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Texas Instruments SN74LVCR2245ADGVR
- Part No.:
- SN74LVCR2245ADGVR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVCR2245ADGVR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,371
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Product details
Overview
SN74LVCR2245ADGVR 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 supports mixed-mode signaling (5.5-V-tolerant inputs with 3.3-V VCC), features integrated 26-Ω output series resistors, delivers 6.3 ns max propagation delay at 3.3 V, and enables live insertion via Ioff protection - used in server backplanes and network switch interconnects.
For engineers reviewing the SN74LVCR2245ADGVR datasheet, SN74LVCR2245ADGVR pinout, SN74LVCR2245ADGVR application, or SN74LVCR2245ADGVR equivalent, key selection criteria include voltage translation capability (5.5-V input tolerance), Ioff-enabled partial-power-down operation, 20-pin TVSOP package footprint, and guaranteed 125°C operating temperature range.
Technical Context
The SN74LVCR2245ADGVR implements a dual-bus directional control architecture using DIR to select A→B or B→A data flow and OE to place all eight channels into high-impedance state. Its CMOS design integrates on-die 26-Ω series termination on all outputs to suppress overshoot/undershoot without external components.
It supports true mixed-voltage operation: inputs tolerate up to 5.5 V independent of VCC (1.65–3.6 V), enabling seamless interfacing between 3.3-V logic and legacy 5-V systems. The Ioff circuit actively disables outputs when VCC = 0 V, blocking reverse current during hot-swap or power sequencing events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-voltage embedded rails including 1.8 V, 2.5 V, and 3.3 V systems. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to 5-V peripherals without level-shifting circuitry. |
| Max tpd | 6.3 ns at 3.3 V - Supports high-speed data handshaking in server memory buffers and switch fabric interfaces. |
| Output Series Resistance | 26 Ω (integrated) - Eliminates need for external termination resistors, reducing BOM count and PCB area. |
| Ioff Protection | Active at VCC = 0 V - Prevents damaging back-drive current during live insertion or partial power-down. |
| Operating Temperature | –40°C to 125°C - Qualified for industrial and telecom infrastructure environments with extended thermal margins. |
| ESD Rating | 2000-V HBM, 1000-V CDM - Meets JEDEC standards for robust handling in automated assembly lines. |
Pinout & Package
SN74LVCR2245ADGVR uses a 20-pin Thin Very Small Outline Package (TVSOP) with 5.00 mm × 4.40 mm body size, 0.65 mm lead pitch, and exposed pad for thermal enhancement. Pin 1 orientation follows Q1 quadrant assignment per TI tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 DIR | Direction Control Input | Logic level selects data flow direction: LOW = B-to-A, HIGH = A-to-B. |
| 2–9 A1–A8 | Port A I/O Terminals | Bidirectional data lines connected to source bus; tolerate 5.5 V regardless of VCC. |
| 10 GND | Ground Reference | Primary return path for all internal logic and I/O circuits. |
| 11–18 B1–B8 | Port B I/O Terminals | Bidirectional data lines connected to destination bus; functionally identical to A-side. |
| 19 OE | Output Enable Input | Active-LOW control: asserted LOW enables transceiver; HIGH forces all outputs to high-Z. |
| 20 VCC | Power Supply | Single supply rail (1.65–3.6 V); requires local 0.1-μF bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal translation | 5.5-V-tolerant inputs operate reliably with 3.3-V VCC, enabling drop-in replacement in 3.3/5-V hybrid systems. |
| Integrated 26-Ω output termination | Reduces signal reflections and EMI without discrete resistors - simplifies layout and improves signal integrity on dense PCBs. |
| Ioff partial-power-down support | Prevents current backflow when VCC is unpowered, satisfying hot-swap requirements in modular server and telecom chassis. |
| High-speed performance | 6.3 ns max tpd at 3.3 V ensures compatibility with DDR2/DDR3 memory buffer timing budgets and PCIe Gen1 interconnects. |
| Robust latch-up immunity | >250 mA per JESD17 - guarantees reliability under transient overvoltage and ground bounce conditions. |
Applications
| Wearable Health Sensor Hub | Network Switch Backplane Interface |
|---|---|
|
Use Scenario: Interfacing low-power 1.8-V sensor microcontrollers with 3.3-V wireless transceivers in compact fitness bands. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver managing SPI/I²C data exchange between heterogeneous voltage domains. Use Value: Eliminates external level shifters while maintaining sub-7 ns latency - critical for real-time biometric sampling synchronization. |
Use Scenario: Isolating control-plane processors from high-speed packet forwarding ASICs in enterprise Layer-2 switches. IC Role / Device Role / Timing Role: Octal 3-state bus buffer enabling dynamic bus sharing and hot-swap-safe configuration updates. Use Value: Ioff protection prevents back-drive damage during line-card replacement; 125°C rating supports fanless chassis designs. |
| Industrial PLC I/O Module | Test & Measurement Equipment Bus Extender |
|
Use Scenario: Level-shifting digital I/O signals between 24-V field-side isolators and 3.3-V FPGA-based controller logic. IC Role / Device Role / Timing Role: Direction-controlled transceiver translating status/control bits across galvanically isolated barriers. Use Value: 5.5-V input tolerance accommodates noise-margin degradation in harsh EMI environments without added clamping circuitry. |
Use Scenario: Extending parallel bus connections between mainframe instruments and modular probe cards in automated test systems. IC Role / Device Role / Timing Role: Low-skew, high-Z-isolated bus repeater preserving signal fidelity across multi-board test fixtures. Use Value: Matched 26-Ω output impedance minimizes stub reflections on long ribbon-cable runs - improving measurement repeatability. |
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 | No 5.5-V input tolerance; max VI = VCC + 0.3 V; lacks integrated 26-Ω termination. | Suitable only in single-rail 3.3-V systems without mixed-voltage requirements. | Select when cost sensitivity outweighs voltage translation needs and external termination is acceptable. |
| SN74AVC245 | Supports 1.2-V to 3.6-V VCC; higher speed (4.2 ns tpd); no Ioff; 5-V tolerant only at 3.3-V VCC. | Optimized for ultra-low-voltage mobile SoC interconnects, not industrial hot-swap scenarios. | Choose for battery-powered applications requiring sub-1.8-V operation and tighter timing margins. |
Compared with SN74LVC245A and SN74AVC245, the SN74LVCR2245ADGVR uniquely combines 5.5-V input tolerance, integrated termination, and Ioff - making it the only option qualified for mixed-voltage hot-swap infrastructure where reliability and BOM simplification are mandatory.
Availability
SN74LVCR2245ADGVR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, network switch backplanes, and wearable health sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVCR2245ADGVR 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 50 years of innovation in high-reliability interface ICs.
The SN74LVCR2245ADGVR belongs to TI's LVCR logic family, engineered specifically for robust mixed-voltage communication in mission-critical infrastructure where signal integrity, power sequencing safety, and long-term supply stability are essential.
FAQ
What voltage levels can SN74LVCR2245ADGVR inputs safely accept?
SN74LVCR2245ADGVR inputs tolerate up to 5.5 V regardless of VCC setting (1.65–3.6 V), enabling direct interfacing with 5-V legacy peripherals without external level shifters. This overvoltage capability is explicitly characterized in TI's Electrical Characteristics table and applies to all A- and B-port pins. The SN74LVCR2245ADGVR maintains full functionality and reliability under this condition, as verified across –40°C to 125°C.
Does SN74LVCR2245ADGVR require external series resistors on its outputs?
No, SN74LVCR2245ADGVR does not require external series resistors because it integrates 26-Ω output termination on all eight channels. This feature is documented in the Features section and confirmed in the Electrical Characteristics table under "All Outputs Have Equivalent 26-Ω Series Resistors." The SN74LVCR2245ADGVR's built-in resistance reduces signal reflections and EMI, eliminating two passive components per channel and simplifying PCB layout.
How does SN74LVCR2245ADGVR support hot-swap or live-insertion applications?
SN74LVCR2245ADGVR supports hot-swap via its Ioff circuitry, which disables all outputs when VCC = 0 V, preventing damaging current backflow from powered buses into unpowered circuitry. This behavior is specified in the Features list and Functional Modes table, and is validated per JESD78 latch-up testing (>250 mA). The SN74LVCR2245ADGVR remains safe during partial power-down sequences common in modular server and telecom chassis.
What is the maximum operating temperature for SN74LVCR2245ADGVR?
The SN74LVCR2245ADGVR is fully specified for continuous operation from –40°C to 125°C, as stated in the Recommended Operating Conditions table and confirmed in Switching Characteristics tables covering both –40°C to 85°C and –40°C to 125°C ranges. This extended temperature grade makes the SN74LVCR2245ADGVR suitable for fanless industrial enclosures and outdoor telecom equipment where ambient temperatures exceed standard commercial limits.
Which package type does SN74LVCR2245ADGVR use, and what are its mechanical dimensions?
SN74LVCR2245ADGVR uses the TVSOP (DGV) package: 20-pin, 5.00 mm × 4.40 mm body size, 0.65 mm lead pitch, and Q1 pin-1 orientation per TI's tape-and-reel specification. This compact footprint is documented in the Device Information table and Packaging Addendum, with thermal metrics (RθJA = 114.7°C/W) confirming suitability for thermally constrained layouts. The SN74LVCR2245ADGVR's DGV package balances density, thermal performance, and manufacturability for high-volume SMT assembly.
SN74LVCR2245ADGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- 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:
- 12mA, 12mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TVSOP
SN74LVCR2245ADGVR FAQ
1.How can I place an order for SN74LVCR2245ADGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR2245ADGVR 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 SN74LVCR2245ADGVR reliable?
The price and inventory of SN74LVCR2245ADGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR2245ADGVR is usually 5 days.
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SN74LVCR2245ADGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCR2245ADGVR 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 SN74LVCR2245ADGVR?
For technical support, including SN74LVCR2245ADGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR2245ADGVR requirements.
6.How does Aetrix verify that SN74LVCR2245ADGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVCR2245ADGVR 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 SN74LVCR2245ADGVR meets industry standards.
7.What is the process for return or replacement of SN74LVCR2245ADGVR?
All SN74LVCR2245ADGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR2245ADGVR, 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 SN74LVCR2245ADGVR part is unused and in its original packaging.
Return procedure for SN74LVCR2245ADGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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