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Texas Instruments SN74AVC1T45YZTR
- Part No.:
- SN74AVC1T45YZTR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVC1T45YZTR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 6DSBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AVC1T45 from Texas Instruments is a single-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains; supports up to 500Mbps (1.8V→3.3V), features ±12mA drive at 3.3V, 4.6V I/O tolerance, and VCC isolation for robust power sequencing in mixed-voltage systems.
For engineers reviewing the SN74AVC1T45 datasheet, SN74AVC1T45 pinout, SN74AVC1T45 application, or SN74AVC1T45 equivalent, key selection criteria include configurable dual-rail operation (VCCA/VCCB = 1.2–3.6V), direction-controlled data flow (DIR referenced to VCCA), Ioff partial-power-down support, and NanoFree™ DSBGA package compatibility with high-density PCB layouts.
Technical Context
The SN74AVC1T45 implements a noninverting, dual-rail architecture where A-port logic levels track VCCA and B-port levels track VCCB - both independently configurable from 1.2V to 3.6V. DIR input is powered by VCCA and controls signal direction: high enables A→B transmission, low enables B→A.
VCC isolation ensures both ports enter high-impedance state if either VCCA or VCCB is at GND, preventing backdrive during power-up/down. Ioff circuitry disables outputs during partial power-down, blocking damaging current flow when one supply is inactive while the other remains active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V each - enables universal translation across 1.2V/1.5V/1.8V/2.5V/3.3V nodes without external level-shifters |
| Max Data Rate | 500Mbps (1.8V→3.3V) - supports high-speed interfaces like SDIO, eMMC, or low-latency sensor buses |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with 3.3V systems even when VCCA/VCCB are as low as 1.2V |
| Output Drive | ±12mA at 3.3V - sufficient to drive 50Ω transmission lines or multiple CMOS loads without buffering |
| Propagation Delay | 2.8ns (A→B, VCCA=3.3V, VCCB=3.3V) - ensures sub-nanosecond timing margins in synchronous designs |
| ESD Protection | ±2000V HBM - meets industrial-grade robustness requirements for board-level handling and field operation |
| Ioff Current | ±0.1µA max - guarantees negligible leakage during partial power-down, critical for battery-backed subsystems |
Pinout & Package
SN74AVC1T45 is packaged in Texas Instruments' NanoFree™ DSBGA (YZP) - a 6-pin, 1.75mm × 1.25mm die-as-package solution optimized for ultra-compact, high-I/O-density applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply rail | Power source for A-port I/O and DIR input; defines A-side logic thresholds and output swing |
| GND | Ground reference | Common return path for both supply rails; required for stable biasing and noise immunity |
| A | Bidirectional I/O (A side) | Signal terminal referenced to VCCA; functions as input or output depending on DIR state |
| B | Bidirectional I/O (B side) | Signal terminal referenced to VCCB; mirrors A port's directionality under DIR control |
| DIR | Direction control input | Active-high signal powered by VCCA; determines data flow direction (H: A→B, L: B→A) |
| VCCB | B-port supply rail | Power source for B-port I/O; sets B-side voltage domain and output compliance |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent 1.2V–3.6V operation on VCCA and VCCB enables seamless interconnection of heterogeneous voltage domains |
| VCC isolation | Automatic high-impedance shutdown of both ports when either VCCA or VCCB = GND - eliminates need for external power-good sequencing logic |
| Ioff partial-power-down | Blocks reverse current flow during supply brownout or hot-swap events, protecting upstream drivers and preserving system integrity |
| NanoFree™ DSBGA package | 1.75mm × 1.25mm footprint with no leadframe or mold compound - reduces parasitic inductance and improves thermal performance in space-constrained designs |
| 3-state outputs with fast enable/disable | tPHZ/tPLZ ≤ 3.7ns (VCCA=3.3V, VCCB=3.3V) - minimizes bus contention window in bidirectional protocols like I²C or shared memory interfaces |
Applications
| Mobile Processor Interface | Industrial Sensor Hub |
|---|---|
Use Scenario: Interfacing a 1.8V application processor GPIO bank to a 3.3V industrial analog-to-digital converter (ADC) in a portable test instrument. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing control signals (CS, SCLK) and data lines (SDO/SDI) between mismatched voltage domains. Use Value: Eliminates discrete resistor-divider networks or dedicated level-shifter ICs, reducing BOM count and layout area while maintaining 500Mbps timing integrity. | Use Scenario: Connecting a 1.2V IoT microcontroller to multiple 2.5V and 3.3V legacy sensors (temperature, pressure, humidity) on a single PCB. IC Role / Device Role / Timing Role: Single-channel configurable translator enabling dynamic voltage adaptation per sensor interface without redesign. Use Value: Supports mixed-voltage sensor aggregation with <2.8ns propagation delay, ensuring deterministic sampling timing across all channels. |
| Automotive Body Control Module | Enterprise SSD Controller Interface |
Use Scenario: Level-shifting between a 1.5V automotive MCU and 3.3V CAN transceiver or LIN driver in a body control unit. IC Role / Device Role / Timing Role: Unidirectional translator for status/control lines with VCC isolation ensuring safe operation during battery voltage sag. Use Value: Guarantees high-Z state during 12V system brownout (VCCA=0V), preventing backfeed into the MCU's 1.5V rail and avoiding latch-up. | Use Scenario: Bridging a 1.8V NVMe controller to 3.3V PCIe switch or flash memory buffer in an enterprise SSD module. IC Role / Device Role / Timing Role: High-speed bidirectional translator for sideband signals (PERST#, CLKREQ#) requiring sub-3ns delay and 4.6V tolerance. Use Value: Enables direct integration without additional protection circuitry, meeting PCIe 4.0 sideband timing budgets and JEDEC JESD78 Class II latch-up immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0101DCUR | Open-drain outputs with auto-direction sensing; no DIR pin; lower drive (±2mA); 1.65–5.5V range | Suitable only for push-pull-to-open-drain conversion (e.g., I²C), not for full bidirectional data buses | Select TXS0101DCUR only for low-speed, open-drain protocols where automatic direction detection is required and drive strength is secondary. |
| SN74LVC1T45DBVR | Single-supply operation (VCC = 1.65–5.5V); no dual-rail capability; 3.6V max I/O tolerance; 24mA drive | Limited to same-voltage-domain translation or fixed-ratio level shift; cannot translate 1.2V↔3.3V directly | Choose SN74LVC1T45DBVR when both sides share a common supply or require higher drive strength but do not need independent rail control. |
Compared with TXS0101DCUR and SN74LVC1T45DBVR, the SN74AVC1T45 uniquely delivers true dual-rail configurability (1.2V–3.6V per rail), 4.6V I/O tolerance, and DIR-controlled deterministic direction - making it the only option for high-speed, mixed-voltage, bidirectional data paths requiring precise timing control and robust power sequencing.
Availability
SN74AVC1T45 is available at Aetrix Electronics and suitable for mobile processor interfaces, industrial sensor hubs, automotive body control modules, and enterprise SSD controller interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SN74AVC1T45 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The SN74AVC1T45 belongs to TI's AVC (Advanced Very-low-voltage CMOS) logic family, engineered specifically for ultra-low-voltage bidirectional translation in space-constrained, multi-rail systems such as smartphones, wearables, and edge AI modules.
FAQ
What voltage ranges does the SN74AVC1T45 support on its VCCA and VCCB rails?
The SN74AVC1T45 supports independent supply voltages from 1.2V to 3.6V on both VCCA and VCCB. This allows translation between any combination of standard logic nodes - including 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V - without external components. The device remains fully functional across this entire range, with guaranteed timing and drive specifications validated per datasheet switching characteristics tables.
How does the DIR pin function in the SN74AVC1T45, and what supply references it?
The DIR pin in the SN74AVC1T45 is a direction-control input referenced exclusively to VCCA. When DIR is high (VIH ≥ VCCA × 0.65), data flows from the A port to the B port; when DIR is low (VIL ≤ VCCA × 0.35), data flows from B to A. This VCCA-referenced design ensures consistent threshold behavior regardless of VCCB value, simplifying control logic integration in asymmetric voltage systems.
Does the SN74AVC1T45 support partial-power-down operation, and how is it implemented?
Yes, the SN74AVC1T45 supports partial-power-down via its Ioff feature. When either VCCA or VCCB is at 0V while the other remains powered, the Ioff circuitry disables all I/O outputs, limiting leakage current to ±0.1µA maximum. This prevents damaging current backflow through the device, protecting upstream drivers and enabling safe hot-swap or brownout scenarios in battery-powered or modular systems.
What is the maximum data rate supported by the SN74AVC1T45, and under what conditions?
The SN74AVC1T45 achieves a maximum data rate of 500Mbps when translating signals from 1.8V to 3.3V (VCCA = 1.8V, VCCB = 3.3V). Lower rates apply for other combinations: 320Mbps (<1.8V→3.3V), 280Mbps (→1.5V), and 240Mbps (→1.2V). These values are measured under specified load conditions (CL = 15pF) and reflect guaranteed minimum performance across –40°C to 85°C.
Which package variant does the SN74AVC1T45YZTR use, and what are its key mechanical advantages?
The SN74AVC1T45YZTR uses the YZP package - a 6-pin NanoFree™ DSBGA measuring 1.75mm × 1.25mm. Its die-as-package construction eliminates leadframe and mold compound, reducing parasitic inductance and thermal resistance (RθJA = 130°C/W). This enables superior high-frequency signal integrity and thermal performance in ultra-thin, high-density applications such as smartphone camera modules and wearable health sensors.
SN74AVC1T45YZTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 1
- Voltage - VCCA:
- 1.2 V ~ 3.6 V
- Voltage - VCCB:
- 1.2 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- 500Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-XFBGA, DSBGA
SN74AVC1T45YZTR FAQ
1.How can I place an order for SN74AVC1T45YZTR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC1T45YZTR 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 SN74AVC1T45YZTR reliable?
The price and inventory of SN74AVC1T45YZTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC1T45YZTR is usually 5 days.
3.What payment methods are accepted for SN74AVC1T45YZTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVC1T45YZTR transactions.
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4.How is shipping managed for SN74AVC1T45YZTR?
SN74AVC1T45YZTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC1T45YZTR 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 SN74AVC1T45YZTR?
For technical support, including SN74AVC1T45YZTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC1T45YZTR requirements.
6.How does Aetrix verify that SN74AVC1T45YZTR is sourced from the original manufacturer or authorized distributors?
All SN74AVC1T45YZTR 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 SN74AVC1T45YZTR meets industry standards.
7.What is the process for return or replacement of SN74AVC1T45YZTR?
All SN74AVC1T45YZTR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC1T45YZTR, 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 SN74AVC1T45YZTR part is unused and in its original packaging.
Return procedure for SN74AVC1T45YZTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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