My Inquiry
My Account
Texas Instruments SN74LVCR2245APWR
- Part No.:
- SN74LVCR2245APWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVCR2245APWR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,863
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVCR2245APWR from Texas Instruments is an octal noninverting bus transceiver with 3-state outputs, designed for bidirectional data flow 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, delivers 6.3 ns max propagation delay at 3.3 V, and enables live insertion via Ioff protection - used in server backplanes and network switch interconnects.
For engineers reviewing the SN74LVCR2245APWR datasheet, SN74LVCR2245APWR pinout, SN74LVCR2245APWR application, or SN74LVCR2245APWR equivalent, key selection criteria include voltage translation capability (3.3-V core / 5-V interface), guaranteed 125°C operation, Ioff-enabled partial power-down, and TSSOP-20 package compatibility with high-density PCB layouts.
Technical Context
This device implements asynchronous bidirectional data transfer using a single DIR control line to select A→B or B→A direction, while OE independently enables/disables all outputs into high-impedance state. Its CMOS input structure accepts voltages up to 5.5 V regardless of VCC (1.65–3.6 V), enabling robust level-shifting without external components.
The integrated 26-Ω series output resistors suppress overshoot/undershoot without requiring external termination, and the Ioff circuit actively blocks current flow when VCC = 0 V - critical for hot-swap and partial-power-down systems where bus isolation must be maintained during supply sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports dual-supply systems and low-power embedded rails |
| Input Voltage Tolerance | Up to 5.5 V - enables direct interfacing with legacy 5-V logic without level shifters |
| Max tpd | 6.3 ns at 3.3 V - ensures timing compliance in high-speed 33-MHz bus applications |
| Output Drive | ±12 mA per channel - sufficient to drive 50-Ω transmission lines or multiple CMOS loads |
| Ioff Current | ±10 μA at 5.5 V - prevents back-drive damage during power sequencing or hot-plug events |
| Operating Temp | –40°C to 125°C - qualified for industrial and telecom infrastructure environments |
| ESD Rating | 2000-V HBM - meets JEDEC JESD22-A114 reliability requirements |
Pinout & Package
TSSOP-20 package (6.50 mm × 4.40 mm body size), lead-free with NiPdAu finish, moisture sensitivity level 1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | High = A→B data flow; Low = B→A data flow - determines signal path polarity |
| 2–9, 11–18 (A1–A8, B1–B8) | Bidirectional I/O channels | Octal bus ports with 5.5-V-tolerant inputs and 26-Ω series output resistance |
| 10 (GND) | Ground reference | Common return for all signals and internal logic - must be low-impedance connection |
| 19 (OE) | Output enable input | Low = outputs active; High = all outputs in high-Z - enables bus isolation |
| 20 (VCC) | Power supply | 1.65–3.6-V core supply - requires local 0.1-μF bypass capacitor per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-voltage interface | 5.5-V-tolerant inputs operate reliably with 3.3-V VCC - eliminates external level translators in 3.3/5-V hybrid systems |
| Integrated output termination | 26-Ω series resistors on all outputs reduce ringing and EMI without discrete components - simplifies layout and lowers BOM count |
| Ioff partial-power-down | Blocks current flow when VCC = 0 V - protects powered-down devices from back-driving by live buses during hot-swap or fault conditions |
| Wide temperature range | Specified from –40°C to 125°C - suitable for uncooled telecom line cards and industrial control cabinets |
| Low ground bounce | Typical VOLP < 0.8 V at 3.3 V - maintains signal integrity during simultaneous switching of all eight outputs |
Applications
| Server Backplane Interconnect | Network Switch Control Plane |
|---|---|
Use Scenario: Bidirectional communication between baseboard management controller (BMC) and hot-swap module controllers across a 3.3-V backplane. IC Role / Device Role / Timing Role: Level-translating bus transceiver enabling BMC-side 3.3-V logic to interface with 5-V legacy modules. Use Value: Eliminates need for discrete level shifters while maintaining timing margin via 6.3 ns tpd and Ioff isolation during module insertion/removal. | Use Scenario: Isolating CPU-side configuration buses from line card ASICs operating at different supply voltages. IC Role / Device Role / Timing Role: Direction-controlled data bridge with OE-gated high-Z state for dynamic bus arbitration. Use Value: Prevents bus contention during firmware updates and supports live reconfiguration without system reset. |
| Industrial PLC I/O Expansion | Test Equipment Signal Routing |
Use Scenario: Extending microcontroller GPIOs to drive isolated digital I/O modules in harsh factory environments. IC Role / Device Role / Timing Role: Robust octal buffer with 125°C rating and 5.5-V input tolerance for noisy 24-V fieldbus interfaces. Use Value: Survives wide ambient temperature swings and withstands transient overvoltages common in industrial settings. | Use Scenario: Reconfigurable signal path routing between DUT interface connectors and measurement ASICs in automated test systems. IC Role / Device Role / Timing Role: Low-skew, high-Z-capable bus switch enabling flexible test fixture topology changes. Use Value: Maintains signal fidelity (<0.8 V ground bounce) during high-speed pattern generation and reduces test setup complexity. |
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 + 0.3 V; lacks integrated 26-Ω resistors | Requires external termination and level-shifting circuitry for 5-V interface use | Select when cost is primary and system operates exclusively at matched VCC levels |
| SN74AVC245 | Wider VCC range (1.2–3.6 V); higher speed (4.2 ns tpd); no Ioff support | Not suitable for hot-swap or partial-power-down scenarios requiring back-drive protection | Select for ultra-low-voltage portable designs where Ioff is not required |
Compared with SN74LVC245A and SN74AVC245, the SN74LVCR2245APWR uniquely combines 5.5-V input tolerance, integrated output resistors, and Ioff - making it the only choice for robust, translator-free interconnect in mixed-voltage, hot-pluggable systems.
Availability
SN74LVCR2245APWR is available at Aetrix Electronics and suitable for server backplane interconnect, network switch control plane isolation, and industrial PLC I/O expansion requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for SN74LVCR2245APWR 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 specializing in analog and embedded processing technologies, with leadership in interface, power management, and signal chain solutions.
The SN74LVCR2245APWR belongs to TI's LVC logic family, engineered for high-speed, low-voltage bidirectional bus interfacing in mixed-signal systems requiring voltage translation, hot-swap capability, and EMI reduction.
FAQ
What is the maximum input voltage the SN74LVCR2245APWR can tolerate?
The SN74LVCR2245APWR accepts input voltages up to 5.5 V regardless of VCC level (1.65–3.6 V), enabling direct connection to 5-V logic families without external level-shifting components. This specification is verified across the full operating temperature range (–40°C to 125°C) and is explicitly defined in the Absolute Maximum Ratings table of the official datasheet.
Does the SN74LVCR2245APWR support hot-swap applications?
Yes, the SN74LVCR2245APWR supports hot-swap applications through its Ioff feature, which disables outputs and blocks current backflow when VCC = 0 V. This prevents damage to powered-down devices connected to live buses - a requirement confirmed in TI's Detailed Description section and validated by JESD78 latch-up testing (>250 mA).
What is the purpose of the integrated 26-Ω resistors in the SN74LVCR2245APWR?
The integrated 26-Ω series resistors on all outputs of the SN74LVCR2245APWR suppress signal overshoot and undershoot, reducing EMI and improving signal integrity without requiring external termination components. This design feature is specified in the Features section and confirmed by typical VOLP < 0.8 V and VOHV > 2 V measurements at 3.3 V.
Can the SN74LVCR2245APWR operate at 125°C ambient temperature?
Yes, the SN74LVCR2245APWR is fully specified for operation from –40°C to 125°C ambient temperature, with switching characteristics (tpd, ten, tdis) and DC parameters validated across this range. This qualification is documented in Sections 7.6 and 7.7 of the datasheet and supported by thermal metrics including RθJA = 102.5°C/W for the PW package.
How does the DIR pin control data direction in the SN74LVCR2245APWR?
The DIR pin on the SN74LVCR2245APWR selects data flow direction: logic high enables A→B transmission, while logic low enables B→A transmission. This function is defined in the Device Functional Modes table (Table 2) and implemented via internal logic that routes signals accordingly - independent of OE state, which only controls output enable/disable.
SN74LVCR2245APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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-TSSOP
SN74LVCR2245APWR FAQ
1.How can I place an order for SN74LVCR2245APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR2245APWR 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 SN74LVCR2245APWR reliable?
The price and inventory of SN74LVCR2245APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR2245APWR is usually 5 days.
3.What payment methods are accepted for SN74LVCR2245APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCR2245APWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCR2245APWR?
SN74LVCR2245APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCR2245APWR 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 SN74LVCR2245APWR?
For technical support, including SN74LVCR2245APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR2245APWR requirements.
6.How does Aetrix verify that SN74LVCR2245APWR is sourced from the original manufacturer or authorized distributors?
All SN74LVCR2245APWR 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 SN74LVCR2245APWR meets industry standards.
7.What is the process for return or replacement of SN74LVCR2245APWR?
All SN74LVCR2245APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR2245APWR, 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 SN74LVCR2245APWR part is unused and in its original packaging.
Return procedure for SN74LVCR2245APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVCR2245APWR 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…
