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Texas Instruments SN74AVCB164245VR
- Part No.:
- SN74AVCB164245VR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVCB164245VR.pdf
- Description:
- IC TRANSLATOR BIDIR 48TVSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74AVCB164245VR from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs, designed for bidirectional level-shifting between 1.4-V to 3.6-V domains (e.g., 1.8-V ↔ 3.3-V buses). It features independent A/B ports tracking VCCA and VCCB, ±24-mA dynamic drive capability, Ioff partial-power-down support, and DOC™ circuitry for noise reduction. Used in FPGA-to-ASIC interconnects, memory subsystems, and mixed-voltage SoC interfaces.
For engineers reviewing the SN74AVCB164245VR datasheet, SN74AVCB164245VR pinout, SN74AVCB164245VR application, or SN74AVCB164245VR equivalent, key selection considerations include dual-rail voltage flexibility, 48-pin TVSOP (DGV) package compatibility, DIR/OE control logic behavior, and Ioff-enabled isolation during power sequencing.
Technical Context
This device implements asynchronous bidirectional data flow controlled by DIR inputs per 8-bit section and enabled/disabled via OE pins referenced to VCCB. Each port operates independently across 1.4 V–3.6 V, enabling translation without speed penalty - tpd as low as 1.3 ns (VCCA=2.5 V, VCCB=1.5 V).
The DOC™ circuitry dynamically modulates output impedance during transitions to maintain high drive strength while minimizing switching noise. Control inputs (1DIR, 2DIR, 1OE, 2OE) are VCCB-referenced, and Ioff ensures <±10 µA leakage when either VCC rail is at GND, supporting robust partial-power-down operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA / VCCB Range | 1.4 V to 3.6 V each - enables universal translation among 1.5-V, 1.8-V, 2.5-V, and 3.3-V logic domains without external level shifters. |
| Dynamic Drive | ±24 mA IOH/IOL - matches standard-output drive strength while maintaining low-noise operation via DOC™ impedance control. |
| tPD (Max) | 7.6 ns - propagation delay measured A↔B under worst-case VCCA/VCCB combinations (e.g., 1.8 V → 3.3 V), ensuring timing closure in high-speed interconnects. |
| Ioff Leakage | <±10 µA - prevents backflow current when one supply is powered down, critical for hot-swap and power-gated system designs. |
| VIH/VIL Reference | Control inputs referenced to VCCB - simplifies interface design when OE/DIR signals originate from the B-side domain. |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC standards for robustness in manufacturing and field environments. |
Pinout & Package
SN74AVCB164245VR is packaged in a 48-pin Thin Very Small Outline Package (TVSOP, DGV), 6.1 mm × 12.5 mm × 1.2 mm max height, JEDEC MO-153 compliant, with pin 1 quadrant Q1 orientation on tape-and-reel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input (per 8-bit section) | Determines data flow direction: DIR = L → B→A; DIR = H → A→B. Referenced to VCCB. |
| 1OE, 2OE | Output enable input (per 8-bit section) | Active-Low: OE = L enables transceiver; OE = H places both A/B ports in high-impedance state. Referenced to VCCB. |
| 1A1–1A8, 2A1–2A8 | A-port data I/O terminals | Track VCCA supply; tolerate up to VCCA + 0.5 V in active state; overvoltage-tolerant up to 4.6 V in Hi-Z/off state. |
| 1B1–1B8, 2B1–2B8 | B-port data I/O terminals | Track VCCB supply; tolerate up to VCCB + 0.5 V in active state; overvoltage-tolerant up to 4.6 V in Hi-Z/off state. |
| VCCA, VCCB | Independent power supplies | VCCA powers A-port circuitry and I/O; VCCB powers B-port circuitry, DIR/OE logic, and B-port I/O - enables true dual-rail operation. |
| GND | Ground reference | Eight dedicated ground pins distributed across package for low-inductance return paths and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-rail voltage translation | Each port operates independently from 1.4 V to 3.6 V - eliminates need for discrete level shifters in heterogeneous voltage systems. |
| DOC™ dynamic output control | Reduces simultaneous switching noise by modulating output impedance mid-transition - maintains ±24 mA drive without overshoot/ringing. |
| Ioff partial-power-down protection | Disables outputs and limits leakage to <±10 µA when either VCCA or VCCB = GND - prevents backfeed damage during power sequencing. |
| VCCB-referenced controls | DIR/OE inputs use VCCB as reference - simplifies signal sourcing from B-side controllers (e.g., processors, FPGAs on 3.3-V rail). |
| Overvoltage-tolerant I/O | Withstands up to 4.6 V on any I/O pin regardless of supply state - supports safe interfacing with higher-voltage legacy peripherals. |
Applications
| PCI Express® Slot Interface | FPGA-to-SDRAM Memory Bridge |
|---|---|
|
Use Scenario: Bridging 1.8-V FPGA I/O banks to 3.3-V PCIe slot signaling lines in embedded computing modules. IC Role / Device Role / Timing Role: Bidirectional voltage translator managing command/address/data flow between domains with precise DIR/OE timing control. Use Value: Eliminates discrete level-shifter ICs and associated board area; tpd ≤ 5.8 ns (1.8 V → 3.3 V) meets PCIe Gen1 setup/hold margins. |
Use Scenario: Interfacing a 2.5-V FPGA memory controller to 3.3-V SDRAM chips in industrial motion-control systems. IC Role / Device Role / Timing Role: Dual-rail transceiver enabling synchronous read/write cycles across voltage domains with matched A/B propagation delays. Use Value: Ioff prevents current backflow during FPGA configuration reset; DOC™ reduces DDR address bus noise affecting timing margin. |
| Automotive ADAS Sensor Hub | Industrial PLC I/O Module |
|
Use Scenario: Aggregating 1.5-V image sensor data streams into a 3.3-V SoC vision processor within an automotive camera ECU. IC Role / Device Role / Timing Role: High-reliability bus translator with A-port tied to sensor domain (VCCA = 1.5 V), B-port to processor (VCCB = 3.3 V). Use Value: Overvoltage tolerance protects against transient coupling on long sensor harnesses; -40°C to 85°C rating supports under-hood operation. |
Use Scenario: Isolating 2.5-V microcontroller GPIOs from 24-V industrial fieldbus transceivers via optocoupler-driven level-shifted control lines. IC Role / Device Role / Timing Role: Voltage-translating buffer for digital control signals, leveraging OE to gate communication during fault conditions. Use Value: 3-state outputs enable clean bus arbitration; Ioff ensures no leakage path when microcontroller is in deep sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVCH16T245DGGR | 16-bit, dual-supply, but uses AVCH logic family with lower drive (±12 mA) and no DOC™ circuitry; supports 1.2-V min VCC. | Better suited for ultra-low-power, sub-1.5-V systems where noise reduction is secondary to static current minimization. | Select when VCC rails extend below 1.4 V or when lower ICCQ justifies reduced drive/noise performance. |
| TXB0108PWR | 8-bit auto-direction-sensing translator; no DIR/OE pins; relies on bus activity for direction detection; max 3.3-V VCCB, no 3.6-V support. | Ideal for I²C/SPI where direction is data-dependent and manual control is undesirable; not suitable for parallel bus protocols requiring explicit DIR control. | Choose only for serial interfaces needing automatic direction sensing - not a functional replacement for parallel bus control. |
Compared with SN74AVCB164245VR, SN74AVCH16T245DGGR trades DOC™-enabled noise control and ±24-mA drive for wider 1.2–3.6-V operation, while TXB0108PWR replaces explicit DIR/OE logic with autonomous direction detection - making it incompatible for synchronous parallel bus applications requiring deterministic control timing.
Availability
SN74AVCB164245VR is available at Aetrix Electronics and suitable for FPGA-to-ASIC interconnects, memory subsystems, and mixed-voltage SoC interfaces requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SN74AVCB164245VR 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 logic solutions, with decades of expertise in high-reliability interface ICs and widebus technology.
The SN74AVCB164245VR belongs to TI's Widebus™ family of advanced bus transceivers, engineered specifically for low-noise, mixed-voltage system interconnects in computing, industrial automation, and automotive electronics.
FAQ
What is the maximum allowable voltage on SN74AVCB164245VR I/O pins when the device is unpowered?
When SN74AVCB164245VR is unpowered (VCCA = VCCB = 0 V), its I/O pins tolerate up to 4.6 V in the high-impedance or power-off state per Absolute Maximum Ratings. This overvoltage tolerance allows safe connection to live buses during power sequencing or hot-swap events without risk of latch-up or damage.
How does the DOC™ circuitry in SN74AVCB164245VR improve signal integrity compared to standard bus transceivers?
The DOC™ circuitry in SN74AVCB164245VR dynamically lowers output impedance at signal transition onset to deliver full ±24-mA drive strength, then raises impedance mid-transition to suppress ringing and reduce simultaneous switching noise. This results in cleaner edges and lower EMI versus fixed-impedance transceivers - verified in TI's SCEA009 application report.
Can SN74AVCB164245VR translate between 1.2-V and 3.3-V logic domains?
No. SN74AVCB164245VR specifies a minimum supply voltage of 1.4 V for both VCCA and VCCB per Recommended Operating Conditions. While some margin may exist, TI does not characterize or guarantee operation at 1.2 V; for 1.2-V interfaces, consider SN74AVCH16T245DGGR instead.
What is the recommended pull-up configuration for OE pins on SN74AVCB164245VR during power-up?
TI recommends tying OE pins to VCCB through a pull-up resistor to ensure high-impedance state at power-up. The minimum resistor value depends on the driver's sink capability; for typical microcontroller GPIOs, 10-kΩ is sufficient. This prevents bus contention before firmware initializes DIR/OE states.
Is SN74AVCB164245VR pin-compatible with other members of the SN74AVCB164245 family?
Yes - SN74AVCB164245VR (TVSOP, DGV) shares identical pinout and function with SN74AVCB164245GR (TSSOP, DGG) and SN74AVCB164245KR (VFBGA, GQL), as confirmed by TI's terminal assignment diagrams and package drawings. Only package dimensions and thermal characteristics differ.
SN74AVCB164245VR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVCB
- 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:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFSOP (0.173", 4.40mm Width)
SN74AVCB164245VR FAQ
1.How can I place an order for SN74AVCB164245VR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVCB164245VR 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 SN74AVCB164245VR reliable?
The price and inventory of SN74AVCB164245VR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVCB164245VR is usually 5 days.
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SN74AVCB164245VR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVCB164245VR 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 SN74AVCB164245VR?
For technical support, including SN74AVCB164245VR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVCB164245VR requirements.
6.How does Aetrix verify that SN74AVCB164245VR is sourced from the original manufacturer or authorized distributors?
All SN74AVCB164245VR 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 SN74AVCB164245VR meets industry standards.
7.What is the process for return or replacement of SN74AVCB164245VR?
All SN74AVCB164245VR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCB164245VR, 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 SN74AVCB164245VR part is unused and in its original packaging.
Return procedure for SN74AVCB164245VR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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