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Texas Instruments SN74AVCH4T245PWR
- Part No.:
- SN74AVCH4T245PWR
- Manufacturer:
- Texas Instruments
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AVCH4T245PWR.pdf
- Description:
- IC TRANSLATION TXRX 3.6V 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,601
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Product details
Overview
SN74AVCH4T245PWR from Texas Instruments is a 4-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2V–3.6V domains, with configurable level-shifting, 3-state outputs, and I/Os tolerant to 4.6V. It supports up to 380Mbps (1.8V→3.3V), features bus-hold on all data inputs, and operates across industrial temperature range (–40°C to +85°C) for low-voltage interconnect in mixed-rail systems.
For engineers reviewing the SN74AVCH4T245PWR datasheet, SN74AVCH4T245PWR pinout, SN74AVCH4T245PWR application, or SN74AVCH4T245PWR equivalent, key selection criteria include dual-rail VCCA/VCCB independence, Ioff partial-power-down support, 4.6V I/O tolerance, bus-hold elimination of external resistors, and verified 380Mbps translation performance at 1.8V→3.3V.
Technical Context
The SN74AVCH4T245PWR implements a fully configurable dual-rail architecture where A-port I/Os and control pins (1DIR, 2DIR, 1OE, 2OE) are referenced to VCCA (1.2V–3.6V), while B-port I/Os track VCCB (1.2V–3.6V). Direction control is asynchronous per channel pair (1DIR/2DIR), and output enable (1OE/2OE) independently places each port's outputs into high-impedance state.
VCC isolation ensures both ports enter high-impedance mode if either VCCA or VCCB falls below ~0.4V, preventing false logic propagation. Bus-hold circuitry actively sustains undriven A/B-port inputs at valid logic levels without external pull resistors-verified for VI = 0.42V–0.91V across 1.2V–3.6V supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.2V to 3.6V each - enables universal bidirectional translation among 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V logic domains |
| Max Data Rate | 380Mbps (1.8V→3.3V) - verified high-speed operation for modern low-voltage interfaces |
| I/O Voltage Tolerance | 4.6V - allows safe interfacing with higher-voltage peripherals without clamping diodes |
| Ioff Current | ±5µA max - prevents backflow current during partial power-down, protecting powered-down subsystems |
| Bus-Hold Sustaining Current | ±25µA to ±100µA (VCCA = 1.2V–3.6V) - maintains stable logic states on floating inputs without external components |
| ESD Rating (HBM) | ±8000V - exceeds JEDEC JESD22-A114A for robust handling in manufacturing and field environments |
| Operating Temperature | –40°C to +85°C - qualified for industrial and embedded applications requiring thermal resilience |
Pinout & Package
PW package: 16-pin TSSOP (5mm × 6.4mm), lead pitch 0.65mm, exposed pad not present. Compatible with standard surface-mount reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply rail | Power source for A-side I/Os and control inputs (1DIR, 2DIR, 1OE, 2OE); sets VIH/VIL thresholds |
| VCCB | B-port supply rail | Power source for B-side I/Os; independent of VCCA, enabling asymmetric voltage translation |
| 1DIR, 2DIR | Direction control inputs | Active-high signals determining data flow direction per 2-bit channel (A→B or B→A) |
| 1OE, 2OE | Output-enable inputs | Active-low enables; high state forces corresponding port outputs into 3-state (Hi-Z) mode |
| 1A1, 1A2, 2A1, 2A2 | A-port I/Os | Bi-directional data lines referenced to VCCA; include integrated bus-hold circuitry |
| 1B1, 1B2, 2B1, 2B2 | B-port I/Os | Bi-directional data lines referenced to VCCB; tolerate up to 4.6V regardless of VCCB |
| GND | Ground reference | Common return path for both supply rails; two pins (pins 8 & 9) reduce ground impedance |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent VCCA/VCCB supplies (1.2V–3.6V) allow any-to-any low-voltage domain bridging without external level-shifters |
| Integrated bus-hold | Eliminates need for external pull-up/pull-down resistors on all 8 data I/Os, reducing BOM count and board space |
| Ioff partial-power-down | Disables I/O output circuits when VCCA or VCCB = 0V, preventing damaging current backflow into powered-down sections |
| VCC isolation | Automatically places both A and B ports in high-impedance state if either VCCA or VCCB drops below ~0.4V, avoiding bus contention |
| 4.6V I/O tolerance | Enables safe connection to legacy 5V-tolerant peripherals or test equipment without interface protection components |
Applications
| Industrial PLC I/O Expansion | Low-Power Wearable Sensor Hub |
|---|---|
Use Scenario: Interfacing 1.8V microcontroller GPIOs to 3.3V analog front-end ICs and isolated digital I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing asynchronous data exchange between mixed-voltage subsystems with deterministic 3-state control. Use Value: Enables direct connection without discrete level-shifter ICs or resistor networks, reducing component count and improving signal integrity at ≤200Mbps. | Use Scenario: Connecting ultra-low-power 1.2V sensor nodes (accelerometer, gyroscope) to a 2.5V Bluetooth SoC in compact wearable form factors. IC Role / Device Role / Timing Role: Low-quiescent-current bidirectional bridge supporting intermittent burst-mode communication with automatic bus-hold retention during sleep states. Use Value: Eliminates external pull resistors (saving >0.5mm² PCB area per line) and supports 1.2V operation - critical for battery runtime extension. |
| Enterprise SSD Controller Interface | Telecom Baseband FPGA Interconnect |
Use Scenario: Translating command/status signals between a 1.5V NVMe controller and 3.3V power management ICs and thermal sensors in enterprise solid-state drives. IC Role / Device Role / Timing Role: High-reliability voltage translator with Ioff and VCC isolation ensuring safe hot-swap and power sequencing compliance. Use Value: Prevents backfeed during staggered rail ramp-up and guarantees Hi-Z state if either rail fails - meeting JEDEC JESD78 latch-up Class II requirements. | Use Scenario: Bridging 1.8V FPGA I/O banks to 2.5V RF transceiver control lines and 3.3V monitoring ADCs in 5G baseband units. IC Role / Device Role / Timing Role: Multi-domain signal conditioner providing simultaneous 1.8V↔2.5V and 1.8V↔3.3V translation with sub-3ns propagation delay. Use Value: Achieves 380Mbps throughput in 1.8V→3.3V mode, meeting JESD204B subclass 1 timing margins for high-speed serial links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4T245PWR | Lower max data rate (240Mbps), no bus-hold, 3.6V I/O tolerance only | Lacks bus-hold and Ioff; requires external pull resistors and has reduced ESD robustness (HBM ±2000V) | Select when cost sensitivity outweighs need for bus-hold or high-speed translation |
| TXS0104EPWR | Auto-direction sensing (no DIR pins), lower drive strength (±8mA), 5.5V tolerant I/Os | Unidirectional auto-sensing eliminates DIR control but limits full-duplex use; higher voltage tolerance suits mixed 5V/3.3V systems | Select for simpler control interface where direction is predictable and 5.5V tolerance is required |
Compared with SN74LVC4T245PWR and TXS0104EPWR, the SN74AVCH4T245PWR uniquely combines 380Mbps speed, integrated bus-hold, 4.6V I/O tolerance, and Ioff - making it optimal for high-integrity, space-constrained, multi-rail embedded designs requiring minimal external components.
Availability
SN74AVCH4T245PWR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, low-power wearable sensor hubs, enterprise SSD controller interfaces, and telecom baseband FPGA interconnect requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SN74AVCH4T245PWR 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 families.
The SN74AVCH4T245PWR belongs to TI's AVC logic family, engineered specifically for low-voltage bidirectional level translation in mixed-supply systems - targeting portable, industrial, and communications equipment where power efficiency, signal integrity, and design simplicity are critical.
FAQ
What is the maximum supported data rate for SN74AVCH4T245PWR in 1.8V to 3.3V translation?
The SN74AVCH4T245PWR supports up to 380Mbps when translating signals from 1.8V to 3.3V, as confirmed in the official datasheet switching characteristics tables under VCCA = 1.8V ± 0.15V and VCCB = 3.3V ± 0.3V conditions. This performance is validated across the full industrial temperature range (–40°C to +85°C) and represents the highest rated speed for this device.
Does SN74AVCH4T245PWR require external pull-up or pull-down resistors on its data lines?
No, the SN74AVCH4T245PWR includes active bus-hold circuitry on all eight data I/Os (1A1, 1A2, 2A1, 2A2, 1B1, 1B2, 2B1, 2B2), which maintains undriven inputs at valid logic states without external resistors. The datasheet explicitly advises against using pull-up or pull-down resistors with the SN74AVCH4T245PWR due to potential conflict with internal bus-hold functionality.
How does the Ioff feature function in SN74AVCH4T245PWR during partial power-down?
The Ioff feature in SN74AVCH4T245PWR disables the output drivers when either VCCA or VCCB is at 0V, limiting Ioff current to ±5µA maximum. This prevents damaging backflow current from a live rail into a powered-down section - a critical requirement for hot-plug and power-gated system architectures. The behavior is guaranteed across –40°C to +85°C.
Can SN74AVCH4T245PWR translate between 1.2V and 2.5V domains bidirectionally?
Yes, the SN74AVCH4T245PWR supports bidirectional translation between 1.2V and 2.5V domains. With VCCA = 1.2V and VCCB = 2.5V (or vice versa), the device operates within its specified 1.2V–3.6V dual-rail range and delivers verified performance: 200Mbps data rate, tPLH/tPHL ≤ 4.6ns (typical), and full bus-hold and Ioff functionality - all confirmed in Sections 5.6 and 5.9 of the datasheet.
What is the purpose of the VCC isolation feature in SN74AVCH4T245PWR?
The VCC isolation feature in SN74AVCH4T245PWR ensures that if either VCCA or VCCB falls below approximately 0.4V (e.g., during power sequencing or rail failure), both A and B ports automatically enter high-impedance mode. This prevents false logic states from propagating across the bus and avoids contention or unintended activation of downstream devices - a key safety mechanism for robust system-level power management.
SN74AVCH4T245PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCH
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- 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-TSSOP
SN74AVCH4T245PWR FAQ
1.How can I place an order for SN74AVCH4T245PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVCH4T245PWR 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 SN74AVCH4T245PWR reliable?
The price and inventory of SN74AVCH4T245PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVCH4T245PWR is usually 5 days.
3.What payment methods are accepted for SN74AVCH4T245PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVCH4T245PWR transactions.
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4.How is shipping managed for SN74AVCH4T245PWR?
SN74AVCH4T245PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVCH4T245PWR 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 SN74AVCH4T245PWR?
For technical support, including SN74AVCH4T245PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVCH4T245PWR requirements.
6.How does Aetrix verify that SN74AVCH4T245PWR is sourced from the original manufacturer or authorized distributors?
All SN74AVCH4T245PWR 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 SN74AVCH4T245PWR meets industry standards.
7.What is the process for return or replacement of SN74AVCH4T245PWR?
All SN74AVCH4T245PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCH4T245PWR, 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 SN74AVCH4T245PWR part is unused and in its original packaging.
Return procedure for SN74AVCH4T245PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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