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Texas Instruments SN74AVCBH164245VR
- Part No.:
- SN74AVCBH164245VR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVCBH164245VR.pdf
- Description:
- IC TRANSLATOR BIDIR 48TVSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AVCBH164245VR from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation, supporting bidirectional level shifting between 1.4 V and 3.6 V rails (e.g., 1.8 V ↔ 3.3 V), featuring 3-state outputs, bus-hold circuitry, and Ioff partial-power-down protection. It enables asynchronous data transfer in mixed-voltage systems such as FPGA-to-ASIC interconnects.
For engineers reviewing the SN74AVCBH164245VR datasheet, SN74AVCBH164245VR pinout, SN74AVCBH164245VR application, or SN74AVCBH164245VR equivalent, key selection criteria include its dual-rail configurability, dynamic output control (DOC™) for noise reduction without speed penalty, ±24 mA drive at 2.5 V, and TVSOP-48 package compatibility with high-density PCB layouts.
Technical Context
This device implements two independent 8-bit transceiver sections (1A↔1B and 2A↔2B), each with direction (DIR) and output-enable (OE) controls referenced to VCCB. Its fully configurable dual-rail architecture allows A-port to track VCCA (1.4–3.6 V) and B-port to track VCCB (1.4–3.6 V), enabling universal low-voltage translation across 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains.
The Dynamic Output Control (DOC™) circuitry dynamically modulates output impedance during signal transitions-initially lowering it for strong drive (±24 mA at 2.5 V), then raising it to suppress ringing and crosstalk. Bus-hold inputs eliminate external pull resistors, and Ioff protection ensures no backflow current when either VCC rail is at GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.4 V to 3.6 V each - enables interoperability between 1.5 V, 1.8 V, 2.5 V, and 3.3 V logic domains without external level-shifting components. |
| Dynamic Drive Strength | ±24 mA at 2.5 V - matches standard-output drive capability while maintaining low-noise operation via DOC™ impedance modulation. |
| Propagation Delay (tpd) | 1.3 ns to 6.8 ns (VCCA/VCCB = 1.5–3.3 V) - supports high-speed bidirectional data transfer up to ~150 MHz in typical configurations. |
| Ioff Current | ±10 µA max - prevents damaging current flow during power sequencing or partial power-down, meeting JESD78 Class II latch-up requirements. |
| Bus-Hold Input Current | ±100 µA to ±525 µA (VIL/VIH dependent) - actively holds floating data inputs at valid logic levels, eliminating need for external biasing. |
| Control Input Reference | VIH/VIL referenced to VCCB - ensures robust DIR/OE operation regardless of VCCA level, simplifying control logic design in asymmetric rail systems. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC standards for handling and board-level reliability in industrial environments. |
Pinout & Package
SN74AVCBH164245VR is packaged in a 48-pin TVSOP (DGV) with 0.4 mm pitch, 12.4 mm × 6.1 mm body, and 1.2 mm max height - optimized for space-constrained applications requiring fine-pitch surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (active-high) | Determines data flow direction per 8-bit section: DIR = L → B→A; DIR = H → A→B. Referenced to VCCB. |
| 1OE, 2OE | Output-enable input (active-low) | Disables both A and B ports of respective section into high-impedance state. Referenced to VCCB. |
| 1A1–1A8, 2A1–2A8 | A-port data I/O terminals | Connect to VCCA-supplied bus; track VCCA supply (1.4–3.6 V); include bus-hold on all inputs. |
| 1B1–1B8, 2B1–2B8 | B-port data I/O terminals | Connect to VCCB-supplied bus; track VCCB supply (1.4–3.6 V); include bus-hold on all inputs. |
| VCCA, VCCB | Independent power supplies | VCCA powers A-port circuitry and I/O; VCCB powers B-port, DIR, OE, and internal logic - enables true dual-voltage operation. |
| GND | Ground reference | Eight dedicated ground pins distributed across package to minimize ground bounce and improve signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Independent 1.4–3.6 V operation on A and B ports enables seamless interface between disparate logic families (e.g., 1.8 V FPGA ↔ 3.3 V peripheral). |
| Dynamic Output Control (DOC™) | Real-time output impedance adjustment reduces switching noise by >30% versus fixed-drive transceivers while preserving edge rate and timing margins. |
| Integrated bus-hold circuitry | Eliminates need for 10-kΩ external pullup/pulldown resistors on all 16 data lines - saves PCB area and reduces BOM count by up to 32 passives. |
| Ioff partial-power-down support | Prevents current backflow when either VCCA or VCCB is at 0 V - essential for hot-swap, power-gating, and multi-rail sequencing in portable and industrial systems. |
| Overvoltage-tolerant I/O | Withstands up to 4.6 V on any I/O pin (even when unpowered) - protects against transient overvoltage events during system bring-up or fault conditions. |
Applications
| Industrial PLC Backplane Interface | FPGA-to-Memory Interconnect |
|---|---|
|
Use Scenario: Bidirectional data exchange between 3.3 V CPU module and 1.8 V I/O expansion card in modular automation controller. IC Role / Device Role / Timing Role: Voltage-translating bus transceiver managing address/data/control signals across mixed-voltage backplane segments. Use Value: Enables direct connection without discrete level shifters; DOC™ reduces simultaneous switching noise affecting analog sensor readings on same board. |
Use Scenario: High-speed configuration and status communication between Xilinx Artix-7 FPGA (1.8 V I/O) and DDR3 SDRAM controller (2.5 V interface). IC Role / Device Role / Timing Role: Dual-supply transceiver buffering command/address lines with sub-2 ns propagation delay and matched skew across 16-bit bus. Use Value: Maintains timing closure under varying VCCA/VCCB combinations; bus-hold prevents metastability during FPGA configuration reset sequences. |
| Automotive ADAS Sensor Hub | Server Baseboard Management |
|
Use Scenario: Isolating and translating sensor data (e.g., 1.5 V camera interface) to 3.3 V microcontroller domain in vision processing module. IC Role / Device Role / Timing Role: Level-shifting transceiver with Ioff protection ensuring safe operation during domain-specific power cycling in ASIL-B systems. Use Value: Eliminates risk of latch-up or damage when camera subsystem powers down independently; meets automotive ESD requirements (ISO 10605). |
Use Scenario: Interfacing BMC (Baseboard Management Controller) running at 2.5 V with legacy IPMI peripherals operating at 3.3 V on server motherboard. IC Role / Device Role / Timing Role: 3-state-enabled bus isolator allowing shared SMBus/PCIe sideband lines between voltage-isolated subsystems. Use Value: Prevents contention during firmware updates; OE-controlled isolation supports hot-plug diagnostics without system reboot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245DGGR | Single-supply (1.2–3.6 V), no independent VCCA/VCCB rails; lacks DOC™ and bus-hold; lower drive (±12 mA). | Suitable only for uni-directional or single-rail translation; not viable for asymmetric voltage domains requiring independent rail control. | Select when cost sensitivity outweighs dual-rail flexibility and noise performance; verify VIH/VIL thresholds match host logic. |
| TXB0108PWR | Auto-sensing direction control (no DIR pin); 8-bit only; auto-bidirectional mode limits use in synchronous protocols requiring explicit direction management. | Best for UART/I²C where direction is data-dependent; unsuitable for parallel buses with separate DIR signaling like memory or PCIe sideband. | Choose only for low-pin-count, low-speed interfaces; avoid in systems requiring deterministic direction control or 16-bit width. |
Compared with SN74AVCBH164245VR, SN74AVCH16T245DGGR offers lower cost but sacrifices dual-rail configurability and noise suppression, while TXB0108PWR simplifies routing with auto-direction but lacks the timing predictability and full 16-bit width needed for high-throughput parallel buses.
Availability
SN74AVCBH164245VR is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA-to-memory interconnects, automotive ADAS sensor hubs, and server baseboard management systems requiring stable component supply and long-term manufacturability.
Supply support for SN74AVCBH164245VR 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 technologies, with decades of expertise in logic interface solutions and industrial-grade reliability.
The SN74AVCBH164245VR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for robust voltage translation and signal integrity in mixed-supply digital systems across automotive, industrial, and computing markets.
FAQ
What voltage ranges does the SN74AVCBH164245VR support on its A and B ports?
The SN74AVCBH164245VR supports independent supply voltages from 1.4 V to 3.6 V on both VCCA (A-port) and VCCB (B-port), enabling translation between common logic families including 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains. This range is validated per TI's recommended operating conditions and confirmed in the SCES393B datasheet absolute maximum and functional tables.
How does the Dynamic Output Control (DOC™) feature improve signal integrity in the SN74AVCBH164245VR?
The DOC™ circuitry in the SN74AVCBH164245VR dynamically lowers output impedance at signal transition onset for strong drive (±24 mA at 2.5 V), then raises it mid-transition to suppress ringing and reduce simultaneous switching noise - achieving up to 30% lower overshoot/undershoot versus fixed-drive transceivers without degrading propagation delay or edge rate.
Can the SN74AVCBH164245VR operate safely if one supply rail is powered down?
Yes - the SN74AVCBH164245VR includes Ioff circuitry that disables outputs and limits leakage to ±10 µA when either VCCA or VCCB is at GND, preventing damaging current backflow. This behavior is explicitly specified in the electrical characteristics table and supports partial-power-down modes required in hot-swap and power-gated systems.
What is the function of the bus-hold circuitry on the SN74AVCBH164245VR data inputs?
The bus-hold circuitry on all 16 data inputs of the SN74AVCBH164245VR actively maintains unused or floating inputs at valid logic-high or logic-low states using internal feedback, eliminating the need for external pullup or pulldown resistors. This reduces BOM count, saves PCB space, and prevents metastability in unconnected or unterminated traces.
Is the SN74AVCBH164245VR pin-compatible with other members of the SN74AVCBH16xx family?
No - the SN74AVCBH164245VR uses the TVSOP-48 (DGV) package, while variants like SN74AVCBH164245GR use TSSOP-48 (DGG) and SN74AVCBH164245KR use VFBGA-56 (GQL). Though functionally identical, mechanical dimensions, solder pad layout, and thermal profiles differ; PCB layout must be tailored to the DGV footprint per TI's MPDS006C mechanical drawing.
SN74AVCBH164245VR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCBH
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 2
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 1.4 V ~ 3.6 V
- Voltage - VCCB:
- 1.4 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Over Voltage Protection
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFSOP (0.173", 4.40mm Width)
SN74AVCBH164245VR FAQ
1.How can I place an order for SN74AVCBH164245VR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVCBH164245VR 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 SN74AVCBH164245VR reliable?
The price and inventory of SN74AVCBH164245VR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVCBH164245VR is usually 5 days.
3.What payment methods are accepted for SN74AVCBH164245VR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVCBH164245VR transactions.
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4.How is shipping managed for SN74AVCBH164245VR?
SN74AVCBH164245VR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVCBH164245VR 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 SN74AVCBH164245VR?
For technical support, including SN74AVCBH164245VR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVCBH164245VR requirements.
6.How does Aetrix verify that SN74AVCBH164245VR is sourced from the original manufacturer or authorized distributors?
All SN74AVCBH164245VR 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 SN74AVCBH164245VR meets industry standards.
7.What is the process for return or replacement of SN74AVCBH164245VR?
All SN74AVCBH164245VR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCBH164245VR, 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 SN74AVCBH164245VR part is unused and in its original packaging.
Return procedure for SN74AVCBH164245VR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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