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Texas Instruments SN74AVC16646DGVR
- Part No.:
- SN74AVC16646DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AVC16646DGVR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,951
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Product details
Overview
SN74AVC16646DGVR from Texas Instruments is a 16-bit bus transceiver and register with 3-state outputs, designed for mixed-voltage-mode data communications between 1.2-V to 3.6-V domains. It features Dynamic Output Control (DOC™) for noise reduction without speed degradation, Ioff support for partial-power-down mode, and operates across –40°C to 85°C. Used in high-speed memory interfaces and FPGA-to-ASIC interconnects.
For engineers reviewing the SN74AVC16646DGVR datasheet, SN74AVC16646DGVR pinout, SN74AVC16646DGVR application, or SN74AVC16646DGVR equivalent, key selection criteria include its dual 8-bit or single 16-bit configurable bus management, ±24 mA dynamic drive at 3.3 V, DOC™-enabled transition control, and TVSOP-56 package compatibility with dense PCB layouts.
Technical Context
The SN74AVC16646DGVR implements two independent 8-bit transceiver/register blocks, each with separate clock (CLKAB/CLKBA), direction (DIR), output-enable (OE), and select-control (SAB/SBA) inputs. Its DOC™ circuit dynamically modulates output impedance during signal transitions-initially lowering impedance for strong drive, then raising it to suppress ringing and crosstalk.
It supports true bidirectional data flow with real-time or registered transfer modes, latch-up immunity >100 mA per JESD 78 Class II, and overvoltage-tolerant I/Os up to 4.6 V. The device is fully characterized for 1.2-V to 3.6-V operation but optimized for 1.65-V to 3.6-V VCC, enabling interoperability across legacy and low-voltage logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.2 V to 3.6 V - enables direct interfacing between 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters |
| Dynamic Drive | ±24 mA at 3.3 V - matches standard-output drive strength while maintaining low-noise operation via DOC™ |
| Propagation Delay | 2.6 ns typical at 3.3 V - supports >350 MHz clock frequency for high-throughput data transfers |
| Ioff Current | ±10 µA max - prevents backflow current during partial power-down, protecting powered-down subsystems |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded systems and communications equipment |
| Output Enable Time | 4.0 ns typical at 3.3 V - ensures fast bus arbitration and minimal dead time in multiplexed data paths |
| Input Thresholds | VIL = 0.35×VCC, VIH = 0.65×VCC - provides robust noise margin across all supported VCC levels |
Pinout & Package
SN74AVC16646DGVR uses a 56-pin Thin Very Small Outline Package (TVSOP, DGV), 7.7 mm × 4.4 mm footprint, 1.2 mm max height, JEDEC MO-194 compliant, with gull-wing leads and exposed metal pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1DIR, 2DIR | Direction control input | Determines data flow direction per 8-bit block: DIR = L routes B→A; DIR = H routes A→B |
| 1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA | Clock input | Low-to-high edge clocks data from A or B bus into respective register; enables synchronous storage |
| 1SAB, 2SAB, 1SBA, 2SBA | Select control input | Chooses between real-time (transparent) or stored data output without glitch during switching |
| 1OE, 2OE | Output enable | Active-low control: OE = L enables transceiver outputs; OE = H places outputs in high-impedance state |
| A1–A8, B1–B8 (×2) | Data I/O port | 16 bidirectional data lines split into two 8-bit buses; each supports mixed-voltage I/O up to 4.6 V |
| VCC, GND (×8) | Power and ground | Distributed supply/ground pins minimize simultaneous switching noise and improve signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Output Control (DOC™) | Reduces EMI and overshoot by dynamically adjusting output impedance during transitions-no external termination required |
| Ioff Partial-Power-Down Support | Disables outputs when VCC = 0 V, preventing current backflow from live buses into unpowered sections of system |
| Mixed-Voltage I/O Tolerance | Accepts inputs up to 4.6 V regardless of VCC, enabling safe interface between 1.2-V SoCs and 3.3-V peripherals |
| Glitch-Free Select Multiplexing | SAB/SBA logic eliminates decoding glitches during real-time ↔ stored data switching-critical for deterministic timing |
| Widebus™ Architecture | Optimized layout and drive strength for high-density parallel bus applications including memory expansion and FPGA I/O bridging |
Applications
| Memory Expansion Interface | FPGA-to-ASIC Interconnect |
|---|---|
Use Scenario: Expanding DRAM or SRAM capacity on an embedded controller board using a 16-bit data bus. IC Role / Device Role / Timing Role: Acts as a voltage-translating, registered bus transceiver that buffers and synchronizes address/data/control signals between controller and memory. Use Value: Enables reliable 1.8-V controller to 3.3-V memory communication with sub-3 ns propagation delay and no external level shifters. | Use Scenario: Connecting a low-voltage FPGA I/O bank to a higher-voltage ASIC in a reconfigurable compute module. IC Role / Device Role / Timing Role: Provides bidirectional, clocked data transfer with selectable real-time or registered output to meet setup/hold timing across voltage domains. Use Value: Eliminates timing closure issues caused by voltage mismatch and reduces PCB layer count by integrating translation and registration. |
| Industrial PLC Backplane | Test Equipment Signal Routing |
Use Scenario: Managing data exchange between multiple I/O modules on a modular programmable logic controller backplane. IC Role / Device Role / Timing Role: Functions as a fault-isolated, hot-swap-capable bus manager with independent OE and DIR controls per channel. Use Value: Supports live insertion/removal of modules via Ioff protection and maintains bus integrity during partial power-down events. | Use Scenario: Routing high-speed digital stimulus and response signals between test head and DUT in automated test equipment. IC Role / Device Role / Timing Role: Serves as a low-jitter, low-noise bidirectional signal conditioner with programmable data capture windows via CLKAB/CLKBA. Use Value: Achieves <3 ns timing precision and <12 ps jitter contribution, meeting Class B ATE signal integrity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver and register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC16T245DGVR | No internal registers; only transparent transceiver; lacks SAB/SBA select logic and CLK inputs | Suitable for simple level-shifting without storage; not usable where registered sampling or glitch-free multiplexing is required | Choose when only voltage translation and direction control are needed-lower complexity and cost |
| SN74LVC16646DGVR | Slower max clock frequency (200 MHz vs 350 MHz); lower drive (±24 mA only at 3.3 V, not down to 1.2 V); no DOC™ circuit | Compatible for less demanding industrial interfaces but cannot match SN74AVC16646DGVR's noise performance or wide-VCC drive capability | Prefer for cost-sensitive designs where 1.2-V operation or ultra-low EMI are not required |
Compared with SN74AVC16646DGVR, SN74AVC16T245DGVR omits register functionality and select control, limiting use to basic translation, while SN74LVC16646DGVR trades off speed, drive flexibility, and noise control for lower unit cost-making SN74AVC16646DGVR optimal for high-integrity, mixed-voltage, registered bus systems.
Availability
SN74AVC16646DGVR is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA-to-ASIC interconnects, industrial PLC backplanes, and automated test equipment requiring stable component supply and long-term industrial lifecycle support.
Supply support for SN74AVC16646DGVR 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 innovation in high-speed interface ICs and industrial-grade reliability.
The SN74AVC16646DGVR belongs to TI's AVC (Advanced Very-Low-Voltage CMOS) logic family, engineered for robust mixed-voltage system integration with emphasis on noise control, power efficiency, and timing predictability in dense PCB environments.
FAQ
What is the maximum clock frequency supported by the SN74AVC16646DGVR?
The SN74AVC16646DGVR supports a maximum clock frequency of 350 MHz at VCC = 3.3 V, as specified in the switching characteristics table. At lower supply voltages-1.5 V, 1.8 V, and 2.5 V-the max clock frequency is derated to 150 MHz, 250 MHz, and 350 MHz respectively. This performance enables high-throughput data transfers in memory and FPGA interconnect applications where the SN74AVC16646DGVR is deployed.
Does the SN74AVC16646DGVR support partial power-down operation?
Yes, the SN74AVC16646DGVR supports partial power-down operation via its Ioff circuitry. When VCC = 0 V, the Ioff feature disables all outputs and limits leakage current to ±10 µA, preventing damaging current backflow from live I/O buses into the unpowered device. This capability is critical for hot-swap and modular system designs where subsystems may be powered independently, and is explicitly validated per the datasheet's recommended operating conditions.
How does the Dynamic Output Control (DOC™) circuit in the SN74AVC16646DGVR reduce noise?
The DOC™ circuit in the SN74AVC16646DGVR dynamically adjusts output impedance during signal transitions: it initially lowers impedance to deliver strong drive strength (equivalent to ±24 mA), then raises impedance mid-transition to suppress ringing and crosstalk. This eliminates the need for external series resistors or terminations while preserving signal edge rate and timing margins-directly improving signal integrity in high-density routing scenarios where the SN74AVC16646DGVR is applied.
Can the SN74AVC16646DGVR operate at 1.2 V supply voltage?
Yes, the SN74AVC16646DGVR is fully specified to operate at VCC = 1.2 V, with guaranteed functionality across the full –40°C to +85°C temperature range. At 1.2 V, it delivers 150 MHz max clock frequency and meets all electrical characteristics including VOL ≤ 0.2 V and VOH ≥ VCC – 0.2 V. This makes the SN74AVC16646DGVR suitable for ultra-low-power portable and battery-operated systems where the 1.2-V node is used for core logic domains.
What package type is used for the SN74AVC16646DGVR?
The SN74AVC16646DGVR uses a 56-pin Thin Very Small Outline Package (TVSOP), designated DGV, with dimensions 7.7 mm × 4.4 mm and maximum height of 1.2 mm. It complies with JEDEC MO-194, features gull-wing leads, and includes an exposed metal pad for enhanced thermal dissipation. This compact, surface-mount package supports high-density PCB layouts typical in space-constrained industrial and communications equipment where the SN74AVC16646DGVR is implemented.
SN74AVC16646DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AVC
- Package/Case:
- 56-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- 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:
- 56-TVSOP
SN74AVC16646DGVR FAQ
1.How can I place an order for SN74AVC16646DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AVC16646DGVR 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 SN74AVC16646DGVR reliable?
The price and inventory of SN74AVC16646DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AVC16646DGVR is usually 5 days.
3.What payment methods are accepted for SN74AVC16646DGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AVC16646DGVR transactions.
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4.How is shipping managed for SN74AVC16646DGVR?
SN74AVC16646DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AVC16646DGVR 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 SN74AVC16646DGVR?
For technical support, including SN74AVC16646DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AVC16646DGVR requirements.
6.How does Aetrix verify that SN74AVC16646DGVR is sourced from the original manufacturer or authorized distributors?
All SN74AVC16646DGVR 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 SN74AVC16646DGVR meets industry standards.
7.What is the process for return or replacement of SN74AVC16646DGVR?
All SN74AVC16646DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVC16646DGVR, 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 SN74AVC16646DGVR part is unused and in its original packaging.
Return procedure for SN74AVC16646DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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