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Texas Instruments 74AVCH4T245RSVR-NT
- Part No.:
- 74AVCH4T245RSVR-NT
- Manufacturer:
- Texas Instruments
- Package:
- 16-UFQFN
- Datasheet:
-
74AVCH4T245RSVR-NT.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,453
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Product details
Overview
74AVCH4T245RSVR-NT from Texas Instruments is a 4-bit dual-supply bus transceiver enabling bidirectional voltage-level translation between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V domains. It features independent VCCA (1.2–3.6V) and VCCB (1.2–3.6V) rails, 4.6V I/O tolerance, bus-hold circuitry, and Ioff partial-power-down support. It is used in low-voltage interconnects between mixed-voltage SoCs, FPGAs, and peripheral interfaces.
For engineers reviewing the 74AVCH4T245RSVR-NT datasheet, 74AVCH4T245RSVR-NT pinout, 74AVCH4T245RSVR-NT application, or 74AVCH4T245RSVR-NT equivalent, key selection criteria include configurable dual-rail operation, 380Mbps max data rate (1.8V→3.3V), 16-pin UQFN package (2.6mm × 1.8mm), Ioff-enabled isolation, and bus-hold elimination of external bias resistors.
Technical Context
The 74AVCH4T245RSVR-NT implements a fully asynchronous, direction-controlled bidirectional translation architecture with two independent 2-bit sections. Each section uses DIR to select data flow direction (A→B or B→A) and OE to enable/disable outputs into high-impedance state. Control inputs (1DIR, 2DIR, 1OE, 2OE) are referenced to VCCA.
VCC isolation ensures both ports enter high-Z when either VCCA or VCCB falls below ~0.4V. Bus-hold circuitry actively sustains undriven A/B port inputs at valid logic levels without external resistors, with IBHL/IBHH currents ranging from ±15 µA (1.4V) to ±100 µA (3.0V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V each - enables universal translation among 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 embedded systems |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage legacy signals without clamping diodes |
| Ioff Current | ±5 µA max - prevents backflow current during partial power-down, protecting powered-down subsystems |
| Bus-Hold Current | ±25 µA to ±100 µA (VCC-dependent) - eliminates need for external pull resistors on floating data lines |
| ESD Rating | ±8000V HBM - meets industrial-grade robustness requirements for board-level handling |
| Operating Temp | –40°C to +85°C - qualified for extended-temperature industrial and automotive cabin applications |
Pinout & Package
74AVCH4T245RSVR-NT is packaged in a 16-pin UQFN (RSV) measuring 2.6mm × 1.8mm with 0.4mm pitch and wettable flanks for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output-enable control (active-low) | Referenced to VCCA; high = 3-state on respective port pair; enables hot-swap isolation |
| 1DIR, 2DIR | Direction-control input (active-high) | Referenced to VCCA; high = A→B data flow, low = B→A data flow per 2-bit section |
| 1A1, 1A2, 2A1, 2A2 | A-port I/Os | Referenced to VCCA; support 1.2–3.6V logic; include bus-hold and Ioff protection |
| 1B1, 1B2, 2B1, 2B2 | B-port I/Os | Referenced to VCCB; support 1.2–3.6V logic; 4.6V tolerant regardless of VCCB level |
| VCCA | A-port supply | Power rail for A-side I/Os and all control inputs; sets VIH/VIL thresholds for DIR/OE |
| VCCB | B-port supply | Power rail for B-side I/Os only; independent of VCCA, enabling true dual-voltage operation |
| GND (pins 10, 11) | Ground reference | Dual ground connections improve noise immunity and thermal dissipation in compact UQFN layout |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent 1.2–3.6V VCCA and VCCB rails allow simultaneous operation across five standard low-voltage domains |
| Integrated bus-hold | Active input retention eliminates external pull-up/pull-down resistors, reducing BOM count and PCB area |
| Ioff partial-power-down | Disables output circuits when VCCA or VCCB = 0V, preventing back-current damage during system sleep states |
| VCC isolation | Automatic high-Z on both ports if either VCCA or VCCB drops below ~0.4V - critical for safe power sequencing |
| 4.6V I/O tolerance | Enables connection to 5V-tolerant peripherals without level-shifter cascading or external clamping |
Applications
| Mobile Baseband Interface | FPGA-to-Peripheral Bridging |
|---|---|
Use Scenario: Interfacing a 1.2V mobile application processor with a 3.3V display timing controller in smartphone display subsystems. IC Role / Device Role / Timing Role: Bidirectional level translator managing command/data flow between processor and display IC across voltage domains. Use Value: Eliminates need for discrete resistor networks or multiple single-channel translators, reducing footprint by >40% vs. alternative solutions. | Use Scenario: Connecting a 1.8V FPGA I/O bank to 2.5V DDR2 memory or 3.3V UART peripherals in industrial control modules. IC Role / Device Role / Timing Role: Configurable bus transceiver providing synchronous, direction-controlled data transfer with sub-3ns propagation delay. Use Value: Supports 380Mbps throughput (1.8V→3.3V), enabling real-time sensor data aggregation without bottlenecking FPGA bandwidth. |
| Automotive Infotainment Hub | IoT Sensor Aggregation Node |
Use Scenario: Linking a 1.5V microcontroller unit (MCU) to 2.5V CAN transceivers and 3.3V audio codecs in vehicle head-unit designs. IC Role / Device Role / Timing Role: Dual-section voltage translator isolating MCU I/Os while supporting concurrent CAN and audio signal routing. Use Value: Ioff and VCC isolation ensure safe power-down of MCU without disrupting CAN bus integrity or codec biasing. | Use Scenario: Enabling communication between a 1.2V ultra-low-power sensor node MCU and 1.8V wireless SoC in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-quiescent translator maintaining signal integrity during intermittent wake/sleep cycles with bus-hold preserving bus state. Use Value: Bus-hold sustains valid logic levels during MCU sleep, avoiding spurious interrupts and eliminating wake-up initialization delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4T245RTER | Single-supply (1.65–3.6V), no VCCA/VCCB separation; lower max speed (240Mbps); no Ioff | Suitable only for same-voltage-domain buffering or simpler 3.3V↔1.8V cases without partial-power-down needs | Select when cost sensitivity outweighs dual-rail flexibility and Ioff is unnecessary |
| TXS0104ERUKR | Auto-direction sensing (no DIR pins); lower drive strength (±8mA); supports 1.2V–3.6V but lacks bus-hold | Better for point-to-point I²C/SPI where direction is predictable; unsuitable for bidirectional parallel buses requiring explicit DIR control | Select for space-constrained I²C level shifting where DIR pin count must be minimized |
Compared with SN74LVC4T245RTER and TXS0104ERUKR, the 74AVCH4T245RSVR-NT uniquely combines independent dual-rail supplies, Ioff, bus-hold, and 380Mbps performance - making it the only choice for robust, mixed-voltage parallel bus translation with power-aware sequencing.
Availability
74AVCH4T245RSVR-NT is available at Aetrix Electronics and suitable for mobile baseband interfaces, FPGA-to-peripheral bridging, automotive infotainment hubs, and IoT sensor aggregation nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AVCH4T245RSVR-NT 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 AVC logic family - including the 74AVCH4T245RSVR-NT - was designed specifically for low-voltage, high-speed bidirectional level translation in space-constrained, power-sensitive applications such as portable computing and advanced driver-assistance systems.
FAQ
What voltage ranges does the 74AVCH4T245RSVR-NT support on its A and B ports?
The 74AVCH4T245RSVR-NT supports independent supply voltages from 1.2V to 3.6V 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 operational even when VCCA and VCCB are set to different voltages within this range, and the 74AVCH4T245RSVR-NT's I/Os tolerate up to 4.6V regardless of rail setting.
Does the 74AVCH4T245RSVR-NT require external pull-up or pull-down resistors on its data lines?
No, the 74AVCH4T245RSVR-NT integrates active bus-hold circuitry on all A- and B-port inputs, which maintains undriven or floating data lines at valid logic HIGH or LOW states. Texas Instruments explicitly advises against using external pull-up or pull-down resistors with the 74AVCH4T245RSVR-NT, as they conflict with bus-hold operation and may increase power consumption or cause signal integrity issues.
How does the Ioff feature function in the 74AVCH4T245RSVR-NT during partial power-down?
The Ioff feature in the 74AVCH4T245RSVR-NT disables the output drivers when either VCCA or VCCB is at 0V, preventing damaging backflow current through the device. Measured at ≤±5 µA, this leakage suppression protects powered subsystems during controlled power sequencing - for example, when an FPGA powers down while a peripheral remains active. This behavior is confirmed in Section 5.5 of the 74AVCH4T245RSVR-NT datasheet under the Ioff parameter.
What is the maximum data rate supported by the 74AVCH4T245RSVR-NT, and under what conditions?
The 74AVCH4T245RSVR-NT supports up to 380Mbps when translating signals from 1.8V to 3.3V, as specified in Section 1 of the datasheet. Lower rates apply for other combinations: 200Mbps for <1.8V→3.3V or ↔2.5V/1.8V, 150Mbps for ↔1.5V, and 100Mbps for ↔1.2V. These values reflect guaranteed switching performance under recommended operating conditions and are validated across the full –40°C to +85°C temperature range.
Can the 74AVCH4T245RSVR-NT be used in hot-swap or live-insertion applications?
Yes - the 74AVCH4T245RSVR-NT supports hot-swap operation via its VCC isolation and Ioff features. If either VCCA or VCCB is at GND (or <0.4V), both ports automatically enter high-impedance mode, preventing false logic assertion or current injection into live backplanes. Combined with 4.6V I/O tolerance and ±8000V HBM ESD rating, the 74AVCH4T245RSVR-NT is suitable for modular systems requiring field-replaceable cards or dynamic voltage domain insertion.
74AVCH4T245RSVR-NT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCH
- Package/Case:
- 16-UFQFN
- 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:
- 0.8V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-UQFN (2.6x1.8)
74AVCH4T245RSVR-NT FAQ
1.How can I place an order for 74AVCH4T245RSVR-NT through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AVCH4T245RSVR-NT 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 74AVCH4T245RSVR-NT reliable?
The price and inventory of 74AVCH4T245RSVR-NT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AVCH4T245RSVR-NT is usually 5 days.
3.What payment methods are accepted for 74AVCH4T245RSVR-NT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AVCH4T245RSVR-NT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AVCH4T245RSVR-NT?
74AVCH4T245RSVR-NT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AVCH4T245RSVR-NT 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 74AVCH4T245RSVR-NT?
For technical support, including 74AVCH4T245RSVR-NT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AVCH4T245RSVR-NT requirements.
6.How does Aetrix verify that 74AVCH4T245RSVR-NT is sourced from the original manufacturer or authorized distributors?
All 74AVCH4T245RSVR-NT 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 74AVCH4T245RSVR-NT meets industry standards.
7.What is the process for return or replacement of 74AVCH4T245RSVR-NT?
All 74AVCH4T245RSVR-NT units undergo pre-shipment inspection (PSI). If there is an issue with 74AVCH4T245RSVR-NT, 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 74AVCH4T245RSVR-NT part is unused and in its original packaging.
Return procedure for 74AVCH4T245RSVR-NT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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