My Inquiry
My Account
Texas Instruments SN74LVCR2245APWE4
- Part No.:
- SN74LVCR2245APWE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVCR2245APWE4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVCR2245APWE4 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, 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 control planes.
For engineers reviewing the SN74LVCR2245APWE4 datasheet, SN74LVCR2245APWE4 pinout, SN74LVCR2245APWE4 application, or SN74LVCR2245APWE4 equivalent, key selection criteria include voltage translation capability (1.65–3.6 V core / 5.5 V inputs), guaranteed 125°C operation, Ioff-enabled partial-power-down isolation, and TSSOP-20 package compatibility with high-density PCB layouts.
Technical Context
The SN74LVCR2245APWE4 implements a dual-bus directional control architecture using DIR and OE inputs: DIR selects A→B or B→A data flow, while OE places all eight channels into high-impedance state. Its CMOS design ensures balanced drive strength (±12 mA per output) and low ground bounce (<0.8 V typical VOLP at 3.3 V).
It integrates on-die 26-Ω series termination on all outputs to suppress overshoot/undershoot without external resistors, and its Ioff circuitry blocks current flow when VCC = 0 V-enabling safe hot-plug operation in modular systems with staggered power sequencing.
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 |
| Input Voltage Tolerance | Up to 5.5 V - Allows connection to legacy 5-V peripherals without level-shifting circuitry |
| 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 |
| Ioff Current | ±10 μA at VI/VO = 5.5 V - Prevents back-drive damage during partial power-down sequences |
| Operating Temperature | –40°C to +125°C - Qualified for industrial and extended-temperature embedded control environments |
| ESD Rating | 2000-V HBM, 1000-V CDM - Meets JEDEC JESD22-A114 and JESD22-C101 requirements |
Pinout & Package
TSSOP-20 package (6.50 mm × 4.40 mm body size), lead-free with NiPdAu finish, MSL Level-1 (unlimited floor life), compatible with standard reflow profiles.
| 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 |
| 2–9 (A1–A8) | Port A bidirectional I/O | Connects to source bus; tolerates 5.5-V inputs regardless of VCC |
| 10 (GND) | Ground reference | Primary return path for all internal logic and output currents |
| 11–18 (B1–B8) | Port B bidirectional I/O | Connects to destination bus; shares same voltage tolerance and drive specs as A-port |
| 19 (OE) | Output enable input | Active-low: Low enables transceiver; High forces all outputs to high-impedance state |
| 20 (VCC) | Power supply | Single supply pin for entire device; requires local 0.1-μF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω output series resistors | Eliminates need for external termination components, reducing BOM count and PCB area |
| Mixed-voltage interface support | Enables seamless interoperation between 3.3-V system logic and 5-V legacy peripherals |
| Ioff partial-power-down protection | Prevents damaging current backflow when VCC is off but I/O pins remain active |
| Low ground bounce (VOLP < 0.8 V) | Minimizes noise coupling into shared ground planes in multi-channel digital systems |
| 125°C maximum operating temperature | Supports deployment in thermally constrained environments such as enclosed server chassis |
Applications
| Server Backplane Interfacing | Network Switch Control Plane |
|---|---|
Use Scenario: Bidirectional communication between CPU module and hot-swap I/O mezzanine cards in 1U rack servers. IC Role / Device Role / Timing Role: Bus transceiver enabling isolated, direction-controlled data exchange between 3.3-V processor subsystem and 5-V peripheral modules. Use Value: Ioff protection prevents back-drive damage during card insertion/removal; 26-Ω series resistors suppress signal reflections on 10-cm backplane traces. | Use Scenario: Level translation between 1.8-V FPGA configuration logic and 3.3-V PHY management interfaces in enterprise switches. IC Role / Device Role / Timing Role: Voltage-tolerant octal transceiver providing glitch-free handshaking signals across mixed-supply domains. Use Value: 5.5-V input tolerance eliminates external level shifters; 6.3 ns tpd ensures setup/hold timing margins for 100-MHz control clocks. |
| Industrial PLC I/O Expansion | Test Equipment Signal Routing |
Use Scenario: Isolating fieldbus controller from modular analog/digital I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Directionally configurable bus buffer managing command/response traffic between main controller and expansion racks. Use Value: DIR/OE dual-control allows dynamic bus arbitration; –40°C to 125°C rating ensures reliability in uncooled control cabinets. | Use Scenario: Reconfigurable signal path switching in automated test equipment (ATE) for DUT interface adaptation. IC Role / Device Role / Timing Role: Low-latency bidirectional data conduit between pattern generator and DUT under test. Use Value: Guaranteed 125°C operation supports high-power burn-in testing; 26-Ω outputs reduce edge ringing on 50-Ω coaxial interconnects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2245APW | Lacks 5.5-V input tolerance; max VI = VCC + 0.3 V | Restricted to single-supply 3.3-V systems without legacy 5-V interface needs | Select when cost sensitivity outweighs mixed-voltage flexibility and Ioff is not required |
| SN74AVC2245PW | Lower VCC range (1.2–3.6 V); higher speed (4.2 ns tpd at 3.3 V); no integrated 26-Ω resistors | Better suited for ultra-low-voltage SoC interconnects where external termination is acceptable | Choose for sub-1.8-V designs or when tighter timing budgets demand faster propagation |
Compared with SN74LVC2245APW and SN74AVC2245PW, the SN74LVCR2245APWE4 uniquely combines 5.5-V input tolerance, integrated termination, and Ioff in a single TSSOP-20 package-making it optimal for robust, mixed-supply industrial and telecom infrastructure where layout simplicity and power sequencing resilience are critical.
Availability
SN74LVCR2245APWE4 is available at Aetrix Electronics and suitable for server backplane interfacing, network switch control plane design, and industrial PLC I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVCR2245APWE4 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 solutions, with leadership in interface, power management, and signal chain technologies.
The SN74LVCR2245APWE4 belongs to TI's LVC logic family, engineered for robust voltage translation and bus isolation in industrial, networking, and computing systems demanding mixed-supply interoperability and high-reliability operation.
FAQ
What is the maximum input voltage the SN74LVCR2245APWE4 can tolerate?
The SN74LVCR2245APWE4 accepts input voltages up to 5.5 V on all A- and B-port pins, independent of VCC level-enabling direct interfacing with 5-V logic while operating from 1.65–3.6 V supplies. This overvoltage tolerance is explicitly specified in the Absolute Maximum Ratings table and confirmed across all temperature ranges in the Recommended Operating Conditions section.
Does the SN74LVCR2245APWE4 require external series resistors for signal integrity?
No, the SN74LVCR2245APWE4 does not require external series resistors. All outputs integrate equivalent 26-Ω series resistors to dampen signal reflections and reduce overshoot/undershoot-verified by typical VOLP < 0.8 V and VOHV > 2 V measurements at 3.3 V and 25°C. This feature eliminates two external components per channel in point-to-point routing.
How does the Ioff feature protect the SN74LVCR2245APWE4 during hot-plug events?
The Ioff feature in the SN74LVCR2245APWE4 disables all outputs and blocks current flow when VCC = 0 V, limiting Ioff current to ±10 μA even with 5.5-V signals applied to I/O pins. This prevents damaging back-drive current from powered buses into unpowered sections-critical for safe insertion/removal of modules in live-backplane systems.
What is the propagation delay of the SN74LVCR2245APWE4 at 3.3 V?
The SN74LVCR2245APWE4 has a maximum propagation delay (tpd) of 6.3 ns at VCC = 3.3 V, TA = –40°C to 85°C, measured under standard load conditions (CL = 50 pF, ΔV = ±0.3 V). This value is guaranteed across the full industrial temperature range and confirmed in both Switching Characteristics tables (Sections 7.6 and 7.7).
Which package variant does SN74LVCR2245APWE4 use, and what are its key mechanical properties?
The SN74LVCR2245APWE4 uses the TSSOP-20 (PW) package: 6.50 mm × 4.40 mm body size, 1.2-mm height, 0.65-mm lead pitch. It features NiPdAu lead finish, MSL Level-1 rating (unlimited floor life), and RoHS-compliant construction-validated in TI's Package Option Addendum and Mechanical Drawings documentation.
SN74LVCR2245APWE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCR
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
SN74LVCR2245APWE4 FAQ
1.How can I place an order for SN74LVCR2245APWE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCR2245APWE4 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 SN74LVCR2245APWE4 reliable?
The price and inventory of SN74LVCR2245APWE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR2245APWE4 is usually 5 days.
3.What payment methods are accepted for SN74LVCR2245APWE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCR2245APWE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCR2245APWE4?
SN74LVCR2245APWE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCR2245APWE4 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 SN74LVCR2245APWE4?
For technical support, including SN74LVCR2245APWE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR2245APWE4 requirements.
6.How does Aetrix verify that SN74LVCR2245APWE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVCR2245APWE4 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 SN74LVCR2245APWE4 meets industry standards.
7.What is the process for return or replacement of SN74LVCR2245APWE4?
All SN74LVCR2245APWE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR2245APWE4, 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 SN74LVCR2245APWE4 part is unused and in its original packaging.
Return procedure for SN74LVCR2245APWE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVCR2245APWE4 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…
