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Texas Instruments SN74AVC4T245PWR-P
- Part No.:
- SN74AVC4T245PWR-P
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AVC4T245PWR-P.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,959
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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 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 serves as a configurable interface bridge in mixed-voltage digital systems.
For engineers reviewing the SN74AVC4T245 datasheet, SN74AVC4T245 pinout, SN74AVC4T245 application, or SN74AVC4T245 equivalent, key selection considerations include dual-rail voltage flexibility, direction-control logic referencing VCCA, 3-state output enable timing, Ioff-enabled isolation during power sequencing, and thermal performance across TSSOP-16 (PW) packaging.
Technical Context
The SN74AVC4T245 implements a fully asynchronous dual-rail architecture where A-port I/Os and control inputs (DIR, OE) are referenced to VCCA, while B-port I/Os track VCCB - enabling independent supply domain operation. Its logic diagram confirms two independent 2-bit sections, each with dedicated DIR and OE pins for granular bus control.
Functional modes are defined by OE (global 3-state enable) and DIR (per-section direction control), supporting three states: A→B transmission, B→A transmission, or full high-impedance isolation. The device guarantees VCC isolation: if either VCCA or VCCB = GND, both ports enter high-Z, preventing backfeed current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V each - enables translation between any pair of 1.2/1.5/1.8/2.5/3.3V logic domains without level-shifter redesign. |
| Max Data Rate | 380Mbps (1.8V→3.3V) - supports high-speed interconnects like low-voltage parallel buses or legacy interface bridging. |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage peripherals without external clamping or protection circuitry. |
| Ioff Current | ±1μA max at 0V supply - ensures negligible leakage during partial power-down, critical for battery-backed or hot-swap subsystems. |
| ESD Rating | 8kV HBM - meets industrial-grade robustness requirements for handling and board assembly without special ESD controls. |
| Propagation Delay | 2.6–3.6ns (typ, VCCA=3.3V/VCCB=1.2–3.3V) - enables sub-4ns timing margins in synchronous 200+MHz bus applications. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial environments including factory automation and telecom infrastructure. |
Pinout & Package
TSSOP-16 (PW) package: 5mm × 6.4mm body, 0.65mm pitch, exposed thermal pad (not electrically connected). Pin 1 marked via dot; pin 1 corner located at top-left when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction-control input (per section) | Referenced to VCCA; high = A→B data flow, low = B→A flow - enables independent bidirectional control of two 2-bit lanes. |
| 1OE, 2OE | Output-enable input (per section) | Referenced to VCCA; high = 3-state (Hi-Z) on associated port - allows selective bus isolation without affecting other sections. |
| 1A1–2A2 | A-port I/O (4 pins) | Referenced to VCCA; bidirectional data path - connects to controller-side logic operating at VCCA voltage. |
| 1B1–2B2 | B-port I/O (4 pins) | Referenced to VCCB; bidirectional data path - interfaces with peripheral-side logic operating at VCCB voltage. |
| VCCA, VCCB | Power supply inputs | Independent rails; VCCA powers A-port I/Os and all control inputs; VCCB powers B-port I/Os - decouples supply noise and sequencing. |
| GND (Pins 8,9) | Ground reference | Dual ground pins reduce impedance and improve noise immunity for high-speed switching; must be connected to common system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Supports simultaneous 1.2V↔1.5V, 1.5V↔1.8V, 1.8V↔2.5V, 2.5V↔3.3V, or any combination - eliminates need for multiple discrete translators. |
| VCC isolation | Automatic Hi-Z on both ports if either VCCA or VCCB = GND - prevents back-current damage during asymmetric power-up/down sequences. |
| Ioff partial-power-down | Disables output drivers and blocks I/O leakage when VCCA or VCCB = 0V - essential for low-power suspend/resume in portable and IoT devices. |
| 4.6V-tolerant I/Os | Accepts input voltages up to 4.6V regardless of VCCA/VCCB setting - simplifies interface to 5V-tolerant legacy peripherals without external resistors. |
| Per-section DIR/OE control | Two independent 2-bit channels allow concurrent A→B and B→A transfers or selective channel disabling - increases bus utilization efficiency. |
Applications
| Industrial PLC Backplane Interface | Mobile SoC-to-Peripheral Bridge |
|---|---|
|
Use Scenario: Interfacing a 3.3V FPGA-based motion controller with 1.8V I²C sensors and 2.5V ADCs on a shared backplane. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing four independent signal pairs with per-lane direction control and 3-state isolation during arbitration. Use Value: Eliminates need for separate level shifters per peripheral; 380Mbps capability exceeds I²C Fast-Mode Plus (1Mbps) and SPI (50MHz) timing requirements. |
Use Scenario: Connecting a 1.2V mobile application processor to 1.8V display interface and 3.3V audio codec in a smartphone mainboard. IC Role / Device Role / Timing Role: Dual-rail bus transceiver enabling simultaneous low-voltage core communication and legacy peripheral support with controlled power sequencing. Use Value: Ioff and VCC isolation prevent backfeed during processor sleep mode; 4.6V I/O tolerance accommodates display panel reset signals without clamping diodes. |
| Enterprise SSD Controller Interface | Telecom Baseband FPGA Interconnect |
|
Use Scenario: Bridging a 1.5V NVMe controller ASIC to 3.3V SATA PHY and 1.2V flash memory buffers in an enterprise SSD module. IC Role / Device Role / Timing Role: High-speed bidirectional translator with sub-4ns propagation delay and precise OE-controlled 3-state timing for burst-mode data transfer. Use Value: 200Mbps minimum data rate across all supported voltage combinations meets PCIe Gen1 x1 (250MB/s) and SATA II (300MB/s) bandwidth needs. |
Use Scenario: Enabling voltage-domain interoperability between a 2.5V FPGA baseband processor and 1.8V RF front-end ICs in a 4G/LTE small cell radio. IC Role / Device Role / Timing Role: Configurable bus transceiver providing isolated, direction-controlled signal routing with ESD-hardened I/Os for harsh RF environments. Use Value: 8kV HBM ESD rating exceeds IEC 61000-4-2 Level 4 requirements; thermal resistance (RθJA = 102.8°C/W) supports operation at 85°C ambient. |
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), 3.6V max VCC only, no 4.6V I/O tolerance | Suitable for cost-sensitive consumer designs with ≤2.5V domains and no 5V-tolerant interface requirement | Choose when 380Mbps and 4.6V tolerance are not needed; lower static current (ICC = 10μA vs 16μA) |
| TXS0104EPWR | Auto-direction sensing (no DIR pin), open-drain outputs, lower drive strength (±8mA), no Ioff | Better for push-pull-to-open-drain conversion (e.g., I²C), unsuitable for high-speed push-pull buses requiring precise direction control | Prefer for I²C/SMBus translation; avoid for SPI/parallel bus applications needing deterministic direction and 380Mbps throughput |
Compared with SN74LVC4T245PWR and TXS0104EPWR, the SN74AVC4T245 delivers superior speed, wider voltage range, and robust Ioff/VCC isolation - making it the optimal choice for high-reliability, multi-domain industrial and telecom interconnects where precise control and power sequencing integrity are mandatory.
Availability
SN74AVC4T245 is available at Aetrix Electronics and suitable for industrial PLC backplanes, mobile SoC peripheral bridges, enterprise SSD controllers, and telecom baseband FPGA interconnects requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
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 leader specializing in analog, embedded processing, and connectivity solutions, with over 50 years of innovation in high-reliability interface and power management ICs.
The SN74AVC4T245 belongs to TI's AVC (Advanced Very-low-voltage CMOS) logic family, designed specifically for ultra-low-voltage bidirectional translation in space-constrained, power-sensitive applications across industrial, telecom, and computing markets.
FAQ
What voltage ranges does the SN74AVC4T245 support on its A and B ports?
The SN74AVC4T245 supports independent 1.2V to 3.6V operation on both VCCA (A port and control inputs) and VCCB (B port). This allows translation between any combination of 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains. The SN74AVC4T245 is specified down to 1.2V and optimized for 1.4V–3.6V operation, ensuring reliable functionality across modern low-voltage systems.
How does the SN74AVC4T245 handle power sequencing when VCCA and VCCB ramp at different rates?
The SN74AVC4T245 incorporates VCC isolation: if either VCCA or VCCB is at GND, both A and B ports automatically enter high-impedance state, preventing damaging back-current flow. Additionally, its Ioff feature disables outputs when either supply is unpowered, limiting leakage to ±1μA. For safe power-up, tie OE to VCCA via a pullup resistor to ensure Hi-Z until both supplies stabilize - the SN74AVC4T245 enforces this behavior by design.
Can the SN74AVC4T245 interface with 5V logic components?
Yes - the SN74AVC4T245 features 4.6V-tolerant I/Os on both A and B ports, meaning it safely accepts input voltages up to 4.6V regardless of VCCA or VCCB setting. This allows direct connection to 5V-tolerant peripherals (e.g., legacy microcontrollers or displays) without external clamping diodes or resistive dividers. However, output voltage swing remains limited to VCCA or VCCB, so level-shifting to true 5V logic requires additional circuitry.
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. Other configurations deliver 200Mbps (<1.8V ↔ 3.3V), 200Mbps (↔ 2.5V or 1.8V), 150Mbps (↔ 1.5V), and 100Mbps (↔ 1.2V). These rates are validated under recommended operating conditions with proper layout, termination, and 15pF load capacitance - the SN74AVC4T245's sub-4ns propagation delay enables these speeds in real-world PCB implementations.
Does the SN74AVC4T245 require external pullup/pulldown resistors on DIR or OE pins?
No - the SN74AVC4T245 has internally biased control inputs referenced to VCCA, eliminating the need for external biasing on DIR or OE. However, TI recommends tying OE to VCCA via a pullup resistor during power-up/down to guarantee high-impedance state before supplies stabilize. The resistor value depends on the driver's sink capability; typical values range from 10kΩ to 100kΩ - this practice ensures predictable behavior and is explicitly required for robust operation of the SN74AVC4T245.
SN74AVC4T245PWR-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74AVC4T245PWR-P FAQ
1.How can I place an order for SN74AVC4T245PWR-P through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC4T245PWR-P 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 SN74AVC4T245PWR-P reliable?
The price and inventory of SN74AVC4T245PWR-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC4T245PWR-P is usually 5 days.
3.What payment methods are accepted for SN74AVC4T245PWR-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVC4T245PWR-P transactions.
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SN74AVC4T245PWR-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC4T245PWR-P 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 SN74AVC4T245PWR-P?
For technical support, including SN74AVC4T245PWR-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC4T245PWR-P requirements.
6.How does Aetrix verify that SN74AVC4T245PWR-P is sourced from the original manufacturer or authorized distributors?
All SN74AVC4T245PWR-P 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-P meets industry standards.
7.What is the process for return or replacement of SN74AVC4T245PWR-P?
All SN74AVC4T245PWR-P units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC4T245PWR-P, 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-P part is unused and in its original packaging.
Return procedure for SN74AVC4T245PWR-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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