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Texas Instruments SN74AVC4T245PWR
- Part No.:
- SN74AVC4T245PWR
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AVC4T245PWR.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,690
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Product details
Overview
SN74AVC4T245 from Texas Instruments is a 4-bit dual-supply noninverting bus transceiver enabling bidirectional voltage-level translation between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains. It features independent VCCA (1.2–3.6V) and VCCB (1.2–3.6V) rails, 4.6V I/O tolerance, Ioff partial-power-down support, and up to 380Mbps data rate (1.8V→3.3V). It is used in low-voltage interconnects between SoCs and peripherals in portable electronics.
For engineers reviewing the SN74AVC4T245 datasheet, SN74AVC4T245 pinout, SN74AVC4T245 application, or SN74AVC4T245 equivalent, key selection criteria include dual-rail configurability, 3-state output control per channel, VCCA-referenced DIR/OE inputs, Ioff-enabled isolation during power sequencing, and verified 380Mbps performance at 1.8V-to-3.3V translation.
Technical Context
The SN74AVC4T245 implements two independent 2-bit bidirectional channels, each with dedicated DIR and OE controls referenced to VCCA. Its dual-rail architecture decouples A-port (VCCA-tracked) and B-port (VCCB-tracked) logic thresholds, enabling asymmetric voltage translation without external level-shifting components.
Each channel operates in three functional states: A→B transmission (DIR=H, OE=L), B→A transmission (DIR=L, OE=L), or full high-impedance isolation (OE=H). The Ioff circuit disables outputs when either VCCA or VCCB is at GND, preventing backflow current during partial power-down - a requirement for modern low-power system architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V - enables translation across all common low-voltage nodes (1.2V/1.5V/1.8V/2.5V/3.3V) without rail constraints |
| Max Data Rate | 380Mbps (1.8V→3.3V) - supports high-speed interfaces like SDIO, eMMC, and low-voltage parallel buses |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with legacy 3.3V or 5V systems without external clamping |
| Ioff Current | ±1μA max - ensures negligible leakage during partial power-down, critical for battery-powered device sleep modes |
| ESD Protection | 8kV HBM - meets industrial-grade robustness requirements for handheld and embedded applications |
| Propagation Delay | 2.6ns typical (3.3V→3.3V) - maintains signal integrity in timing-critical synchronous data paths |
| Operating Temp | –40°C to +85°C - qualified for extended industrial temperature operation |
Pinout & Package
TSSOP-16 (PW) package: 5mm × 6.4mm body, 0.65mm pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction-control input (per channel) | Referenced to VCCA; determines data flow direction (A→B or B→A) for respective 2-bit section |
| 1OE, 2OE | Output-enable input (per channel) | Referenced to VCCA; high = 3-state on associated port outputs; required for safe power-up sequencing |
| 1A1–2A2 | A-port I/O (4 pins) | Referenced to VCCA; connect to 1.2–3.6V source-side logic (e.g., processor GPIO) |
| 1B1–2B2 | B-port I/O (4 pins) | Referenced to VCCB; connect to 1.2–3.6V sink-side logic (e.g., sensor, memory, PMIC) |
| VCCA, VCCB | Independent supply rails | VCCA powers A-port I/Os and all control inputs; VCCB powers B-port I/Os only - enables true dual-voltage operation |
| GND | Ground reference | Two dedicated ground pins (pins 8 & 9) minimize ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent VCCA/VCCB supplies allow simultaneous operation at mismatched voltages (e.g., 1.2V MCU ↔ 3.3V display interface) |
| Per-channel 3-state control | Separate 1OE/2OE inputs enable selective isolation of each 2-bit channel - reduces bus contention in multi-peripheral systems |
| VCCA-referenced control logic | DIR/OE thresholds track VCCA, eliminating need for external level shifters on control lines - simplifies PCB routing and BOM |
| Ioff-enabled power sequencing | Automatic output disable when VCCA or VCCB = 0V prevents backdrive current - eliminates risk of damaging powered-down subsystems |
| 4.6V-tolerant I/Os | Supports hot-plug and mixed-voltage debugging without external protection diodes - lowers system-level component count |
Applications
| Mobile Processor Interfacing | Industrial Sensor Hub |
|---|---|
Use Scenario: Connecting a 1.2V application processor to a 3.3V camera module over parallel MIPI C-PHY or custom LVDS-like bus. IC Role / Device Role / Timing Role: Bidirectional level translator managing clocked data and control signals with sub-3ns propagation delay. Use Value: Enables direct interface without external voltage translators or level-shifter ICs, reducing board area and power consumption by 30% vs discrete solutions. | Use Scenario: Aggregating multiple 1.8V I²C sensors (temperature, humidity, pressure) into a 2.5V microcontroller-based edge node. IC Role / Device Role / Timing Role: Voltage-translating I/O buffer with per-port 3-state control to prevent bus lockup during sensor initialization. Use Value: Supports hot-swap of sensor modules while maintaining I²C bus integrity - eliminates system reset requirement during field maintenance. |
| Automotive Infotainment Display | Enterprise SSD Controller Interface |
Use Scenario: Bridging a 1.5V automotive SoC to a 3.3V TFT-LCD timing controller using 8-bit parallel RGB interface. IC Role / Device Role / Timing Role: High-speed bidirectional transceiver with Ioff protection during ignition-cycle power ramping. Use Value: Prevents backfeed from display power domain into SoC during cold cranking (VCCA dropouts), meeting ISO 16750-2 transient immunity requirements. | Use Scenario: Interfacing a 1.8V NVMe controller to 3.3V PCIe switch or flash memory buffer in enterprise SSD modules. IC Role / Device Role / Timing Role: Low-skew, high-bandwidth data path translator supporting 380Mbps burst transfers. Use Value: Achieves full PCIe Gen3-equivalent throughput without signal degradation - validated at 3.3V B-port loading with 15pF trace capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4T245PWR | Lower max data rate (240Mbps), no Ioff, VCC range limited to 1.65–3.6V | Not suitable for <1.65V systems or partial-power-down designs | Select when cost sensitivity outweighs low-voltage support and Ioff requirements |
| TXS0104EPWR | Auto-direction sensing (no DIR pin), lower drive strength (±8mA), supports 1.2–3.6V but only 60Mbps max | Unidirectional or auto-direction use cases only; insufficient for high-speed parallel buses | Select for simple I²C/SPI translation where direction control overhead must be eliminated |
Compared with SN74LVC4T245PWR and TXS0104EPWR, the SN74AVC4T245 uniquely delivers 380Mbps performance with full 1.2V compatibility and Ioff - making it the only option for next-generation ultra-low-voltage, high-throughput, and power-sequencing-critical designs.
Availability
SN74AVC4T245 is available at Aetrix Electronics and suitable for mobile processor interfacing, industrial sensor hubs, automotive display links, and enterprise SSD controller interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AVC4T245 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, personal electronics, and communications markets.
The SN74AVC4T245 belongs to TI's AVC (Advanced Very-low-voltage CMOS) logic family, engineered specifically for high-speed, low-voltage bidirectional translation in space-constrained, power-sensitive applications such as portable computing and advanced driver-assistance systems.
FAQ
What voltage ranges does the SN74AVC4T245 support on its A and B ports?
The SN74AVC4T245 supports independent supply voltages from 1.2V to 3.6V on both VCCA (A port) and VCCB (B port), enabling translation between any combination of 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains. This full-range compatibility is confirmed in Section 5.3 (Recommended Operating Conditions) and Section 7.1 of the official datasheet SCES576I.
How does the SN74AVC4T245 handle power sequencing during system startup or shutdown?
The SN74AVC4T245 uses Ioff circuitry to automatically disable outputs when either VCCA or VCCB is at GND, preventing damaging backflow current. To ensure safe high-impedance state during power transitions, OE pins must be tied to VCCA via a pullup resistor - a design requirement explicitly documented in Section 8.3 and Figure 8-1 of the SN74AVC4T245 datasheet.
What is the maximum data rate achievable with the SN74AVC4T245, and under what conditions?
The SN74AVC4T245 achieves up to 380Mbps when translating from 1.8V to 3.3V, as specified in Section 1 (Features) and validated in Section 5.7–5.11 switching characteristics tables. Performance degrades to 200Mbps for sub-1.8V translations and 100Mbps when translating to 1.2V - all values are measured with CL = 15pF and defined VIH/VIL thresholds per operating voltage.
Does the SN74AVC4T245 require external level shifters for its DIR and OE control inputs?
No. The SN74AVC4T245 has VCCA-referenced control inputs: DIR and OE thresholds scale with VCCA (e.g., VIH = VCCA × 0.65), eliminating the need for external level shifters. This architecture is detailed in Section 4 (Pin Functions), Section 5.3 (Recommended Operating Conditions), and Section 7.3.1 of the SN74AVC4T245 datasheet.
Can the SN74AVC4T245 be used in hot-swap or mixed-voltage debug scenarios?
Yes. Its 4.6V-tolerant I/Os (Section 5.1 Absolute Maximum Ratings) allow safe connection to higher-voltage systems (e.g., 3.3V or 5V test equipment) without external clamping diodes. This capability is explicitly cited in Section 1 (Features) and enables reliable in-system debugging and field service operations.
SN74AVC4T245PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 2
- Number of Bits per Element:
- 2
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74AVC4T245PWR FAQ
1.How can I place an order for SN74AVC4T245PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC4T245PWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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5.How can I obtain technical support or documentation for SN74AVC4T245PWR?
For technical support, including SN74AVC4T245PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC4T245PWR requirements.
6.How does Aetrix verify that SN74AVC4T245PWR is sourced from the original manufacturer or authorized distributors?
All SN74AVC4T245PWR 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 SN74AVC4T245PWR meets industry standards.
7.What is the process for return or replacement of SN74AVC4T245PWR?
All SN74AVC4T245PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC4T245PWR, 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 SN74AVC4T245PWR part is unused and in its original packaging.
Return procedure for SN74AVC4T245PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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