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Texas Instruments SN74LVCR2245PWLE
- Part No.:
- SN74LVCR2245PWLE
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVCR2245PWLE.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
SN74LVCR2245PWLE from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 3.3-V and 5-V buses. It operates from 2.7 V to 3.6 V, supports mixed-mode signal operation (5-V inputs/outputs with 3.3-V VCC), delivers ±12 mA output drive at 3 V, and features <0.8 V typical ground bounce (VOLP) - used in voltage-level translation between legacy 5-V logic and modern 3.3-V systems.
For engineers reviewing the SN74LVCR2245PWLE datasheet, SN74LVCR2245PWLE pinout, SN74LVCR2245PWLE application, or SN74LVCR2245PWLE equivalent, key selection criteria include direction-control (DIR) and output-enable (OE) logic timing, 3-state isolation behavior during power sequencing, mixed-voltage I/O tolerance, and thermal performance in TSSOP-20 (PW) packaging.
Technical Context
The SN74LVCR2245PWLE implements a dual-bus, direction-controllable transceiver architecture with independent DIR and OE inputs. Its EPIC™ submicron CMOS process enables robust noise immunity, including <0.8 V typical VOLP and >2 V typical VOHV, while supporting simultaneous 3.3-V VCC operation with 5-V-tolerant I/Os.
It provides true 3-state isolation when OE is high, with propagation delay as low as 1.5 ns (min) and skew ≤1 ns between outputs. The device is characterized across –40°C to 85°C and meets JEDEC JESD-17 latch-up (>250 mA) and MIL-STD-883 ESD (>2000 V HBM) specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - ensures compatibility with standard 3.3-V supply rails and margin for brownout conditions. |
| I/O Voltage Tolerance | 0 V to 5.5 V - allows direct interfacing with 5-V TTL/CMOS devices without external level shifters. |
| Output Drive | ±12 mA at VCC = 3 V - sufficient to drive 50-pF loads at ≥10 MHz with clean edges. |
| Propagation Delay | 1.5–7.5 ns (VCC = 3.3 V) - enables high-speed bus handshaking in real-time control interfaces. |
| Power Dissipation Capacitance | 33 pF (enabled), 2 pF (disabled) - reduces dynamic power by >90% in 3-state standby mode. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and communications equipment. |
| ESD Rating | 2000 V HBM - exceeds MIL-STD-883 Method 3015, supporting robust handling in manufacturing. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 0.65 mm pitch, thermally enhanced for industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Low = B→A data flow; High = A→B data flow - determines real-time bus traffic direction. |
| 2–9 (A1–A8) | Port A I/O Terminals | Bidirectional 5-V-tolerant data lines tied to local 3.3-V subsystem (e.g., MCU bus). |
| 11 (OE) | Output Enable Input | Low = active transceiver; High = 3-state isolation - critical for hot-swap and power sequencing. |
| 12–19 (B1–B8) | Port B I/O Terminals | Bidirectional 5-V-tolerant data lines connected to legacy 5-V peripheral or backplane. |
| 10 (GND) | Ground Reference | Primary return path for all I/O and internal logic - must be low-inductance connection. |
| 20 (VCC) | Supply Voltage | 3.3-V core power only - no internal regulation; requires local 3.3-V LDO or DC/DC. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-Mode I/O | 5-V input/output tolerance with 3.3-V VCC eliminates external level translators in 3.3/5-V hybrid systems. |
| Low Ground Bounce | <0.8 V typical VOLP at 3.3 V/25°C - maintains signal integrity during simultaneous switching of all eight outputs. |
| Fast 3-State Enable/Disable | 1.5–9.5 ns ten/tdis - enables precise bus arbitration and prevents contention during state transitions. |
| Latch-Up Immunity | >250 mA per JEDEC JESD-17 - ensures reliability under transient overvoltage or ESD stress events. |
| Thermal Efficiency | 0.7 W max power dissipation in PW package - supports continuous operation in compact industrial enclosures. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Interfacing a 3.3-V microcontroller to legacy 5-V sensor bus in programmable logic controller racks. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator, controlled via DIR and OE signals synchronized to PLC scan cycle. Use Value: Eliminates discrete resistor-divider networks and reduces BOM count while maintaining <10 ns timing margins for deterministic I/O updates. |
Use Scenario: Connecting a 3.3-V body control unit (BCU) MCU to 5-V LIN transceivers and door module actuators. IC Role / Device Role / Timing Role: Level-shifting transceiver enabling bidirectional diagnostic messaging and actuator command relay. Use Value: Supports 19.2 kbps LIN protocol timing with guaranteed 3-state isolation during MCU reset sequences. |
| Medical Imaging Data Acquisition | Test & Measurement Equipment |
|
Use Scenario: Bridging a 3.3-V FPGA-based image processor to 5-V analog front-end ADC/DAC modules in portable ultrasound units. IC Role / Device Role / Timing Role: Synchronized data path transceiver with DIR-controlled burst transfers and OE-gated idle periods. Use Value: Maintains <1 ns inter-channel skew across all eight lanes, preserving pixel timing alignment in real-time beamforming. |
Use Scenario: Enabling flexible signal routing between 3.3-V digital pattern generators and 5-V DUT interfaces on automated test fixtures. IC Role / Device Role / Timing Role: Reconfigurable bus coupler allowing A↔B direction reversal and on-demand 3-state isolation for fixture safety interlocks. Use Value: Reduces fixture reconfiguration time by 70% versus manual jumper-based solutions, with verified 2000-V ESD protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWRE4 | Lower drive (±24 mA), no 5-V-tolerant inputs - requires external clamping for 5-V signals. | Best suited for pure 3.3-V systems; not rated for mixed-voltage operation. | Select when interfacing only 3.3-V peripherals and lower cost is prioritized over voltage flexibility. |
| 74ALVC164245TTR | 16-bit, dual-supply (VCCA/VCCB), higher speed (tpd = 2.5 ns typ), but larger TSSOP-48 package. | Designed for wide-data-path applications like memory expansion; over-engineered for 8-bit point-to-point links. | Choose only when scaling to 16-bit buses or requiring independent 3.3-V/5-V supply domains. |
Compared with SN74LVC245APWRE4 and 74ALVC164245TTR, the SN74LVCR2245PWLE uniquely balances 5-V I/O tolerance, 8-bit width, TSSOP-20 footprint, and industrial temperature range - making it optimal for space-constrained mixed-voltage bridging where pin count and voltage flexibility are co-critical.
Availability
SN74LVCR2245PWLE is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, medical imaging subsystems, and test equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SN74LVCR2245PWLE 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 industrial and automotive IC design.
The SN74LVCR2245PWLE belongs to TI's LVCR logic family, engineered specifically for robust voltage-level translation in mixed-signal industrial systems where reliability, ESD resilience, and precise timing control are mandatory.
FAQ
What is the maximum input voltage the SN74LVCR2245PWLE can tolerate on its I/O pins?
The SN74LVCR2245PWLE supports input voltages up to 5.5 V on all A and B port pins, regardless of VCC being 3.3 V - enabling safe interfacing with 5-V TTL and CMOS logic without external protection circuitry. This 5-V tolerance is explicitly specified in the recommended operating conditions table and confirmed across all temperature ranges.
How does the SN74LVCR2245PWLE handle power-up sequencing to avoid bus contention?
The SN74LVCR2245PWLE enters a high-impedance state when OE is high; to ensure isolation during power-up, TI recommends tying OE to VCC via a pullup resistor. The SN74LVCR2245PWLE's internal design guarantees that outputs remain in 3-state until VCC stabilizes and OE is actively driven low - preventing glitches or contention on either bus.
Can the SN74LVCR2245PWLE be used in a 2.5-V system?
No - the SN74LVCR2245PWLE is specified for 2.7 V to 3.6 V VCC operation only. At 2.5 V, VIH/VIL thresholds and output drive capability fall outside guaranteed limits per the datasheet's recommended operating conditions. Using the SN74LVCR2245PWLE below 2.7 V risks metastability, excessive propagation delay, or failure to meet 3.3-V logic thresholds.
What is the thermal resistance (θJA) of the SN74LVCR2245PWLE in the PW package?
The SN74LVCR2245PWLE in the TSSOP-20 (PW) package has a typical junction-to-ambient thermal resistance (θJA) of 110°C/W under standard JEDEC PCB conditions (2-layer board, 1-in² copper). This value is derived from TI's Package Thermal Considerations application note and aligns with the 0.7 W maximum power dissipation rating at TA = 55°C.
Does the SN74LVCR2245PWLE support hot-swap insertion into a live 5-V bus?
Yes - the SN74LVCR2245PWLE's 5-V-tolerant I/Os, combined with its guaranteed 3-state behavior when OE is high, allow safe hot-swap insertion into a powered 5-V bus. TI specifies that unused inputs must be held high or low, and OE should be pulled high until VCC is stable - ensuring the SN74LVCR2245PWLE remains isolated until fully powered and configured.
SN74LVCR2245PWLE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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:
- 2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVCR2245PWLE FAQ
1.How can I place an order for SN74LVCR2245PWLE through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR2245PWLE 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 SN74LVCR2245PWLE reliable?
The price and inventory of SN74LVCR2245PWLE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR2245PWLE is usually 5 days.
3.What payment methods are accepted for SN74LVCR2245PWLE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCR2245PWLE transactions.
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4.How is shipping managed for SN74LVCR2245PWLE?
SN74LVCR2245PWLE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCR2245PWLE 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 SN74LVCR2245PWLE?
For technical support, including SN74LVCR2245PWLE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR2245PWLE requirements.
6.How does Aetrix verify that SN74LVCR2245PWLE is sourced from the original manufacturer or authorized distributors?
All SN74LVCR2245PWLE 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 SN74LVCR2245PWLE meets industry standards.
7.What is the process for return or replacement of SN74LVCR2245PWLE?
All SN74LVCR2245PWLE units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR2245PWLE, 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 SN74LVCR2245PWLE part is unused and in its original packaging.
Return procedure for SN74LVCR2245PWLE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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