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Texas Instruments SN74LVCR2245APW
- Part No.:
- SN74LVCR2245APW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVCR2245APW.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:507
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Product details
Overview
SN74LVCR2245APW from Texas Instruments is an octal noninverting 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 robust level translation in compact embedded interconnects.
For engineers reviewing the SN74LVCR2245APW datasheet, SN74LVCR2245APW pinout, SN74LVCR2245APW application, or SN74LVCR2245APW equivalent, key selection criteria include Ioff-enabled live insertion support, guaranteed 125°C operation, 5.5-V input overvoltage tolerance, and TSSOP-20 package compatibility with high-density PCB layouts.
Technical Context
This device implements dual-bus directional control via DIR and 3-state enable via OE, supporting A→B or B→A data flow with isolation when OE is high. Its CMOS architecture enables rail-to-rail input voltage acceptance (0–5.5 V) independent of VCC, making it suitable for voltage-level bridging in heterogeneous digital systems.
All eight channels feature matched 26-Ω on-die series termination, eliminating external resistors while suppressing overshoot/undershoot. The Ioff circuit ensures <±10 µA leakage when VCC = 0 V, enabling safe partial-power-down and back-drive protection during hot-swap or power sequencing events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports single-supply operation across low-voltage logic families including 1.8-V, 2.5-V, and 3.3-V systems. |
| Input Voltage Max | 5.5 V - enables direct interfacing with 5-V legacy peripherals without external level-shifting circuitry. |
| tpd (Max) | 6.3 ns at VCC = 3.3 V - ensures sub-7 ns latency for high-speed bus arbitration and real-time data forwarding. |
| Output Drive | ±12 mA per channel - sufficient to drive standard CMOS loads and moderate capacitive traces without buffering. |
| Ioff Leakage | ±10 µA at VI/VO = 5.5 V, VCC = 0 V - prevents damaging back-current during power-down or hot-plug scenarios. |
| Operating Temp | –40°C to +125°C - qualified for industrial, automotive under-hood, and extended-temperature embedded applications. |
| ESD Rating | 2000-V HBM, 1000-V CDM - exceeds JEDEC standards for handling robustness in automated assembly and field service. |
Pinout & Package
TSSOP-20 package (6.50 mm × 4.40 mm body size), lead-free with NiPdAu finish, MSL Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 DIR | Direction control input | Low = B→A data flow; High = A→B data flow - determines signal path polarity for all eight channels. |
| 2–9 A1–A8 | Port A bidirectional I/O | Connects to source bus; accepts 0–5.5 V inputs regardless of VCC; drives 3.3-V logic levels when enabled. |
| 10 GND | Ground reference | Primary return path for all internal logic and I/O current; must be low-impedance and decoupled locally. |
| 11–18 B1–B8 | Port B bidirectional I/O | Connects to destination bus; functionally identical to A-port with same voltage tolerance and drive strength. |
| 19 OE | Output enable input | Low = outputs active; High = all A/B pins enter high-impedance state - enables bus isolation and multi-drop sharing. |
| 20 VCC | Power supply | Supplies core logic and I/O buffers; requires local 0.1-µF ceramic bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω series termination | Eliminates need for eight external resistors, reducing BOM count and PCB area while controlling edge ringing on 50-Ω traces. |
| Mixed-voltage interface support | Accepts 5-V inputs while operating from 1.65–3.6-V VCC - enables seamless integration between legacy 5-V controllers and modern low-voltage FPGAs or MCUs. |
| Ioff partial-power-down protection | Prevents destructive current flow when VCC is off but signals remain present on A/B ports - essential for hot-swap and modular system designs. |
| Guaranteed 125°C operation | Validated switching performance up to +125°C ambient - supports deployment in thermally demanding environments like industrial motor drives and telecom base stations. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes noise coupling into shared ground planes during simultaneous switching - improves signal integrity in dense multi-channel systems. |
Applications
| Wearable Health Monitoring | Industrial Network Switches |
|---|---|
Use Scenario: Interfacing a 5-V analog front-end sensor hub with a 3.3-V ARM Cortex-M4 microcontroller in a compact fitness tracker. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator managing SPI/UART data exchange between mismatched voltage domains. Use Value: Eliminates discrete level-shifters and pull-up networks, reducing component count by 6+ parts while maintaining 6.3 ns timing margin for real-time biometric sampling. |
Use Scenario: Enabling hot-swappable module communication in a DIN-rail mounted Ethernet switch with redundant 3.3-V control plane and 5-V PHY interfaces. IC Role / Device Role / Timing Role: Isolation transceiver coordinating configuration registers and status flags between powered-down line cards and active management MCU. Use Value: Ioff protection prevents back-driving during card insertion/removal, and 26-Ω termination suppresses EMI from 100-MHz backplane traces. |
| Server Baseboard Management | Automated Test Equipment |
Use Scenario: Connecting a 1.8-V BMC (Baseboard Management Controller) to legacy 5-V IPMI sensors and fan controllers on a rack-mount server motherboard. IC Role / Device Role / Timing Role: Asynchronous bus transceiver translating SMBus/I²C-compatible control signals with direction auto-controlled via GPIO. Use Value: Single-chip solution replaces dual-directional discrete translators, cuts layout space by 40%, and guarantees timing compliance across –40°C to +125°C thermal cycling. |
Use Scenario: Routing parallel test patterns between a 3.3-V pattern generator FPGA and 5-V DUT (Device Under Test) in high-speed boundary-scan validation fixtures. IC Role / Device Role / Timing Role: Programmable-direction bus buffer synchronizing 100-MHz test vectors while providing fail-safe isolation during fault injection. Use Value: Integrated 26-Ω termination ensures clean edges into 50-Ω coaxial cabling, and 125°C rating supports continuous burn-in operation without derating. |
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 + 0.5 V; lacks integrated 26-Ω resistors. | Requires external series resistors and clamping diodes for 5-V interface; not suitable for true mixed-voltage translation. | Select only if operating strictly within 1.65–3.6-V domain and board space allows added passives. |
| TXB0108 | Auto-direction sensing; no DIR pin; higher ICC (100 µA typical); smaller 20-pin VQFN only. | Eliminates direction-control logic but adds complexity in deterministic timing-critical paths; less flexible for synchronous bidirectional protocols. | Prefer for automatic level shifting in I²C/SPI where direction changes infrequently; avoid when DIR-driven control is required. |
Compared with SN74LVC245A and TXB0108, the SN74LVCR2245APW uniquely combines 5.5-V-tolerant inputs, integrated termination, and explicit DIR/OE control - delivering deterministic timing, reduced BOM, and full hot-swap safety in space-constrained industrial and computing interconnects.
Availability
SN74LVCR2245APW is available at Aetrix Electronics and suitable for industrial automation, server management, and wearable electronics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant TSSOP packaging.
Supply support for SN74LVCR2245APW 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 logic and interface solutions.
The SN74LVCR2245APW belongs to TI's LVCR logic family, engineered specifically for robust voltage translation and bus isolation in mixed-signal systems where interoperability, thermal resilience, and layout efficiency are critical design constraints.
FAQ
What is the maximum input voltage the SN74LVCR2245APW can tolerate?
The SN74LVCR2245APW 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 is explicitly specified in the Absolute Maximum Ratings table and enables direct connection to 5-V logic without external clamping or level-shifting components. The SN74LVCR2245APW maintains this rating across its full operating temperature range (–40°C to +125°C).
Does the SN74LVCR2245APW require external series resistors for EMI control?
No, the SN74LVCR2245APW does not require external series resistors because each output includes an integrated 26-Ω series resistor. This on-die termination reduces signal overshoot and undershoot, minimizes PCB routing reflections, and eliminates eight discrete components. The SN74LVCR2245APW's built-in resistance is optimized for use with standard 50-Ω transmission lines and matches TI's characterization load conditions in the switching specifications.
How does the Ioff feature protect the SN74LVCR2245APW during power-down?
The Ioff feature in the SN74LVCR2245APW disables all outputs and limits leakage current to ±10 µA when VCC = 0 V, even if valid signals (up to 5.5 V) remain present on A or B ports. This prevents damaging reverse current flow through the device during hot-swap, partial power-down, or mismatched power sequencing - a capability confirmed in the Electrical Characteristics table under Ioff test conditions. The SN74LVCR2245APW maintains this protection across its full –40°C to +125°C temperature range.
What is the propagation delay of the SN74LVCR2245APW at 3.3 V?
The SN74LVCR2245APW has a maximum propagation delay (tpd) of 6.3 ns at VCC = 3.3 V, TA = –40°C to +85°C, as specified in the Switching Characteristics table. At the extended temperature range (–40°C to +125°C), tpd increases to 7.3 ns under identical conditions. These values are measured with CL = 50 pF and VO = ±0.3 V, reflecting real-world loading in high-speed digital interconnects. The SN74LVCR2245APW achieves this performance using optimized CMOS driver stages without compromising drive strength or noise immunity.
Which package type does the SN74LVCR2245APW use, and what are its key mechanical properties?
The SN74LVCR2245APW uses the TSSOP-20 (PW) package with nominal dimensions of 6.50 mm × 4.40 mm and 0.65-mm lead pitch. It features gull-wing leads, NiPdAu surface finish, and MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH). The SN74LVCR2245APW's TSSOP package supports fine-pitch reflow assembly, provides superior thermal dissipation versus SSOP variants, and is compatible with standard automated optical inspection (AOI) and X-ray void detection processes.
SN74LVCR2245APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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-TSSOP
SN74LVCR2245APW FAQ
1.How can I place an order for SN74LVCR2245APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR2245APW 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 SN74LVCR2245APW reliable?
The price and inventory of SN74LVCR2245APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR2245APW is usually 5 days.
3.What payment methods are accepted for SN74LVCR2245APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCR2245APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCR2245APW?
SN74LVCR2245APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCR2245APW 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 SN74LVCR2245APW?
For technical support, including SN74LVCR2245APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR2245APW requirements.
6.How does Aetrix verify that SN74LVCR2245APW is sourced from the original manufacturer or authorized distributors?
All SN74LVCR2245APW 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 SN74LVCR2245APW meets industry standards.
7.What is the process for return or replacement of SN74LVCR2245APW?
All SN74LVCR2245APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR2245APW, 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 SN74LVCR2245APW part is unused and in its original packaging.
Return procedure for SN74LVCR2245APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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