Renesas 7201LA15SOGI8

Overview

IDT7201LA15SOGI8 from Renesas Electronics (formerly IDT) is a 512 × 9-bit asynchronous CMOS FIFO memory IC used for rate buffering and data synchronization between mismatched clock domains or bus protocols. It features 15 ns access time, ultra-high-speed operation, dual-port read/write capability, and status flags (Empty, Full, Half-Full). It is deployed in industrial communications interfaces requiring deterministic latency and overflow/underflow protection.

For engineers reviewing the IDT7201LA15SOGI8 datasheet, IDT7201LA15SOGI8 pinout, IDT7201LA15SOGI8 application, or IDT7201LA15SOGI8 equivalent, key selection criteria include its 512-word depth, 9-bit data width with parity support, 15 ns access timing, industrial temperature range (–40°C to +85°C), and TSSOP-28 package compatibility with legacy PCB layouts.

Technical Context

The IDT7201LA15SOGI8 implements a ring-pointer-based FIFO architecture with no external address bus required-data flows sequentially via Write (W) and Read (R) control edges. Its internal logic maintains independent read and write pointers, enabling true asynchronous, simultaneous read/write operations without arbitration.

It supports three operating modes: Single Device (XI grounded), Depth Expansion (daisy-chained via XI/XO), and Width Expansion (parallel devices for wider data paths). The FL/RT pin serves dual roles-First Load in expansion mode and Retransmit in single-device mode-resetting the read pointer to origin while preserving write pointer state.

Key Specifications

Pinout & Package

Package: 28-pin TSSOP (SO28-3), surface-mount, lead-free (Green) variant per ordering suffix 'G'; 4.4 mm width, 9.7 mm length, 1.2 mm height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NB3N502DR2G, IDT7201LA15SOGI8 provides 5 V compatibility and double the memory depth but lacks LVDS signaling. Against IDT7201LA20SOGI8, it delivers tighter timing and lower active power-critical for latency-sensitive industrial gateways.

Availability

IDT7201LA15SOGI8 is available at Aetrix Electronics and suitable for industrial serial gateways, avionics data buffers, telecom line card adapters, and automated test equipment requiring stable component supply amid end-of-life transitions.

Supply support for IDT7201LA15SOGI8 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 delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, infrastructure, and IoT applications.

IDT7201LA15SOGI8 belongs to the legacy IDT7200/7201/7202 family of high-speed asynchronous FIFOs, designed specifically for deterministic data buffering in rate-adaptation, multiprocessing, and mission-critical communication systems.

FAQ

What is the maximum operating frequency supported by IDT7201LA15SOGI8?

IDT7201LA15SOGI8 does not operate on a fixed clock but supports asynchronous read/write cycles. Its 15 ns access time enables effective throughput up to 66.7 MHz in flow-through mode. Maximum shift frequency is 40 MHz (per AC specs), constrained by tRC (25 ns read cycle time) and tWC (25 ns write cycle time). System-level timing must respect all setup/hold requirements including tDS (11 ns data setup) and tDH (0 ns hold).

Does IDT7201LA15SOGI8 support 3.3 V operation?

No. IDT7201LA15SOGI8 is a 5 V-only device with absolute maximum VCC of 5.5 V and minimum operating VCC of 4.5 V. Its input thresholds (VIH = 2.0 V min for commercial/industrial) and output drive levels (VOH ≥ 2.4 V, VOL ≤ 0.4 V) are specified for 5 V TTL/CMOS compatibility. Using 3.3 V supply will result in undefined logic states and potential functional failure.

How is the Half-Full Flag (HF) used in IDT7201LA15SOGI8?

In IDT7201LA15SOGI8 single-device mode (XI = GND), the XO/HF pin functions as the Half-Full Flag. It asserts LOW after the 256th write (half of 512 depth) and remains LOW until the difference between write and read pointers falls to ≤256. It deasserts on the rising edge of R. This flag enables proactive DMA triggering or interrupt generation before full saturation-critical for real-time streaming applications.

Can IDT7201LA15SOGI8 be used in depth expansion configurations?

Yes. IDT7201LA15SOGI8 supports depth expansion via XI/XO chaining: XI of each subsequent device connects to XO of the prior one, with FL/RT grounded only on the first device. However, HF and RT functions are disabled in this mode, and composite EF/FF must be OR'd externally. All devices in the chain must share identical speed grades (e.g., all 15 ns) to maintain timing integrity.

Is IDT7201LA15SOGI8 still in production?

IDT7201LA15SOGI8 entered End-of-Life (EOL) per Renesas PDN# SP-17-02, with Last Time Buy expiring June 15, 2018. Aetrix Electronics maintains limited legacy inventory with full traceability and offers lifecycle coordination support-including cross-reference guidance, obsolescence forecasting, and drop-in alternatives-for ongoing industrial and defense programs relying on IDT7201LA15SOGI8.