My Inquiry
My Account
Texas Instruments SN74LVC245ADWR
- Part No.:
- SN74LVC245ADWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVC245ADWR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,809
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVC245ADWR from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for bidirectional asynchronous data bus communication between 1.65-V and 3.6-V logic domains. It supports mixed-mode signal operation (5-V inputs with 3.3-V VCC), delivers 6.3 ns max propagation delay at 3.3 V, and features Ioff for live insertion and back-drive protection - used in LED display drivers and telecom infrastructure backplanes.
For engineers reviewing the SN74LVC245ADWR datasheet, SN74LVC245ADWR pinout, SN74LVC245ADWR application, or SN74LVC245ADWR equivalent, key selection criteria include its 20-pin SOIC (DW) package, 3.6-V absolute maximum input tolerance, ±24-mA output drive at 3 V, Ioff-enabled partial-power-down capability, and direction-controlled 8-bit bidirectional data flow.
Technical Context
The SN74LVC245ADWR implements a dual-bus, direction-controlled CMOS transceiver architecture with independent DIR and OE control inputs. Its logic-level translation capability enables interoperability between 5-V legacy peripherals and 3.3-V/1.8-V system-on-chip buses without external level shifters.
It operates across –40°C to +125°C with guaranteed performance under 1.65–3.6-V supply, supports up to 5.5-V input overvoltage tolerance, and incorporates robust ESD protection (2000-V HBM, 1000-V CDM) and latch-up immunity exceeding 250 mA per JESD17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables direct interface with modern low-voltage microcontrollers and FPGAs without level-shifting circuitry. |
| Max Propagation Delay | 6.3 ns at 3.3 V - Supports high-speed data transfer in real-time industrial bus interfaces and LED column drivers. |
| Input Voltage Tolerance | Up to 5.5 V - Allows safe connection to 5-V legacy sensors, switches, or logic without clamping diodes or resistors. |
| Ioff Current | <±10 µA at 5.5 V - Ensures isolation during hot-swap or partial power-down, preventing back-current damage to powered subsystems. |
| Output Drive Strength | ±24 mA at 3 V - Sufficient to directly drive 50-Ω PCB traces or multiple CMOS inputs without external buffers. |
| ESD Rating | 2000-V HBM, 1000-V CDM - Meets industrial-grade handling requirements without additional board-level protection. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive modules, base station RF front-ends, and factory automation controllers. |
Pinout & Package
SN74LVC245ADWR uses a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm, with standard 0.300-inch body width and 0.050-inch lead pitch. Pin numbering follows JEDEC MS-013, compatible with automated placement and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | High = A→B data flow; Low = B→A data flow - enables flexible bus arbitration in master/slave or peer-to-peer topologies. |
| 19 (OE) | Output Enable Input | Low = outputs active; High = all outputs in high-impedance state - allows dynamic bus sharing among multiple transceivers on same lines. |
| A1–A8 (Pins 2–9) | Port A I/O Terminals | Bidirectional data pins tied to one bus segment (e.g., microcontroller side); tolerate 5.5-V inputs regardless of VCC. |
| B1–B8 (Pins 11–18) | Port B I/O Terminals | Bidirectional data pins tied to second bus segment (e.g., peripheral or display side); fully 3.3-V compatible with strong drive. |
| 10 (GND) | Ground Reference | Primary return path for all I/O and supply currents; must be low-inductance connection to minimize ground bounce. |
| 20 (VCC) | Power Supply | Single supply input for core logic and I/O; requires local 0.1-µF ceramic bypass capacitor placed within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage translation | 5-V-tolerant inputs with 1.65–3.6-V VCC enable direct interfacing between legacy 5-V peripherals and modern low-voltage SoCs. |
| Ioff partial-power-down protection | Prevents damaging current backflow when VCC = 0 V while inputs remain at 5.5 V - essential for hot-pluggable I/O expansion cards. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes noise coupling into adjacent analog or RF circuits during simultaneous 8-bit switching - critical in mixed-signal systems. |
| Fast 3.3-V switching (tpd ≤ 6.3 ns) | Supports >80-MHz data rates on short traces, enabling use in high-refresh-rate LED matrix controllers and packetized sensor interfaces. |
| Robust latch-up immunity (>250 mA) | Guarantees no destructive latch-up under transient overvoltage or ESD events - validated per JESD17 for industrial reliability. |
Applications
| LED Display Driver Interface | Industrial I/O Expander |
|---|---|
|
Use Scenario: Driving 8-bit column data from a 3.3-V FPGA to a 5-V LED matrix with common-anode configuration. IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing data flow direction and isolating FPGA I/O during blanking intervals. Use Value: Eliminates need for discrete MOSFET translators; 5.5-V input tolerance protects FPGA pins from LED sink-driver leakage currents. |
Use Scenario: Extending GPIO count of a PLC controller by connecting remote 5-V digital input modules via twisted-pair cabling. IC Role / Device Role / Timing Role: Isolating and translating signals between 3.3-V controller logic and 5-V field-side optocoupler inputs. Use Value: Ioff prevents backfeed during module hot-swap; ±24-mA drive ensures reliable signal integrity over 10-m cable runs. |
| Telecom Backplane Interconnect | Motor Driver Logic Interface |
|
Use Scenario: Interfacing a 3.3-V baseband processor to legacy 5-V line-card management buses in modular optical transport equipment. IC Role / Device Role / Timing Role: Direction-controlled transceiver synchronizing status register reads and firmware update writes across voltage domains. Use Value: 6.3-ns tpd meets 100-MHz backplane timing budgets; 125°C rating supports operation near power converters. |
Use Scenario: Connecting a 3.3-V MCU to 5-V H-bridge gate drivers in a brushless DC motor control board. IC Role / Device Role / Timing Role: Level-shifting PWM and direction signals while providing fault feedback isolation during driver shutdown. Use Value: VOLP < 0.8 V prevents false triggering of gate drivers during fast PWM edge transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC245DBR | Lower VCC range (1.2–3.6 V), faster tpd (3.8 ns @ 1.8 V), but only 3.6-V max input tolerance. | Better suited for ultra-low-voltage SoC interconnects; not recommended where 5-V inputs are present. | Select SN74AVC245DBR only if system operates below 3.3 V and requires sub-4-ns timing; retain SN74LVC245ADWR for 5-V-tolerant designs. |
| 74LVC245APW | Identical electrical specs, but in 20-pin TSSOP (PW) package (6.50 mm × 4.40 mm) - 44% smaller footprint than SOIC. | Preferred for space-constrained PCBs; thermal resistance higher (RθJA = 83.6°C/W vs. 78°C/W for DW), limiting high-duty-cycle use. | Choose 74LVC245APW for compact layouts with adequate airflow; select SN74LVC245ADWR for thermal margin in enclosed enclosures or high-reliability industrial use. |
Compared with SN74AVC245DBR and 74LVC245APW, SN74LVC245ADWR uniquely balances 5.5-V input tolerance, SOIC manufacturability, and thermal robustness - making it the preferred choice for industrial and telecom applications requiring field-serviceable, high-reliability bus isolation.
Availability
SN74LVC245ADWR is available at Aetrix Electronics and suitable for LED display drivers, industrial I/O expanders, telecom backplane interconnects, and motor driver logic interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC245ADWR 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 and embedded processing solutions, with over 50 years of innovation in logic, interface, and power management ICs.
The SN74LVC245ADWR belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for robust mixed-voltage system integration in industrial, telecom, and automotive applications where reliability, wide VCC range, and I/O ruggedness are critical.
FAQ
What is the maximum input voltage the SN74LVC245ADWR can tolerate?
The SN74LVC245ADWR accepts input voltages up to 5.5 V on all A- and B-port pins, regardless of VCC level (1.65–3.6 V). This overvoltage tolerance allows direct connection to 5-V logic without external clamping or level-shifting components, simplifying design in mixed-voltage systems. The specification is guaranteed across the full operating temperature range (–40°C to +125°C).
Does the SN74LVC245ADWR support hot-swap or partial-power-down operation?
Yes, the SN74LVC245ADWR includes Ioff circuitry that disables outputs and limits off-state current to ±10 µA when VCC = 0 V and inputs are at 5.5 V. This feature prevents damaging back-current flow during live insertion of daughterboards or power sequencing mismatches - a key requirement for modular telecom and industrial control systems using SN74LVC245ADWR.
What is the propagation delay of the SN74LVC245ADWR at 3.3 V?
At VCC = 3.3 V and TA = 25°C, the SN74LVC245ADWR has a maximum propagation delay (tpd) of 6.3 ns for A↔B data transmission. This value is measured under standard load conditions (CL = 50 pF) and ensures compatibility with high-speed digital interfaces such as parallel LCD controllers and FPGA-to-ASIC data bridges using SN74LVC245ADWR.
Which package type does the SN74LVC245ADWR use?
The SN74LVC245ADWR uses a 20-pin SOIC (DW) package with dimensions 12.80 mm × 7.50 mm and standard 0.300-inch body width. It is supplied in large tape-and-reel format (2000 units/reel), optimized for automated SMT assembly. This package offers superior thermal dissipation (RθJA = 78°C/W) compared to TSSOP or TVSOP variants of the same device.
Can the SN74LVC245ADWR translate between 1.8-V and 5-V logic levels?
Yes, the SN74LVC245ADWR supports down-translation from 5-V inputs to 1.8-V outputs when VCC = 1.8 V, and also operates with VCC = 3.3 V while accepting 5-V inputs. Its input structure is designed for voltage-domain independence - meaning the SN74LVC245ADWR reliably converts logic states across these combinations without external biasing or resistors, as confirmed in TI's Feature Description section.
SN74LVC245ADWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74LVC245ADWR FAQ
1.How can I place an order for SN74LVC245ADWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC245ADWR 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 SN74LVC245ADWR reliable?
The price and inventory of SN74LVC245ADWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC245ADWR is usually 5 days.
3.What payment methods are accepted for SN74LVC245ADWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC245ADWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC245ADWR?
SN74LVC245ADWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC245ADWR 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 SN74LVC245ADWR?
For technical support, including SN74LVC245ADWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC245ADWR requirements.
6.How does Aetrix verify that SN74LVC245ADWR is sourced from the original manufacturer or authorized distributors?
All SN74LVC245ADWR 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 SN74LVC245ADWR meets industry standards.
7.What is the process for return or replacement of SN74LVC245ADWR?
All SN74LVC245ADWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC245ADWR, 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 SN74LVC245ADWR part is unused and in its original packaging.
Return procedure for SN74LVC245ADWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVC245ADWR 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…
