Renesas 72V225L10TFG8

Overview

72V225L10TFG8 from Integrated Device Technology (IDT) is a 3.3 V, 1,024 × 18-bit synchronous FIFO memory IC with 10 ns read/write cycle time, dual-clock operation support, and programmable Almost-Empty/Almost-Full flags. It operates across industrial temperature range (–40°C to +85°C) and is used in optical disk controllers, LAN interface buffers, and interprocessor communication links where deterministic latency and depth-expandable data buffering are required.

For engineers reviewing the 72V225L10TFG8 datasheet, 72V225L10TFG8 pinout, 72V225L10TFG8 application, or 72V225L10TFG8 equivalent, key selection criteria include its FWFT/Standard timing mode configurability, 18-bit bidirectional data width, 3.3 V supply with 5 V input tolerance, and TQFP-64 packaging for high-density PCB layouts.

Technical Context

The 72V225L10TFG8 implements a clocked, dual-port RAM array with independent read and write pointer logic, supporting both asynchronous and coincident RCLK/WCLK operation. Its flag generation logic includes register-buffered EF/OR and FF/IR outputs plus user-programmable PAE/PAF with configurable synchronous/asynchronous timing via FL/RXI/WXI pins at reset.

It features offset-register loading via D0–D11 and LD/WEN control, enabling runtime reconfiguration of empty/full thresholds. The device supports depth expansion via daisy-chained WXO/RXO signals and width expansion using parallel data buses - all implemented in high-speed submicron CMOS technology.

Key Specifications

Pinout & Package

72V225L10TFG8 is housed in a 64-lead thin quad flatpack (TQFP), order code TF, with exposed pad not electrically connected. Pin spacing is 0.5 mm; body size is 10 mm × 10 mm × 1.4 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 72V225L10TFG8, the L15 and L20 variants trade raw speed for lower power and broader timing margins - making them viable alternatives in non-critical throughput applications while preserving PCB layout, firmware, and system-level integration effort.

Availability

72V225L10TFG8 is available at Aetrix Electronics and suitable for optical disk controllers, LAN interface buffers, and interprocessor communication links requiring stable component supply and long-term industrial-grade availability.

Supply support for 72V225L10TFG8 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 power management solutions for communications, computing, and industrial markets.

The IDT72V2xx family was designed to deliver high-speed, low-power synchronous FIFO buffering for data-intensive embedded systems requiring deterministic latency and flexible clock-domain bridging.

FAQ

What is the memory organization of the 72V225L10TFG8?

The 72V225L10TFG8 implements a 1,024 × 18-bit synchronous FIFO memory array, providing 18,432 bits of buffer storage. This configuration supports 18-bit parallel data paths commonly used in MII Ethernet interfaces, video pixel pipelines, and industrial control buses. Each word is independently addressable via internal read/write pointers managed by WCLK and RCLK.

Does the 72V225L10TFG8 support both single-clock and dual-clock operation?

Yes, the 72V225L10TFG8 supports both configurations: RCLK and WCLK may be tied together for single-clock operation, or run asynchronously for true clock-domain crossing. In dual-clock mode, the device maintains independent pointer tracking and uses skew-tolerant flag timing (tSKEW1 ≥ 5 ns) to ensure reliable status reporting across domains.

How is the First Word Fall-Through (FWFT) mode enabled on the 72V225L10TFG8?

FWFT mode is selected during hardware reset (RS low) by asserting specific logic levels on FL, RXI, and WXI pins per Table 3 in the datasheet - for example, FL=0, RXI=0, WXI=1 configures FWFT with triple-buffered OR and double-buffered IR. The mode persists until next reset and affects EF/OR, FF/IR behavior and PAE/PAF timing.

What is the purpose of the LD pin on the 72V225L10TFG8?

The LD (Load) pin enables programming of the internal empty and full offset registers that control PAE and PAF trigger points. With LD and WEN held low, data on D0–D11 is loaded into the empty offset register on the first WCLK rising edge, then into the full offset register on the next WCLK edge - allowing runtime adjustment of buffer threshold levels.

Can the 72V225L10TFG8 be used in depth-expansion configurations?

Yes, the 72V225L10TFG8 supports daisy-chain depth expansion using WXO and RXO pins. In this configuration, FL is grounded on the first device and pulled high on subsequent devices; WXO of each device connects to WXI of the next, and RXO to RXI - enabling seamless concatenation of multiple 1,024-word buffers without external logic.