My Inquiry
My Account
Texas Instruments SN74AVC4T245PWTG4
- Part No.:
- SN74AVC4T245PWTG4
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AVC4T245PWTG4.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,678
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 serves as a level-shifting interface in mixed-voltage SoC-to-peripheral communication.
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, VCCA-referenced DIR/OE inputs, Ioff-enabled isolation during power sequencing, and verified 380Mbps performance at 1.8V→3.3V translation.
Technical Context
The SN74AVC4T245 implements two independent 2-bit bidirectional channels, each with dedicated DIR and OE controls referenced to VCCA. Its fully configurable dual-rail architecture allows simultaneous operation of A-port I/Os (VCCA-referenced) and B-port I/Os (VCCB-referenced) across non-matching supply voltages - e.g., 1.2V A-side ↔ 3.3V B-side - without external biasing or direction-sensing logic.
Each channel supports asynchronous data flow in either direction based on DIR state while OE independently places A- or B-port outputs into high-impedance mode. The device incorporates VCC isolation: if either VCCA or VCCB is at GND, both ports enter high-Z. Ioff circuitry disables outputs during partial power-down, blocking backflow current when one rail is unpowered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V - enables translation between any pair of standard low-voltage nodes (1.2V/1.5V/1.8V/2.5V/3.3V) |
| Max Data Rate | 380Mbps (1.8V→3.3V) - supports high-speed interfaces like SDIO, eMMC, or low-voltage parallel buses |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage legacy peripherals without clamping diodes |
| Ioff Current | ±5μA max - ensures negligible leakage and prevents damaging backflow during asymmetric power sequencing |
| ESD Protection | 8kV HBM, 150V MM, 1kV CDM - meets industrial-grade robustness requirements for board-level handling |
| Propagation Delay | 2.6–3.6ns (typ, VCCA=3.3V/VCCB=2.5V) - enables timing-critical applications with sub-4ns channel latency |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial temperature range operation |
Pinout & Package
Packaged in a 16-pin TSSOP (PW), the SN74AVC4T245 measures 5mm × 6.4mm and features exposed thermal pad for enhanced thermal dissipation in compact layouts.
| 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 |
| 1OE, 2OE | Output-enable input (per channel) | Referenced to VCCA; high = corresponding port outputs in high-impedance state |
| 1A1, 1A2, 2A1, 2A2 | A-port I/Os | Bi-directional signals referenced to VCCA; must be driven to valid logic levels to avoid excess ICCZ |
| 1B1, 1B2, 2B1, 2B2 | B-port I/Os | Bi-directional signals referenced to VCCB; tolerate up to 4.6V regardless of VCCB |
| VCCA | A-port supply | Supplies A-port I/Os and all control inputs (DIR/OE); sets VIH/VIL thresholds |
| VCCB | B-port supply | Supplies B-port I/Os only; independent of VCCA for true dual-rail operation |
| GND | Ground reference | Common return for both power domains; required for proper Ioff and ESD performance |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent 1.2–3.6V operation on A and B ports enables flexible interconnection of heterogeneous voltage domains |
| VCCA-referenced control logic | DIR and OE inputs track VCCA, eliminating need for level-shifted control signals in asymmetric systems |
| Ioff partial-power-down | Disables outputs and blocks reverse current when either VCCA or VCCB is unpowered - critical for hot-swap and power-gating designs |
| VCC isolation | Automatically forces both ports into high-Z if either VCCA or VCCB drops to GND - prevents bus contention during brownout |
| 4.6V-tolerant I/Os | Allows direct connection to 3.3V or 5V peripherals without external protection, reducing BOM count and layout area |
Applications
| Mobile Memory Interface | Industrial PLC Backplane |
|---|---|
Use Scenario: Interfacing a 1.2V application processor to a 3.3V SD card slot in handheld devices. IC Role / Device Role / Timing Role: Bidirectional level translator managing command/data/address lines with 380Mbps capability and automatic direction control. Use Value: Eliminates discrete MOSFET translators and reduces PCB layer count by supporting full SDIO 4-bit mode at native speed. |
Use Scenario: Connecting a 2.5V FPGA I/O bank to legacy 3.3V fieldbus modules in programmable logic controllers. IC Role / Device Role / Timing Role: Isolated bus transceiver providing galvanically separated signal integrity with Ioff-enabled safe power sequencing. Use Value: Enables hot-plug module replacement without system reset via VCC isolation and controlled high-Z transitions. |
| Server Baseboard Management | Automotive Infotainment Gateway |
Use Scenario: Bridging 1.8V BMC microcontroller GPIOs to 3.3V IPMI sensor interfaces in datacenter servers. IC Role / Device Role / Timing Role: Low-latency (≤3.6ns) 2-bit translator with per-channel OE for selective bus partitioning. Use Value: Supports real-time sensor polling and fault reporting without adding propagation delay to critical watchdog paths. |
Use Scenario: Level-shifting between 1.5V ADAS SoC and 2.5V audio codec in automotive head units. IC Role / Device Role / Timing Role: Dual-channel translator with independent DIR/OE enabling concurrent CAN-FD and audio data routing. Use Value: Meets AEC-Q100 Grade 2 temperature requirements while maintaining <100ps skew between stereo channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4T245 | Single-supply (1.65–3.6V), no VCCB rail; lower max data rate (240Mbps), no Ioff | Limited to same-voltage-domain translation; unsuitable for asymmetric power sequencing | Select when cost sensitivity outweighs dual-rail flexibility and partial-power-down is unnecessary |
| TXS0104E | Auto-direction sensing (no DIR pin), lower drive strength (±8mA), 1.65–3.6V only | Eliminates direction-control wiring but adds propagation delay uncertainty; not suitable for synchronous bidirectional protocols | Prefer for simple GPIO expansion where direction changes infrequently and timing margin is ample |
Compared with SN74LVC4T245 and TXS0104E, the SN74AVC4T245 uniquely delivers guaranteed 380Mbps performance across 1.2–3.6V dual-rail operation with Ioff and VCC isolation - making it the only option for high-speed, mixed-voltage, hot-pluggable systems requiring deterministic direction control and robust power sequencing.
Availability
SN74AVC4T245 is available at Aetrix Electronics and suitable for mobile memory interface, industrial PLC backplane, server baseboard management, and automotive infotainment gateway applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
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 systems.
The SN74AVC4T245 belongs to TI's AVC (Advanced Very-low-voltage CMOS) logic family, engineered specifically for ultra-low-voltage bidirectional translation in space-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 standard low-voltage logic domains - including 1.2V↔1.5V, 1.2V↔3.3V, 1.8V↔2.5V, and 2.5V↔3.3V - without external components or configuration.
How does the SN74AVC4T245 handle power sequencing when only one supply rail is active?
The SN74AVC4T245 uses Ioff circuitry to disable outputs and block reverse current when either VCCA or VCCB is unpowered. Additionally, its VCC isolation feature forces both A and B ports into high-impedance state if either supply drops to GND - preventing bus contention and ensuring safe hot-plug operation in the SN74AVC4T245.
Can the SN74AVC4T245 translate signals from 1.2V to 3.3V, and what is its maximum data rate in that configuration?
Yes, the SN74AVC4T245 supports 1.2V-to-3.3V translation. In this configuration, its maximum data rate is 100Mbps, as specified in the official datasheet under "Maximum data rates" - a value derived from switching characteristics measured at VCCA=1.2V and VCCB=3.3V.
Are the DIR and OE inputs of the SN74AVC4T245 referenced to VCCA or VCCB?
The DIR and OE inputs of the SN74AVC4T245 are explicitly referenced to VCCA, as confirmed in the Functional Description and Pin Functions table. Their VIH and VIL thresholds scale with VCCA, meaning no additional level-shifting is required for control signals when VCCA differs from VCCB.
Does the SN74AVC4T245 require external pull-up or pull-down resistors on its I/O pins?
No external pull-up or pull-down resistors are required on the SN74AVC4T245 I/O pins during normal operation. However, TI recommends tying OE to VCCA through a pullup resistor during power-up/down to ensure outputs remain in high-impedance state until both VCCA and VCCB are stable - a requirement explicitly stated in the SN74AVC4T245 datasheet.
SN74AVC4T245PWTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-TSSOP
SN74AVC4T245PWTG4 FAQ
1.How can I place an order for SN74AVC4T245PWTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC4T245PWTG4 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 SN74AVC4T245PWTG4 reliable?
The price and inventory of SN74AVC4T245PWTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC4T245PWTG4 is usually 5 days.
3.What payment methods are accepted for SN74AVC4T245PWTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVC4T245PWTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AVC4T245PWTG4?
SN74AVC4T245PWTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC4T245PWTG4 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 SN74AVC4T245PWTG4?
For technical support, including SN74AVC4T245PWTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC4T245PWTG4 requirements.
6.How does Aetrix verify that SN74AVC4T245PWTG4 is sourced from the original manufacturer or authorized distributors?
All SN74AVC4T245PWTG4 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 SN74AVC4T245PWTG4 meets industry standards.
7.What is the process for return or replacement of SN74AVC4T245PWTG4?
All SN74AVC4T245PWTG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC4T245PWTG4, 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 SN74AVC4T245PWTG4 part is unused and in its original packaging.
Return procedure for SN74AVC4T245PWTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AVC4T245PWTG4 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…
