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Texas Instruments SN74LVCR2245AGQNR
- Part No.:
- SN74LVCR2245AGQNR
- Manufacturer:
- Texas Instruments
- Package:
- 20-VFBGA
- Datasheet:
-
SN74LVCR2245AGQNR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,058
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Product details
Overview
SN74LVCR2245AGQNR from Texas Instruments is an octal noninverting bus transceiver with 3-state outputs, designed for bidirectional data flow between A and B buses in mixed-voltage systems. It operates from 1.65 V to 3.6 V, accepts 5.5-V-tolerant inputs, delivers 6.3 ns max propagation delay at 3.3 V, and integrates 26-Ω output series resistors-enabling direct interface between 3.3-V logic and legacy 5-V peripherals in server backplanes.
For engineers reviewing the SN74LVCR2245AGQNR datasheet, SN74LVCR2245AGQNR pinout, SN74LVCR2245AGQNR application, or SN74LVCR2245AGQNR equivalent, key selection criteria include Ioff-enabled live insertion support, ±12 mA output drive capability per channel, 26-Ω on-die termination, -40°C to 125°C operating range, and VQFN-20 (RGY) package compatibility with high-density PCB layouts.
Technical Context
This device implements asynchronous bidirectional data translation using a single DIR control input to select A→B or B→A directionality, while OE independently enables/disables all eight channels into high-impedance state. Its Ioff circuitry ensures zero current backflow when VCC = 0 V, supporting partial-power-down operation in hot-swap systems.
The integrated 26-Ω series output resistance suppresses signal overshoot/undershoot without external components, and input voltage tolerance up to 5.5 V allows safe interfacing with 5-V drivers even when VCC is as low as 1.65 V-making it suitable for level-shifting in heterogeneous voltage domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports dual-supply systems and low-power operation down to 1.65 V |
| Input Voltage Tolerance | Up to 5.5 V - enables direct connection to 5-V logic without external level shifters |
| Max tpd | 6.3 ns at 3.3 V - ensures sub-7 ns latency for high-speed inter-bus communication |
| Output Drive | ±12 mA per channel - sufficient to drive standard CMOS loads and terminated lines |
| Ioff Support | Active at VCC = 0 V - prevents damaging back-current during live insertion or power sequencing |
| Operating Temp | -40°C to +125°C - qualified for industrial and extended-temperature embedded applications |
| ESD Rating | 2000-V HBM - meets JEDEC JS-001 for robust handling in manufacturing environments |
Pinout & Package
VQFN-20 (RGY) package, 4.50 mm × 3.50 mm body size, 0.5-mm pitch, wettable flank terminals, exposed thermal pad.
| 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) | Port A I/O | Bidirectional data pins for A-side bus - tolerate 5.5 V regardless of VCC level |
| 10 (GND) | Ground Reference | Primary return path for logic and output currents - must be low-inductance connection |
| 11–18 (B8–B1) | Port B I/O | Bidirectional data pins for B-side bus - electrically identical to A-port with same voltage tolerance |
| 19 (OE) | Output Enable Input | Low = outputs active; High = all outputs in high-Z - used for bus isolation and power sequencing |
| 20 (VCC) | Supply Voltage | 1.65–3.6 V core supply - requires local 0.1-μF bypass capacitor adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω Output Resistors | Eliminates need for external series termination, reducing BOM count and PCB area while controlling edge rates |
| 5.5-V-Tolerant Inputs | Allows interoperability with 5-V logic families without level translators, simplifying mixed-voltage board design |
| Ioff Partial-Power-Down Protection | Blocks reverse current flow when VCC is off, enabling safe hot-plug operation in modular systems |
| 26-ns Max Ground Bounce (VOLP) | Minimizes noise coupling into shared ground planes during simultaneous switching of multiple outputs |
| Back-Drive Protection | Prevents damage when outputs are driven by external sources while device is unpowered or disabled |
Applications
| Server Backplane Interfacing | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Connecting 3.3-V FPGA control logic to legacy 5-V peripheral cards in rack-mounted server chassis. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver managing data flow between mismatched voltage domains. Use Value: Eliminates discrete level shifters and termination resistors, reducing interconnect complexity and improving signal integrity at 100+ MHz clock rates. | Use Scenario: Isolating microcontroller GPIOs from noisy 24-V field I/O circuits in programmable logic controllers. IC Role / Device Role / Timing Role: Direction-controlled buffer with Ioff protection for safe hot-swap module replacement. Use Value: Enables maintenance without system shutdown; 125°C rating supports operation in enclosed control cabinets. |
| Network Switch ASIC Interface | Test Equipment Digital Pattern Generators |
Use Scenario: Interfacing 3.3-V packet processor ASICs to 5-V PHY layer devices in enterprise-grade Ethernet switches. IC Role / Device Role / Timing Role: Low-latency octal transceiver providing deterministic 6.3 ns propagation delay for timing-critical data paths. Use Value: Meets tight setup/hold timing budgets across voltage domains while maintaining signal fidelity via on-die 26-Ω termination. | Use Scenario: Driving high-speed digital stimulus patterns from FPGA-based pattern generators into DUTs with varying input voltage requirements. IC Role / Device Role / Timing Role: Programmable-direction bus buffer supporting both sourcing and sinking modes with precise edge control. Use Value: Reduces pattern generator channel count by enabling bidirectional test vector injection without external multiplexing. |
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 | Lacks 5.5-V input tolerance; max VCC = 3.6 V but inputs limited to VCC + 0.3 V | Not suitable for 5-V-to-3.3-V translation; requires external clamping or level shifters | Select SN74LVCR2245AGQNR when interfacing 5-V sources directly to 3.3-V logic |
| SN74AVC245 | Supports lower VCC (1.2 V–3.6 V); no integrated 26-Ω resistors; higher speed (3.5 ns tpd) | Better for ultra-low-voltage systems but requires external termination and lacks Ioff protection | Choose SN74LVCR2245AGQNR for industrial hot-swap reliability and simplified layout over raw speed |
Compared with SN74LVC245A and SN74AVC245, SN74LVCR2245AGQNR uniquely combines 5.5-V input tolerance, on-die 26-Ω termination, and Ioff protection-making it the only option among the three that eliminates external components while supporting safe live insertion in mixed-voltage infrastructure.
Availability
SN74LVCR2245AGQNR is available at Aetrix Electronics and suitable for server backplane interfacing, industrial PLC I/O modules, and network switch ASIC interface requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVCR2245AGQNR 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 company delivering analog and embedded processing solutions, with leadership in logic, power management, and interface ICs for industrial, automotive, and communications markets.
The SN74LVCR2245AGQNR belongs to TI's LVCR logic family, engineered specifically for robust mixed-voltage bus translation in mission-critical infrastructure where reliability, Ioff safety, and signal integrity are non-negotiable.
FAQ
What is the maximum input voltage the SN74LVCR2245AGQNR can tolerate?
The SN74LVCR2245AGQNR accepts input voltages up to 5.5 V on all A- and B-port pins, regardless of VCC level-enabling direct interface with 5-V logic families without external clamping or level-shifting circuitry. This specification is guaranteed across the full operating temperature range (-40°C to 125°C) and is independent of the 1.65–3.6 V VCC supply voltage.
Does the SN74LVCR2245AGQNR require external series resistors for signal integrity?
No, the SN74LVCR2245AGQNR does not require external series resistors because it integrates 26-Ω output series resistors on all eight channels. These on-die resistors suppress overshoot and undershoot, reduce EMI, and improve signal integrity on transmission lines-eliminating two external components per channel and saving PCB space in dense layouts.
How does the Ioff feature of the SN74LVCR2245AGQNR support hot-swap applications?
The Ioff feature in the SN74LVCR2245AGQNR disables all outputs and blocks current backflow when VCC = 0 V, allowing safe insertion or removal of the device while other system components remain powered. This protects upstream drivers and downstream loads from latch-up or damage during live module replacement-critical for telecom and server chassis designs.
What is the propagation delay of the SN74LVCR2245AGQNR at 3.3 V?
The SN74LVCR2245AGQNR has a maximum propagation delay (tpd) of 6.3 ns at VCC = 3.3 V, TA = 25°C, with typical values lower under nominal conditions. This delay applies to both A→B and B→A directions and remains within 7.3 ns across the full -40°C to 125°C operating range, ensuring predictable timing in high-speed synchronous bus architectures.
Which package type does the SN74LVCR2245AGQNR use, and what are its key mechanical features?
The SN74LVCR2245AGQNR uses the VQFN-20 (RGY) package: 4.50 mm × 3.50 mm body, 0.5-mm pitch, wettable flank terminals, and an exposed thermal pad. Its compact footprint supports high-density routing, while the flanked leads enable reliable automated optical inspection (AOI) and solder joint quality verification in surface-mount assembly.
SN74LVCR2245AGQNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 20-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-BGA MICROSTAR JUNIOR (4x3)
SN74LVCR2245AGQNR FAQ
1.How can I place an order for SN74LVCR2245AGQNR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR2245AGQNR 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 SN74LVCR2245AGQNR reliable?
The price and inventory of SN74LVCR2245AGQNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR2245AGQNR is usually 5 days.
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Once your SN74LVCR2245AGQNR 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 SN74LVCR2245AGQNR?
For technical support, including SN74LVCR2245AGQNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR2245AGQNR requirements.
6.How does Aetrix verify that SN74LVCR2245AGQNR is sourced from the original manufacturer or authorized distributors?
All SN74LVCR2245AGQNR 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 SN74LVCR2245AGQNR meets industry standards.
7.What is the process for return or replacement of SN74LVCR2245AGQNR?
All SN74LVCR2245AGQNR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR2245AGQNR, 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 SN74LVCR2245AGQNR part is unused and in its original packaging.
Return procedure for SN74LVCR2245AGQNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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