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Renesas 72V205L10PFG
- Part No.:
- 72V205L10PFG
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 64-LQFP
- Datasheet:
-
72V205L10PFG.pdf
- Description:
- IC FIFO SYNC 256X18 6.5NS 64QFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
72V205L10PFG from Integrated Device Technology (IDT) is a 3.3 V CMOS synchronous FIFO memory with 256 × 18-bit depth and width, supporting dual-clock or single-clock operation, 10 ns read/write cycle time, 5 V input tolerance, and industrial temperature range (–40°C to +85°C). It serves as a high-speed data buffer in optical disk controllers, LAN interfaces, and interprocessor communication links.
For engineers reviewing the 72V205L10PFG datasheet, 72V205L10PFG pinout, 72V205L10PFG application, or 72V205L10PFG equivalent, key selection criteria include its FWFT/Standard timing mode configurability at reset, programmable almost-empty/almost-full flag offsets, register-buffered flag options, and TQFP-64 packaging for board-level integration in timing-critical embedded systems.
Technical Context
The 72V205L10PFG implements a clocked, dual-port RAM array with independent read (RCLK/REN) and write (WCLK/WEN) control paths, enabling asynchronous or coincident clock domains. Its flag logic supports both IDT Standard and First Word Fall-Through (FWFT) modes, selected via FL/RXI/WXI during reset.
It features user-programmable PAE/PAF offset registers loaded via D0–D11 under LD/WEN control, and configurable flag synchronization (asynchronous/synchronous) and buffering (single/double/triple register), directly impacting metastability handling and timing predictability in boundary-state detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 256 × 18-bit - fixed capacity suitable for burst-mode buffering of 18-bit parallel data streams without external address logic. |
| Cycle Time | 10 ns - enables up to 100 MHz clock operation, meeting high-throughput requirements in LAN and storage controller designs. |
| Supply Voltage | 3.3 V ± 0.3 V - compatible with modern low-voltage logic families while maintaining 5 V input tolerance on all control/data pins. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and network infrastructure equipment. |
| Package | 64-pin TQFP (PFG suffix) - surface-mount footprint with 0.5 mm pitch, seven GND pins for noise suppression, and thermal performance validated per JEDEC standards. |
| Flag Configuration | Programmable PAE/PAF offsets and selectable synchronous/asynchronous timing - allows precise buffer occupancy monitoring aligned with system-level flow control protocols. |
Pinout & Package
72V205L10PFG is housed in a 64-lead thin quad flatpack (TQFP) package, designated by the "PFG" suffix, with 0.5 mm lead pitch and exposed thermal pad (non-electrical). The package provides seven dedicated ground pins (pins 3, 10, 14, 21, 28, 35, 42) and four VCC pins (pins 9, 16, 23, 30) for robust power distribution and signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D17 | Data Input Bus | 18-bit parallel input path; accepts 5 V-tolerant signals, eliminating level-shifting in mixed-voltage systems. |
| Q0–Q17 | Data Output Bus | 18-bit tristatable output; controlled by OE and RCLK/REN, enabling shared bus architectures. |
| WCLK / RCLK | Independent Clock Inputs | Supports fully asynchronous dual-clock operation or synchronized single-clock mode when tied together. |
| WEN / REN | Enable Controls | Edge-triggered gating: data latched only on active clock edges when respective enable is asserted LOW. |
| LD | Offset Register Load Control | Activates loading of PAE/PAF offset values from D0–D11 into internal registers on WCLK/RCLK edges. |
| FL / RXI / WXI | Configuration Inputs | Determine timing mode (Standard/FWFT), flag synchronization (sync/async), and flag buffering (single/double/triple) at reset. |
| FF/IR / EF/OR / PAF / PAE / HF | Status Flag Outputs | Real-time occupancy indicators: FF/IR (full/input-ready), EF/OR (empty/output-ready), PAF/PAE (programmable thresholds), HF (half-full). |
Key Features
| Feature | Design Value |
|---|---|
| First Word Fall-Through (FWFT) Mode | Delivers first written word to Q-bus after three RCLK edges without requiring REN assertion-reducing latency in real-time streaming applications. |
| Programmable Almost-Empty/Full Offsets | Default PAE = 31 from empty, PAF = 31 from full; user-loadable via D0–D11 and LD/WEN-enables custom flow-control thresholds matching host processor response time. |
| Configurable Flag Synchronization | Selectable synchronous (edge-aligned to RCLK/WCLK) or asynchronous (cross-domain assertion) PAE/PAF timing-supports deterministic flag behavior across clock domains. |
| Register-Buffered Flags | Single/double/triple buffering available for EF/FF (Standard) or OR/IR (FWFT)-eliminates metastability in boundary-state detection at cost of 1–3 clock-cycle latency. |
| Depth/Width Expandability | Daisy-chain expansion using WXO/RXO outputs and WXI/RXI inputs-enables scalable buffer depth beyond 256 words without external logic. |
Applications
| Optical Disk Controller Buffering | Industrial Ethernet Switch Interface |
|---|---|
|
Use Scenario: Buffering bursty ATAPI/SCSI command and status data between host controller and optical drive ASIC. IC Role / Device Role / Timing Role: Synchronous FIFO providing elastic storage between mismatched clock domains (host CPU vs. drive motor control logic). Use Value: 10 ns cycle time ensures sub-100 ns latency for command handshaking; FWFT mode delivers immediate visibility of first command word, accelerating command dispatch. |
Use Scenario: Isolating MAC-layer transmit/receive data paths in multi-port industrial Ethernet switches operating at 100 Mbps. IC Role / Device Role / Timing Role: Dual-clock FIFO decoupling PHY-side MII clock from switch fabric clock, preventing timing violations during traffic bursts. Use Value: 5 V input tolerance allows direct interfacing with legacy 5 V PHYs; programmable PAF/PAE enables dynamic backpressure signaling to upstream traffic managers. |
| Interprocessor Communication Link | Real-Time Motion Control Data Pipeline |
|
Use Scenario: Exchanging position setpoints and encoder feedback between dual-core motion controller and FPGA-based servo driver. IC Role / Device Role / Timing Role: Low-latency, deterministic data conduit with guaranteed flag timing for handshake-free data transfer. Use Value: Configurable flag buffering (double-register) eliminates metastability risk on EF/FF transitions during rapid start/stop sequences; industrial temp rating ensures reliability in motor cabinet environments. |
Use Scenario: Staging interpolated trajectory points from DSP to high-speed PWM generator in CNC machine tool axis control. IC Role / Device Role / Timing Role: Synchronous buffer synchronizing deterministic DSP output rate with variable PWM update frequency. Use Value: Half-Full (HF) flag triggers early refill to prevent underrun; 256 × 18-bit depth accommodates 128-point 18-bit position/velocity profiles with margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 72V205L15PFG | 15 ns cycle time (vs. 10 ns); lower max frequency (66.7 MHz vs. 100 MHz); identical pinout, voltage, and feature set. | Suitable where timing margin permits relaxed clock rates; reduces power consumption (ICC1 typ. lower) in non-latency-critical buffering. | Select 72V205L10PFG when 100 MHz operation or <10 ns access is required; choose 72V205L15PFG for cost-sensitive or thermally constrained designs. |
| 72V205L20PFG | 20 ns cycle time (vs. 10 ns); max frequency 50 MHz; same package, I/O structure, and configuration logic. | Targeted at legacy systems with slower clocks or where extended setup/hold margins simplify PCB layout and signal integrity validation. | Use 72V205L20PFG only if system clock ≤50 MHz; 72V205L10PFG remains optimal for new designs demanding peak throughput and minimal latency. |
Compared with 72V205L15PFG and 72V205L20PFG, the 72V205L10PFG delivers the highest bandwidth (100 MHz), lowest latency (6.5 ns tA), and tightest timing margins-making it the sole choice for applications requiring maximum FIFO throughput without compromising determinism or expandability.
Availability
72V205L10PFG is available at Aetrix Electronics and suitable for optical disk controllers, industrial Ethernet switches, interprocessor communication links, and real-time motion control systems requiring stable component supply and long-term industrial-grade availability.
Supply support for 72V205L10PFG 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
Integrated Device Technology (IDT) is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions, acquired by Renesas Electronics in 2019.
The IDT72V2xx family was designed specifically for high-speed, low-power synchronous data buffering in industrial and communications infrastructure-emphasizing configurability, clock domain isolation, and robust flag signaling for deterministic system-level data flow control.
FAQ
What is the operating voltage range for the 72V205L10PFG?
The 72V205L10PFG operates from 3.0 V to 3.6 V at VCC, with full 5 V input tolerance on all digital inputs (D0–D17, WCLK, RCLK, WEN, REN, LD, RS, FL, RXI, WXI, OE). This allows direct interfacing with legacy 5 V logic while maintaining low-power 3.3 V core operation-critical for mixed-voltage industrial systems.
How does the First Word Fall-Through (FWFT) mode differ from IDT Standard mode in the 72V205L10PFG?
In FWFT mode, the first word written to an empty 72V205L10PFG appears on Q0–Q17 after three RCLK edges without requiring REN assertion; in IDT Standard mode, REN must be asserted and a rising RCLK edge applied to shift the first word out. FWFT reduces read latency in streaming applications, while Standard mode offers stricter control over output timing.
Can the 72V205L10PFG be used in daisy-chain depth expansion configurations?
Yes-the 72V205L10PFG supports daisy-chain depth expansion using WXO/HF and RXO outputs connected to WXI and RXI inputs of subsequent devices. FL is grounded on the first device and pulled HIGH on all others. This enables scalable buffer depth beyond 256 words while preserving single-device timing behavior and flag semantics.
What are the default programmable flag offset values for the 72V205L10PFG?
The 72V205L10PFG defaults to PAE = 31 words from empty and PAF = 31 words from full at reset. These offsets are loaded into internal registers and can be reprogrammed via D0–D11 under LD/WEN control. The default values ensure conservative flow control thresholds that prevent premature flag assertion during transient buffer conditions.
Does the 72V205L10PFG support both synchronous and asynchronous timing for its programmable flags?
Yes-the 72V205L10PFG allows selection of synchronous or asynchronous timing for PAE and PAF flags via FL/RXI/WXI configuration at reset. In synchronous mode, PAE updates only on RCLK edges and PAF only on WCLK edges; in asynchronous mode, PAE asserts on RCLK and resets on WCLK, and vice versa for PAF-providing flexibility for cross-domain signaling integrity.
72V205L10PFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 72V
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 4.5K (256 x 18)
- Function:
- Synchronous
- Data Rate:
- 100MHz
- Access Time:
- 6.5ns
- Voltage - Supply:
- 3 V ~ 3.6 V
- Current - Supply (Max):
- 30mA
- Bus Directional:
- Uni-Directional
- Expansion Type:
- Depth, Width
- Programmable Flags Support:
- Yes
- Retransmit Capability:
- No
- FWFT Support:
- Yes
- Operating Temperature:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP (14x14)
72V205L10PFG FAQ
1.How can I place an order for 72V205L10PFG through Aetrix?
Please submit a Request for Quotation (RFQ) for 72V205L10PFG 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 72V205L10PFG reliable?
The price and inventory of 72V205L10PFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72V205L10PFG is usually 5 days.
3.What payment methods are accepted for 72V205L10PFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 72V205L10PFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 72V205L10PFG?
72V205L10PFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 72V205L10PFG 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 72V205L10PFG?
For technical support, including 72V205L10PFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72V205L10PFG requirements.
6.How does Aetrix verify that 72V205L10PFG is sourced from the original manufacturer or authorized distributors?
All 72V205L10PFG 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 72V205L10PFG meets industry standards.
7.What is the process for return or replacement of 72V205L10PFG?
All 72V205L10PFG units undergo pre-shipment inspection (PSI). If there is an issue with 72V205L10PFG, 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 72V205L10PFG part is unused and in its original packaging.
Return procedure for 72V205L10PFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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