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Texas Instruments SN74AVC4T245DGVR
- Part No.:
- SN74AVC4T245DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 16-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AVC4T245DGVR.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,502
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Product details
Overview
SN74AVC4T245 from Texas Instruments is a 4-bit dual-supply noninverting bus transceiver enabling bidirectional voltage 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 serves in low-voltage interconnects between microcontrollers and peripherals in portable electronics.
For engineers reviewing the SN74AVC4T245 datasheet, SN74AVC4T245 pinout, SN74AVC4T245 application, or SN74AVC4T245 equivalent, key selection considerations include dual-rail voltage flexibility, direction-control per channel (1DIR/2DIR), independent 3-state enable (1OE/2OE), Ioff-enabled isolation during power sequencing, and verified 380Mbps throughput at 1.8V-to-3.3V translation.
Technical Context
The SN74AVC4T245 implements two independent 2-bit bidirectional translation channels, each with dedicated DIR and OE control inputs referenced to VCCA. Its fully configurable dual-rail architecture decouples A-port (VCCA-referenced) and B-port (VCCB-referenced) operation, supporting asymmetric voltage translation such as 1.2V↔3.3V without level-shifting circuitry.
Each channel operates in three functional states: A→B (DIR=H, OE=L), B→A (DIR=L, OE=L), or high-impedance isolation (OE=H). The Ioff circuit disables outputs when either VCCA or VCCB is at GND, preventing backflow current; VCC isolation ensures both ports enter high-Z if either supply is unpowered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V - enables universal translation across 1.2V/1.5V/1.8V/2.5V/3.3V nodes without external biasing |
| 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 higher-voltage legacy systems or transient overvoltage conditions |
| Ioff Current | ±0.1μA max - ensures negligible leakage during partial power-down, critical for battery-powered system sleep modes |
| ESD Protection | 8kV HBM, 150V MM, 1kV CDM - meets industrial-grade ESD robustness requirements per JESD22 |
| Propagation Delay | 2.6–3.6ns (VCCA/VCCB = 1.8V–3.3V) - guarantees timing-critical signal integrity in synchronous data paths |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial and consumer ambient environments |
Pinout & Package
SN74AVC4T245DGVR uses the TVSOP-16 (DGV) package: 3.6mm × 6.4mm body, 0.65mm pitch, exposed thermal pad. Pin numbering follows standard top-view SOIC/TVSOP convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per channel) | Referenced to VCCA; high = A→B, low = B→A; enables true bidirectional flow without external logic |
| 1OE, 2OE | Output-enable input (per channel) | Referenced to VCCA; high = high-impedance state on respective port; essential for bus arbitration and hot-swap isolation |
| 1A1–2A2 | A-port I/O (VCCA-referenced) | Four bidirectional data lines tied to VCCA domain; accept 1.2–3.6V logic levels and tolerate up to 4.6V |
| 1B1–2B2 | B-port I/O (VCCB-referenced) | Four bidirectional data lines tied to VCCB domain; independently scalable to match target interface voltage |
| VCCA, VCCB | Power supply inputs | Separate rails allow simultaneous operation at different voltages; VCCA powers all control inputs and A-port I/Os |
| GND | Ground reference | Two dedicated ground pins (pins 8 & 9) minimize ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 2-bit channels | Enables concurrent, asynchronous translation of two separate data paths (e.g., address + data, or dual peripheral lanes) |
| VCC isolation | Automatically places both ports in high-Z if either VCCA or VCCB drops to GND - prevents backfeed and simplifies power sequencing |
| Ioff partial-power-down | Blocks current flow between powered and unpowered domains - mandatory for USB-C, PCIe, and battery-backed subsystems |
| Configurable VIH/VIL thresholds | Input thresholds scale with VCCA (e.g., VIH = VCCA × 0.65), eliminating need for external resistive dividers in mixed-voltage designs |
| 16-pin TVSOP footprint | Compact 3.6mm × 6.4mm package supports high-density PCB layouts while maintaining hand-solderability and test probe access |
Applications
| Mobile SoC Interfacing | Industrial Sensor Hub |
|---|---|
Use Scenario: Connecting a 1.8V application processor to a 3.3V display interface or camera module. IC Role / Device Role / Timing Role: Bidirectional level translator managing data, clock, and control signals between mismatched voltage domains. Use Value: Eliminates discrete resistor networks and saves board space while sustaining 380Mbps pixel data transfer without timing skew. | Use Scenario: Aggregating multiple 1.2V/1.5V MEMS sensors into a 2.5V microcontroller-based edge node. IC Role / Device Role / Timing Role: Voltage-translating I²C/SPI bus extender with per-channel direction control and isolation. Use Value: Enables direct sensor integration without custom level-shifters; Ioff prevents sensor bus corruption during MCU sleep cycles. |
| Enterprise SSD Controller | Telecom Baseband Interface |
Use Scenario: Bridging a 1.2V NVMe controller to 1.8V NAND flash packages in ultra-thin client SSDs. IC Role / Device Role / Timing Role: High-speed, low-skew bidirectional data translator for parallel NAND command/data bus. Use Value: Meets 150Mbps minimum requirement for 1.2V→1.8V translation while maintaining signal integrity under thermal stress. | Use Scenario: Interfacing a 3.3V FPGA baseband processor to 1.5V RF transceiver ICs in small-cell radios. IC Role / Device Role / Timing Role: Dual-rail translator for JESD204B auxiliary control lines and GPIO status reporting. Use Value: Supports reliable 200Mbps control signaling across voltage domains with guaranteed 4.6V I/O tolerance against RF coupling noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4T245PW | Single-supply (1.65–3.6V), no VCCB rail; lower max speed (240Mbps), no Ioff | Limited to same-voltage-domain translation; unsuitable for partial-power-down or asymmetric rail designs | Select only when both sides operate at identical voltage and power sequencing is synchronized |
| TXB0104RGYR | Auto-direction sensing (no DIR pins), 1.2–3.6V dual-rail, 100Mbps max, no VCC isolation | Eliminates DIR control wiring but adds propagation delay uncertainty; lacks VCC isolation for unpowered domain protection | Prefer for simple, low-speed, auto-direction applications where DIR pin count must be minimized |
Compared with SN74LVC4T245PW and TXB0104RGYR, the SN74AVC4T245DGVR uniquely combines per-channel DIR/OE control, full VCC isolation, and 380Mbps capability - making it the only choice for high-speed, safety-critical, asymmetric dual-rail translation with robust power sequencing.
Availability
SN74AVC4T245DGVR is available at Aetrix Electronics and suitable for mobile SoC interfacing, industrial sensor hubs, enterprise SSD controllers, and telecom baseband interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SN74AVC4T245DGVR 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, personal electronics, and enterprise markets.
The SN74AVC4T245 belongs to TI's AVC (Advanced Very-low-voltage CMOS) logic family, engineered specifically for high-speed, low-voltage bidirectional level translation in space-constrained, power-sensitive applications.
FAQ
What voltage ranges does the SN74AVC4T245DGVR support on its A and B ports?
The SN74AVC4T245DGVR 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. Input thresholds scale with VCCA, and I/Os tolerate up to 4.6V regardless of supply, ensuring interoperability with legacy or overvoltage-prone systems.
How does the SN74AVC4T245DGVR handle power sequencing when one supply is off?
The SN74AVC4T245DGVR implements VCC isolation: if either VCCA or VCCB is at GND, both A and B ports automatically enter high-impedance mode. Combined with Ioff circuitry (<±0.1μA leakage), this prevents damaging backflow current during staggered power-up/down - a critical feature for battery-backed or hot-pluggable subsystems using the SN74AVC4T245DGVR.
What is the maximum data rate achievable with the SN74AVC4T245DGVR, and under what conditions?
The SN74AVC4T245DGVR achieves up to 380Mbps when translating from 1.8V to 3.3V (VCCA = 1.8V, VCCB = 3.3V). Rates decrease with lower-voltage combinations: 200Mbps for <1.8V→3.3V or ↔2.5V/1.8V, 150Mbps for ↔1.5V, and 100Mbps for ↔1.2V. These values are validated across –40°C to +85°C and reflect guaranteed timing margins, not typical-only performance.
Can the SN74AVC4T245DGVR replace the SN74LVC4T245 in an existing design?
No - the SN74AVC4T245DGVR is not a drop-in replacement for SN74LVC4T245. While pin-compatible in TVSOP-16, it requires separate VCCA and VCCB supplies (vs. single VCC), has different VIH/VIL referencing (to VCCA only), and offers Ioff/VCC isolation not present in LVC. Redesign is required to accommodate dual-rail layout, decoupling, and control logic for DIR/OE.
Does the SN74AVC4T245DGVR require external pull-up resistors on OE pins?
Yes - to ensure high-impedance state during power-up/power-down, OE pins must be tied to VCCA via pull-up resistors. TI recommends sizing based on driver sink strength; a 10kΩ resistor is typical. This prevents undefined output states before VCCA and VCCB stabilize, avoiding bus contention - a design requirement explicitly documented for reliable operation of the SN74AVC4T245DGVR.
SN74AVC4T245DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- 16-TFSOP (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-TVSOP
SN74AVC4T245DGVR FAQ
1.How can I place an order for SN74AVC4T245DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC4T245DGVR 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 SN74AVC4T245DGVR reliable?
The price and inventory of SN74AVC4T245DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC4T245DGVR is usually 5 days.
3.What payment methods are accepted for SN74AVC4T245DGVR?
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SN74AVC4T245DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC4T245DGVR 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 SN74AVC4T245DGVR?
For technical support, including SN74AVC4T245DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC4T245DGVR requirements.
6.How does Aetrix verify that SN74AVC4T245DGVR is sourced from the original manufacturer or authorized distributors?
All SN74AVC4T245DGVR 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 SN74AVC4T245DGVR meets industry standards.
7.What is the process for return or replacement of SN74AVC4T245DGVR?
All SN74AVC4T245DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC4T245DGVR, 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 SN74AVC4T245DGVR part is unused and in its original packaging.
Return procedure for SN74AVC4T245DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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