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Texas Instruments SN74AVC8T245PWG4
- Part No.:
- SN74AVC8T245PWG4
- Manufacturer:
- Texas Instruments
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AVC8T245PWG4.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,517
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Product details
Overview
SN74AVC8T245PWG4 from Texas Instruments is an 8-bit dual-supply bus transceiver enabling bidirectional voltage-level translation between 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains. It features independent VCCA (1.2–3.6 V) and VCCB (1.2–3.6 V) rails, 3-state outputs controlled by DIR/OE, Ioff for partial power-down, and 4.6-V I/O tolerance - deployed in mixed-voltage data buses within industrial control modules.
For engineers reviewing the SN74AVC8T245PWG4 datasheet, SN74AVC8T245PWG4 pinout, SN74AVC8T245PWG4 application, or SN74AVC8T245PWG4 equivalent, key selection criteria include dual-rail operating range (1.2–3.6 V per rail), maximum 320 Mbps data rate at ≥1.8 V supplies, VCC isolation behavior, Ioff leakage specification (±0.1 µA), and TSSOP-24 package compatibility with legacy '245 footprints.
Technical Context
The SN74AVC8T245PWG4 implements asynchronous bidirectional data flow via a single DIR input referenced to VCCA, with OE enabling/disabling all A/B I/Os simultaneously. Its dual-rail architecture decouples A-port logic (VCCA-referenced) from B-port logic (VCCB-referenced), enabling true level-shifting without external biasing.
Control inputs (DIR, OE) are strictly referenced to VCCA, while I/O pins A1–A8 track VCCA and B1–B8 track VCCB. The device enters high-impedance on either port when its respective supply is at GND (VCC isolation), and supports safe partial power-down via Ioff circuitry limiting leakage to ±0.1 µA across powered/unpowered rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range (VCCA / VCCB) | 1.2 V to 3.6 V each - enables translation between 1.2/1.5/1.8/2.5/3.3 V domains without external level-shifters |
| Max Data Rate | 320 Mbps when both VCCA ≥ 1.8 V and VCCB ≥ 1.8 V - supports high-speed interconnect in DDR memory interfaces and FPGA I/O expansion |
| I/O Voltage Tolerance | 4.6 V - allows safe interfacing with 3.3-V systems even when VCCA/VCCB = 1.2 V, eliminating clamping diodes |
| Ioff Leakage | ±0.1 µA max at –40°C to +125°C - ensures no damaging backflow during partial power-down in hot-swap or battery-backed systems |
| VCC Isolation | Both ports go high-Z if either VCCA or VCCB = GND - prevents contention and latch-up during asymmetric power sequencing |
| ESD Rating (HBM) | ±8000 V - exceeds JEDEC JESD22-A114-A, suitable for handling in non-ESD-controlled manufacturing environments |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive ECUs and industrial motor drives |
Pinout & Package
TSSOP-24 package (7.8 mm × 6.4 mm), lead pitch 0.65 mm, body height 1.2 mm - compatible with standard surface-mount assembly processes and legacy PCB layouts for 24-pin '245 transceivers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | I/O (A-port) | Bi-directional data lines referenced to VCCA; tolerate up to 4.6 V regardless of VCCA setting |
| B1–B8 | I/O (B-port) | Bi-directional data lines referenced to VCCB; tolerate up to 4.6 V regardless of VCCB setting |
| DIR | Input | Direction control: HIGH = A→B, LOW = B→A; referenced to VCCA, not VCCB |
| OE | Input | Output enable: LOW = active drive, HIGH = 3-state; referenced to VCCA |
| VCCA | Power | Supply for A-port I/Os and control inputs (DIR/OE); must be 1.2–3.6 V |
| VCCB | Power | Supply for B-port I/Os; must be 1.2–3.6 V; independent of VCCA |
| GND (pins 11,12,13) | Ground | Common reference for both rails; three dedicated pins reduce ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent 1.2–3.6 V operation on VCCA and VCCB enables interoperability across five standard low-voltage logic families |
| VCC isolation | Automatic high-impedance on both ports when either VCCA or VCCB = GND - eliminates need for external power-good sequencing logic |
| Ioff partial power-down | Sub-µA leakage (±0.1 µA) prevents current backflow during rail shutdown - critical for battery-powered subsystems |
| 4.6-V tolerant I/Os | Allows direct connection to 3.3-V buses even when translating from 1.2-V logic - removes external clamping components |
| 320 Mbps max throughput | Supports high-bandwidth applications like FPGA-to-ASIC bridging and multi-core processor interconnects at ≥1.8 V supplies |
Applications
| Industrial PLC Backplane | FPGA I/O Expansion |
|---|---|
Use Scenario: Interfacing 3.3-V fieldbus controllers with 1.8-V FPGA configuration logic across a shared backplane. IC Role / Device Role / Timing Role: Bidirectional level translator isolating voltage domains while maintaining signal integrity at 100+ MHz clock rates. Use Value: Eliminates discrete resistor-divider networks and reduces BOM count by consolidating eight channels in one TSSOP-24 package. |
Use Scenario: Extending FPGA GPIO banks to support mixed-voltage peripheral interfaces (e.g., 1.2-V MIPI sensors + 2.5-V ADCs). IC Role / Device Role / Timing Role: Configurable bus transceiver enabling dynamic direction control and 3-state isolation during reconfiguration. Use Value: Enables single-FPGA designs to drive heterogeneous peripherals without custom PCB layer routing for separate voltage islands. |
| Automotive ADAS Sensor Hub | Enterprise SSD Controller Interface |
Use Scenario: Connecting 1.5-V image sensor streams to a 3.3-V domain controller in a camera module with strict thermal constraints. IC Role / Device Role / Timing Role: Low-power voltage translator with Ioff and VCC isolation supporting safe hot-plug of sensor subassemblies. Use Value: Prevents fault propagation during sensor power cycling and meets AEC-Q100 Grade 1 (–40°C to +125°C) requirements. |
Use Scenario: Bridging NVMe controller (1.8-V I/O) to legacy SATA PHY (3.3-V signaling) in hybrid storage accelerators. IC Role / Device Role / Timing Role: High-speed bidirectional transceiver meeting PCIe Gen3 timing budgets with <3.5 ns propagation delay at 1.8 V/2.5 V. Use Value: Delivers deterministic 320 Mbps throughput with sub-5 ns tPLH/tPHL - avoids retiming logic and simplifies SerDes integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH8T245PW | Includes bus-hold circuitry on all I/Os; otherwise identical voltage ranges, speed, and pinout | Eliminates need for external pull-up/down resistors on floating data lines - preferred in systems with intermittent bus activity | Select SN74AVCH8T245PW when bus-hold functionality is required to maintain last valid state during idle periods |
| TXB0108PWR | Auto-direction sensing (no DIR pin); lower drive strength (4 mA vs 12 mA); 1.2–3.6 V dual-rail | Suitable for unidirectional or simple bidirectional protocols (I²C, UART) but not high-speed parallel buses requiring precise DIR control | Choose TXB0108PWR only for low-speed, auto-sensing applications - not a functional replacement for SN74AVC8T245PWG4 in synchronous parallel interfaces |
Compared with SN74AVCH8T245PW, the SN74AVC8T245PWG4 lacks bus-hold but offers tighter timing control for synchronous systems; versus TXB0108PWR, it provides deterministic DIR-based direction control and higher drive strength essential for noise-immune parallel bus operation.
Availability
SN74AVC8T245PWG4 is available at Aetrix Electronics and suitable for industrial automation, automotive ADAS sensor hubs, and enterprise SSD controller interfaces requiring stable component supply and long-term lifecycle support.
Supply support for SN74AVC8T245PWG4 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 for industrial, automotive, and communications markets.
The SN74AVC8T245 belongs to TI's AVC (Advanced Very-Low-Voltage CMOS) logic family, designed specifically for robust, high-speed voltage translation in mixed-supply digital systems with stringent power and thermal constraints.
FAQ
What voltage ranges does the SN74AVC8T245PWG4 support on VCCA and VCCB?
The SN74AVC8T245PWG4 supports independent supply voltages from 1.2 V to 3.6 V on both VCCA and VCCB. This allows translation between any combination of 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V logic domains. Operation is guaranteed down to 1.2 V per rail, and the device remains functional even if one rail is at GND due to its VCC isolation feature.
How does the DIR pin function in the SN74AVC8T245PWG4?
The DIR pin on the SN74AVC8T245PWG4 controls data direction: a HIGH level enables transmission from A-port to B-port, while a LOW level enables transmission from B-port to A-port. Critically, DIR is referenced to VCCA - not VCCB - and must be driven within the VCCA supply range. This ensures reliable control even when VCCB operates at a different voltage.
Does the SN74AVC8T245PWG4 support partial power-down, and how is it implemented?
Yes, the SN74AVC8T245PWG4 supports partial power-down via its Ioff circuitry. When either VCCA or VCCB is at 0 V, the Ioff feature disables output drivers and limits leakage current to ±0.1 µA across all I/O pins. This prevents damaging current backflow and maintains system safety during asymmetric power sequencing or hot-swap events.
What is the maximum data rate achievable with the SN74AVC8T245PWG4?
The SN74AVC8T245PWG4 achieves up to 320 Mbps when both VCCA and VCCB are ≥1.8 V. At lower supply voltages (<1.8 V), the maximum data rate drops to 170 Mbps. Propagation delays remain below 3.5 ns under typical 1.8-V/2.5-V conditions, making it suitable for high-speed parallel interfaces such as memory expansion and FPGA-to-ASIC bridging.
Is the SN74AVC8T245PWG4 pin-compatible with other '245 transceivers?
The SN74AVC8T245PWG4 uses a standard TSSOP-24 footprint identical to industry-standard '245 devices, including mechanical and solder-pad compatibility. However, electrical behavior differs: control inputs are VCCA-referenced, I/Os are 4.6-V tolerant, and it includes VCC isolation and Ioff - meaning direct substitution requires validation of these functional differences in the target design.
SN74AVC8T245PWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Logic Type:
- Translation Transceiver
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- 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:
- 24-TSSOP
SN74AVC8T245PWG4 FAQ
1.How can I place an order for SN74AVC8T245PWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC8T245PWG4 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 SN74AVC8T245PWG4 reliable?
The price and inventory of SN74AVC8T245PWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC8T245PWG4 is usually 5 days.
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SN74AVC8T245PWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC8T245PWG4 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 SN74AVC8T245PWG4?
For technical support, including SN74AVC8T245PWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC8T245PWG4 requirements.
6.How does Aetrix verify that SN74AVC8T245PWG4 is sourced from the original manufacturer or authorized distributors?
All SN74AVC8T245PWG4 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 SN74AVC8T245PWG4 meets industry standards.
7.What is the process for return or replacement of SN74AVC8T245PWG4?
All SN74AVC8T245PWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC8T245PWG4, 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 SN74AVC8T245PWG4 part is unused and in its original packaging.
Return procedure for SN74AVC8T245PWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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