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Texas Instruments SN74LVCR2245ADW
- Part No.:
- SN74LVCR2245ADW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVCR2245ADW.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:676
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Product details
Overview
SN74LVCR2245ADW 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, and delivers 6.3 ns max propagation delay at 3.3 V - enabling use in high-speed industrial backplanes and FPGA-to-peripheral interfaces.
For engineers reviewing the SN74LVCR2245ADW datasheet, SN74LVCR2245ADW pinout, SN74LVCR2245ADW application, or SN74LVCR2245ADW equivalent, key selection criteria include its Ioff-enabled partial-power-down capability, 125°C operating temperature range, 5.5-V input overvoltage tolerance, and SOIC-20 package compatibility with legacy board layouts.
Technical Context
The SN74LVCR2245ADW implements a noninverting dual-bus architecture controlled by DIR (direction) and OE (output enable) pins. Its logic flow is fully asynchronous: when OE is low, data propagates either A→B (DIR = high) or B→A (DIR = low); when OE is high, all outputs enter high-impedance state - isolating both buses.
Each of the eight bidirectional I/O channels includes on-die 26-Ω series termination to suppress overshoot/undershoot without external components. The device's Ioff circuitry actively blocks current flow when VCC = 0 V, supporting live insertion and back-drive protection in hot-swap systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables direct interface with 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe connection to 5-V microcontrollers or legacy peripherals while powered from 3.3-V rails. |
| Max Propagation Delay | 6.3 ns at VCC = 3.3 V - supports >100 MHz data rates in point-to-point bus applications. |
| Output Drive Strength | ±12 mA per channel - sufficient to drive 50-Ω transmission lines or multiple CMOS loads without buffering. |
| Ioff Current | ±10 μA at VI/VO = 5.5 V and VCC = 0 V - prevents damaging back-current during partial power-down sequences. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial control, and telecom infrastructure environments. |
| ESD Rating | 2000-V HBM, 1000-V CDM - exceeds JEDEC JESD22-A114 and JESD22-C101 requirements for robust manufacturing handling. |
Pinout & Package
SN74LVCR2245ADW is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm, with standard 0.600-inch body width and 0.050-inch lead pitch. This through-hole-compatible footprint supports legacy reflow and wave-solder processes.
| 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 without clocking. |
| 2–9 (A1–A8) | Bidirectional I/O port A | Connects to source bus (e.g., MCU data bus); tolerates 0–5.5 V regardless of VCC setting. |
| 10 (GND) | Ground reference | Primary return path for all I/O and supply currents; must be low-impedance to minimize ground bounce (VOLP < 0.8 V). |
| 11–18 (B1–B8) | Bidirectional I/O port B | Connects to destination bus (e.g., peripheral or memory interface); electrically identical to A-port pins. |
| 19 (OE) | Output enable input | Active-low control: OE = low enables transceiver; OE = high forces all A/B pins into high-Z isolation state. |
| 20 (VCC) | Power supply | Single-supply rail (1.65–3.6 V); requires local 0.1-μF bypass capacitor placed adjacent to pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω output series resistors | Eliminates need for external termination components, reducing PCB area and BOM count while controlling edge rates. |
| Mixed-voltage interface support | 5.5-V-tolerant inputs allow seamless integration between 3.3-V SoCs and 5-V sensors, displays, or legacy peripherals. |
| Ioff partial-power-down protection | Prevents destructive current flow when VCC is off but signals remain active on A/B buses - essential for hot-plug systems. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes noise coupling into shared ground planes, improving signal integrity in dense multi-channel designs. |
| 125°C maximum operating temperature | Enables deployment in thermally demanding environments such as motor drives, base station RF modules, and engine control units. |
Applications
| Industrial Backplane Interface | FPGA-to-Peripheral Bridge |
|---|---|
|
Use Scenario: Connecting a 3.3-V FPGA I/O bank to multiple 5-V industrial I/O modules across a shared backplane. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver enabling synchronous data exchange without external level shifters. Use Value: Eliminates discrete resistor networks and reduces interconnect skew via matched 6.3 ns tpd across all eight channels. |
Use Scenario: Isolating and translating control signals between a Xilinx Artix-7 FPGA and legacy 5-V optocoupler-based safety circuits. IC Role / Device Role / Timing Role: Direction-controlled, OE-gated buffer providing galvanic separation during configuration and runtime fault conditions. Use Value: Ioff functionality prevents back-driving of FPGA pins during power sequencing mismatches, avoiding latch-up risk. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing a 3.3-V microcontroller to 5-V CAN transceivers and LIN drivers in a vehicle door module. IC Role / Device Role / Timing Role: Robust bidirectional bus translator with extended temperature operation and ESD-hardened I/O. Use Value: 125°C rating and 2000-V HBM protection ensure reliability in under-dash thermal environments with high EMI exposure. |
Use Scenario: Driving calibrated analog front-end inputs from digital pattern generators in automated test equipment (ATE) racks. IC Role / Device Role / Timing Role: Precision-controlled impedance-matched driver stage ensuring clean signal edges into 50-Ω coaxial paths. Use Value: On-chip 26-Ω series termination guarantees consistent rise/fall times and eliminates reflection-induced measurement errors. |
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 VI = VCC + 0.5 V - requires external clamping for 5-V signal sources. | Suitable only in pure 3.3-V systems; not recommended for mixed-voltage interconnects. | Select SN74LVCR2245ADW when interfacing 5-V peripherals; choose SN74LVC245A only if all connected devices operate at ≤3.6 V. |
| SN74AVC245 | Supports lower VCC (1.2–3.6 V) and higher speed (tpd = 3.2 ns @ 3.3 V), but no integrated series resistors. | Requires external 26-Ω resistors per line for overshoot control - increases layout complexity and cost. | Choose SN74AVC245 only for sub-3-V ultra-low-power designs where timing margin is critical and board space permits discrete termination. |
Compared with SN74LVC245A and SN74AVC245, the SN74LVCR2245ADW uniquely combines 5.5-V input tolerance, on-die 26-Ω termination, and Ioff protection - making it the only option that satisfies mixed-voltage, hot-swap, and signal-integrity requirements simultaneously in industrial and automotive bus interfaces.
Availability
SN74LVCR2245ADW is available at Aetrix Electronics and suitable for industrial backplane interfaces, automotive body control modules, FPGA-to-peripheral bridges, and test equipment signal conditioning requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for SN74LVCR2245ADW 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 decades of experience in high-reliability logic and interface solutions.
The SN74LVCR2245ADW belongs to TI's LVCR logic family, engineered specifically for robust mixed-voltage bus translation in harsh industrial and automotive applications where signal integrity, power sequencing resilience, and long-term supply stability are critical.
FAQ
What is the maximum input voltage the SN74LVCR2245ADW can tolerate?
The SN74LVCR2245ADW accepts input voltages up to 5.5 V on all A- and B-port pins, independent of VCC value - enabling direct connection to 5-V logic sources while operating from 1.65–3.6-V supplies. This overvoltage tolerance is explicitly specified in the Absolute Maximum Ratings table and verified across –40°C to 125°C.
Does the SN74LVCR2245ADW require external series resistors for signal integrity?
No. The SN74LVCR2245ADW integrates 26-Ω series resistors on all eight A- and B-port outputs, eliminating the need for external termination components. This design reduces PCB area, simplifies layout, and ensures consistent edge-rate control - confirmed by typical VOLP < 0.8 V and VOHV > 2 V measurements at 3.3 V.
How does the Ioff feature function in the SN74LVCR2245ADW during power-down?
When VCC = 0 V, the Ioff circuitry in the SN74LVCR2245ADW disables all output drivers and blocks current flow between A/B ports and VCC/GND, limiting leakage to ±10 μA. This prevents back-driving and latch-up in partial-power-down scenarios - a requirement validated per JESD78 and documented in Section 9.3 of the datasheet.
What is the propagation delay specification for the SN74LVCR2245ADW at 3.3 V?
The SN74LVCR2245ADW has a maximum propagation delay (tpd) of 6.3 ns at VCC = 3.3 V, TA = 25°C, measured under standard load conditions (CL = 50 pF, ΔV = ±0.3 V). This value is guaranteed across –40°C to 125°C per Table 7.7 in the SCAS581N datasheet.
Which package type does the SN74LVCR2245ADW use, and what are its mechanical dimensions?
The SN74LVCR2245ADW uses a 20-pin SOIC (DW) package with nominal dimensions of 12.80 mm × 7.50 mm and 0.600-inch body width. Its lead pitch is 0.050 inch, and it is rated for Level-1 moisture sensitivity with unlimited floor life - matching legacy industrial PCB assembly standards.
SN74LVCR2245ADW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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-SOIC
SN74LVCR2245ADW FAQ
1.How can I place an order for SN74LVCR2245ADW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR2245ADW 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 SN74LVCR2245ADW reliable?
The price and inventory of SN74LVCR2245ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR2245ADW is usually 5 days.
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Once your SN74LVCR2245ADW 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 SN74LVCR2245ADW?
For technical support, including SN74LVCR2245ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR2245ADW requirements.
6.How does Aetrix verify that SN74LVCR2245ADW is sourced from the original manufacturer or authorized distributors?
All SN74LVCR2245ADW 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 SN74LVCR2245ADW meets industry standards.
7.What is the process for return or replacement of SN74LVCR2245ADW?
All SN74LVCR2245ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR2245ADW, 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 SN74LVCR2245ADW part is unused and in its original packaging.
Return procedure for SN74LVCR2245ADW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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