Renesas 72V36110L7-5PFGI

Overview

72V36110L7-5PFGI from IDT (now Renesas) is a 3.3 V, 131,072 × 36-bit high-density SuperSync II™ synchronous/asynchronous FIFO with independent read/write clocks, 133.3 MHz max clock frequency, 5 V input-tolerant control inputs, and industrial temperature range (–40°C to +85°C). It enables depth/width expansion in network buffering and video frame synchronization systems.

For engineers reviewing the 72V36110L7-5PFGI datasheet, 72V36110L7-5PFGI pinout, 72V36110L7-5PFGI application, or 72V36110L7-5PFGI equivalent, key selection criteria include bus-matching flexibility (x36/x18/x9), FWFT vs. Standard timing mode, programmable almost-empty/full flag offsets, zero-latency retransmit capability, and PBGA/CABGA JTAG boundary-scan support.

Technical Context

This FIFO implements dual-clock architecture with fully independent RCLK and WCLK domains supporting simultaneous read/write at up to 133.3 MHz. Its internal RAM array is organized as 131,072 words × 36 bits, with configurable bus widths on both ports via IW, OW, and BM pins during Master Reset.

It supports two primary timing modes-Standard and First Word Fall Through (FWFT)-selected by FWFT/SI at reset; FWFT enables immediate output of the first written word after three RCLK edges without REN assertion. Programmable flags (PAE/PAF) operate synchronously or asynchronously based on PFM pin state, with eight default offset settings selectable via FSEL0/FSEL1/LD.

Key Specifications

Pinout & Package

72V36110L7-5PFGI is packaged in a 144-pin Plastic Ball Grid Array (PBGA), order code BB144, 1 mm pitch, 13 mm × 13 mm footprint. This package includes JTAG (TCK/TMS/TDO/TDI/TRST) and asynchronous port enable (ASYR/ASYW) features not available in TQFP variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 72V36110L7-5PFGI, the TQFP-based 72V36110L7-5PFI sacrifices JTAG and asynchronous port control for lower cost and smaller footprint, while the faster 72V36110L6PFGI delivers higher throughput at the expense of marginally increased power and stricter layout constraints.

Availability

72V36110L7-5PFGI is available at Aetrix Electronics and suitable for network packet buffering, video frame synchronization, telecom line card interface, and industrial vision data aggregation requiring stable component supply across extended product lifecycles.

Supply support for 72V36110L7-5PFGI 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

IDT (Integrated Device Technology), now part of Renesas Electronics, is a semiconductor company specializing in timing, memory interface, and high-performance interconnect solutions.

The 72V36110L7-5PFGI belongs to the SuperSync II™ FIFO family, designed specifically for high-bandwidth, low-latency data buffering in multi-clock-domain systems such as networking infrastructure, broadcast video, and industrial automation.

FAQ

What is the maximum operating frequency of the 72V36110L7-5PFGI?

The 72V36110L7-5PFGI supports a maximum clock frequency of 133.3 MHz, corresponding to a 7.5 ns clock cycle time. This specification applies to both RCLK and WCLK inputs under industrial temperature conditions (–40°C to +85°C) and is validated for the PBGA package variant. The device maintains full functionality-including FWFT mode, flag generation, and retransmit-at this rate.

Does the 72V36110L7-5PFGI support asynchronous read and write operations?

Yes, the 72V36110L7-5PFGI supports asynchronous read and write operations-but only in the PBGA and CABGA packages. Configuration is controlled by the ASYR (asynchronous read port) and ASYW (asynchronous write port) pins during Master Reset. In asynchronous mode, RD and WR replace RCLK and WCLK as edge-triggered strobes, and the device must operate in Standard timing mode with OE used for output control.

How does the First Word Fall Through (FWFT) mode work in the 72V36110L7-5PFGI?

In FWFT mode, the first word written to an empty 72V36110L7-5PFGI appears on the Q-bus after exactly three rising edges of RCLK, without requiring REN assertion. Subsequent reads still require REN activation. This mode is selected by driving FWFT/SI LOW during Master Reset and is especially valuable in burst-mode receivers where minimal initial latency is critical, such as in packet header processing or video start-of-frame detection.

Can the 72V36110L7-5PFGI be used to expand buffer depth beyond 131,072 words?

Yes, the 72V36110L7-5PFGI supports depth expansion via FWFT chaining: the Q outputs of one device connect directly to the D inputs of the next, with EF/OR and FF/IR flags cascaded. No external logic is required because FWFT mode ensures continuous data flow across the chain. This technique scales total depth linearly while preserving timing predictability and simplifying PCB routing in high-capacity buffering applications.

What is the purpose of the RM pin on the 72V36110L7-5PFGI?

The RM (Retransmit Timing Mode) pin on the 72V36110L7-5PFGI selects between zero-latency and normal-latency retransmit behavior. When RM is LOW during Master Reset, asserting RT on a rising RCLK edge places the first word directly onto the Q-bus on that same edge-enabling immediate reuse without pipeline delay. This is essential for protocols requiring rapid packet retransmission or video frame repetition without added latency.