Renesas 72V01L25JGI

Overview

72V01L25JGI from Renesas Electronics (formerly IDT) is a 3.3 V CMOS asynchronous FIFO memory with 512 × 9-bit depth, 15 ns access time, industrial temperature range (–40°C to +85°C), and 32-pin PLCC package. It supports simultaneous read/write operations, features Empty/Full/Half-Full status flags, and enables retransmit functionality for data recovery in serial communication buffers.

For engineers reviewing the 72V01L25JGI datasheet, 72V01L25JGI pinout, 72V01L25JGI application, or 72V01L25JGI equivalent, this device serves as a low-power, timing-flexible first-in/first-out buffer for rate-matching between mismatched clock domains in industrial control interfaces, legacy bus bridges, and protocol translation subsystems.

Technical Context

The 72V01L25JGI implements a dual-port ring-buffer architecture with independent write and read pointers, eliminating external address management. Its 9-bit data width supports parity or control bit insertion, and its auto-retransmit capability resets the read pointer without affecting the write pointer - critical for error-recovery in UART or HDLC framing.

It operates asynchronously with no clock required on either port; data flow is controlled solely by W (write enable) and R (read enable) strobes. The device uses high-speed CMOS technology and includes expansion logic for unlimited depth or width scalability via daisy-chained or parallel configurations.

Key Specifications

Pinout & Package

72V01L25JGI is housed in a 32-pin Plastic Leaded Chip Carrier (PLCC, J32-1) package with standard lead finish (SnPb), now in EOL process per PDN# SP-17-02. Pin 1 is marked by index notch; device is lead-free compliant upon green-part ordering (G suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 72V01L25JGI, the 72V01L15JGI offers lower latency at higher power cost, while the 72V01L25PGI delivers identical electrical behavior in a modern surface-mount footprint - neither is pin-compatible due to differing package types, but both share functional equivalence and register-level compatibility.

Availability

72V01L25JGI is available at Aetrix Electronics and suitable for industrial serial bridges, legacy bus rate matching, and protocol translation modules requiring stable component supply amid end-of-life transitions.

Supply support for 72V01L25JGI 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.

The 72V01L25JGI belongs to Renesas' legacy IDT FIFO product line, designed specifically for robust, low-latency data buffering in asynchronous multi-protocol systems where deterministic timing and hardware-managed flow control are critical.

FAQ

What is the operating voltage range for the 72V01L25JGI?

The 72V01L25JGI operates across a supply voltage range of 3.0 V to 3.6 V, optimized for 3.3 V nominal systems. This range ensures compatibility with standard LVTTL and LVCMOS logic families while maintaining low-power operation - critical for industrial applications where rail stability and noise immunity are essential. The 72V01L25JGI must not be operated outside this window to guarantee specified timing and flag behavior.

Does the 72V01L25JGI support retransmission of buffered data?

Yes, the 72V01L25JGI supports hardware-assisted retransmission via its FL/RT pin. When pulsed LOW in single-device mode, it resets the internal read pointer to the first location without altering the write pointer - enabling immediate replay of the entire buffer contents. This function is especially valuable in serial communication protocols where packet loss requires deterministic recovery without host CPU intervention. The 72V01L25JGI retains all written data during retransmit, preserving integrity across retries.

What package type is used for the 72V01L25JGI?

The 72V01L25JGI uses a 32-pin Plastic Leaded Chip Carrier (PLCC, order code J) package, specifically the J32-1 variant. It features a square body with J-leads and an index notch for orientation. While SnPb lead finish parts are in EOL (last time buy expired June 15, 2018), green (lead-free) versions remain available under ordering codes with 'G' suffix. The PLCC form factor supports socketed prototyping and through-hole production, distinguishing it from surface-mount alternatives like the TQFP-packaged 72V01L25PGI.

How does the 72V01L25JGI handle full and empty conditions?

The 72V01L25JGI uses dedicated open-drain output pins FF (Full Flag) and EF (Empty Flag) to signal buffer status. FF goes LOW when the write pointer reaches one location before the read pointer - blocking further writes until a read occurs. EF goes LOW when read and write pointers align - disabling reads until new data arrives. Both flags update within guaranteed timing windows (e.g., tRFF ≤ 25 ns), allowing reliable handshake control without software polling. The 72V01L25JGI guarantees these behaviors across its full industrial temperature range.

Can multiple 72V01L25JGI devices be cascaded for increased depth?

Yes, the 72V01L25JGI supports depth expansion via its XI (Expansion In) and XO/HF (Expansion Out) pins. In daisy-chain configuration, XO of one device connects to XI of the next, with FL grounded only on the first unit. This enables arbitrary depth extension (e.g., three 72V01L25JGI units yield 1,536 × 9 capacity). However, the retransmit and half-full functions are disabled in depth mode, and composite EF/FF logic must be implemented externally using OR gates - a design trade-off explicitly documented for the 72V01L25JGI in IDT Application Note 9.