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Texas Instruments 74AVCH4T245RGYRG4
- Part No.:
- 74AVCH4T245RGYRG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
74AVCH4T245RGYRG4.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,212
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Product details
Overview
74AVCH4T245RGYRG4 from Texas Instruments is a 4-bit dual-supply noninverting bus transceiver enabling bidirectional voltage level translation between 1.2V–3.6V domains. It features independent VCCA and VCCB rails, 4.6V I/O tolerance, bus-hold circuitry, and Ioff support for partial power-down operation. Used in mixed-voltage system interconnects such as 1.8V MCU to 3.3V peripheral interfaces.
For engineers reviewing the 74AVCH4T245RGYRG4 datasheet, 74AVCH4T245RGYRG4 pinout, 74AVCH4T245RGYRG4 application, or 74AVCH4T245RGYRG4 equivalent, key selection criteria include configurable dual-rail operation, 380Mbps max data rate (1.8V→3.3V), 16-pin VQFN package with 4mm×3.5mm footprint, and guaranteed 100mA latch-up immunity per JESD78 Class II.
Technical Context
The 74AVCH4T245RGYRG4 implements two independent 2-bit bidirectional channels, each controlled by dedicated DIR and OE inputs referenced to VCCA. Its dual-rail architecture allows simultaneous operation at different supply voltages - e.g., VCCA = 1.8V (A-port logic) and VCCB = 3.3V (B-port logic) - with direction control determining signal flow (A→B or B→A).
Bus-hold circuitry actively maintains valid logic states on undriven A- or B-port inputs without external resistors, while Ioff disables outputs during power-down to prevent backflow current. The VCC isolation feature forces both ports into high-impedance when either VCCA or VCCB falls below ~0.4V, ensuring safe hot-plug behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V independently - enables translation across 1.2V/1.5V/1.8V/2.5V/3.3V nodes |
| Max Data Rate | 380Mbps (1.8V→3.3V) - supports high-speed interface bridging in portable and industrial systems |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage legacy signals without clamping diodes |
| Latch-up Immunity | >100mA per JESD78 Class II - ensures robustness in noisy or transient-prone environments |
| ESD Protection | ±8000V HBM, ±200V MM, ±1000V CDM - meets stringent handling and board-level ESD requirements |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Bus-Hold Current | ±25µA to ±100µA (VCCI-dependent) - sustains stable logic levels on floating inputs without external biasing |
Pinout & Package
74AVCH4T245RGYRG4 is housed in a 16-pin VQFN package (RGY) measuring 4.0mm × 3.5mm with 0.5mm pitch and wettable flanks. Thermal resistance RθJA = 68.8°C/W enables reliable operation in space-constrained, thermally demanding layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output-enable control (active-low) | Referenced to VCCA; high = 3-state on respective port pair; critical for bus arbitration and power sequencing |
| 1DIR, 2DIR | Direction-control input (active-high) | Referenced to VCCA; high = A→B data flow, low = B→A; enables full-duplex channel management |
| 1A1–2A2 | A-port I/O (VCCA-referenced) | 4-bit data path tied to VCCA rail; accepts 1.2V–3.6V logic; includes bus-hold on all inputs |
| 1B1–2B2 | B-port I/O (VCCB-referenced) | 4-bit data path tied to VCCB rail; accepts 1.2V–3.6V logic; tolerant up to 4.6V regardless of VCCB |
| VCCA | A-port supply | Power source for A-side I/Os and all control inputs (DIR/OE); defines VIH/VIL thresholds |
| VCCB | B-port supply | Power source for B-side I/Os; independent of VCCA - enables asymmetric voltage translation |
| GND | Ground reference | Two dedicated pins (pins 8 & 9) minimize ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent 1.2V–3.6V operation on A and B ports enables flexible interconnection of heterogeneous voltage domains |
| 4.6V I/O tolerance | Allows safe connection to 5V-tolerant or overvoltage-capable systems without external protection components |
| Integrated bus-hold | Eliminates need for external pull-up/pull-down resistors on unused data lines - reduces BOM count and layout area |
| Ioff partial-power-down | Prevents damaging current backflow when VCCA or VCCB is unpowered - essential for hot-swap and power-gating designs |
| VCC isolation | Forces both ports into high-Z if either VCCA or VCCB drops below ~0.4V - prevents false logic propagation during power sequencing |
Applications
| Mobile SoC Interconnect | Industrial PLC Backplane |
|---|---|
Use Scenario: Connecting a 1.2V application processor core to a 2.5V sensor hub or display interface in a smartphone or tablet. IC Role / Device Role / Timing Role: Bidirectional level translator managing synchronous data bursts between voltage-isolated subsystems. Use Value: Enables direct integration without discrete level-shifting ICs or resistor networks, reducing component count and PCB area. | Use Scenario: Isolating 3.3V fieldbus controller logic from 24V-rated I/O modules via optocoupler-driven digital isolators. IC Role / Device Role / Timing Role: Voltage translator buffering isolated digital signals before entering the 3.3V logic domain. Use Value: Maintains signal integrity across wide voltage gaps while supporting >200Mbps update rates for real-time diagnostics. |
| Automotive ADAS Camera Link | Enterprise SSD Controller Interface |
Use Scenario: Bridging a 1.8V MIPI CSI-2 image sensor output to a 3.3V automotive video processor in an ADAS camera module. IC Role / Device Role / Timing Role: High-speed, low-jitter bidirectional translator preserving timing margins in pixel-data streaming paths. Use Value: Achieves 380Mbps throughput with sub-3ns propagation delay - meets MIPI D-PHY timing compliance at 1.8V→3.3V. | Use Scenario: Interfacing a 1.5V NVMe controller ASIC to 1.2V NAND flash memory arrays in enterprise SSDs. IC Role / Device Role / Timing Role: Low-latency, low-power bidirectional translator in high-density memory subsystems. Use Value: Delivers 150Mbps performance at 1.2V translation with <10µA quiescent current - extends SSD battery life and thermal headroom. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4T245RGYR | Single-supply (VCC only), no VCCB rail; 1.65V–3.6V range; lacks Ioff and VCC isolation | Suitable only for same-voltage-domain buffering or unidirectional use cases with external direction control | Select when cost sensitivity outweighs need for true dual-rail translation or partial-power-down safety |
| TXB0104RGYR | Auto-direction sensing (no DIR pin), lower drive strength (±8mA vs ±12mA), 1.2V–3.6V dual-rail | Better for simple GPIO expansion; unsuitable for synchronous bus protocols requiring deterministic direction control | Choose for low-pin-count, low-power I²C/SPI peripheral expansion where DIR timing constraints are absent |
Compared with SN74LVC4T245RGYR and TXB0104RGYR, the 74AVCH4T245RGYRG4 uniquely combines explicit DIR control, full 1.2V–3.6V dual-rail flexibility, Ioff-enabled power sequencing, and 380Mbps performance - making it optimal for deterministic, high-speed, mixed-voltage bus bridging.
Availability
74AVCH4T245RGYRG4 is available at Aetrix Electronics and suitable for mobile SoC interconnect, industrial PLC backplane, automotive ADAS camera link, and enterprise SSD controller interface applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74AVCH4T245RGYRG4 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 SN74AVCH4T245 product line delivers high-speed, dual-supply bidirectional level translation for mixed-voltage system interconnects - designed specifically for reliability-critical bridging between modern low-voltage logic domains.
FAQ
What voltage ranges does the 74AVCH4T245RGYRG4 support on its A and B ports?
The 74AVCH4T245RGYRG4 supports independent 1.2V to 3.6V operation on both VCCA (A port) and VCCB (B port). This enables translation between any combination of 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains. The device remains fully functional even when VCCA and VCCB are set to different voltages within this range, and all I/Os tolerate up to 4.6V regardless of supply voltage.
How does the 74AVCH4T245RGYRG4 handle power sequencing during system startup or shutdown?
The 74AVCH4T245RGYRG4 incorporates VCC isolation and Ioff functionality to manage power sequencing safely. If either VCCA or VCCB drops below ~0.4V, both ports enter high-impedance mode. Additionally, Ioff disables output circuits during partial power-down, preventing backflow current. To ensure defined states during power transitions, tie OE pins to VCCA via a pull-up resistor sized per the driver's sink capability.
Does the 74AVCH4T245RGYRG4 require external pull-up or pull-down resistors on its data lines?
No, the 74AVCH4T245RGYRG4 includes active bus-hold circuitry on all A- and B-port inputs, which maintains valid logic states on undriven or floating lines. External pull-up or pull-down resistors are not recommended and may interfere with bus-hold operation. Unused inputs can be left unconnected, simplifying design and reducing BOM cost.
What is the maximum data rate supported by the 74AVCH4T245RGYRG4, and under what conditions?
The 74AVCH4T245RGYRG4 supports up to 380Mbps when translating from 1.8V to 3.3V. Other configurations deliver 200Mbps (<1.8V→3.3V or →2.5V/1.8V), 150Mbps (→1.5V), and 100Mbps (→1.2V). These rates are validated across –40°C to +85°C and reflect guaranteed timing margins under specified load and voltage conditions per TI's SCES577F datasheet.
Is the 74AVCH4T245RGYRG4 pin-compatible with other members of the SN74AVCH4T245 family?
Yes, the 74AVCH4T245RGYRG4 shares identical pinout and function mapping with all SN74AVCH4T245 variants in SOIC (D), TSSOP (PW), TVSOP (DGV), UQFN (RSV), and VQFN (RGY) packages. Pin assignments - including VCCA (pin 1), 1DIR (pin 2), 2DIR (pin 3), 1A1 (pin 4), etc. - are consistent across all orderable part numbers, enabling drop-in replacement across package types without layout changes.
74AVCH4T245RGYRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCH
- Package/Case:
- 16-VFQFN Exposed Pad
- 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-VQFN (4x3.5)
74AVCH4T245RGYRG4 FAQ
1.How can I place an order for 74AVCH4T245RGYRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVCH4T245RGYRG4 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 74AVCH4T245RGYRG4 reliable?
The price and inventory of 74AVCH4T245RGYRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVCH4T245RGYRG4 is usually 5 days.
3.What payment methods are accepted for 74AVCH4T245RGYRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVCH4T245RGYRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AVCH4T245RGYRG4?
74AVCH4T245RGYRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVCH4T245RGYRG4 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 74AVCH4T245RGYRG4?
For technical support, including 74AVCH4T245RGYRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVCH4T245RGYRG4 requirements.
6.How does Aetrix verify that 74AVCH4T245RGYRG4 is sourced from the original manufacturer or authorized distributors?
All 74AVCH4T245RGYRG4 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 74AVCH4T245RGYRG4 meets industry standards.
7.What is the process for return or replacement of 74AVCH4T245RGYRG4?
All 74AVCH4T245RGYRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVCH4T245RGYRG4, 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 74AVCH4T245RGYRG4 part is unused and in its original packaging.
Return procedure for 74AVCH4T245RGYRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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