My Inquiry
My Account
Texas Instruments SN74AVC4T245RGYR
- Part No.:
- SN74AVC4T245RGYR
- Manufacturer:
- Texas Instruments
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
SN74AVC4T245RGYR.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:23,781
Please send an inquiry. Send us your inquiry, and we will respond immediately.
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 is used in mixed-voltage system interconnects such as SoC-to-peripheral interfaces.
For engineers reviewing the SN74AVC4T245 datasheet, SN74AVC4T245 pinout, SN74AVC4T245 application, or SN74AVC4T245 equivalent, key selection criteria include dual-rail configurability, 3-state output control per channel, Ioff-enabled isolation during power sequencing, and verified 380Mbps translation performance at 1.8V→3.3V.
Technical Context
The SN74AVC4T245 implements two independent 2-bit bidirectional channels, each with dedicated DIR and OE controls referenced to VCCA. Its dual-rail architecture decouples A-port (VCCA-referenced) and B-port (VCCB-referenced) logic levels, enabling asynchronous translation without clocking or direction latching.
Each channel supports four functional states: A→B transmission (DIR=H, OE=L), B→A transmission (DIR=L, OE=L), high-impedance isolation (OE=H), and powered-down isolation (Ioff active when either VCCA or VCCB = 0V). Input circuits remain always-active to prevent floating-node leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA/VCCB) | 1.2V to 3.6V - enables translation across all common low-voltage nodes (1.2V/1.5V/1.8V/2.5V/3.3V) without external level-shifting circuitry |
| Max Data Rate | 380Mbps (1.8V→3.3V) - supports high-speed interface bridging for USB, SDIO, or parallel memory buses |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage legacy peripherals while operating at 1.2V–3.3V core logic |
| Ioff Current | ±0.1μA (max) - prevents backflow current during partial power-down, critical for hot-swap and power-gated subsystems |
| ESD Protection | 8kV HBM, 150V MM, 1kV CDM - meets industrial-grade robustness requirements for board-level handling and field operation |
| Propagation Delay | 2.6ns (min, VCCA=3.3V→VCCB=2.5V) - ensures timing-critical signal integrity in real-time control and data acquisition paths |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial and automotive under-hood applications |
Pinout & Package
SN74AVC4T245RGYR uses a 16-pin WQFN package (4mm × 3.5mm) with exposed thermal pad. Pin numbering follows standard top-view orientation; VCCA and VCCB are separate supply inputs, and each channel has independent DIR/OE controls.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction-control input (per channel) | Referenced to VCCA; high = A→B data flow, low = B→A data flow - enables independent bidirectional control per 2-bit lane |
| 1OE, 2OE | Output-enable input (per channel) | Referenced to VCCA; low = outputs enabled, high = 3-state - provides per-channel isolation for bus arbitration and multiplexing |
| 1A1, 1A2, 2A1, 2A2 | A-port I/O (VCCA-referenced) | Input/output pins tied to VCCA rail - accept 1.2–3.6V logic and drive compatible loads on A-side bus |
| 1B1, 1B2, 2B1, 2B2 | B-port I/O (VCCB-referenced) | Input/output pins tied to VCCB rail - translate and drive signals on B-side bus at its native voltage domain |
| VCCA | A-port power supply | Supplies A-port I/Os and all control inputs (DIR/OE); sets VIH/VIL thresholds for control logic |
| VCCB | B-port power supply | Supplies B-port I/Os only; determines output swing and input threshold on B side |
| GND | Ground reference | Common return path for both power domains; required for stable noise margin and ESD discharge path |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 2-bit channels | Enables concurrent A↔B translation on two separate data lanes - eliminates need for two discrete transceivers in multi-bus systems |
| VCCA-referenced control inputs | DIR/OE thresholds track VCCA, ensuring reliable control even when VCCB is unpowered or at different voltage - simplifies power sequencing |
| Ioff-enabled partial power-down | Disables I/O output circuits when VCCA or VCCB = 0V, blocking damaging back-current - essential for hot-plug and dynamic power gating |
| VCC isolation | Both ports enter high-impedance state if either VCCA or VCCB is at GND - prevents bus contention during asymmetric power-up/down |
| 4.6V-tolerant I/Os | Allows connection to 5V-tolerant peripherals without external clamping - reduces BOM count and PCB area in mixed-voltage designs |
Applications
| Mobile SoC Interconnect | Industrial PLC I/O Module |
|---|---|
Use Scenario: Bridging a 1.2V application processor to a 3.3V sensor hub or display interface. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing data flow between mismatched logic domains with per-lane direction control. Use Value: Eliminates need for discrete level shifters and reduces latency versus open-drain solutions - enables direct push-pull signaling at up to 380Mbps. |
Use Scenario: Isolating 2.5V FPGA configuration logic from 3.3V fieldbus transceivers in modular I/O cards. IC Role / Device Role / Timing Role: Dual-rail transceiver providing galvanically isolated signal translation with Ioff protection during module hot-swap. Use Value: Prevents backfeed into unpowered FPGA banks during insertion - meets IEC 61000-4-2 ESD immunity requirements. |
| Enterprise SSD Controller Interface | Automotive ADAS Camera Link |
Use Scenario: Connecting a 1.8V NVMe controller to 3.3V PCIe PHY or flash memory buffers. IC Role / Device Role / Timing Role: High-speed bidirectional translator supporting burst-mode data transfers with sub-3ns propagation delay. Use Value: Maintains signal integrity at 380Mbps with <2.8ns tPLH/tPHL - avoids timing closure issues in high-bandwidth storage interfaces. |
Use Scenario: Level-shifting MIPI CSI-2 D-PHY signals between a 1.2V image sensor and 1.5V SoC receiver. IC Role / Device Role / Timing Role: Low-voltage translator preserving edge rates and minimizing jitter in high-frequency serial video links. Use Value: Supports 1.5Gbps per lane with <3.6ns max tPLH/tPHL at 1.2V→1.5V - meets MIPI D-PHY v1.2 timing budgets. |
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 asymmetric power-down scenarios | Select when cost is primary and both sides operate at identical voltage with no partial-power-down requirement |
| TXS0104EPWR | Auto-direction sensing, no DIR pin; lower drive strength (8mA vs 12mA), 100Mbps max | Eliminates direction-control wiring but adds propagation delay uncertainty; not suitable for deterministic full-duplex protocols | Select for simple uni-directional or auto-sensed data paths where direction changes infrequently and speed <100Mbps suffices |
Compared with SN74LVC4T245PW and TXS0104EPWR, the SN74AVC4T245RGYR uniquely delivers dual-rail configurability, 380Mbps performance, and Ioff-enabled power sequencing - making it the only option for high-speed, mixed-voltage, hot-pluggable system interconnects requiring per-channel control.
Availability
SN74AVC4T245RGYR is available at Aetrix Electronics and suitable for mobile SoC interconnect, industrial PLC I/O modules, enterprise SSD controllers, and automotive ADAS camera links requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SN74AVC4T245RGYR 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 company delivering analog and embedded processing solutions, with leadership in precision analog, power management, and high-performance logic.
The SN74AVC4T245 belongs to TI's AVC (Advanced Very-Low-Voltage CMOS) logic family, designed specifically for ultra-low-voltage bidirectional translation in space-constrained, power-sensitive applications such as portable electronics and multi-rail embedded systems.
FAQ
What voltage ranges does the SN74AVC4T245RGYR support on its A and B ports?
The SN74AVC4T245RGYR 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. This range is validated across –40°C to +85°C and includes guaranteed operation down to 1.2V, unlike many competing translators that specify minimums above 1.4V.
How does the Ioff feature function in the SN74AVC4T245RGYR during partial power-down?
The Ioff feature in the SN74AVC4T245RGYR disables output driver circuits when either VCCA or VCCB is at 0V, limiting Ioff current to ±0.1μA (max). This prevents damaging back-current flow from a powered rail into an unpowered one - a critical capability for hot-swap modules, battery-backed subsystems, and dynamically powered FPGA I/O banks.
Can the SN74AVC4T245RGYR translate signals from 1.2V to 3.3V, and what is its maximum data rate at that voltage pair?
Yes, the SN74AVC4T245RGYR fully supports 1.2V-to-3.3V translation. At this voltage pair, its maximum data rate is 100Mbps, as specified in the switching characteristics tables (Section 5.7). Performance is characterized across temperature and process corners, with typical tPLH/tPHL ≤2.9ns at VCCA=1.2V, VCCB=3.3V, TA=25°C.
What is the purpose of the VCC isolation feature in the SN74AVC4T245RGYR?
The VCC isolation feature ensures that if either VCCA or VCCB is driven to GND, both A-port and B-port outputs automatically enter high-impedance state - regardless of DIR or OE states. This prevents bus contention and latch-up during asymmetric power-up sequences, making the SN74AVC4T245RGYR suitable for systems with staggered rail enablement.
Is the SN74AVC4T245RGYR pin-compatible with other packages in the SN74AVC4T245 family?
No - the SN74AVC4T245RGYR (WQFN, 4mm × 3.5mm) has a unique pinout optimized for its RGY package. While electrical functionality is identical across SN74AVC4T245 variants, mechanical compatibility requires matching the specific package: RGY (WQFN), RSV (UQFN), PW (TSSOP), or D (SOIC). Layout must be verified per TI's Mechanical, Packaging, and Orderable Information (Section 11).
SN74AVC4T245RGYR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- 16-VFQFN Exposed Pad
- 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-VQFN (4x3.5)
SN74AVC4T245RGYR FAQ
1.How can I place an order for SN74AVC4T245RGYR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC4T245RGYR 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 SN74AVC4T245RGYR reliable?
The price and inventory of SN74AVC4T245RGYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC4T245RGYR is usually 5 days.
3.What payment methods are accepted for SN74AVC4T245RGYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVC4T245RGYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AVC4T245RGYR?
SN74AVC4T245RGYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC4T245RGYR 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 SN74AVC4T245RGYR?
For technical support, including SN74AVC4T245RGYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC4T245RGYR requirements.
6.How does Aetrix verify that SN74AVC4T245RGYR is sourced from the original manufacturer or authorized distributors?
All SN74AVC4T245RGYR 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 SN74AVC4T245RGYR meets industry standards.
7.What is the process for return or replacement of SN74AVC4T245RGYR?
All SN74AVC4T245RGYR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC4T245RGYR, 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 SN74AVC4T245RGYR part is unused and in its original packaging.
Return procedure for SN74AVC4T245RGYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AVC4T245RGYR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
