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Renesas 72V235L10PFG8
- Part No.:
- 72V235L10PFG8
- Manufacturer:
- Renesas
- Category:
- FIFOs Memory
- Package:
- 64-LQFP
- Datasheet:
-
72V235L10PFG8.pdf
- Description:
- IC FIFO SYNC 2KX18 6.5NS 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,843
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Product details
Overview
72V235L10PFG8 from Integrated Device Technology (IDT) is a 3.3 V CMOS synchronous FIFO memory with 2,048 × 18-bit depth and width, 10 ns read/write cycle time, 5 V input tolerance, and dual-clock asynchronous operation capability. It serves as a high-speed data buffer in interprocessor communication and LAN controller interfaces.
For engineers reviewing the 72V235L10PFG8 datasheet, 72V235L10PFG8 pinout, 72V235L10PFG8 application, or 72V235L10PFG8 equivalent, key selection criteria include its FWFT/Standard timing mode configurability, programmable almost-empty/full flag offsets, register-buffered flag options, and TQFP-64 industrial-grade packaging.
Technical Context
The 72V235L10PFG8 implements a clocked dual-port RAM architecture with independent read (RCLK/REN) and write (WCLK/WEN) control paths, supporting both single-clock and fully asynchronous dual-clock operation. Its internal pointer logic manages 2,048-word depth with 18-bit parallel I/O and supports daisy-chain depth expansion via WXI/WXO and RXI/RXO pins.
Flag behavior is determined at reset by FL/RXI/WXI configuration per Table 3, enabling selection between IDT Standard and First Word Fall-Through (FWFT) timing modes, synchronous/asynchronous PAE/PAF timing, and single/double/triple register-buffered EF/FF outputs - all without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Depth × Width | 2,048 × 18-bit - provides 36,864 bits of buffered storage for burst-mode data alignment between mismatched clock domains. |
| Cycle Time | 10 ns - enables up to 100 MHz clock operation, suitable for high-throughput optical disk and network controller buffering. |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V systems; 5 V tolerant inputs eliminate level-shifting requirements for legacy 5 V control signals. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and telecom infrastructure. |
| Package | 64-pin TQFP (PFG) - surface-mount footprint with 0.5 mm pitch, seven GND pins for noise suppression, and thermal performance validated for continuous operation. |
| Flag Architecture | EF/OR, FF/IR, PAE, PAF, HF - five status flags with user-programmable offsets and configurable synchronization (sync/async) and buffering (1×/2×/3×). |
Pinout & Package
72V235L10PFG8 is housed in a 64-lead thin quad flatpack (TQFP), order code PFG, with exposed pad not electrically connected. Pin layout follows JEDEC MO-220 standard; package dimensions are 10 mm × 10 mm × 1.4 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D17 | Data Input Bus | 18-bit parallel input path; accepts 5 V-tolerant logic levels for direct interfacing with mixed-voltage systems. |
| Q0–Q17 | Data Output Bus | 18-bit tristatable output; OE-controlled high-impedance state enables bus sharing in multi-FIFO configurations. |
| WCLK / RCLK | Independent Clock Inputs | Asynchronous clock domains supported; skew tolerance ≥5 ns ensures reliable dual-clock FIFO operation. |
| WEN / REN | Write/Read Enable Controls | Edge-triggered enables synchronized to respective clocks; inhibit writes when FF=LOW or reads when EF=LOW. |
| OE | Output Enable | Active-low control of Q0–Q17 bus; allows shared data bus architectures without external transceivers. |
| RS | Hardware Reset | Asynchronous active-low reset initializes pointers, flags, and offset registers; minimum pulse width 10 ns. |
| LD | Offset Load Control | Enables programming of PAE/PAF offset values via D0–D11 on WCLK edges; required for custom flag thresholds. |
| FL / WXI / RXI | Configuration Inputs | Three-pin truth table (Table 3) sets timing mode (Standard/FWFT), flag sync type, and flag buffering at power-on reset. |
| FF/IR / EF/OR / PAE / PAF / WXO/HF / RXO | Status & Expansion Outputs | Open-drain-compatible flags; HF doubles as half-full indicator or depth-expansion handshake signal. |
| VCC / GND | Power Distribution | One VCC pin per 8 pins (8 total); seven dedicated GND pins minimize ground bounce in high-speed switching. |
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 - reduces latency in real-time streaming applications. |
| User-Programmable Flag Offsets | PAE/PAF thresholds set via LD/WCLK sequence using D0–D11; default offsets (127 words from empty/full) support immediate use without configuration. |
| Configurable Flag Synchronization | PAE/PAF timing selected at reset as synchronous (edge-aligned to RCLK/WCLK) or asynchronous (cross-domain assertion) - eliminates metastability in mixed-clock systems. |
| Register-Buffered Flag Outputs | EF/FF buffering selectable as single/double/triple register stages via FL/RXI/WXI - trades 1–2 clock-cycle flag delay for guaranteed stable edge detection at boundary states. |
| Daisy-Chain Depth Expansion | WXO/RXO pins enable seamless stacking of multiple 72V235L10PFG8 devices to achieve >2,048-word depth without external glue logic or address management. |
Applications
| Optical Disk Controller Buffering | Industrial Ethernet Switch Data Path |
|---|---|
Use Scenario: Absorbs bursty data from CD/DVD read heads and smooths delivery to slower host processors or SATA controllers. IC Role / Device Role / Timing Role: Synchronous FIFO providing depth-matched buffering between 66 MHz ATAPI interface and 25 MHz ARM-based controller. Use Value: 2,048-word capacity prevents overrun during seek operations; 10 ns cycle time sustains peak transfer rates up to 100 MB/s. |
Use Scenario: Temporarily stores frames between PHY-layer MACs and switch fabric ASICs operating at different clock domains. IC Role / Device Role / Timing Role: Dual-clock FIFO decoupling 125 MHz GMII transmit path from 100 MHz internal packet scheduler. Use Value: Asynchronous PAE/PAF flags enable dynamic flow control; FWFT mode reduces first-packet latency by 3 clock cycles. |
| Multi-Processor Communication Link | Medical Imaging Data Acquisition |
Use Scenario: Bridges data streams between DSP and FPGA subsystems in radar signal processing where clock domain isolation is critical. IC Role / Device Role / Timing Role: High-reliability FIFO with triple-register-buffered EF/FF ensuring glitch-free full/empty signaling under EMI stress. Use Value: Industrial temperature rating (–40°C to +85°C) and 3.3 V operation match embedded DSP voltage rails; 5 V tolerant controls simplify FPGA interface. |
Use Scenario: Buffers raw pixel data from 14-bit ADCs before compression in portable ultrasound machines. IC Role / Device Role / Timing Role: Low-power synchronous FIFO managing 80 MSPS pixel stream between sensor interface and ARM Cortex-A9 SoC. Use Value: 30 mA active current (ICC1) and 5 mA standby (ICC2) extend battery life; TQFP-64 package fits compact handheld PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FIFO memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 72V235L15PFG8 | 15 ns cycle time (vs. 10 ns); lower max frequency (66.7 MHz vs. 100 MHz); identical pinout, flags, and feature set. | Suitable for cost-sensitive designs where 100 MHz operation is unnecessary; reduced power consumption at lower clock rates. | Select when system timing budget allows ≥15 ns access; retains full software/hardware compatibility with 72V235L10PFG8. |
| 72V233L10PFG8 | 1,024 × 18-bit depth (half capacity); same 10 ns speed, 3.3 V supply, TQFP-64 package, and flag architecture. | Applicable where buffer depth ≤1,024 words suffices; smaller memory array reduces active current (ICC1 ≈22 mA vs. 30 mA). | Choose for space-constrained or power-optimized implementations needing only 18 Kbit - no PCB or firmware changes required. |
Compared with 72V235L10PFG8, the 72V235L15PFG8 trades speed for lower cost and power, while the 72V233L10PFG8 halves depth without altering timing, packaging, or interface - enabling drop-in optimization for less demanding buffering needs.
Availability
72V235L10PFG8 is available at Aetrix Electronics and suitable for industrial Ethernet switches, medical imaging subsystems, optical storage controllers, and multi-processor communication links requiring stable component supply across extended product lifecycles.
Supply support for 72V235L10PFG8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance dataflow solutions for communications and computing markets.
The IDT72V2xx5 family was designed specifically for low-latency, high-reliability data buffering in mixed-signal and multi-clock embedded systems - emphasizing configurability, industrial robustness, and seamless expandability.
FAQ
What is the memory organization of the 72V235L10PFG8?
The 72V235L10PFG8 features a 2,048 × 18-bit synchronous FIFO memory array, delivering 36,864 bits of buffer capacity. This organization supports 18-bit parallel data paths and is optimized for applications requiring depth-matched buffering between dissimilar clock domains, such as network controllers and digital signal processors. The 72V235L10PFG8 does not support width expansion without external logic.
Does the 72V235L10PFG8 support both single-clock and dual-clock operation?
Yes, the 72V235L10PFG8 supports both configurations: RCLK and WCLK may be tied together for single-clock operation, or run asynchronously for true dual-clock buffering. Its internal pointer logic handles clock domain crossing reliably, with documented skew tolerance of ≥5 ns between clocks. This flexibility makes the 72V235L10PFG8 suitable for bridging interfaces like GMII-to-SoC or ADC-to-FPGA.
How is the First Word Fall-Through (FWFT) mode enabled on the 72V235L10PFG8?
FWFT mode is configured at power-on reset using the FL, RXI, and WXI pin states per Table 3 in the datasheet. For example, asserting FL = LOW, RXI = LOW, and WXI = HIGH selects FWFT mode with triple-register-buffered OR and double-register-buffered IR flags. The 72V235L10PFG8 does not support runtime switching between FWFT and Standard mode - configuration is static after reset.
What are the default programmable flag offset values for the 72V235L10PFG8?
The 72V235L10PFG8 defaults to 127 words from empty for PAE and 127 words from full for PAF - consistent with its 2,048-word depth. These offsets are loaded into internal registers at reset and can be reprogrammed via the LD pin and D0–D11 during normal operation. The 72V235L10PFG8 does not permit reading offset values in FWFT mode; this function is restricted to IDT Standard mode only.
Is the 72V235L10PFG8 RoHS-compliant and green-certified?
Yes, the 72V235L10PFG8 is a green-part variant with lead-free (Pb-free) terminations and RoHS-compliant packaging, as confirmed in IDT's ordering information and material declarations. It replaces legacy SnPb-finished versions discontinued as of June 2018. The 72V235L10PFG8 meets JEDEC J-STD-609A Class 3 moisture sensitivity level (MSL-3) and is qualified for reflow soldering per IPC/JEDEC J-STD-020.
72V235L10PFG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 72V
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Size:
- 36K (2K 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)
72V235L10PFG8 FAQ
1.How can I place an order for 72V235L10PFG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 72V235L10PFG8 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 72V235L10PFG8 reliable?
The price and inventory of 72V235L10PFG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 72V235L10PFG8 is usually 5 days.
3.What payment methods are accepted for 72V235L10PFG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 72V235L10PFG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 72V235L10PFG8?
72V235L10PFG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 72V235L10PFG8 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 72V235L10PFG8?
For technical support, including 72V235L10PFG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 72V235L10PFG8 requirements.
6.How does Aetrix verify that 72V235L10PFG8 is sourced from the original manufacturer or authorized distributors?
All 72V235L10PFG8 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 72V235L10PFG8 meets industry standards.
7.What is the process for return or replacement of 72V235L10PFG8?
All 72V235L10PFG8 units undergo pre-shipment inspection (PSI). If there is an issue with 72V235L10PFG8, 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 72V235L10PFG8 part is unused and in its original packaging.
Return procedure for 72V235L10PFG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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