My Inquiry
My Account
Texas Instruments SN74LVCR2245ADBR
- Part No.:
- SN74LVCR2245ADBR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVCR2245ADBR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,714
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVCR2245ADBR 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 low-voltage FPGA I/O bridging.
For engineers reviewing the SN74LVCR2245ADBR datasheet, SN74LVCR2245ADBR pinout, SN74LVCR2245ADBR application, or SN74LVCR2245ADBR equivalent, key selection criteria include its Ioff-enabled live insertion capability, ±12 mA output drive per channel, 1.65–3.6 V supply range, and SSOP-20 package compatibility with space-constrained PCB layouts.
Technical Context
The SN74LVCR2245ADBR implements a dual-bus directional control architecture using DIR to select A→B or B→A data flow and OE to place all outputs in high-impedance state. Its Ioff circuitry ensures zero current backflow when VCC = 0 V, supporting partial-power-down systems.
All eight A-side and eight B-side I/Os are individually bidirectional, with input voltage tolerance up to 5.5 V independent of VCC, and built-in 26-Ω series termination eliminating external resistors. Propagation delay remains stable across –40°C to 125°C and 1.65–3.6 V VCC.
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 legacy peripherals while powered from 3.3-V rails. |
| Max tpd | 6.3 ns at 3.3 V - supports >100 MHz data rates in point-to-point bus applications. |
| Output Drive | ±12 mA per channel - sufficient to drive 50-Ω transmission lines or multiple CMOS loads without buffering. |
| Ioff Current | ±10 μA at 5.5 V - guarantees isolation during hot-swap or power sequencing in modular systems. |
| Operating Temperature | –40°C to 125°C - qualified for under-hood automotive, industrial control, and telecom infrastructure environments. |
Pinout & Package
SN74LVCR2245ADBR uses the SSOP-20 (DB) package with 8.65 mm × 3.90 mm body size and 0.65 mm lead pitch. The package is RoHS-compliant, moisture sensitivity level 1 (unlimited floor life), and rated for reflow up to 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | High = A→B data flow; Low = B→A data flow - enables dynamic bus reversal without reset. |
| 2–9 (A1–A8) | Bidirectional A-Side I/O | Connect to local processor or controller bus; tolerate 0–5.5 V regardless of VCC. |
| 10 (GND) | Ground Reference | Primary return path for all I/O and internal logic; must be low-inductance connection. |
| 11–18 (B1–B8) | Bidirectional B-Side I/O | Interface to peripheral, memory, or FPGA bank; matched impedance reduces signal integrity issues. |
| 19 (OE) | Output Enable Input | Active-Low - drives all A/B outputs to high-Z when high; tie to VCC via pullup for power-up safety. |
| 20 (VCC) | Power Supply | Single 1.65–3.6 V rail; requires local 0.1-μF ceramic bypass capacitor placed ≤2 mm from pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω Series Resistors | Eliminates need for 16 external termination resistors - reduces BOM count and PCB area in dense routing. |
| Mixed-Mode Signal Operation | 5.5-V-tolerant inputs on 1.65–3.6-V VCC - enables seamless interconnection between 3.3-V SoCs and 5-V sensors/actuators. |
| Ioff Partial-Power-Down Support | Prevents back-drive current when VCC = 0 V - essential for hot-plug modules and redundant power architectures. |
| Low Ground Bounce (VOLP) | <0.8 V at 3.3 V - minimizes noise coupling into adjacent analog or RF sections during switching. |
| ESD Robustness | 2000-V HBM / 1000-V CDM - exceeds JEDEC standards for manufacturing handling and field reliability. |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Isolating and translating signals between a 3.3-V main controller and legacy 5-V I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional voltage-level translator and bus isolator with direction control synchronized to data phase. Use Value: Enables drop-in replacement of obsolete 5-V transceivers without redesigning power delivery or layout. |
Use Scenario: Extending the number of available I/O pins on a Xilinx Artix-7 FPGA by connecting additional peripheral banks. IC Role / Device Role / Timing Role: High-speed octal buffer with controlled slew and on-die termination for clean signal integrity. Use Value: Reduces timing skew across 8-bit data paths and eliminates external series resistors, saving 16 components per device. |
| Wearable Health Sensor Hub | Network Switch Management Bus |
|
Use Scenario: Aggregating sensor data from multiple 5-V analog front-ends (ECG, SpO₂) into a 1.8-V microcontroller subsystem. IC Role / Device Role / Timing Role: Low-voltage bidirectional data bridge with Ioff protection during battery-swapping events. Use Value: Maintains system safety during live insertion of sensor modules while operating from single-cell Li-ion supply. |
Use Scenario: Interfacing a 3.3-V management MCU to 5-V PHY registers and status LEDs in enterprise Ethernet switches. IC Role / Device Role / Timing Role: Isolated control-path transceiver with fast enable/disable for register read/write bursts. Use Value: Achieves sub-10 ns propagation delay and <1 ns skew across all 8 control lines, ensuring deterministic register access timing. |
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 integrated 26-Ω series resistors; 5.5-V input tolerance retained; slightly higher tpd (7.5 ns @ 3.3 V). | Lacks built-in termination - requires external resistors for clean signal integrity in high-speed traces. | Choose when cost optimization outweighs layout simplification and signal integrity benefits. |
| SN74AVC245 | Lower VCC range (1.2–3.6 V); higher speed (4.2 ns @ 3.3 V); no 5.5-V input tolerance - max VI = VCC + 0.3 V. | Not suitable for mixed 3.3-V/5-V systems; requires strict voltage domain separation. | Choose only for pure 1.2–3.3-V designs where maximum speed and lowest power are critical. |
Compared with SN74LVC245A and SN74AVC245, the SN74LVCR2245ADBR uniquely combines 5.5-V input tolerance, integrated 26-Ω termination, and Ioff - making it the only option that simultaneously solves level translation, signal integrity, and hot-swap safety in one device.
Availability
SN74LVCR2245ADBR is available at Aetrix Electronics and suitable for industrial backplane interface, FPGA I/O expansion, wearable health sensor hub, and network switch management bus applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVCR2245ADBR 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 SN74LVCR2245ADBR belongs to TI's LVCR (Low-Voltage CMOS with Resistor) logic family, engineered specifically for robust mixed-voltage system interfacing with integrated signal conditioning and power-aware features.
FAQ
What is the maximum input voltage the SN74LVCR2245ADBR can tolerate?
The SN74LVCR2245ADBR accepts input voltages up to 5.5 V on all A- and B-side pins, regardless of VCC value (1.65–3.6 V). This overvoltage tolerance is explicitly specified in the Absolute Maximum Ratings table and enables safe interfacing with 5-V peripherals while operating from lower supply rails - a key feature confirmed in Section 7.1 and Feature Description.
Does the SN74LVCR2245ADBR require external series resistors for signal integrity?
No. The SN74LVCR2245ADBR integrates 26-Ω series resistors on all outputs, as stated in the Features section and Electrical Characteristics table. This eliminates the need for 16 discrete resistors in typical 8-bit bus applications, reducing PCB area, BOM cost, and potential impedance mismatches caused by layout parasitics.
What is the purpose of the Ioff specification for the SN74LVCR2245ADBR?
The Ioff specification (±10 μA max at 5.5 V) ensures that no damaging current flows into or out of the SN74LVCR2245ADBR when VCC = 0 V. This enables safe live insertion and partial-power-down operation - critical for modular systems like hot-swappable cards or battery-backed subsystems where power domains may be sequenced independently.
Can the SN74LVCR2245ADBR operate at 1.65 V and still meet timing specifications?
Yes. The SN74LVCR2245ADBR is fully characterized down to 1.65 V, with guaranteed max tpd of 12.4 ns (–40°C to 125°C) and 10.9 ns (–40°C to 85°C) at this minimum supply. These values are documented in Tables 7.6 and 7.7, confirming reliable operation across the full 1.65–3.6 V range without derating.
What package type does the SN74LVCR2245ADBR use, and what are its key mechanical attributes?
The SN74LVCR2245ADBR uses the SSOP-20 (DB) package with nominal dimensions of 8.65 mm × 3.90 mm and 0.65 mm lead pitch. It has moisture sensitivity level 1 (unlimited floor life) and is rated for peak reflow at 260°C - verified in the Package Option Addendum and Mechanical Information sections of the datasheet.
SN74LVCR2245ADBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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-SSOP
SN74LVCR2245ADBR FAQ
1.How can I place an order for SN74LVCR2245ADBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR2245ADBR 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 SN74LVCR2245ADBR reliable?
The price and inventory of SN74LVCR2245ADBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR2245ADBR is usually 5 days.
3.What payment methods are accepted for SN74LVCR2245ADBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCR2245ADBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCR2245ADBR?
SN74LVCR2245ADBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCR2245ADBR 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 SN74LVCR2245ADBR?
For technical support, including SN74LVCR2245ADBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR2245ADBR requirements.
6.How does Aetrix verify that SN74LVCR2245ADBR is sourced from the original manufacturer or authorized distributors?
All SN74LVCR2245ADBR 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 SN74LVCR2245ADBR meets industry standards.
7.What is the process for return or replacement of SN74LVCR2245ADBR?
All SN74LVCR2245ADBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR2245ADBR, 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 SN74LVCR2245ADBR part is unused and in its original packaging.
Return procedure for SN74LVCR2245ADBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVCR2245ADBR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
