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Texas Instruments 74AVC4T245DGVRE4
- Part No.:
- 74AVC4T245DGVRE4
- Manufacturer:
- Texas Instruments
- Package:
- 16-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AVC4T245DGVRE4.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16TVSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74AVC4T245DGVRE4 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 mixed-voltage interconnects between processors and peripherals in portable electronics.
For engineers reviewing the 74AVC4T245DGVRE4 datasheet, 74AVC4T245DGVRE4 pinout, 74AVC4T245DGVRE4 application, or 74AVC4T245DGVRE4 equivalent, key selection criteria include dual-rail configurability, 3-state output control per port, Ioff-enabled isolation during power sequencing, and verified 380Mbps translation performance at 1.8V-to-3.3V.
Technical Context
The 74AVC4T245DGVRE4 implements two independent 2-bit bidirectional channels, each with dedicated DIR and OE controls referenced to VCCA. Its fully configurable dual-rail architecture allows simultaneous operation of A-port I/Os (VCCA-referenced) and B-port I/Os (VCCB-referenced) across non-matching supply voltages - e.g., 1.2V A-side interfacing to 3.3V B-side.
Functional mode control uses active-low OE to place either A- or B-port outputs in high-impedance state, while DIR selects direction per channel: high enables A→B, low enables B→A. The device maintains input circuitry always active, requiring defined logic levels on all data pins to prevent excessive ICCZ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Range | 1.2V to 3.6V - powers A-port I/Os and all control inputs (DIR/OE), defining VIH/VIL thresholds |
| VCCB Range | 1.2V to 3.6V - powers B-port I/Os independently, enabling true bidirectional level translation |
| Max Data Rate | 380Mbps - achievable only for 1.8V→3.3V translation; drops to 100Mbps for 1.2V→1.2V |
| I/O Tolerance | 4.6V - allows safe connection to higher-voltage systems without external clamping |
| Ioff Current | ±1μA max - prevents backflow current when VCCA or VCCB = 0V, supporting hot-insertion and partial power-down |
| ESD Rating | 8kV HBM - exceeds JEDEC JS-001 Class 2, suitable for handling in standard ESD-controlled environments |
| Operating Temp | –40°C to +85°C - qualified for industrial ambient conditions without derating |
Pinout & Package
74AVC4T245DGVRE4 is packaged in a 16-pin TVSOP (DGV) measuring 3.6mm × 6.4mm, with exposed thermal pad for enhanced heat dissipation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per channel) | Referenced to VCCA; high = A→B, low = B→A; determines signal flow path per 2-bit section |
| 1OE, 2OE | Output-enable input (per channel) | Referenced to VCCA; high = 3-state (Hi-Z) on associated port outputs; critical for bus arbitration |
| 1A1–2A2 | A-port I/O (4 pins) | Referenced to VCCA; bidirectional data lines for side A; must be driven to valid logic level at all times |
| 1B1–2B2 | B-port I/O (4 pins) | Referenced to VCCB; bidirectional data lines for side B; electrically isolated from A-side supply domain |
| VCCA, VCCB | Power supply inputs | Independent rails - VCCA powers A-side and controls; VCCB powers B-side only; no internal connection |
| GND | Ground reference | Common return for both supplies; requires low-impedance PCB plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent supply rails | VCCA and VCCB each configurable from 1.2V to 3.6V - enables arbitrary low-voltage node translation without external level shifters |
| Per-channel direction & enable control | Separate DIR and OE pins for each 2-bit section - allows asymmetric bus control (e.g., A→B on ch1, B→A on ch2) |
| Ioff partial-power-down protection | Blocks current flow when either VCCA or VCCB = 0V - eliminates risk of backfeeding during power sequencing or hot-swap events |
| 4.6V-tolerant I/Os | Withstands up to 4.6V on any I/O pin regardless of VCCA/VCCB - simplifies interface to legacy 5V peripherals via resistive dividers or direct connection |
| VCC isolation | Both ports enter Hi-Z if either VCCA or VCCB = GND - ensures safe default state during brown-out or supply fault |
Applications
| Mobile Processor Interconnect | Industrial Sensor Hub Interface |
|---|---|
Use Scenario: Connecting a 1.8V application processor to a 3.3V display timing controller in a handheld medical device. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing command/data flow between mismatched logic domains with precise timing control. Use Value: Eliminates need for discrete level-shifting components; supports 380Mbps pixel clock handshaking without added propagation delay or signal integrity loss. | Use Scenario: Aggregating 1.2V MEMS sensor outputs and routing them to a 2.5V microcontroller ADC interface in an IIoT edge node. IC Role / Device Role / Timing Role: Low-power bidirectional bridge enabling real-time sensor data transfer while maintaining strict supply domain separation. Use Value: Ioff and VCC isolation prevent sensor bias leakage during MCU sleep cycles, extending battery life by >15% in duty-cycled operation. |
| Automotive Infotainment Backplane | Enterprise SSD Controller Link |
Use Scenario: Interfacing a 1.5V automotive SoC to a 3.3V CAN transceiver and 2.5V audio codec within a head unit module. IC Role / Device Role / Timing Role: Multi-rail translator providing isolated, ESD-hardened signal paths between safety-critical and infotainment subsystems. Use Value: 8kV HBM ESD rating and –40°C to +85°C operation ensure robustness in automotive cabin environments without additional protection circuitry. | Use Scenario: Enabling communication between a 1.2V NVMe controller and 1.8V NAND flash packages in a high-density enterprise SSD module. IC Role / Device Role / Timing Role: High-speed bidirectional translator synchronizing command/address and data lanes across voltage domains. Use Value: Verified 200Mbps performance at 1.2V↔1.8V translation meets PCIe Gen3 timing budgets while reducing BOM count versus discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4T245PWR | Single-supply (1.65–3.6V), no VCCB rail; lower max speed (240Mbps); lacks Ioff | Only suitable for same-voltage-domain buffering or unidirectional translation with external control | Select only when both sides share compatible supply and partial-power-down is unnecessary |
| TXS0104EPWR | Auto-direction sensing (no DIR pin); open-drain B-side; lower drive strength (±8mA); 100Mbps max | Designed for I²C/SMBus; not suitable for push-pull parallel buses or high-speed data transfer | Choose only for low-speed, bidirectional serial interfaces where direction control overhead must be eliminated |
Compared with SN74LVC4T245PWR and TXS0104EPWR, the 74AVC4T245DGVRE4 uniquely delivers independent dual-rail operation, Ioff-enabled power sequencing safety, and 380Mbps throughput - making it the sole option for high-speed, mixed-voltage, push-pull parallel bus translation in compact industrial and portable designs.
Availability
74AVC4T245DGVRE4 is available at Aetrix Electronics and suitable for mobile processor interconnect, industrial sensor hub interface, automotive infotainment backplane, and enterprise SSD controller link applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74AVC4T245DGVRE4 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 SN74AVC4T245 product line targets low-voltage bidirectional bus translation in space-constrained, multi-rail systems - specifically engineered to eliminate discrete level-shifter complexity while ensuring robust operation across 1.2V–3.3V logic families.
FAQ
What voltage ranges does the 74AVC4T245DGVRE4 support on its A and B ports?
The 74AVC4T245DGVRE4 supports 1.2V to 3.6V on both VCCA (A-port supply) and VCCB (B-port supply), enabling translation between any combination of 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains. This full-range dual-rail capability is intrinsic to the 74AVC4T245DGVRE4 design and verified across all operating conditions in the official TI datasheet SCES576I.
How does the 74AVC4T245DGVRE4 handle power sequencing when one supply is off?
The 74AVC4T245DGVRE4 incorporates VCC isolation and Ioff circuitry: if either VCCA or VCCB is at GND, both ports enter high-impedance state, and Ioff limits reverse current to ±1μA max. This behavior is explicitly characterized in Section 5.5 of the 74AVC4T245DGVRE4 datasheet and ensures safe operation during hot-plug or staggered power-up sequences.
What is the maximum data rate supported by the 74AVC4T245DGVRE4, and under what conditions?
The 74AVC4T245DGVRE4 achieves up to 380Mbps only when translating from 1.8V to 3.3V (VCCA = 1.8V, VCCB = 3.3V). Rates drop to 200Mbps for sub-1.8V-to-3.3V, 150Mbps to 1.5V, and 100Mbps to 1.2V - all specified in Section 1 of the 74AVC4T245DGVRE4 datasheet and validated across temperature.
Can the 74AVC4T245DGVRE4 be used for unidirectional translation, and how is direction controlled?
Yes - the 74AVC4T245DGVRE4 supports unidirectional operation per channel using dedicated DIR pins: 1DIR controls direction for pins 1A1/1A2 ↔ 1B1/1B2, and 2DIR for 2A1/2A2 ↔ 2B1/2B2. Setting DIR high enables A→B; low enables B→A. This per-channel granularity is documented in Table 7-1 (Function Table) of the 74AVC4T245DGVRE4 datasheet.
Does the 74AVC4T245DGVRE4 require external pull-up resistors on OE pins, and why?
Yes - to ensure high-impedance state during power-up/power-down, OE pins must be tied to VCCA via a pull-up resistor. The minimum value depends on the driver's sink capability; TI recommends calculating based on VCCA and required rise time. This requirement is specified in Section 3 (Description) and Figure 8-1 of the 74AVC4T245DGVRE4 datasheet to prevent bus contention.
74AVC4T245DGVRE4 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:
- Discontinued at Digi-Key
- 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:
- 0.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TVSOP
74AVC4T245DGVRE4 FAQ
1.How can I place an order for 74AVC4T245DGVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVC4T245DGVRE4 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 74AVC4T245DGVRE4 reliable?
The price and inventory of 74AVC4T245DGVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVC4T245DGVRE4 is usually 5 days.
3.What payment methods are accepted for 74AVC4T245DGVRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVC4T245DGVRE4 transactions.
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4.How is shipping managed for 74AVC4T245DGVRE4?
74AVC4T245DGVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVC4T245DGVRE4 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 74AVC4T245DGVRE4?
For technical support, including 74AVC4T245DGVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVC4T245DGVRE4 requirements.
6.How does Aetrix verify that 74AVC4T245DGVRE4 is sourced from the original manufacturer or authorized distributors?
All 74AVC4T245DGVRE4 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 74AVC4T245DGVRE4 meets industry standards.
7.What is the process for return or replacement of 74AVC4T245DGVRE4?
All 74AVC4T245DGVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVC4T245DGVRE4, 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 74AVC4T245DGVRE4 part is unused and in its original packaging.
Return procedure for 74AVC4T245DGVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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