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Texas Instruments SN74AVC4T245D
- Part No.:
- SN74AVC4T245D
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74AVC4T245D.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:422
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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 serves in mixed-voltage interconnects between processors and peripherals.
For engineers reviewing the SN74AVC4T245 datasheet, SN74AVC4T245 pinout, SN74AVC4T245 application, or SN74AVC4T245 equivalent, key selection criteria include dual-rail configurability, direction-control logic referencing VCCA, 3-state output enable timing, Ioff current limits (<5µA), and thermal metrics such as RθJA = 68.8°C/W (RGY package).
Technical Context
The SN74AVC4T245 implements two independent 2-bit bidirectional channels, each with dedicated DIR and OE inputs referenced to VCCA. Its dual-rail architecture isolates A-port (VCCA-referenced) and B-port (VCCB-referenced) signal paths, enabling simultaneous operation across mismatched supply domains without level-shifter ICs.
Functional mode control relies on synchronous OE/DIR logic: OE = L enables one port while placing the other in high-Z; OE = H forces both ports into high-Z regardless of DIR state. The Ioff circuitry ensures <5µA leakage when either VCCA or VCCB = 0V, supporting safe partial power-down in hot-swap or sleep-mode systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V - supports universal translation among 1.2V/1.5V/1.8V/2.5V/3.3V nodes without external biasing |
| Max Data Rate | 380Mbps (1.8V→3.3V) - enables high-speed interface bridging for USB, PCIe, or memory subsystems |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage legacy components without clamping diodes |
| Ioff Leakage | <5µA at 0V supply - prevents backflow current during partial power-down, critical for system-level energy management |
| ESD Rating | 8kV HBM - meets industrial-grade robustness requirements for board-level handling and field deployment |
| Propagation Delay | 2.6ns (VCCA=3.3V, VCCB=2.5V) - ensures timing closure in sub-ns-critical digital interfaces |
| Operating Temp | –40°C to +85°C - qualified for extended industrial temperature environments |
Pinout & Package
SN74AVC4T245 is available in multiple 16-pin packages including SOIC (D), TVSOP (DGV), TSSOP (PW), WQFN (RGY, BQB), UQFN (RSV), and SOT (DYY). The RGY package measures 4mm × 3.5mm with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per channel) | Referenced to VCCA; high enables A→B data flow, low enables B→A flow |
| 1OE, 2OE | Output-enable input (per channel) | Referenced to VCCA; low enables outputs, high places port in high-impedance state |
| 1A1–2A2 | A-port I/O pins | Referenced to VCCA; bidirectional data path for 1.2V–3.6V domain A |
| 1B1–2B2 | B-port I/O pins | Referenced to VCCB; bidirectional data path for 1.2V–3.6V domain B |
| VCCA | A-port supply | Powers A-side I/Os and all control inputs (DIR/OE); sets VIH/VIL thresholds |
| VCCB | B-port supply | Powers B-side I/Os only; independent of VCCA for true dual-rail operation |
| GND | Ground reference | Common return for both supply domains; required for proper Ioff and ESD performance |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent VCCA/VCCB rails (1.2–3.6V each) enable any-to-any low-voltage node bridging without external components |
| 4.6V I/O tolerance | Allows connection to 5V-tolerant systems or legacy interfaces while operating at 1.2V–3.3V core voltages |
| Ioff partial-power-down | Disables I/O circuits when VCCA or VCCB = 0V, limiting backflow current to <5µA for safe hot-plug operation |
| VCC isolation | Automatically places both ports in high-Z if either VCCA or VCCB is at GND - prevents contention during power sequencing |
| High-speed switching | 380Mbps max data rate (1.8V→3.3V) supports modern serial protocols like eMMC, SDIO, and low-latency sensor buses |
Applications
| Mobile Processor Interconnect | Industrial PLC I/O Expansion |
|---|---|
Use Scenario: Bridging a 1.8V application processor to a 3.3V peripheral controller in a smartphone or tablet. IC Role / Device Role / Timing Role: Bidirectional level translator managing data flow between CPU and camera/sensor hub with direction control synchronized to data phase. Use Value: Eliminates need for discrete MOSFET-based translators; supports 380Mbps burst transfers while maintaining signal integrity across voltage domains. | Use Scenario: Connecting a 2.5V FPGA I/O bank to 1.2V sensor ADCs and 3.3V actuator drivers in an industrial automation module. IC Role / Device Role / Timing Role: Dual-channel voltage translator enabling concurrent analog-digital and control-signal routing with independent OE/DIR per channel. Use Value: Reduces PCB layer count by consolidating four independent level-shift functions into one 4mm×3.5mm WQFN package with integrated Ioff protection. |
| Enterprise SSD Controller Interface | Telecom Baseband Signal Routing |
Use Scenario: Interfacing a 1.2V NVMe controller ASIC to 1.8V NAND flash memory arrays in enterprise solid-state drives. IC Role / Device Role / Timing Role: High-speed bidirectional translator ensuring sub-3ns propagation delay and precise OE timing for command/address/data multiplexing. Use Value: Enables full-speed 380Mbps operation at 1.2V→1.8V translation, preserving SSD random read/write latency budgets. | Use Scenario: Routing JESD204B serial links between a 1.5V baseband processor and 2.5V RF transceivers in 5G small-cell equipment. IC Role / Device Role / Timing Role: Low-jitter, rail-to-rail translator maintaining signal edge fidelity across mixed-supply signal chains with controlled rise/fall times. Use Value: Provides 4.6V-tolerant I/Os and 8kV HBM ESD rating for reliable operation in electrically noisy telecom environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4T245 | Lower max data rate (240Mbps), no Ioff, VCC range limited to 1.65–3.6V | Suitable for cost-sensitive consumer designs where partial-power-down is not required | Choose when operating exclusively above 1.65V and thermal/power constraints permit higher ICC |
| TXB0104 | Auto-direction sensing (no DIR pin), lower drive strength (±4mA), supports 1.2V–3.6V but lacks 4.6V tolerance | Better for simple push-pull buses without explicit direction control; unsuitable for 5V-tolerant interfaces | Prefer when direction logic is software-managed or when space-constrained layouts benefit from auto-sensing |
Compared with SN74LVC4T245 and TXB0104, the SN74AVC4T245 uniquely combines 380Mbps speed, 4.6V I/O tolerance, and Ioff-enabled partial-power-down - making it the only option for high-reliability, mixed-voltage, hot-pluggable systems requiring guaranteed isolation during supply ramp-up/down.
Availability
SN74AVC4T245 is available at Aetrix Electronics and suitable for mobile processor interconnect, industrial PLC I/O expansion, enterprise SSD controller interface, and telecom baseband signal routing requiring stable component supply across automotive-qualified, industrial, and enterprise-grade production programs.
Supply support for SN74AVC4T245 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 for industrial, automotive, personal electronics, and enterprise applications.
The SN74AVC4T245 belongs to TI's AVC (Advanced Very-low-voltage CMOS) logic family, engineered specifically for ultra-low-voltage bidirectional translation in power-constrained, multi-rail digital systems.
FAQ
What voltage ranges does the SN74AVC4T245 support on its A and B ports?
The SN74AVC4T245 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 full-range dual-rail capability is confirmed in Section 7.3.1 of the datasheet and verified across all recommended operating conditions.
How does the SN74AVC4T245 handle power sequencing when VCCA and VCCB ramp at different rates?
The SN74AVC4T245 incorporates VCC isolation: if either VCCA or VCCB is at GND, both A and B ports automatically enter high-impedance state. This prevents bus contention during asymmetric power-up/down. OE must be tied to VCCA via pullup resistor to ensure high-Z state during initial ramp - a design requirement explicitly stated in Section 8.3.
What is the maximum data rate supported by the SN74AVC4T245, and under what conditions?
The SN74AVC4T245 achieves up to 380Mbps when translating signals from 1.8V to 3.3V, as specified in Section 1 Features and validated in Section 5.7–5.11 switching characteristics tables. Performance degrades to 200Mbps for sub-1.8V translations and 100Mbps when translating to 1.2V, due to reduced noise margins and drive strength.
Does the SN74AVC4T245 support partial-power-down operation, and how is it implemented?
Yes - the SN74AVC4T245 implements Ioff circuitry that disables I/O output circuits when either VCCA or VCCB is at 0V, limiting leakage current to <5µA. This feature is documented in Section 1 Features and Section 7.3.3, and is essential for hot-swap and low-power standby modes in systems with dynamic rail control.
What package options are available for the SN74AVC4T245, and which offers the best thermal performance?
The SN74AVC4T245 is offered in D (SOIC), DGV (TVSOP), PW (TSSOP), RGY (WQFN), RSV (UQFN), BQB (WQFN), and DYY (SOT) packages. The RGY WQFN package delivers the lowest junction-to-ambient thermal resistance at 68.8°C/W (Section 5.4), making it optimal for high-density, thermally constrained applications such as mobile and telecom modules.
SN74AVC4T245D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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-SOIC
SN74AVC4T245D FAQ
1.How can I place an order for SN74AVC4T245D through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC4T245D 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 SN74AVC4T245D reliable?
The price and inventory of SN74AVC4T245D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC4T245D is usually 5 days.
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SN74AVC4T245D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC4T245D 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 SN74AVC4T245D?
For technical support, including SN74AVC4T245D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC4T245D requirements.
6.How does Aetrix verify that SN74AVC4T245D is sourced from the original manufacturer or authorized distributors?
All SN74AVC4T245D 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 SN74AVC4T245D meets industry standards.
7.What is the process for return or replacement of SN74AVC4T245D?
All SN74AVC4T245D units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC4T245D, 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 SN74AVC4T245D part is unused and in its original packaging.
Return procedure for SN74AVC4T245D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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