-V logic domains. It features direction control (DIR), output enable (OE), hot-insertion support via Ioff and power-up 3-state, and operates across −40°C to 85°C with VCC from 2.7 V to 3.6 V. Used in mixed-voltage backplane interfaces and FPGA-to-ASIC interconnects.
For engineers reviewing the SN74LVT245DW datasheet, SN74LVT245DW pinout, SN74LVT245DW application, or SN74LVT245DW equivalent, key selection criteria include its 2.7–3.6 V supply range, 3.5 ns max propagation delay at 3.3 V, ±100 μA Ioff, 64 mA IOL drive strength, and SOIC-20 (DW) package compatibility with legacy 5-V systems.
Technical Context
This device implements an advanced BiCMOS ABT (Advanced Bus Transceiver) architecture enabling TTL-level input compatibility (VIH = 2 V, VIL = 0.8 V) while operating from a 3.3-V supply. Its dual-rail tolerance allows 5-V signals on A/B ports without level shifters, supported by input clamp diodes rated to ±50 mA and absolute max VI of 7 V.
The transceiver uses separate DIR and OE controls: DIR selects data flow direction (A→B or B→A), while OE places all outputs in high-impedance state. Power-up 3-state and Ioff circuitry ensure bus isolation during power sequencing-critical for hot-swap backplanes and modular computing systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery operation down to 2.7 V without functional degradation. |
| Propagation Delay (tPLH/tPHL) | Max 3.5 ns at VCC = 3.3 V - enables >100 MHz bus operation in synchronous systems. |
| IOL / IOH | 64 mA / −32 mA - drives standard TTL loads and sustains signal integrity over 15-cm PCB traces. |
| Ioff | ±100 μA at VCC = 0 - prevents damaging backflow current during hot insertion or partial power-down. |
| VOL / VOH | 0.55 V @ 64 mA / 2.0 V @ −32 mA - ensures noise margins >0.7 V in 3.3-V LVTTL environments. |
| Input Clamp Voltage (VIK) | −1.2 V - protects inputs against negative transients up to −1.2 V under −18 mA sink. |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements per JESD22. |
Pinout & Package
SN74LVT245DW is housed in a 20-pin SOIC (DW) package measuring 12.8 mm × 7.5 mm × 2.35 mm, with standard 1.27-mm pitch and RoHS-compliant CU-NiPdAu lead finish (Level-1 MSL).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Low = B→A data flow; High = A→B data flow; TTL-compatible threshold (VIL = 0.8 V, VIH = 2 V). |
| 2–9 (A1–A8) | Port A Data Inputs/Outputs | Bidirectional I/O pins connected to local 3.3-V or 5-V bus; tolerate 5.5-V inputs with clamping. |
| 10 (GND) | Ground Reference | Primary return path for all I/O and supply currents; requires low-inductance connection to minimize ground bounce. |
| 11 (VCC) | Supply Voltage | 3.3-V nominal supply; accepts 2.7–3.6 V; decoupling capacitor (0.1 μF) required within 5 mm. |
| 12 (OE) | Output Enable Input | Active-low; ties to VCC via pullup resistor (≥10 kΩ) to ensure high-Z during power-up/power-down. |
| 13–20 (B1–B8) | Port B Data Inputs/Outputs | Bidirectional I/O pins for remote 3.3-V or 5-V bus; electrically identical to A-side with same VI/VO ratings. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant inputs/outputs with 3.3-V VCC enables direct interfacing between legacy 5-V peripherals and modern 3.3-V controllers. |
| Hot-insertion support | Ioff and power-up 3-state eliminate bus contention and backfeed current during live card replacement in telecom and server backplanes. |
| Low ground bounce (VOLP) | <0.8 V at VCC = 3.3 V - reduces simultaneous switching noise in dense memory or data-path applications. |
| Latch-up immunity | >100 mA per JESD78 Class II - prevents destructive latch-up during ESD events or voltage transients. |
| Wide temperature range | −40°C to +85°C operation - qualified for industrial and extended commercial environments without derating. |
Applications
| Industrial Backplane Interface | FPGA-to-Microcontroller Bridge |
|---|---|
Use Scenario: Connecting a 5-V industrial PLC I/O module to a 3.3-V FPGA-based controller board via parallel bus. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver managing A→B and B→A data flow under DIR control, with OE synchronized to FPGA reset sequence. Use Value: Eliminates discrete level shifters; maintains 3.5 ns timing budget for 100-MHz bus cycles while supporting hot-swap maintenance. |
Use Scenario: Interfacing a 3.3-V ARM microcontroller's GPIO port to a 5-V sensor array requiring TTL-compatible strobes and data lines. IC Role / Device Role / Timing Role: Isolates MCU I/O from higher-voltage sensors; DIR set statically for unidirectional reads, OE used for burst-mode sampling control. Use Value: Provides 64 mA drive per line to meet sensor setup/hold timing; Ioff prevents sensor leakage current from disrupting MCU power rail during sleep. |
| Modular Test Equipment Bus | Legacy Memory Expansion Interface |
Use Scenario: Hot-pluggable instrument modules sharing a common 5-V data bus while powered from independent 3.3-V supplies. IC Role / Device Role / Timing Role: Bus isolator ensuring no backfeed between modules; OE asserted during insertion/removal to enforce high-Z state. Use Value: Ioff ≤ ±100 μA guarantees zero current injection into powered modules during insertion, preventing system resets or data corruption. |
Use Scenario: Expanding a 3.3-V SoC's address/data bus to interface with legacy 5-V SRAM or EPROM devices. IC Role / Device Role / Timing Role: Direction-controlled transceiver driving SRAM address lines (A→B) and reading data (B→A) under CPU control. Use Value: VOL ≤ 0.55 V at 64 mA ensures valid logic-low recognition by 5-V memory chips; tPLH/tPHL ≤ 3.5 ns preserves memory access timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH245PW | Lower drive (24 mA IOL), wider VCC range (2.7–5.5 V), no 5-V-tolerant inputs - requires external level translation for 5-V buses. | Suitable only for pure 3.3-V systems; not interoperable with 5-V peripherals without added components. | Select when cost or power efficiency outweighs mixed-voltage capability and full 5-V bus compatibility is unnecessary. |
| 74ALVC16245DGGR | 16-bit (dual-octal), 3.3-V only, 24 mA IOL, no Ioff - lacks hot-insertion protection and 5-V input tolerance. | Requires redesign for 16-bit width; unsuitable for hot-swap or mixed-voltage use cases due to missing Ioff and VI max = 3.6 V. | Choose only for space-constrained 16-bit applications where thermal performance (θJA = 65°C/W) and lower ICC (0.1 mA) are prioritized over robustness. |
Compared with SN74LVT245DW, SN74LVTH245PW trades 5-V input tolerance and 64 mA drive for lower static current and broader supply flexibility, while 74ALVC16245DGGR offers double width but sacrifices hot-swap safety and mixed-voltage operation-making SN74LVT245DW uniquely suited for industrial backplane and FPGA-peripheral bridging.
Availability
SN74LVT245DW is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA-to-peripheral bridges, modular test equipment buses, and legacy memory expansion requiring stable component supply and long-term manufacturability.
Supply support for SN74LVT245DW 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 logic solutions, with over 50 years of innovation in interface and bus technology.
The SN74LVT245DW belongs to TI's ABT logic family, engineered specifically for high-speed, mixed-voltage bidirectional bus communication in industrial, telecom, and computing infrastructure where reliability under hot-swap and wide supply conditions is critical.
FAQ
What is the maximum operating temperature for SN74LVT245DW?
The SN74LVT245DW is specified for operation from −40°C to +85°C ambient temperature. This range is validated per JEDEC JESD78 latch-up testing and JESD22 ESD stress protocols, making it suitable for industrial environments without thermal derating. The DW package's θJA of 58°C/W ensures safe junction temperatures under typical 50-mW power dissipation.
Does SN74LVT245DW support hot insertion?
Yes, SN74LVT245DW supports hot insertion via two integrated features: Ioff circuitry limits current to ±100 μA when VCC = 0, preventing backflow into powered systems; and power-up 3-state forces outputs into high-impedance during power ramp-up. These are verified per TI's production test flow and documented in SCES004H Section 6.2.
Can SN74LVT245DW interface directly with 5-V logic?
Yes, SN74LVT245DW accepts 5-V inputs on both A and B ports while operating from a 3.3-V supply. Its absolute max input voltage is 7 V, and it includes internal clamp diodes rated to −50 mA. This eliminates external level shifters in mixed-voltage systems, as confirmed in the "Mixed-Mode Signal Operation" feature description on page 1 of SCES004H.
What is the recommended pullup resistor value for OE on SN74LVT245DW?
Texas Instruments recommends tying OE to VCC through a pullup resistor ≥10 kΩ to ensure high-impedance state during power-up. This value balances current consumption (<0.33 mA at 3.3 V) against noise immunity and rise time, based on the driver's current-sinking capability specified in Section 6.3 of SCES004H.
Is SN74LVT245DW pin-compatible with other 74-series transceivers?
SN74LVT245DW shares the same 20-pin SOIC (DW) footprint and pinout as SN74LVC245A and SN74LVTH245, but differs electrically: only SN74LVT245DW provides 5-V-tolerant inputs and 64 mA IOL. Pin compatibility does not imply functional interchangeability-substituting without verifying VI/VO ratings and drive strength may cause timing or reliability issues.
SN74LVT245DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LVT245DW FAQ
1.How can I place an order for SN74LVT245DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT245DW 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 SN74LVT245DW reliable?
The price and inventory of SN74LVT245DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT245DW is usually 5 days.
3.What payment methods are accepted for SN74LVT245DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT245DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVT245DW?
SN74LVT245DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT245DW 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 SN74LVT245DW?
For technical support, including SN74LVT245DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT245DW requirements.
6.How does Aetrix verify that SN74LVT245DW is sourced from the original manufacturer or authorized distributors?
All SN74LVT245DW 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 SN74LVT245DW meets industry standards.
7.What is the process for return or replacement of SN74LVT245DW?
All SN74LVT245DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT245DW, 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 SN74LVT245DW part is unused and in its original packaging.
Return procedure for SN74LVT245DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVT245DW Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
