Renesas 72V225L10PFG8

Overview

IDT72V225L10PFG8 from Integrated Device Technology is a 3.3 V, 10 ns cycle time, 1,024 × 18-bit synchronous FIFO memory IC used for clocked data buffering in dual-clock or single-clock systems. It supports IDT Standard and First Word Fall-Through (FWFT) timing modes, features programmable Almost-Empty/Almost-Full flags, and operates across industrial temperature range (–40°C to +85°C) in a 64-pin TQFP package.

For engineers reviewing the IDT72V225L10PFG8 datasheet, IDT72V225L10PFG8 pinout, IDT72V225L10PFG8 application, or IDT72V225L10PFG8 equivalent, key selection criteria include its 1,024-word depth, 18-bit bus width, 10 ns read/write cycle, 5 V input tolerance, and configurable flag timing-critical for optical disk controllers, LAN interfaces, and interprocessor communication where deterministic latency and depth expansion are required.

Technical Context

This FIFO implements dual-clock architecture with independent WCLK and RCLK domains, enabling asynchronous data transfer between clock domains. Its internal RAM array is paired with register-buffered flag logic (configurable as single/double buffered), offset-loadable PAE/PAF registers, and expansion I/O (WXI/WXO/RXI/RXO) supporting daisy-chain depth expansion.

Timing mode selection (IDT Standard vs FWFT) and flag synchronization (asynchronous/synchronous) are determined at reset via FL/RXI/WXI pin states per Table 3. The device uses high-speed submicron CMOS technology and provides output enable (OE) for three-state bus control, with HF flag active in single-device configurations.

Key Specifications

Pinout & Package

Package: 64-pin thin quad flatpack (TQFP), 10 mm × 10 mm, 0.5 mm pitch, lead finish SnPb (EOL as of June 2018).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FIFO memory applications.

Compared with 72V225L15PFG8 and 72V223L10PFG8, IDT72V225L10PFG8 delivers maximum throughput (100 MHz) and deepest standard buffering (1,024 words) in the same 64-pin TQFP package-making it optimal for high-bandwidth, latency-sensitive applications requiring future depth scalability.

Availability

IDT72V225L10PFG8 is available at Aetrix Electronics and suitable for optical disk controllers, LAN packet buffering, interprocessor communication links, and industrial PLC data pipelines requiring stable component supply and long-term industrial temperature support.

Supply support for IDT72V225L10PFG8 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 signal conditioning ICs, acquired by Renesas Electronics in 2019.

IDT72V225L10PFG8 belongs to the SyncFIFO™ family-designed specifically for high-speed, low-latency, clock-domain-crossing data buffering in storage, networking, and industrial control systems.

FAQ

What is the memory organization of the IDT72V225L10PFG8?

IDT72V225L10PFG8 features a 1,024 × 18-bit synchronous FIFO memory array, meaning it stores 1,024 words of 18-bit data. This configuration provides 18.4 kbits of buffer capacity, optimized for parallel 18-bit data paths common in legacy storage and networking interfaces. The IDT72V225L10PFG8 does not support byte-wide or configurable width modes-its 18-bit bus is fixed.

Does the IDT72V225L10PFG8 support both single-clock and dual-clock operation?

Yes, the IDT72V225L10PFG8 supports both configurations. When WCLK and RCLK are tied together, it operates in single-clock mode with simplified control. When driven independently, it functions as a true dual-clock FIFO-enabling asynchronous data transfer between domains. The IDT72V225L10PFG8 specifies skew tolerances (tSKEW1 = 5 ns, tSKEW2 = 14 ns) to guarantee reliable flag generation under dual-clock conditions.

How is the First Word Fall-Through (FWFT) mode enabled on the IDT72V225L10PFG8?

FWFT mode is selected during power-up or 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 flag buffering and asynchronous PAE/PAF. This configuration must be stable before RS deassertion. Once set, FWFT causes the first written word to appear on Q0–Q17 after three RCLK edges, without requiring REN assertion.

Can the programmable Almost-Empty and Almost-Full flags be customized on the IDT72V225L10PFG8?

Yes, the IDT72V225L10PFG8 allows user-defined PAE and PAF offset values via the LD pin and D0–D11 inputs. With LD and WEN held LOW, successive WCLK edges load empty offset (first edge) and full offset (second edge) into internal registers. Default offsets are 127 words from empty/full; custom values let designers tune buffer watermark thresholds precisely for their application's flow-control requirements.

Is the IDT72V225L10PFG8 still in production given its SnPb lead finish and EOL notice?

Although the SnPb (lead-based) version of IDT72V225L10PFG8 entered End-of-Life with last-time-buy expiring June 15, 2018, RoHS-compliant green variants (e.g., with matte tin finish) remain available through authorized distributors and Aetrix Electronics' inventory channels. The IDT72V225L10PFG8's functionality, timing, and pinout are unchanged between SnPb and green versions-only the surface finish differs.