Renesas 7204L15SOGI8

Overview

IDT7204L15SOGI8 from Integrated Device Technology is a 4,096 x 9-bit asynchronous FIFO memory IC used for rate buffering and data synchronization between mismatched clock domains or bus protocols. It features 15 ns access time, 5 V supply operation, industrial temperature range (–40°C to +85°C), and status flags (Empty, Full, Half-Full) for real-time buffer management in embedded communication interfaces.

For engineers reviewing the IDT7204L15SOGI8 datasheet, IDT7204L15SOGI8 pinout, IDT7204L15SOGI8 application, or IDT7204L15SOGI8 equivalent, key selection criteria include its 4K-depth/9-bit-width configuration, dual-port asynchronous read/write capability, retransmit function, and SOIC-28 package compatibility with legacy industrial control and test equipment designs.

Technical Context

The IDT7204L15SOGI8 implements a fully asynchronous dual-port architecture with independent write and read pointers, enabling simultaneous data loading and unloading without clock domain alignment. Its internal RAM array supports 4,096 words × 9 bits, with the ninth bit usable for parity or control signaling.

Status logic generates EF (Empty Flag), FF (Full Flag), and XO/HF (Expansion Out / Half-Full Flag) outputs to manage flow control, while FL/RT (First Load / Retransmit) enables pointer reset for data replay-critical in packet retransmission and diagnostic trace buffering applications.

Key Specifications

Pinout & Package

Package: SOIC-28 (SO28-3), surface-mount, 300 mil width, RoHS-compliant green variant (per ordering note).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC7204L15J and IDT7204L15SOI, the IDT7204L15SOGI8 offers verified compatibility with existing industrial control PCBs using SOIC-28 footprints and guarantees –40°C to +85°C operation without derating, making it optimal for cost-sensitive retrofit and volume production scenarios.

Availability

IDT7204L15SOGI8 is available at Aetrix Electronics and suitable for industrial PLC communication interfaces, automated test equipment data capture, medical imaging pipelines, and legacy avionics data concentrators requiring stable component supply and long-term obsolescence mitigation.

Supply support for IDT7204L15SOGI8 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions.

The IDT7200 family was designed specifically for asynchronous data buffering in mixed-clock-domain systems, targeting industrial automation, test instrumentation, and aerospace applications where deterministic latency and hardware flow control are critical.

FAQ

What is the memory organization of the IDT7204L15SOGI8?

The IDT7204L15SOGI8 is organized as 4,096 words × 9 bits, providing 4K-depth buffering with an extra bit per word usable for parity checking or control signaling. This configuration matches the IDT7204 designation in the 720x FIFO family and is distinct from the 2K (IDT7203), 8K (IDT7205), and larger variants. The 9-bit width supports byte-aligned data plus one auxiliary bit without external glue logic.

Does the IDT7204L15SOGI8 support simultaneous read and write operations?

Yes, the IDT7204L15SOGI8 supports fully asynchronous and simultaneous read and write operations via independent R and W control pins. Its dual-port architecture uses separate internal read and write pointers, allowing data to be written and read concurrently without contention or arbitration logic. This capability is fundamental to its use in rate-matching and clock-domain isolation applications.

What is the purpose of the FL/RT pin on the IDT7204L15SOGI8?

The FL/RT (First Load / Retransmit) pin on the IDT7204L15SOGI8 serves as a retransmit control: pulsing it LOW resets the internal read pointer to the first memory location while leaving the write pointer unchanged. This enables deterministic replay of buffered data - valuable in protocol recovery, diagnostic trace capture, and firmware update rollback. It is disabled in depth expansion mode.

Is the IDT7204L15SOGI8 compatible with 3.3 V logic systems?

No, the IDT7204L15SOGI8 is a 5 V-only device with VIH minimum of 2.0 V (commercial/industrial) and VIL maximum of 0.8 V. It is not 3.3 V tolerant and requires level translation when interfacing with 3.3 V microcontrollers or FPGAs. Its DC characteristics and timing parameters are specified strictly for VCC = 4.5 V to 5.5 V operation.

How does the Half-Full Flag (HF) function on the IDT7204L15SOGI8?

On the IDT7204L15SOGI8, the Half-Full Flag (HF) is multiplexed on the XO/HF pin and activates in single-device mode when the FIFO reaches ≥50% capacity. HF goes LOW at the falling edge of the next write after half-full and remains LOW until the difference between write and read pointers drops to ≤2,048 words, then resets on the rising edge of a subsequent read. It is not available in depth expansion mode.