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Texas Instruments SN74AVCBH164245KR
- Part No.:
- SN74AVCBH164245KR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVCBH164245KR.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 56BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AVCBH164245 from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation (1.4 V to 3.6 V per rail), dynamic output control (DOC™), bus-hold circuitry, and 3-state outputs. It enables bidirectional level-shifting between mismatched voltage domains-e.g., 1.8-V A-bus ↔ 3.3-V B-bus-in high-speed digital interfaces such as memory expansion and FPGA I/O bridging.
For engineers reviewing the SN74AVCBH164245 datasheet, SN74AVCBH164245 pinout, SN74AVCBH164245 application, or SN74AVCBH164245 equivalent, key selection criteria include dual-rail configurability, Ioff partial-power-down support, bus-hold elimination of external resistors, and DOC™-enabled noise reduction without speed penalty.
Technical Context
This device implements two independent 8-bit transceiver sections (1A↔1B and 2A↔2B), each with DIR and 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 interoperability across 1.5-V, 1.8-V, 2.5-V, and 3.3-V logic families without external level-shifters.
The Dynamic Output Control (DOC™) circuitry dynamically modulates output impedance during signal transitions: lowering it initially for strong drive (±24 mA at 2.5 V), then raising it to suppress ringing and crosstalk. Control inputs (1DIR, 2DIR, 1OE, 2OE) are VCCB-referenced, and Ioff protection ensures high-impedance isolation when either VCC is at GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage range (VCCA/VCCB) | 1.4 V to 3.6 V per rail - supports mixed-voltage communication between 1.5-V, 1.8-V, 2.5-V, and 3.3-V systems without external translation. |
| Dynamic drive strength | ±24 mA at 2.5-V VCC - delivers standard-output-level current for driving heavy capacitive loads while maintaining signal integrity. |
| Propagation delay (tpd) | 1.3 ns to 6.8 ns - low-latency data transfer suitable for high-speed interconnects in FPGAs, ASICs, and memory subsystems. |
| Ioff current | ±10 µA max - prevents backflow current during partial power-down, protecting powered-down sections in hot-swap or power-gated designs. |
| Bus-hold input current | ±11 µA to ±75 µA - actively holds unused inputs at valid logic levels, eliminating need for external pullup/pulldown resistors and reducing BOM count. |
| ESD rating | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements for board-level handling and system integration. |
Pinout & Package
VFBGA package (GQL/ZQL, 56-ball), 5.5 mm × 5.5 mm, 0.5-mm pitch, RoHS-compliant, MSL Level-3 (260°C peak reflow). Ball grid layout optimized for compact routing and thermal dissipation in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Determines data flow direction per 8-bit section (L = B→A, H = A→B); referenced to VCCB for consistent threshold across B-side supply. |
| 1OE, 2OE | Output enable input | Active-low control; drives both ports into high-impedance state when high - enables bus isolation and power sequencing safety. |
| VCCA, VCCB | Supply rails | Independent power inputs: VCCA powers A-port I/O, VCCB powers B-port I/O and all control pins - enables true dual-voltage operation. |
| A1–A8, B1–B8 | Data I/O terminals | Bi-directional data channels; each pair (e.g., 1A1/1B1) forms one transceiver path with bus-hold and DOC™ active. |
| GND | Ground reference | Multiple dedicated ground balls (12 total) minimize ground bounce and improve noise immunity in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable dual-rail translation | Enables seamless 1.4–3.6 V ↔ 1.4–3.6 V level shifting per port - eliminates discrete translators in multi-voltage SoC/FPGA interfaces. |
| Dynamic Output Control (DOC™) | Reduces simultaneous switching noise by 30–50% vs. fixed-drive buffers while preserving edge rate and timing margins. |
| Integrated bus-hold circuitry | Saves ≥24 external resistors on a 16-bit bus - reduces PCB area, assembly cost, and risk of floating-input latch-up. |
| Ioff partial-power-down support | Allows safe insertion/removal in live backplanes or modular systems where one rail may be unpowered while the other remains active. |
| Overvoltage-tolerant I/O | Withstands up to 4.6 V on any I/O pin regardless of VCC state - protects against transient overvoltage during power sequencing or ESD events. |
Applications
| Memory Interface Bridging | FPGA I/O Expansion |
|---|---|
Use Scenario: Connecting a 1.8-V FPGA I/O bank to a 3.3-V parallel NOR flash memory interface. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator, synchronizing data transfers between non-matching logic families. Use Value: Eliminates need for eight discrete level shifters; DOC™ ensures clean address/data strobes at >50 MHz without added termination or layout tuning. | Use Scenario: Extending a 2.5-V ASIC's GPIO header to support mixed-voltage peripheral modules (1.5-V sensors, 3.3-V displays). IC Role / Device Role / Timing Role: Configurable 16-bit I/O expander with per-port direction control and bus-hold for unconnected pins. Use Value: Reduces design iteration cycles by enabling runtime voltage reconfiguration - no hardware change needed when swapping peripheral voltage grades. |
| Industrial PLC Backplane | Automotive ADAS Sensor Hub |
Use Scenario: Interfacing a 3.3-V microcontroller unit to legacy 5-V RS-485 transceivers via isolated level-shifting. IC Role / Device Role / Timing Role: High-noise-immunity bus transceiver with Ioff and ESD hardening for harsh industrial environments. Use Value: Withstands 2000-V HBM ESD and maintains isolation during brownout - avoids system resets caused by backplane coupling transients. | Use Scenario: Aggregating camera, radar, and ultrasonic sensor data (1.8-V, 2.5-V, 3.3-V) into a central 3.3-V domain processor. IC Role / Device Role / Timing Role: Multi-rail sensor hub interface IC with programmable direction and low-latency propagation (<3 ns typical). Use Value: Enables deterministic sub-100-ns timestamp alignment across heterogeneous sensor streams - critical for sensor fusion algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245ZRGR | 48-pin VQFN, supports 1.2–3.6 V rails, no bus-hold, higher drive (±32 mA), no DOC™ | Better for ultra-low-voltage (1.2 V) systems but lacks noise suppression and floating-input protection | Select when minimum supply voltage <1.4 V is required and external pullups are acceptable. |
| TXB0108PWR | 8-bit, 20-pin TSSOP, auto-direction sensing, 1.2–3.6 V, no Ioff or bus-hold | Smaller footprint and simpler control (no DIR/OE), but limited to 8-bit and lacks industrial robustness features | Choose for space-constrained, low-pin-count applications where automatic direction detection suffices. |
Compared with SN74AVCBH164245, SN74AVCH16T245ZRGR offers wider voltage range but sacrifices noise control and input stability, while TXB0108PWR trades scalability and ruggedness for compactness and ease of use - SN74AVCBH164245 remains optimal for 16-bit, mixed-voltage, noise-sensitive industrial interfaces requiring full feature set.
Availability
SN74AVCBH164245 is available at Aetrix Electronics and suitable for memory interface bridging, FPGA I/O expansion, industrial PLC backplanes, and automotive ADAS sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AVCBH164245 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 leadership in logic interface solutions.
The SN74AVCBH164245 belongs to TI's Widebus™ family, engineered specifically for high-reliability, multi-voltage digital system interconnect - targeting industrial automation, communications infrastructure, and automotive electronics where signal integrity and power-domain flexibility are critical.
FAQ
What voltage ranges does the SN74AVCBH164245 support on its VCCA and VCCB rails?
The SN74AVCBH164245 supports independent supply voltages from 1.4 V to 3.6 V on both VCCA and VCCB rails. This allows translation between common logic families including 1.5-V, 1.8-V, 2.5-V, and 3.3-V domains. Operation outside this range - such as 1.2-V or 5-V - is not supported and may damage the SN74AVCBH164245 or violate absolute maximum ratings.
How does the Dynamic Output Control (DOC™) circuitry in the SN74AVCBH164245 reduce noise without degrading speed?
The DOC™ circuitry in the SN74AVCBH164245 dynamically lowers output impedance at signal transition onset to deliver strong drive (±24 mA), then raises it mid-transition to damp ringing. This preserves fast edge rates (tpd as low as 1.3 ns) while cutting simultaneous switching noise by up to 50% compared to fixed-drive buffers - a benefit confirmed in TI application report SCEA009 for the SN74AVCBH164245.
Can the SN74AVCBH164245 operate safely if only one supply rail (VCCA or VCCB) is powered?
Yes - the SN74AVCBH164245 includes Ioff circuitry that places both A- and B-ports into high-impedance state when either VCCA or VCCB is at GND. This prevents damaging current backflow and enables safe partial-power-down operation, a key requirement validated in JESD 78 Class II latch-up testing for the SN74AVCBH164245.
Does the SN74AVCBH164245 require external pullup or pulldown resistors on unused data inputs?
No - the SN74AVCBH164245 integrates active bus-hold circuitry on all data inputs, which maintains unused or floating pins at valid logic levels. TI explicitly advises against adding external pullup/pulldown resistors with the bus-hold function enabled, as they may conflict with the internal hold current (±11 µA to ±75 µA) and degrade performance of the SN74AVCBH164245.
What is the pin configuration and package type for the SN74AVCBH164245KR orderable part number?
The SN74AVCBH164245KR uses a 56-ball VFBGA package (ZQL footprint), 5.5 mm × 5.5 mm, 0.5-mm pitch, with ball assignments defined in TI's SCES393B datasheet. Key identifiers include 1DIR, 2DIR, 1OE, 2OE, VCCA, VCCB, and dual 8-bit I/O banks (A1–A8/B1–B8), all verified in the GQL/ZQL terminal assignment diagram for SN74AVCBH164245.
SN74AVCBH164245KR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCBH
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 56-VFBGA
SN74AVCBH164245KR FAQ
1.How can I place an order for SN74AVCBH164245KR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVCBH164245KR 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 SN74AVCBH164245KR reliable?
The price and inventory of SN74AVCBH164245KR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVCBH164245KR is usually 5 days.
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SN74AVCBH164245KR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVCBH164245KR 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 SN74AVCBH164245KR?
For technical support, including SN74AVCBH164245KR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVCBH164245KR requirements.
6.How does Aetrix verify that SN74AVCBH164245KR is sourced from the original manufacturer or authorized distributors?
All SN74AVCBH164245KR 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 SN74AVCBH164245KR meets industry standards.
7.What is the process for return or replacement of SN74AVCBH164245KR?
All SN74AVCBH164245KR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCBH164245KR, 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 SN74AVCBH164245KR part is unused and in its original packaging.
Return procedure for SN74AVCBH164245KR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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