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Texas Instruments SN74LVC245ADGVR
- Part No.:
- SN74LVC245ADGVR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC245ADGVR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,026
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Product details
Overview
SN74LVC245ADGVR from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for bidirectional asynchronous data transfer between 1.65-V to 3.6-V buses. It features direction control (DIR), output enable (OE), 8 I/O channels per side, 6.3 ns max propagation delay at 3.3 V, and 5.5-V-tolerant inputs - enabling use in mixed-voltage systems such as 5-V microcontroller interfacing with 3.3-V peripherals.
For engineers reviewing the SN74LVC245ADGVR datasheet, SN74LVC245ADGVR pinout, SN74LVC245ADGVR application, or SN74LVC245ADGVR equivalent, key selection criteria include voltage translation capability (5 V ↔ 3.3 V), Ioff support for live insertion, 3-state isolation timing (ten/tdis), and TVSOP-20 package compatibility with high-density PCB layouts.
Technical Context
This device implements a dual-bus, bidirectional transceiver architecture with independent DIR and OE controls. Its CMOS design supports mixed-mode signal operation: inputs tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), enabling robust level-shifting without external components. The Ioff circuitry actively disables outputs during partial power-down, preventing back-drive current.
Functional modes are strictly defined by OE and DIR logic: OE = low enables bidirectional flow (DIR = high → A→B; DIR = low → B→A); OE = high forces all outputs into high-impedance state. No internal latching or clocking - purely combinatorial data path with propagation delay dependent on load capacitance and supply voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports single-supply operation across 1.8-V, 2.5-V, and 3.3-V logic domains |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to 5-V sources without level-shifters in mixed-voltage systems |
| Max Propagation Delay | 6.3 ns at VCC = 3.3 V, CL = 50 pF - ensures timing compliance in high-speed bus interfaces up to ~80 MHz |
| Ioff Support | Active during power-down - blocks current flow when VCC = 0 V, enabling hot-plug and partial-power-down system designs |
| ESD Rating | 2000-V HBM, 1000-V CDM - meets industrial-grade robustness requirements for board-level handling and operation |
| Output Drive | ±24 mA at VCC = 3.0 V - sufficient to drive moderate capacitive loads and multiple CMOS inputs without buffering |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control applications |
Pinout & Package
SN74LVC245ADGVR uses the TVSOP-20 (DGV) package: 5.00 mm × 4.40 mm body, 0.65-mm lead pitch, 20-pin surface-mount with exposed pad (no thermal pad connection required per datasheet). Pin numbering follows standard top-view orientation for DB/DGV/DW/N/NS/PW/RGY packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | High = A→B data flow; Low = B→A data flow - determines real-time bus directionality |
| 2–9 (A1–A8) | Transceiver I/O Port A | Bidirectional data pins connected to source bus (e.g., MCU or FPGA); tolerate 5.5 V inputs |
| 10 (GND) | Ground Reference | Primary return path for all I/O and supply currents; must be low-impedance for noise control |
| 11–18 (B1–B8) | Transceiver I/O Port B | Bidirectional data pins connected to destination bus (e.g., peripheral or memory); same voltage tolerance as A-side |
| 19 (OE) | Output Enable Input | Low = enable transceiver; High = force all A/B pins into high-impedance state - critical for bus arbitration |
| 20 (VCC) | Power Supply | Single supply input (1.65–3.6 V); requires local 0.1-μF bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage translation | Enables direct interface between 5-V logic and 1.65–3.6-V systems without external translators or resistors |
| Ioff partial-power-down protection | Prevents damaging back-current when VCC = 0 V - essential for hot-swap and modular system architectures |
| 3-state output isolation | OE-controlled high-impedance state eliminates bus contention during multi-master or shared-bus operation |
| Low ground bounce (VOLP < 0.8 V) | Reduces switching noise coupling into sensitive analog sections when driving heavy capacitive loads |
| Latch-up immunity > 250 mA | Guarantees robust operation under transient overvoltage or ESD events per JESD17 standards |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Interfacing a 5-V legacy I/O expansion module to a 3.3-V ARM-based controller in a programmable logic controller rack. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between CPU and peripheral modules; DIR toggled per command cycle, OE asserted only during valid transfers. Use Value: Eliminates need for discrete level shifters, reduces BOM count, and maintains timing integrity with sub-7-ns propagation delay at 3.3 V. | Use Scenario: Isolating CAN controller GPIOs from 5-V sensor array in a vehicle body control unit operating across –40°C to +125°C. IC Role / Device Role / Timing Role: Voltage-tolerant I/O buffer providing 5-V input reception and 3.3-V output drive while supporting hot-replacement of sensor boards. Use Value: Ioff functionality prevents backfeed during sensor hot-swap; 125°C rating ensures reliability in engine bay proximity. |
| LED Display Driver Interface | Network Switch Management Bus |
Use Scenario: Driving multiplexed 5-V LED segments from a 3.3-V FPGA I/O bank in a public signage system. IC Role / Device Role / Timing Role: Unidirectional (A→B) driver translating FPGA logic levels to higher-current 5-V segment lines; OE used for blanking control. Use Value: ±24-mA drive capability directly sinks LED current without external transistors; 5.5-V input tolerance protects FPGA pins. | Use Scenario: Connecting a 3.3-V management MCU to legacy 5-V EEPROM and reset supervisor ICs on a 10-GbE switch control plane. IC Role / Device Role / Timing Role: Bidirectional configuration bus transceiver; DIR set statically for read/write direction, OE synchronized with I²C clock edges. Use Value: Enables drop-in replacement of obsolete 5-V-only bus buffers while maintaining full timing margins per I²C spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | TSSOP-20 package (6.50 mm × 4.40 mm); identical electrical specs and pinout | Slightly larger footprint; better thermal dissipation but lower density than TVSOP | Select when board layout allows marginally larger package and enhanced thermal performance is prioritized |
| 74LVC245ABQ | DFN-20 (RGY) package (4.50 mm × 3.50 mm); same logic and voltage specs, different pin mapping | Smaller footprint and improved thermal resistance (RθJA = 44.0°C/W), but requires PCB redesign | Choose for space-constrained designs where thermal efficiency outweighs layout change cost |
Compared with SN74LVC245ADGVR, SN74LVC245APWR offers identical functionality in a mechanically distinct TSSOP package, while 74LVC245ABQ delivers superior thermal performance in a smaller DFN format - both require no logic redesign but differ in board integration effort and thermal profile.
Availability
SN74LVC245ADGVR is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, LED display systems, and network infrastructure requiring stable component supply and long-term manufacturability.
Supply support for SN74LVC245ADGVR 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 SN74LVC245A product line delivers robust, voltage-flexible bus interface solutions for mixed-signal systems - engineered specifically for reliable bidirectional data transfer in harsh environments and multi-rail architectures.
FAQ
What voltage levels can SN74LVC245ADGVR safely interface between?
SN74LVC245ADGVR supports bidirectional level translation between 5-V and 1.65–3.6-V systems. Its inputs tolerate up to 5.5 V regardless of VCC setting, allowing direct connection to 5-V sources while driving 3.3-V or 1.8-V loads. This makes SN74LVC245ADGVR ideal for bridging legacy 5-V peripherals with modern low-voltage controllers without external components.
Does SN74LVC245ADGVR support hot-plug or partial-power-down operation?
Yes, SN74LVC245ADGVR includes Ioff circuitry that disables outputs when VCC = 0 V, preventing back-current flow during live insertion or partial power-down. This feature is explicitly characterized and guaranteed per JESD78, making SN74LVC245ADGVR suitable for modular systems where boards may be inserted or removed while other sections remain powered.
What is the maximum data rate supported by SN74LVC245ADGVR?
SN74LVC245ADGVR does not specify a fixed data rate but delivers a maximum propagation delay of 6.3 ns at 3.3 V with 50-pF load. This corresponds to usable operation up to approximately 80 MHz in well-terminated, low-capacitance bus configurations. Actual achievable rate depends on trace length, load capacitance, and noise margin - SN74LVC245ADGVR is optimized for asynchronous parallel bus applications rather than serial protocols.
How should unused inputs be handled on SN74LVC245ADGVR?
All unused inputs on SN74LVC245ADGVR - including DIR and OE - must be tied to a valid logic level (VCC or GND) to prevent floating states that cause excessive current draw or undefined operation. TI recommends pull-up resistors on OE for default high-impedance startup, and fixed logic levels on DIR based on required data flow direction. Floating inputs violate recommended operating conditions and risk latch-up.
Is SN74LVC245ADGVR pin-compatible with other LVC245 variants?
SN74LVC245ADGVR is pin-compatible with all SN74LVC245A variants in DB, DW, N, NS, PW, and RGY packages - same 20-pin functional mapping and electrical behavior. However, mechanical dimensions and thermal characteristics differ: TVSOP (DGV) has 5.00 mm × 4.40 mm body and 0.65-mm pitch, while RGY (VQFN) is 4.50 mm × 3.50 mm with 0.5-mm pitch and requires different land pattern.
SN74LVC245ADGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TFSOP (0.173", 4.40mm 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-TVSOP
SN74LVC245ADGVR FAQ
1.How can I place an order for SN74LVC245ADGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC245ADGVR 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 SN74LVC245ADGVR reliable?
The price and inventory of SN74LVC245ADGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC245ADGVR is usually 5 days.
3.What payment methods are accepted for SN74LVC245ADGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC245ADGVR transactions.
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4.How is shipping managed for SN74LVC245ADGVR?
SN74LVC245ADGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC245ADGVR 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 SN74LVC245ADGVR?
For technical support, including SN74LVC245ADGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC245ADGVR requirements.
6.How does Aetrix verify that SN74LVC245ADGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVC245ADGVR 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 SN74LVC245ADGVR meets industry standards.
7.What is the process for return or replacement of SN74LVC245ADGVR?
All SN74LVC245ADGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC245ADGVR, 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 SN74LVC245ADGVR part is unused and in its original packaging.
Return procedure for SN74LVC245ADGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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