Renesas 72V235L10PFG

Overview

72V235L10PFG from Integrated Device Technology (IDT) is a 3.3 V CMOS synchronous FIFO memory with 2,048 × 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 72V235L10PFG datasheet, 72V235L10PFG pinout, 72V235L10PFG application, or 72V235L10PFG equivalent, key selection considerations include its FWFT/Standard timing mode configurability, programmable almost-empty/empty flags, register-buffered flag options, and TQFP-64 packaging for board-level integration in real-time data flow systems.

Technical Context

The 72V235L10PFG implements a clocked, dual-port RAM architecture with independent read (RCLK/REN) and write (WCLK/WEN) control paths, enabling asynchronous or coincident clock operation. Its flag logic supports both IDT Standard and First Word Fall-Through (FWFT) modes, selected at reset via FL/RXI/WXI pin states.

It features user-programmable offset registers for PAE and PAF flags, configurable synchronous/asynchronous flag timing, and selectable single/double/triple register-buffering for EF/FF (or OR/IR in FWFT mode), directly impacting metastability immunity and flag latency in boundary-state detection.

Key Specifications

Pinout & Package

72V235L10PFG is housed in a 64-lead thin quad flatpack (TQFP) package with exposed pad, measuring 10 mm × 10 mm × 1.4 mm (JEDEC MS-026), designed for thermal dissipation and PCB routing efficiency in dense layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 72V235L10PFG, the 72V235L15PFG trades speed for relaxed timing margins and lower power, while the 72V233L10PFG retains identical performance but halves buffer depth-both require no PCB changes but differ in data retention capability and bandwidth ceiling.

Availability

72V235L10PFG is available at Aetrix Electronics and suitable for industrial automation, network infrastructure, and real-time embedded systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for 72V235L10PFG 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. IDT pioneered high-speed FIFO and clock management ICs for data-intensive systems.

The IDT72V2xx5 family-including 72V235L10PFG-was engineered for deterministic, low-latency data buffering in mixed-signal and multi-clock embedded systems, targeting optical storage, industrial networking, and real-time control applications.

FAQ

What is the memory organization of the 72V235L10PFG?

The 72V235L10PFG implements a 2,048 × 18-bit synchronous FIFO memory array, providing 36,864 bits of total storage. This configuration supports 18-bit parallel data paths and is optimized for high-speed buffering between asynchronous clock domains. The 72V235L10PFG uses dedicated read and write pointer logic to manage data flow without external address management.

Does the 72V235L10PFG support both single-clock and dual-clock operation?

Yes, the 72V235L10PFG supports both configurations: RCLK and WCLK can be tied together for single-clock operation, or driven independently for true dual-clock asynchronous buffering. Its internal logic guarantees correct flag behavior and data integrity regardless of clock relationship, provided setup/hold and skew timing requirements are met per the datasheet.

How is the First Word Fall-Through (FWFT) mode enabled on the 72V235L10PFG?

FWFT mode is configured during hardware reset (RS LOW) using the FL, RXI, and WXI pin states per Table 3 in the datasheet. For example, FL=0, RXI=0, WXI=1 selects FWFT mode with triple-buffered OR and double-buffered IR flags. The 72V235L10PFG does not support runtime switching-mode selection is static at power-up/reset.

What are the default programmable flag offset values for the 72V235L10PFG?

The 72V235L10PFG defaults to PAE = 127 words from empty and PAF = 127 words from full at reset. These offsets are loaded into internal registers and can be reprogrammed via LD/WEN-controlled writes to D0–D11. The 72V235L10PFG supports reading back current offset values through Q0–Q11 when LD and REN are asserted LOW.

Is the 72V235L10PFG compatible with 5 V logic interfaces?

Yes-the 72V235L10PFG features 5 V-tolerant inputs on all control and data pins (D0–D17, WCLK, RCLK, WEN, REN, RS, LD, FL, WXI, RXI), allowing direct connection to 5 V CMOS/TTL devices without level-shifting circuitry. Its core operates at 3.3 V, but input structures withstand up to 5.5 V, simplifying mixed-voltage system integration.