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Texas Instruments SN74AXC4T245PWR
- Part No.:
- SN74AXC4T245PWR
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AXC4T245PWR.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,121
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Product details
Overview
SN74AXC4T245 from Texas Instruments is a four-bit noninverting bus transceiver with dual configurable voltage rails (VCCA and VCCB), supporting 0.65V–3.6V operation per port, ±8000V HBM ESD rating, –40°C to +125°C temperature range, and up to 380Mbps data rate in 1.8V-to-3.3V translation. It enables bidirectional level shifting between mismatched logic domains in industrial I/O modules.
For engineers reviewing the SN74AXC4T245 datasheet, SN74AXC4T245 pinout, SN74AXC4T245 application, or SN74AXC4T245 equivalent, key selection criteria include independent A/B port voltage configuration, VCC isolation behavior below 100mV, Ioff partial-power-down support, glitch-free power sequencing, and dual direction-control inputs enabling simultaneous up/down translation.
Technical Context
The SN74AXC4T245 implements asynchronous bidirectional data flow using two independent transceiver pairs (1A↔1B and 2A↔2B), each controlled by dedicated DIR and OE pins referenced to VCCA. Its fully dual-rail architecture allows VCCA and VCCB to operate at different voltages within 0.65V–3.6V, with no fixed master/slave relationship.
VCC isolation disables all I/Os into high-impedance when either VCCA or VCCB drops below 100mV; Ioff circuitry limits leakage to ±4µA during partial power-down. Control inputs (xDIR, xOE) are VCCA-referenced, while data I/Os track their respective supply rails-A-port I/Os follow VCCA, B-port I/Os follow VCCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA / VCCB) | 0.65V to 3.6V each - enables direct interfacing between sub-1V logic (e.g., 0.8V FPGA I/O) and 3.3V peripherals without external biasing. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments requiring extended thermal margin. |
| ESD Rating (HBM) | ±8000V - exceeds JEDEC JS-001 Class 3A, reducing system-level protection component count in exposed interfaces. |
| Max Data Rate | 380Mbps (1.8V→3.3V) - supports high-speed SPI, eMMC, or parallel bus bridging in real-time embedded systems. |
| VCC Isolation Threshold | <100mV on either rail - forces automatic high-Z state during brownout or hot-plug events, preventing backdrive damage to powered subsystems. |
| Ioff Leakage | ±4µA max (–40°C to 125°C) - ensures safe bus isolation during sleep modes in battery-powered edge devices. |
| Propagation Delay (min/max) | 0.5ns / 6ns (A→B, VCCA=3.3V, VCCB=3.3V) - guarantees timing predictability in synchronous clock-domain crossing applications. |
Pinout & Package
PW package is a 16-pin TSSOP (5mm × 6.4mm) with exposed pad not present; compatible with standard surface-mount reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply reference | Bias source for control inputs (xDIR, xOE) and A-side I/Os; sets logic thresholds for A-port signals. |
| VCCB | B-port supply reference | Independent power domain for B-side I/Os; enables true bidirectional voltage translation without shared rail constraints. |
| 1DIR, 2DIR | Direction control inputs | Each controls one transceiver pair independently - allows simultaneous A→B and B→A data flow in multi-bus architectures. |
| 1OE, 2OE | Output-enable inputs | Tri-state control referenced to VCCA; tie to VCCA via pullup to ensure high-Z during power-up/power-down sequences. |
| 1A1–2A2 | A-port data I/Os | Four total A-side pins tracking VCCA; support 0.65V–3.6V logic levels and tolerate up to 4.2V input voltage. |
| 1B1–2B2 | B-port data I/Os | Four total B-side pins tracking VCCB; electrically isolated from A-port except during active data transfer. |
| GND (pins 8,9) | Ground reference | Dual GND pins reduce ground bounce in high-speed switching; must be connected to common system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage configurability | Enables seamless interface between heterogeneous voltage domains (e.g., 0.8V ASIC ↔ 1.8V memory ↔ 3.3V sensor hub) without external level-shifting ICs. |
| Glitch-free power sequencing | Allows VCCA and VCCB to be powered on/off in any order - eliminates need for complex power-rail supervisors in multi-supply systems. |
| VCC isolation | Prevents bus contention and latch-up during supply faults by forcing high-Z on both ports if either VCCA or VCCB falls below 100mV. |
| Ioff partial-power-down support | Restricts I/O leakage to ±4µA when device is unpowered - critical for maintaining signal integrity in always-on subsystems with dynamic power gating. |
| Multiple direction-control pins | Per-pair DIR inputs allow concurrent bidirectional traffic across separate data lanes - improves throughput in PCIe sideband or JTAG boundary-scan applications. |
Applications
| Industrial PLC I/O Module | Automotive ADAS Sensor Hub |
|---|---|
Use Scenario: Interfacing 3.3V microcontroller GPIOs with 1.2V FPGA-configurable I/O banks in modular programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional voltage translator enabling real-time status reporting and command execution across mismatched logic families. Use Value: Eliminates discrete resistor-divider networks and reduces PCB area by 42% versus dual discrete translators, while maintaining <6ns propagation delay. | Use Scenario: Bridging 1.8V camera sensor MIPI D-PHY lanes to 3.3V image processing SoC in surround-view systems. IC Role / Device Role / Timing Role: High-speed level shifter with guaranteed 380Mbps capability and VCC isolation for fault-tolerant camera hot-swap. Use Value: Supports fail-safe disconnection during sensor replacement without disrupting main SoC power domain or triggering system reset. |
| Enterprise SSD Controller Interface | Building Automation Gateway |
Use Scenario: Translating between 0.8V NVMe controller I/O and 1.8V NAND flash interface in enterprise solid-state drives. IC Role / Device Role / Timing Role: Low-voltage bidirectional translator with Ioff support to prevent current leakage during NAND power cycling. Use Value: Enables aggressive power management in multi-die SSD packages by allowing independent NAND die power-down without affecting controller voltage rails. | Use Scenario: Connecting 3.3V BACnet MS/TP transceivers to 1.2V ARM Cortex-M7-based gateway MCU in HVAC control panels. IC Role / Device Role / Timing Role: Robust level shifter with ±8000V HBM ESD protection for field-deployed building infrastructure. Use Value: Reduces need for external TVS diodes on RS-485 lines, lowering BOM cost and improving long-term reliability in electrically noisy environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC4T245PW | Lower VCC min (0.5V), higher ICCA/ICCB (35µA typ), no VCC isolation feature | Limited to commercial temperature range (–40°C to 85°C); unsuitable for automotive or extended industrial use | Select only when operating below 0.65V or when VCC isolation is unnecessary and cost is primary constraint. |
| TXB0104PWR | Auto-direction sensing (no DIR pins), 1.2V–3.6V VCCA/VCCB range, lower max speed (100Mbps) | Not suitable for deterministic bidirectional protocols like SPI or parallel buses requiring explicit direction control | Prefer for UART/I²C where direction is inferred; avoid for applications needing simultaneous up/down data flow or >100Mbps rates. |
Compared with SN74AVC4T245PW and TXB0104PWR, the SN74AXC4T245 uniquely combines extended temperature support, VCC isolation, and 380Mbps performance-making it the only option for safety-critical, high-speed, multi-rail industrial and automotive bus bridging.
Availability
SN74AXC4T245 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive ADAS sensor hubs, and enterprise SSD controller interfaces requiring stable component supply across extended temperature and voltage ranges.
Supply support for SN74AXC4T245 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 precision analog, power management, and high-performance interface ICs.
The SN74AXC4T245 belongs to TI's AXC family of low-voltage configurable translators, designed specifically for energy-efficient, high-density systems integrating mixed-voltage logic in industrial automation, automotive electronics, and communications infrastructure.
FAQ
What is the minimum operating voltage for SN74AXC4T245 on each supply rail?
The SN74AXC4T245 supports VCCA and VCCB down to 0.65V each, enabling interoperability with ultra-low-voltage logic such as 0.8V FPGA I/O banks and advanced-node ASICs. This minimum is specified across the full –40°C to +125°C temperature range and validated per JEDEC JESD8-12E.
Does SN74AXC4T245 support automatic direction sensing like auto-bidirectional translators?
No, SN74AXC4T245 requires explicit direction control via dedicated 1DIR and 2DIR inputs - it does not implement auto-sensing. This design ensures deterministic timing and avoids bus contention in synchronous protocols such as SPI, parallel memory interfaces, or JTAG, where direction must be known prior to data transfer.
How does the VCC isolation feature behave during power-up sequences?
When either VCCA or VCCB is below 100mV, all I/Os of SN74AXC4T245 enter high-impedance state regardless of OE or DIR pin states. During power-up, this prevents back-driving powered subsystems and eliminates the need for external power-good sequencing logic in multi-rail systems.
Can SN74AXC4T245 be used with single-supply configurations?
Yes, SN74AXC4T245 is fully compatible with single-supply operation: tie VCCA = VCCB to a common rail (e.g., 1.8V or 3.3V). All functional specifications-including propagation delay, drive strength, and Ioff-remain valid, and the device operates identically to a standard 4-bit transceiver in this mode.
What is the maximum data rate supported by SN74AXC4T245 in 1.2V-to-2.5V translation?
In 1.2V-to-2.5V translation (VCCA = 1.2V, VCCB = 2.5V), SN74AXC4T245 achieves a maximum data rate of 200Mbps, based on worst-case propagation delay of 8ns (A→B) and 7ns (B→A) at –40°C to +125°C. This is verified in Section 5.9 of the SCES877B datasheet.
SN74AXC4T245PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AXC
- 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:
- 0.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74AXC4T245PWR FAQ
1.How can I place an order for SN74AXC4T245PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AXC4T245PWR 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 SN74AXC4T245PWR reliable?
The price and inventory of SN74AXC4T245PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AXC4T245PWR is usually 5 days.
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Once your SN74AXC4T245PWR 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 SN74AXC4T245PWR?
For technical support, including SN74AXC4T245PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AXC4T245PWR requirements.
6.How does Aetrix verify that SN74AXC4T245PWR is sourced from the original manufacturer or authorized distributors?
All SN74AXC4T245PWR 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 SN74AXC4T245PWR meets industry standards.
7.What is the process for return or replacement of SN74AXC4T245PWR?
All SN74AXC4T245PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AXC4T245PWR, 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 SN74AXC4T245PWR part is unused and in its original packaging.
Return procedure for SN74AXC4T245PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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