Renesas 72V215L10TFG8

Overview

72V215L10TFG8 from Integrated Device Technology (IDT) is a 3.3 V CMOS synchronous FIFO memory with 512 × 18-bit depth and 10 ns read/write cycle time, supporting dual-clock or single-clock operation in IDT Standard or First Word Fall-Through (FWFT) timing modes. It features programmable Almost-Empty/Almost-Full flags, Half-Full flag, and output enable for high-impedance control - deployed in LAN controllers, interprocessor communication buffers, and optical disk controller data pipelines.

For engineers reviewing the 72V215L10TFG8 datasheet, 72V215L10TFG8 pinout, 72V215L10TFG8 application, or 72V215L10TFG8 equivalent, key selection criteria include its 512-word × 18-bit organization, 10 ns cycle time, industrial temperature range (–40°C to +85°C), TQFP-64 package, and configurable flag timing (synchronous/asynchronous) via FL/RXI/WXI pins at reset.

Technical Context

The 72V215L10TFG8 implements a clocked, dual-port RAM array with independent read and write pointer logic, register-buffered flag generation, and expansion logic for daisy-chain depth scaling. Its functional block includes input/output registers, offset registers for PAE/PAF programming, and configurable flag logic driven by FL/RXI/WXI during reset.

It supports two distinct timing modes: IDT Standard mode (EF/FF flags, read-triggered output) and FWFT mode (OR/IR flags, immediate first-word output after three RCLK edges). Flag behavior, buffer depth thresholds (e.g., HF assertion at 257 words), and offset defaults (PAE=63 from empty, PAF=63 from full) are fixed per device size and mode.

Key Specifications

Pinout & Package

72V215L10TFG8 is housed in a 64-lead thin quad flatpack (TQFP) with exposed pad (STQFP/TF package code), measuring 10 mm × 10 mm, 1.4 mm height, and 0.5 mm lead pitch. Pin 1 is marked by a corner notch or dot; pin numbering follows standard counter-clockwise top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 72V215L10TFG8, the 72V215L15TFG8 trades speed for lower cost and power, while the 72V225L10TFG8 doubles depth without sacrificing speed or package - both retain identical flag logic, configuration methodology, and industrial temperature support.

Availability

72V215L10TFG8 is available at Aetrix Electronics and suitable for LAN controllers, interprocessor communication links, and optical disk controller buffering requiring stable component supply, industrial temperature resilience, and deterministic 10 ns timing.

Supply support for 72V215L10TFG8 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.

The IDT72V2xx family was designed as high-speed, low-power synchronous FIFOs for data buffering in communications infrastructure, storage controllers, and real-time embedded systems - emphasizing configurability, industrial reliability, and seamless clock-domain bridging.

FAQ

What is the memory organization of the 72V215L10TFG8?

The 72V215L10TFG8 features a 512 × 18-bit synchronous FIFO memory array, providing 9,216 bits of buffer storage. This organization supports 18-bit parallel data paths and is optimized for applications requiring moderate-depth, high-speed buffering - such as network packet handling or inter-processor messaging. The 72V215L10TFG8 does not support width expansion without external logic; depth expansion is achieved via daisy-chained WXO/RXO connections.

Does the 72V215L10TFG8 support both single-clock and dual-clock operation?

Yes, the 72V215L10TFG8 supports both configurations. When WCLK and RCLK are tied together, it operates in single-clock mode with synchronized read/write timing. When driven independently, it functions in dual-clock mode - enabling asynchronous data transfer between clock domains. The 72V215L10TFG8's internal pointer logic and flag generation remain fully functional in either mode, with timing parameters (e.g., tSKEW1, tSKEW2) specified for dual-clock use cases.

How is the First Word Fall-Through (FWFT) mode enabled on the 72V215L10TFG8?

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/double flag buffering and asynchronous PAE/PAF. Once configured, the 72V215L10TFG8 outputs the first written word after three RCLK edges without requiring REN activation, and status flags become OR (Output Ready) and IR (Input Ready) instead of EF/FF.

What are the default programmable flag offsets for the 72V215L10TFG8?

The 72V215L10TFG8 defaults to PAE = 63 words from empty and PAF = 63 words from full. These values are loaded into internal offset registers at power-on reset and determine when the Almost-Empty and Almost-Full flags assert. They can be reprogrammed using the LD pin and D0–D11 inputs - with the first WCLK edge loading the empty offset and the second loading the full offset - allowing system-specific tuning of flow-control thresholds.

Is the 72V215L10TFG8 compatible with 5 V logic interfaces?

Yes, the 72V215L10TFG8 has 5 V-tolerant inputs (VIH up to 5.5 V), allowing direct connection to 5 V CMOS/TTL logic without level shifters. Its outputs are 3.3 V LVTTL-compatible (VOH ≥ 2.4 V, VOL ≤ 0.4 V at specified loads), and the OE pin enables clean bus sharing. This mixed-voltage capability simplifies integration with legacy peripherals while maintaining low 3.3 V core power consumption - a key design advantage confirmed in the DC Electrical Characteristics table.