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Texas Instruments 74AVC4T774RGYRG4
- Part No.:
- 74AVC4T774RGYRG4
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74AVC4T774RGYRG4.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 16VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
74AVC4T774RGYRG4 from Texas Instruments is a 4-bit dual-supply bus transceiver enabling bidirectional voltage-level translation between independent 1.1V–3.6V rails (VCCA and VCCB), with per-channel DIR control, 3-state outputs, and 4.6V I/O tolerance. It supports up to 380Mbps (1.8V→3.3V), features Ioff for partial power-down, and operates across industrial temperature range (–40°C to 85°C). Used in MCU-to-peripheral SPI interface bridging.
For engineers reviewing the 74AVC4T774RGYRG4 datasheet, 74AVC4T774RGYRG4 pinout, 74AVC4T774RGYRG4 application, or 74AVC4T774RGYRG4 equivalent, key selection criteria include per-channel direction control, dual-rail supply flexibility (1.1V–3.6V), guaranteed 380Mbps data rate at 1.8V→3.3V translation, Ioff-enabled isolation during power sequencing, and VQFN-16 (RGY) package thermal performance (RθJA = 68.8°C/W).
Technical Context
The 74AVC4T774RGYRG4 implements four independent CMOS bidirectional channels, each with dedicated DIR input referenced to VCCA and shared OE referenced to VCCA. Signal flow direction (A→B or B→A) is controlled per channel via DIRx, while OE globally enables/disables all outputs into high-impedance state. Both A-port (VCCA-referenced) and B-port (VCCB-referenced) I/Os remain active regardless of direction or enable state.
Its dual-rail architecture decouples logic thresholds and drive strength: VIH/VIL for DIR/OE are defined relative to VCCA; VOH/VOL swing relative to respective VCCA or VCCB; and Ioff circuitry disables output drivers when either VCCA or VCCB is at 0V, preventing backflow current. The device meets JESD78 Class II latch-up (>100mA) and JESD22 ESD ratings (±8kV HBM, ±1.5kV CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.1V to 3.6V - Enables translation between any combination of 1.2V/1.5V/1.8V/2.5V/3.3V nodes without external level-shifting components. |
| Max Data Rate | 380Mbps (1.8V→3.3V) - Supports high-speed SPI, I²C, and parallel bus interfaces requiring sub-3ns propagation delay (tPLH/tPHL ≤ 4.2ns typical at 3.3V). |
| I/O Voltage Tolerance | 4.6V - Allows safe interfacing with legacy 3.3V or 5V systems without clamping diodes or external protection. |
| Ioff Current | ±0.1µA (max) - Ensures zero-current backflow during partial power-down, critical for hot-swap and power-gated subsystems. |
| ESD Protection | ±8000V HBM - Meets stringent electrostatic discharge immunity requirements for handheld and industrial equipment assembly. |
| Operating Temperature | –40°C to +85°C - Qualified for automotive infotainment, industrial PLC, and telecom infrastructure applications. |
| Package Thermal Resistance | RθJA = 68.8°C/W (VQFN-16) - Enables sustained 380Mbps operation without forced airflow in compact PCB layouts. |
Pinout & Package
VQFN-16 (RGY) package: 4mm × 3.5mm body, 0.5mm pitch, exposed thermal pad. Pin 1 marked by top-side dot; pins numbered counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR1–DIR4 | Direction-control input (VCCA-referenced) | Per-channel control: HIGH enables A→B data flow; LOW enables B→A flow - eliminates need for external multiplexers in asymmetric bus topologies. |
| A1–A4 | A-port I/O (VCCA-referenced) | Connects to low-voltage controller side (e.g., 1.8V MCU GPIO); must be terminated to VCCA or GND to prevent floating-induced ICCZ leakage. |
| B1–B4 | B-port I/O (VCCB-referenced) | Connects to peripheral side (e.g., 3.3V SPI flash); tolerant up to 4.6V, allowing direct connection to 3.3V supplies with margin. |
| OE | Output-enable input (VCCA-referenced) | Pull HIGH to place all A/B outputs in high-impedance - required for clean power-up sequencing; tie to VCCA via pullup resistor. |
| VCCA / VCCB | Independent supply rails | VCCA powers DIR/OE inputs and A-port drivers; VCCB powers B-port drivers - enables true dual-voltage domain isolation. |
| GND | Ground reference | Single ground plane required; no separate analog/digital GND - simplifies layout in space-constrained designs. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel DIR control | Enables mixed-direction data flow on same transceiver (e.g., A1→B1 for command, B2→A2 for status) without external logic. |
| 4.6V I/O tolerance | Eliminates need for external clamping diodes when interfacing with 3.3V peripherals, reducing BOM cost and board area. |
| Ioff partial-power-down | Prevents damaging current backflow when VCCA or VCCB is unpowered - essential for modular systems with staggered rail sequencing. |
| VQFN-16 thermal performance | RθJA = 68.8°C/W allows full-speed operation at 85°C ambient without heatsink - ideal for fanless edge computing modules. |
| CMOS input stability | Requires all unused A/B inputs tied to VCCI or GND - prevents excessive ICC and ensures deterministic logic states during sleep modes. |
Applications
| MCU-to-SPI Flash Interface | Multi-Voltage Sensor Hub |
|---|---|
|
Use Scenario: Interfacing a 1.8V ARM Cortex-M4 microcontroller with a 3.3V SPI NOR flash memory in an industrial data logger. IC Role / Device Role: Bidirectional level translator for SCLK, MOSI, MISO, and CS signals, with DIR1–DIR4 configured for fixed A→B (MOSI/CS) and B→A (MISO) paths. Use Value: Eliminates four discrete level shifters; supports 380Mbps read bursts; Ioff prevents flash corruption during MCU reset sequences. |
Use Scenario: Aggregating I²C sensors operating at 1.2V (accelerometer), 1.8V (humidity), and 2.5V (temperature) onto a 3.3V host processor bus. IC Role / Device Role: Voltage-domain bridge enabling simultaneous multi-node communication without bus contention or voltage conflict. Use Value: Single-chip solution replaces three discrete translators; 4.6V tolerance protects against 3.3V host overvoltage; RθJA = 68.8°C/W sustains operation in sealed enclosures. |
| Hot-Swappable Module Backplane | Low-Power Wearable Subsystem |
|
Use Scenario: Level translation between a 2.5V mainboard and 1.5V hot-plug peripheral module in telecom baseband processing. IC Role / Device Role: Isolation enabler during insertion/removal - Ioff disables outputs when VCCA/VCCB ramps asynchronously. Use Value: Prevents bus glitches and data corruption during live module swap; ±8kV HBM withstands handling ESD in field service environments. |
Use Scenario: Connecting a 1.2V ultra-low-power Bluetooth SoC to 1.8V display driver and 3.3V RF front-end in a hearable device. IC Role / Device Role: Power-aware bidirectional bridge - OE tied to SoC's power-good signal to gate translation only during active mode. Use Value: Reduces standby current to <1µA via Ioff; 3.5mm × 4mm VQFN footprint fits within 8mm × 8mm wearable PCB constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC4T245RGYR | Fixed-direction (DIR common to all 4 channels), no per-channel DIR control; identical VCCA/VCCB range and 380Mbps rating. | Suitable only where all 4 channels translate in same direction (e.g., unidirectional address/data buses); cannot support mixed A→B/B→A on same device. | Select 74AVC4T774RGYRG4 when per-channel direction flexibility is required; choose SN74AVC4T245RGYR for cost-sensitive unidirectional use cases. |
| TXS0104ERGYR | Auto-direction sensing (no DIR inputs), lower max speed (60Mbps), higher propagation delay (tPLH up to 15ns), no Ioff support. | Applicable only for low-speed, low-power I²C/SMBus where direction is inferred from bus activity - not suitable for high-speed SPI or deterministic control. | 74AVC4T774RGYRG4 is mandatory for >100Mbps applications or systems requiring explicit direction control and Ioff-based isolation. |
Compared with SN74AVC4T245RGYR and TXS0104ERGYR, the 74AVC4T774RGYRG4 uniquely delivers per-channel DIR control, 380Mbps capability, and Ioff-enabled power sequencing - making it the only option for high-speed, mixed-direction, hot-swap-critical designs in compact VQFN packaging.
Availability
74AVC4T774RGYRG4 is available at Aetrix Electronics and suitable for industrial automation controllers, medical sensor hubs, and telecom baseband modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized Texas Instruments distribution channels.
Supply support for 74AVC4T774RGYRG4 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 solutions, with decades of expertise in precision timing, signal chain, and power management ICs.
The SN74AVC4T774 product line targets low-voltage, high-speed digital interface bridging in space-constrained, thermally demanding applications - designed specifically for seamless interoperability between heterogeneous voltage domains in modern embedded systems.
FAQ
What is the maximum supported data rate for 74AVC4T774RGYRG4 in a 1.8V-to-3.3V translation configuration?
The 74AVC4T774RGYRG4 supports up to 380Mbps when translating from 1.8V (VCCA) to 3.3V (VCCB), as verified in TI's SCES693I datasheet Section 5.6–5.10 switching characteristics. This performance is enabled by sub-4ns propagation delays (tPLH/tPHL) and optimized CMOS output drivers. The 74AVC4T774RGYRG4 maintains this rate across the full –40°C to +85°C operating range with appropriate load conditions (CL = 15pF, RL = 2kΩ).
How does the Ioff feature function in 74AVC4T774RGYRG4 during partial power-down scenarios?
The Ioff feature in the 74AVC4T774RGYRG4 disables all output drivers when either VCCA or VCCB is at 0V, limiting Ioff current to ±0.1µA (max) as specified in Section 5.5 Electrical Characteristics. This prevents damaging backflow current from a powered rail into an unpowered one - critical for hot-swap modules and systems with staggered power sequencing. The 74AVC4T774RGYRG4 achieves this via internal circuitry that isolates I/O transistors when supply voltage drops below threshold.
Can 74AVC4T774RGYRG4 safely interface with 5V logic systems?
No - the 74AVC4T774RGYRG4 is not rated for 5V operation. Its absolute maximum I/O voltage is 4.6V (Section 5.1 Absolute Maximum Ratings), and recommended operating VCCA/VCCB range is strictly 1.1V–3.6V. While 4.6V tolerance provides margin above standard 3.3V systems, direct connection to 5V buses risks permanent damage. For 5V interfacing, a purpose-built 5V-tolerant translator such as the SN74LVC8T245 must be used instead of the 74AVC4T774RGYRG4.
What is the correct power-up sequence for reliable operation of 74AVC4T774RGYRG4?
To ensure glitch-free startup, OE must be held HIGH (via pullup to VCCA) until both VCCA and VCCB are fully ramped and stable. TI recommends using a minimum pullup resistor value determined by the driver's current-sinking capability (Section 7.4 Device Functional Modes). All unused A/B inputs must be tied to VCCI or GND - floating CMOS inputs cause excessive ICC and unpredictable logic states. The 74AVC4T774RGYRG4 requires no special reset sequence beyond this OE and input biasing discipline.
Does 74AVC4T774RGYRG4 support mixed voltage translation across all four channels simultaneously?
Yes - the 74AVC4T774RGYRG4 supports independent voltage translation per channel: DIR1–DIR4 allow A1↔B1, A2↔B2, A3↔B3, and A4↔B4 to operate at different VCCA/VCCB combinations simultaneously. For example, A1/B1 can translate 1.2V↔2.5V while A2/B2 handles 1.8V↔3.3V, provided both VCCA and VCCB remain within 1.1V–3.6V. This per-channel flexibility is unique to the 74AVC4T774RGYRG4 and is not available in fixed-direction alternatives like SN74AVC4T245RGYR.
74AVC4T774RGYRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 4
- Voltage - VCCA:
- 1.1 V ~ 3.6 V
- Voltage - VCCB:
- 1.1 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- 380Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VFQFN Exposed Pad
74AVC4T774RGYRG4 FAQ
1.How can I place an order for 74AVC4T774RGYRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVC4T774RGYRG4 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 74AVC4T774RGYRG4 reliable?
The price and inventory of 74AVC4T774RGYRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVC4T774RGYRG4 is usually 5 days.
3.What payment methods are accepted for 74AVC4T774RGYRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVC4T774RGYRG4 transactions.
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4.How is shipping managed for 74AVC4T774RGYRG4?
74AVC4T774RGYRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVC4T774RGYRG4 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 74AVC4T774RGYRG4?
For technical support, including 74AVC4T774RGYRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVC4T774RGYRG4 requirements.
6.How does Aetrix verify that 74AVC4T774RGYRG4 is sourced from the original manufacturer or authorized distributors?
All 74AVC4T774RGYRG4 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 74AVC4T774RGYRG4 meets industry standards.
7.What is the process for return or replacement of 74AVC4T774RGYRG4?
All 74AVC4T774RGYRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74AVC4T774RGYRG4, 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 74AVC4T774RGYRG4 part is unused and in its original packaging.
Return procedure for 74AVC4T774RGYRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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