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Renesas 72V225L10PFG
- Part No.:
- 72V225L10PFG
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 64-LQFP
- Datasheet:
-
72V225L10PFG.pdf
- Description:
- IC FIFO SYNC 1KX18 6.5NS 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,495
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Product details
Overview
72V225L10PFG from Integrated Device Technology (IDT) is a 3.3 V CMOS synchronous FIFO memory with 1,024 × 18-bit depth and width, 10 ns read/write cycle time, 5 V input tolerance, and industrial temperature range (–40°C to +85°C), used for data buffering in LAN controllers, interprocessor communication, and optical disk interfaces.
For engineers reviewing the 72V225L10PFG datasheet, 72V225L10PFG pinout, 72V225L10PFG application, or 72V225L10PFG equivalent, key selection criteria include dual-clock operation support, programmable almost-empty/empty flags, FWFT vs. IDT Standard timing mode configuration, and TQFP-64 package compatibility with depth/width expansion via XI/XO pins.
Technical Context
The 72V225L10PFG implements a clocked, dual-port FIFO architecture with independent read (RCLK/REN) and write (WCLK/WEN) clocks, supporting both asynchronous and coincident clocking. It features register-buffered EF/FF flags (configurable single/double/triple), programmable PAE/PAF offsets loaded via LD/D0–D11, and HF flag for half-full detection.
Timing mode (IDT Standard or First Word Fall Through) and flag synchronization (asynchronous/synchronous) are determined at reset by FL/RXI/WXI pin states per Table 3. Flag behavior differs fundamentally between modes: EF/OR and FF/IR functions swap roles, and PAE/PAF assertion logic depends on clock domain alignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 1,024 × 18-bit (18.4 kbit total); enables high-throughput 18-bit parallel data buffering without external width expansion. |
| Cycle Time | 10 ns; supports up to 100 MHz clock frequency for real-time streaming in high-speed interfaces. |
| Supply Voltage | +3.3 V ±0.3 V; compatible with modern low-voltage digital systems 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 telecom infrastructure. |
| Package | 64-pin TQFP (Pb-free, green compliant); surface-mount footprint with 0.5 mm pitch, suitable for dense PCB layouts. |
| Flag Configuration | Single/double register-buffered EF/FF and programmable PAE/PAF; mitigates metastability in boundary conditions while enabling custom full/empty thresholds. |
| Timing Modes | IDT Standard and First Word Fall Through (FWFT); FWFT delivers immediate output visibility after first write, reducing latency in burst-read applications. |
Pinout & Package
72V225L10PFG is housed in a 64-lead thin quad flatpack (TQFP) with exposed pad, measuring 10 mm × 10 mm × 1.4 mm. Pin 1 is marked by a corner notch; pin numbering follows standard counter-clockwise sequence from top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D17 | Data Input Bus | 18-bit parallel input path; accepts 5 V-tolerant signals for seamless interfacing with mixed-voltage systems. |
| Q0–Q17 | Data Output Bus | 18-bit tristatable output; controlled by OE and RCLK/REN; outputs valid data only when FIFO not empty and OE low. |
| WCLK / RCLK | Independent Clock Inputs | Asynchronous or synchronous clock domains; WCLK drives write pointer, RCLK drives read pointer and output register. |
| WEN / REN | Enable Controls | Active-low gating: WEN LOW enables write on WCLK rising edge; REN LOW enables read on RCLK rising edge. |
| OE | Output Enable | Active-low control of Q0–Q17 bus; places outputs in high-impedance state when HIGH, enabling bus sharing. |
| RS | Master Reset | Active-low global reset; initializes pointers, flags (EF=LOW, FF=HIGH in Standard mode), and offset registers to defaults. |
| LD | Offset Load Control | Active-low signal enabling loading of PAE/PAF offset values from D0–D11 into internal registers on WCLK/RCLK edges. |
| FL / WXI / RXI | Configuration Inputs | Three-pin truth table (Table 3) sets timing mode (Standard/FWFT), flag buffering, and PAE/PAF sync/asynch behavior at power-on reset. |
| FF/IR / EF/OR / PAE / PAF / WXO/HF / RXO | Status & Expansion Flags | FF/IR indicates full/input-ready; EF/OR indicates empty/output-ready; PAE/PAF indicate configurable thresholds; WXO/HF provides half-full or daisy-chain pulse; RXO enables read-chain propagation. |
| VCC / GND | Power & Ground | One +3.3 V supply pin and seven ground pins distributed across package for low-noise, stable operation and reduced EMI. |
Key Features
| Feature | Design Value |
|---|---|
| 10 ns cycle time with 100 MHz max clock | Enables real-time buffering in high-bandwidth applications like Gigabit Ethernet MAC interfaces without pipeline stalls. |
| 5 V tolerant inputs on all pins | Eliminates level-shifting circuitry when interfacing with legacy 5 V controllers or FPGAs, reducing BOM count and layout complexity. |
| Configurable FWFT or IDT Standard timing | FWFT mode reduces first-word latency to ≤3 RCLK cycles; IDT Standard mode ensures strict control over output visibility for deterministic protocol stacks. |
| Programmable PAE/PAF offsets via LD/D0–D11 | Allows dynamic adjustment of buffer watermark thresholds in firmware-e.g., setting PAE=64 for early DMA trigger in embedded audio subsystems. |
| Dual-clock asynchronous operation with skew tolerance | tSKEW1 = 5 ns (FF/EF), tSKEW2 = 14 ns (PAE/PAF); supports robust cross-domain handshaking between independent clock domains (e.g., PCIe root complex ↔ endpoint). |
| Depth/width expandability via XI/XO daisy chain | Enables building 2K×18, 4K×18, or 1K×36 buffers using multiple 72V225L10PFG devices without external logic or glue ICs. |
Applications
| LAN Controller Buffering | Interprocessor Communication |
|---|---|
Use Scenario: Buffering packet payloads between MAC and PHY layers in 10/100 Mbps Ethernet controllers. IC Role / Device Role / Timing Role: Synchronous FIFO decouples MAC transmit clock from PHY receive clock, absorbing jitter and preventing overrun/underrun. Use Value: 1,024×18 capacity absorbs worst-case back-to-back frame bursts; 10 ns cycle time sustains line-rate throughput without stalling the MAC pipeline. | Use Scenario: Exchanging command/status data between dual-core DSP and ARM host processor in real-time motor control systems. IC Role / Device Role / Timing Role: Dual-clock FIFO isolates processors operating on independent clocks (e.g., 150 MHz DSP core, 200 MHz ARM bus), enabling lock-free handshaking. Use Value: Programmable PAE/PAF flags trigger DMA transfers at optimal fill levels; FWFT mode minimizes latency for urgent status updates. |
| Optical Disk Controller Interface | Industrial PLC Data Acquisition |
Use Scenario: Temporarily storing sector data during CD/DVD read/write operations where spindle speed varies and data stream is non-uniform. IC Role / Device Role / Timing Role: High-speed FIFO absorbs speed mismatches between optical head sampling rate and host controller bus bandwidth. Use Value: Industrial temperature rating (–40°C to +85°C) ensures reliability inside enclosed drive enclosures; 5 V tolerant inputs interface directly with legacy servo ASICs. | Use Scenario: Aggregating analog input samples from 16-channel ADCs before batch transfer to FPGA-based processing engine in modular I/O modules. IC Role / Device Role / Timing Role: Synchronous FIFO acts as elastic buffer between oversampling ADC clock domain and deterministic FPGA processing clock. Use Value: Half-full (HF) flag triggers early interrupt for predictable latency; single-register EF/FF flags reduce flag assertion delay for fast response to buffer exhaustion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 72V225L15PFG | 15 ns cycle time (66.7 MHz max), higher ICC1 (≤30 mA vs. ≤25 mA typical), same pinout and feature set. | Suitable for cost-sensitive designs where 100 MHz operation is unnecessary; lower power in standby (ICC2 ≤5 mA same). | Select when system clock ≤66.7 MHz and thermal budget is constrained; no PCB changes required. |
| 72V223L10PFG | 512 × 18-bit organization (half depth), identical 10 ns timing, same TQFP-64 package and pin compatibility. | Used where buffer depth ≤512 words suffices-e.g., short-packet protocols or memory-constrained microcontrollers. | Choose for space-optimized designs needing less than 1K-word depth; shares footprint and control logic but requires software buffer size adjustment. |
Compared with 72V225L10PFG, the 72V225L15PFG trades speed for marginally lower active current, while the 72V223L10PFG halves depth without altering timing or layout-enabling scalable buffer sizing across product variants with shared hardware design.
Availability
72V225L10PFG is available at Aetrix Electronics and suitable for LAN controllers, interprocessor communication links, and optical disk interface designs requiring stable component supply, long-term industrial temperature support, and drop-in replacement capability for legacy IDT FIFOs.
Supply support for 72V225L10PFG 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) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019.
The IDT72V2xx family was designed for high-reliability, low-latency data buffering in industrial and telecom infrastructure-emphasizing dual-clock flexibility, programmable flags, and robust 3.3 V CMOS operation.
FAQ
What is the memory depth and width of the 72V225L10PFG?
The 72V225L10PFG is a 1,024 × 18-bit synchronous FIFO, providing 18.4 kbits of buffer storage. Its 18-bit data path matches common parallel bus widths in networking and industrial controllers, and its 1K-depth supports burst-mode data transfers without overflow in typical real-time applications. This exact organization is confirmed in the device's functional description and AC electrical tables.
Does the 72V225L10PFG support both single-clock and dual-clock operation?
Yes, the 72V225L10PFG supports both configurations: RCLK and WCLK may be tied together for single-clock operation, or run asynchronously for independent read/write domains. The datasheet explicitly states that "Read Clock (RCLK) can be tied to the Write Clock for single clock operation or the two clocks can run asynchronous of one another for dual-clock operation," and specifies skew timing limits for dual-clock use.
How is the First Word Fall Through (FWFT) mode configured on the 72V225L10PFG?
FWFT mode is selected at power-on reset by asserting specific logic levels on FL, RXI, and WXI pins per Table 3 in the datasheet-specifically FL=0, RXI=0, WXI=1 configures FWFT with triple/double register-buffered OR/IR flags and asynchronous PAE/PAF. This configuration is latched during RS assertion and remains active until next reset; no runtime reconfiguration is supported.
What is the default offset value for the Programmable Almost-Empty (PAE) flag in the 72V225L10PFG?
The default PAE offset for the 72V225L10PFG is 127 words from empty, as stated in footnotes of Tables 1 and 2 and confirmed in the "Programmable Flag Loading" section. This value is loaded into the offset register at reset and can be modified via LD/D0–D11 during normal operation-ensuring consistent startup behavior across all IDT72V225/235/245 variants.
Is the 72V225L10PFG RoHS-compliant and lead-free?
Yes, the 72V225L10PFG is a green, Pb-free part. The datasheet notes "Green parts available, see ordering information" and specifies SnPb lead finish as end-of-life (EOL) with last-time-buy expired June 2018-confirming that current production uses RoHS-compliant matte tin termination. The "PFG" suffix aligns with IDT's green packaging nomenclature for TQFP devices.
72V225L10PFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 72V
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Size:
- 18K (1K 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)
72V225L10PFG FAQ
1.How can I place an order for 72V225L10PFG through Aetrix?
Please submit a Request for Quotation (RFQ) for 72V225L10PFG 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 72V225L10PFG reliable?
The price and inventory of 72V225L10PFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72V225L10PFG is usually 5 days.
3.What payment methods are accepted for 72V225L10PFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 72V225L10PFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 72V225L10PFG?
72V225L10PFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 72V225L10PFG 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 72V225L10PFG?
For technical support, including 72V225L10PFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72V225L10PFG requirements.
6.How does Aetrix verify that 72V225L10PFG is sourced from the original manufacturer or authorized distributors?
All 72V225L10PFG 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 72V225L10PFG meets industry standards.
7.What is the process for return or replacement of 72V225L10PFG?
All 72V225L10PFG units undergo pre-shipment inspection (PSI). If there is an issue with 72V225L10PFG, 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 72V225L10PFG part is unused and in its original packaging.
Return procedure for 72V225L10PFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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