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Texas Instruments SN74AXC2T45DTMR
- Part No.:
- SN74AXC2T45DTMR
- Manufacturer:
- Texas Instruments
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
SN74AXC2T45DTMR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 8X2SON
- Quantity:
- Payment:
- Shipping:
Inventory:8,471
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Product details
Overview
SN74AXC2T45DTMR from Texas Instruments is a 2-bit noninverting translating transceiver with dual configurable power rails (VCCA and VCCB), supporting voltage translation between 0.65V and 3.6V per port, AEC-Q100 qualified for automotive use, operating from –40°C to +125°C, and delivering up to 380Mbps data rate in 1.8V-to-3.3V translation - used in bidirectional I/O bridging between mixed-voltage SoC peripherals and sensors.
For engineers reviewing the SN74AXC2T45DTMR datasheet, SN74AXC2T45DTMR pinout, SN74AXC2T45DTMR application, or SN74AXC2T45DTMR equivalent, key selection considerations include VCCA/VCCB supply independence, Ioff partial-power-down support, VCC isolation behavior below 100mV, glitch-free power sequencing, and compatibility with AVC-level-shifter systems.
Technical Context
The SN74AXC2T45DTMR implements asynchronous bidirectional data flow controlled by a single DIR input referenced to VCCA, enabling A→B or B→A transmission without clocking. Its dual-rail architecture allows independent operation of A-port (VCCA-referenced) and B-port (VCCB-referenced) I/Os across overlapping 0.65V–3.6V ranges.
It features robust isolation logic: if either VCCA or VCCB falls below 100mV, both ports enter high-impedance state; Ioff circuitry prevents leakage during partial power-down; and ESD protection exceeds ±8000V HBM and ±1000V CDM per JESD22.
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., advanced MCU I/O) and 3.3V peripherals without external level-shifters. |
| Max Data Rate | 380Mbps (1.8V→3.3V) - supports high-speed serial control links like I²C fast-mode-plus or GPIO-timed sensor readouts. |
| Operating Temperature | –40°C to +125°C - validated for under-hood automotive ECUs and industrial motor drives. |
| VCC Isolation Threshold | <100mV on either rail disables all outputs to high-Z - prevents back-driving powered-down subsystems during brownout or hot-swap events. |
| Ioff Current | <±8µA at 125°C - ensures negligible leakage into unpowered buses during system sleep modes. |
| Propagation Delay (tpd) | Min 0.5ns, max 106ns (A→B, VCCA=0.7V/VCCB=3.3V, –40°C to 125°C) - guarantees deterministic timing for real-time control loops. |
| ESD Rating (HBM) | ±8000V - meets stringent board-level ESD immunity requirements for consumer and automotive end-equipment. |
Pinout & Package
SN74AXC2T45DTMR uses an 8-pin X2SON package (0.8mm × 1.35mm, 0.4mm pitch), optimized for space-constrained automotive and portable applications. Thermal resistance RθJA = 225.9°C/W enables reliable operation in compact PCB layouts without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2 | Data I/O (Port A) | Bi-directional signals referenced to VCCA; tolerate voltages from 0V to VCCA + 0.2V in active state. |
| B1, B2 | Data I/O (Port B) | Bi-directional signals referenced to VCCB; tolerate voltages from 0V to VCCB + 0.2V in active state. |
| DIR | Direction Control Input | Active-high signal referenced to VCCA; determines data flow direction (A→B when HIGH, B→A when LOW). |
| VCCA | Power Supply (Port A) | Supplies A-port logic and I/O; must be stable within 0.65V–3.6V; powers DIR input. |
| VCCB | Power Supply (Port B) | Supplies B-port logic and I/O; independent of VCCA; enables true dual-voltage domain bridging. |
| GND | Ground Reference | Common return path for both ports; must be low-impedance to minimize ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent VCCA/VCCB supplies (0.65V–3.6V) allow seamless interconnection of heterogeneous voltage domains - e.g., 0.8V FPGA I/O to 3.3V CAN transceiver. |
| VCC isolation | Automatic high-impedance output disable when either VCCA or VCCB drops below 100mV - prevents bus contention during power sequencing or fault conditions. |
| Ioff partial-power-down | Leakage current ≤ ±8µA at 125°C ensures safe operation when one side is unpowered while the other remains active - critical for battery-backed subsystems. |
| Glitch-free power sequencing | No power-up order dependency between VCCA and VCCB - simplifies system-level power management and eliminates need for sequencing controllers. |
| AEC-Q100 qualification | Qualified to Grade 1 (–40°C to +125°C) with full reliability testing - approved for safety-critical automotive applications including ADAS and body control modules. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Bridging 1.8V microcontroller GPIOs to 24V digital input conditioning circuits with isolated 3.3V logic interface. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver enabling safe, low-latency communication between mixed-voltage subsystems in vehicle door modules and lighting controllers. Use Value: Eliminates discrete resistor-divider or MOSFET-based level shifters, reducing BOM count and PCB area while maintaining AEC-Q100 compliance and thermal robustness. |
Use Scenario: Interfacing 0.9V FPGA configuration I/O to legacy 5V TTL-compatible fieldbus peripherals in modular automation controllers. IC Role / Device Role / Timing Role: Voltage-translating bus transceiver providing direction-controlled data flow between FPGA-configured logic and industrial I/O cards. Use Value: Supports hot-plug I/O expansion without risk of bus contention; Ioff and VCC isolation prevent damage during module insertion/removal under power. |
| Wireless Baseband Processor Interface | Enterprise SSD NVMe Controller Bridge |
|
Use Scenario: Connecting 0.7V/0.8V mobile AP memory interfaces to 1.2V/1.8V RF front-end ICs in 5G small-cell base stations. IC Role / Device Role / Timing Role: Low-voltage translating transceiver managing bidirectional control signaling (e.g., reset, interrupt, status) between AP and RFIC domains. Use Value: Enables sub-1V operation required for power-sensitive wireless infrastructure while sustaining >300Mbps throughput and meeting ESD immunity standards. |
Use Scenario: Level-shifting between 1.2V NVMe controller GPIOs and 3.3V PCIe switch management pins in enterprise solid-state storage enclosures. IC Role / Device Role / Timing Role: Configurable dual-rail transceiver handling hot-plug detection, power sequencing, and link training signals across voltage domains. Use Value: Guarantees glitch-free startup and shutdown sequencing; VCC isolation prevents backfeed during drive insertion; AEC-Q100 grade ensures long-term reliability in 24/7 datacenter environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar translating transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC2T45DTMR | Lower max VCC (3.6V → 3.3V); no AEC-Q100 qualification; higher Ioff (±20µA @125°C); same pinout and function. | Targeted at commercial-grade portable electronics; not suitable for automotive or extended-temperature industrial use. | Select when cost sensitivity outweighs automotive qualification and ultra-low leakage requirements. |
| TXS0202DCUR | Auto-direction sensing (no DIR pin); lower max speed (100Mbps); supports 1.2V–3.6V rails; smaller 8-pin VSSOP package. | Best for simple push-pull bus extensions where direction is data-driven (e.g., I²C), not control-driven; lacks DIR-based deterministic timing. | Select for I²C/SMBus applications requiring zero-control-pin operation; avoid where precise DIR-controlled timing or >100Mbps is required. |
Compared with SN74AVC2T45DTMR and TXS0202DCUR, the SN74AXC2T45DTMR uniquely combines AEC-Q100 qualification, sub-1V operation down to 0.65V, <±8µA Ioff at 125°C, and 380Mbps capability - making it the only choice for high-reliability, high-speed, ultra-low-voltage automotive and industrial bridging.
Availability
SN74AXC2T45DTMR is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, wireless infrastructure baseband interfaces, and enterprise SSD NVMe controller bridges requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for SN74AXC2T45DTMR 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 technologies, with over 90 years of innovation in power management, signal chain, and automotive electronics.
The SN74AXC2T45DTMR belongs to TI's AXC family of ultra-low-voltage translating transceivers, designed specifically for next-generation automotive, industrial, and communications systems demanding sub-1V interoperability, robust isolation, and AEC-Q100 reliability.
FAQ
What is the minimum supply voltage supported by SN74AXC2T45DTMR on VCCA and VCCB?
The SN74AXC2T45DTMR supports a minimum supply voltage of 0.65V on both VCCA and VCCB rails, enabling direct interfacing with advanced low-power processors and memory interfaces operating below 1V. This specification is guaranteed across the full –40°C to +125°C temperature range and is verified per TI's SCES880D datasheet Section 5.3.
Does SN74AXC2T45DTMR require a specific power-up sequence for VCCA and VCCB?
No - the SN74AXC2T45DTMR features glitch-free power supply sequencing, meaning VCCA and VCCB may be powered on or off in any order without causing bus contention, output glitches, or latch-up. This behavior is enabled by internal isolation circuitry and is confirmed in the device's Feature list and Section 7.3 of the datasheet.
How does the VCC isolation feature behave in SN74AXC2T45DTMR during brownout conditions?
When either VCCA or VCCB drops below 100mV, the SN74AXC2T45DTMR automatically places both A-port and B-port I/Os into a high-impedance state - effectively isolating the powered domain from the browned-out side. This prevents back-driving, current injection, or unintended logic states, and is explicitly defined in Section 1 (Features) and Section 7.3 of the SN74AXC2T45DTMR datasheet.
Is SN74AXC2T45DTMR compatible with legacy AVC-series level shifters?
Yes - the SN74AXC2T45DTMR is explicitly stated as compatible with the AVC family of level shifters (per Section 1, Feature #8 of the datasheet). This includes functional equivalence in voltage translation range, I/O structure, and control logic, allowing drop-in replacement in existing AVC-based designs where enhanced specs (e.g., lower Vmin, AEC-Q100, lower Ioff) are beneficial.
What is the maximum data rate achievable with SN74AXC2T45DTMR in a 1.2V-to-2.5V translation scenario?
In a 1.2V-to-2.5V translation (VCCA = 1.2V, VCCB = 2.5V), the SN74AXC2T45DTMR achieves a maximum propagation delay (tpd) of 7ns (A→B, –40°C to 125°C, per Table 5.9), corresponding to a practical data rate exceeding 140Mbps. At 25°C, tpd improves to 5ns, supporting >200Mbps in well-controlled layouts - consistent with its rated 380Mbps peak in optimal 1.8V→3.3V conditions.
SN74AXC2T45DTMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AXC
- Package/Case:
- 8-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 2
- Input Type:
- -
- Output Type:
- Tri-State, Non-Inverted
- 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:
- 8-X2SON (1.35x0.8)
SN74AXC2T45DTMR FAQ
1.How can I place an order for SN74AXC2T45DTMR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AXC2T45DTMR 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 SN74AXC2T45DTMR reliable?
The price and inventory of SN74AXC2T45DTMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AXC2T45DTMR is usually 5 days.
3.What payment methods are accepted for SN74AXC2T45DTMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AXC2T45DTMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AXC2T45DTMR?
SN74AXC2T45DTMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AXC2T45DTMR 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 SN74AXC2T45DTMR?
For technical support, including SN74AXC2T45DTMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AXC2T45DTMR requirements.
6.How does Aetrix verify that SN74AXC2T45DTMR is sourced from the original manufacturer or authorized distributors?
All SN74AXC2T45DTMR 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 SN74AXC2T45DTMR meets industry standards.
7.What is the process for return or replacement of SN74AXC2T45DTMR?
All SN74AXC2T45DTMR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AXC2T45DTMR, 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 SN74AXC2T45DTMR part is unused and in its original packaging.
Return procedure for SN74AXC2T45DTMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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