Renesas 72V231L10PFG8

Overview

72V231L10PFG8 from Integrated Device Technology is a 3.3 V CMOS Synchronous FIFO memory with 2,048 × 9-bit depth, 10 ns read/write cycle time, dual-clock operation support (WCLK/RCLK), and programmable Almost-Empty/Almost-Full flags. It serves as a high-speed data buffer in interprocessor communication and local area network interfaces.

For engineers reviewing the 72V231L10PFG8 datasheet, 72V231L10PFG8 pinout, 72V231L10PFG8 application, or 72V231L10PFG8 equivalent, key selection criteria include its 9-bit bidirectional data bus, industrial temperature range (–40°C to +85°C), 5V-tolerant inputs, zero fall-through time architecture, and PLCC-32/TQFP-32 package compatibility.

Technical Context

The 72V231L10PFG8 implements a dual-ported, clocked FIFO architecture with independent write and read control logic. Its RAM array holds exactly 2,048 words of 9-bit data, and status flags (EF, FF, PAE, PAF) are synchronized to respective clocks-EF/PAE to RCLK, FF/PAF to WCLK.

Configuration at power-up is determined by the state of WEN2/LD during reset: LOW enables programmable flag offset loading (defaulting to Empty+7/Full−7), HIGH configures dual-write-enable mode for depth expansion. The device supports both single-clock (RCLK = WCLK) and asynchronous dual-clock operation without metastability risk due to internal pointer synchronization.

Key Specifications

Pinout & Package

72V231L10PFG8 is available in a 32-pin plastic Thin Quad FlatPack (TQFP) package (order code PF) and 32-pin plastic leaded chip carrier (PLCC) (order code J), both RoHS-compliant and green-part qualified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V231L10PF and ICS72V231L10PFG8, the 72V231L10PFG8 offers guaranteed RoHS compliance and ongoing industrial support, whereas the SnPb variant is obsolete and the Renesas-branded part requires cross-checking of lifecycle status and documentation alignment.

Availability

72V231L10PFG8 is available at Aetrix Electronics and suitable for interprocessor communication, network interface buffering, graphics data streaming, and industrial PLC I/O expansion requiring stable component supply across extended product lifecycles.

Supply support for 72V231L10PFG8 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, Inc. (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions before its acquisition by Renesas Electronics in 2019.

The IDT72V2xx family was designed specifically for high-speed, low-latency data buffering in mixed-clock-domain systems, targeting industrial, telecom, and computing applications where deterministic timing and robust flag signaling are critical.

FAQ

What is the memory organization of the 72V231L10PFG8?

The 72V231L10PFG8 features a 2,048 × 9-bit synchronous FIFO memory array, providing 2,048 words of storage with a 9-bit parallel data path. This configuration supports applications requiring moderate-depth buffering with high bandwidth, such as protocol translation bridges and real-time data acquisition subsystems. The 72V231L10PFG8 does not support width or depth expansion in its default configuration unless externally wired with companion devices.

Does the 72V231L10PFG8 support both single-clock and dual-clock operation?

Yes, the 72V231L10PFG8 supports both modes: RCLK and WCLK may be tied together for single-clock operation, or run independently for true asynchronous dual-clock buffering. In dual-clock mode, EF and PAE are synchronized to RCLK, while FF and PAF are synchronized to WCLK - ensuring reliable flag assertion without metastability. This behavior is intrinsic to the 72V231L10PFG8 architecture and requires no configuration.

How are the programmable Almost-Empty and Almost-Full flags configured on the 72V231L10PFG8?

The 72V231L10PFG8 uses the WEN2/LD pin during reset to enter programmable flag mode. Once configured, four 8-bit offset registers (Empty LSB/MSB, Full LSB/MSB) are loaded sequentially via WCLK edges. Default values are 007H for both offsets, yielding PAE = Empty+7 and PAF = Full−7. These registers are readable and writable without halting normal FIFO operation, and their contents directly determine 72V231L10PFG8 flag trigger points.

Is the 72V231L10PFG8 pin-compatible with other members of the IDT72V2xx family?

Yes - all IDT72V2xx devices (e.g., 72V201, 72V211, 72V221, 72V231, 72V241, 72V251) share identical pinouts, package footprints (PLCC-32/TQFP-32), and signal definitions. The 72V231L10PFG8 differs only in memory depth (2,048 × 9) and speed grade (10 ns), making it a direct PCB-replaceable upgrade/downgrade within the family when board layout accommodates the same package.

What is the meaning of the 'G8' suffix in 72V231L10PFG8?

The 'G8' suffix in 72V231L10PFG8 denotes lead-free (Pb-free) packaging and green-material compliance per JEDEC J-STD-609A Class 8 standards. It confirms the device uses matte tin termination on the TQFP-32 leads and complies with RoHS Directive 2011/65/EU. This designation is critical for export-controlled and environmentally regulated applications where hazardous substance restrictions apply to the 72V231L10PFG8.