Renesas 7202LA12SOG8

Overview

7202LA12SOG8 from IDT (now Renesas Electronics) is a 1,024 × 9-bit CMOS asynchronous FIFO memory IC used for rate buffering and data synchronization between mismatched clock domains or bus protocols. It features 12 ns access time, ultra-high-speed operation, dual-port asynchronous read/write capability, and status flags (Empty, Full, Half-Full). It is deployed in industrial communications systems requiring reliable first-in/first-out data flow with parity support.

For engineers reviewing the 7202LA12SOG8 datasheet, 7202LA12SOG8 pinout, 7202LA12SOG8 application, or 7202LA12SOG8 equivalent, key selection criteria include its 1,024-word depth, 9-bit data width with optional parity bit, 12 ns access timing, industrial temperature range (–40°C to +85°C), and compatibility with depth/width expansion architectures.

Technical Context

The 7202LA12SOG8 implements ring-pointer-based internal addressing-eliminating external address buses-and supports simultaneous independent read/write operations without arbitration logic. Its 9-bit data path accommodates 8 data bits plus 1 parity bit, enabling error detection in serial communication links.

It operates in three primary modes: Single Device (XI grounded), Depth Expansion (daisy-chained via XI/XO), and Width Expansion (parallel devices for wider data paths). Retransmit (RT) and Reset (RS) controls allow pointer reinitialization, while EF, FF, and XO/HF flags provide real-time buffer status for system-level flow control.

Key Specifications

Pinout & Package

7202LA12SOG8 is packaged in a 28-pin SOIC (SO28-3) with gull-wing leads, RoHS-compliant green finish (G suffix), and tape-and-reel delivery (8 suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 7202LA12SOG8, the 15 ns and 20 ns variants trade access speed for relaxed timing margins and lower power draw-enabling robust operation in electrically noisy or thermally demanding industrial enclosures without redesigning PCB layout or control firmware.

Availability

7202LA12SOG8 is available at Aetrix Electronics and suitable for industrial serial gateways, legacy bus interfacing, telecom protocol stack buffers, and military avionics data recorders requiring stable component supply amid end-of-life transitions.

Supply support for 7202LA12SOG8 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

IDT (Integrated Device Technology), now part of Renesas Electronics, is a semiconductor company specializing in timing, memory interface, and high-performance interconnect solutions.

The IDT7200L/7201LA/7202LA family was designed for deterministic, low-latency data buffering in multiprocessing, rate-adaptation, and protocol translation systems-particularly where asynchronous clock domains require hardware-managed flow control.

FAQ

What is the memory depth and data width of the 7202LA12SOG8?

The 7202LA12SOG8 provides a 1,024 × 9-bit first-in/first-out memory structure. This means it stores up to 1,024 words, each 9 bits wide-supporting 8 data bits plus 1 parity bit for error checking. Its fixed depth and width are defined at silicon level and cannot be altered via configuration pins or registers. The 7202LA12SOG8 is part of IDT's 7200L series, where "7202" explicitly denotes the 1,024-word variant.

Does the 7202LA12SOG8 support simultaneous read and write operations?

Yes, the 7202LA12SOG8 supports fully asynchronous and simultaneous read and write operations. Its dual-port architecture uses independent internal pointers-no arbitration logic is required. Reads and writes occur on falling edges of R and W inputs respectively, and the device guarantees data integrity even when both operations occur concurrently, provided EF and FF flags are monitored to prevent underflow or overflow. This behavior is intrinsic to the 7202LA12SOG8 design and verified across commercial, industrial, and military temperature ranges.

What does the "SOG8" suffix in 7202LA12SOG8 indicate?

The "SOG8" suffix in 7202LA12SOG8 specifies packaging and environmental compliance: "S" = SOIC package (SO28-3), "O" = commercial/industrial temperature range (–40°C to +85°C), "G" = green (lead-free, RoHS-compliant) finish, and "8" = tape-and-reel packaging. This matches IDT's official ordering convention documented in the datasheet's Ordering Information section (DSC-2679/15, Rev. Nov 2017). The 7202LA12SOG8 is not a military-grade part-the "B" suffix would denote that.

Can the 7202LA12SOG8 be used in depth-expansion configurations?

Yes, the 7202LA12SOG8 supports depth expansion via its XI (Expansion In) and XO/HF (Expansion Out) pins. When chained in daisy configuration-XO of one device connected to XI of the next-the 7202LA12SOG8 forms larger FIFOs (e.g., 2,048 × 9, 3,072 × 9). However, in depth-expansion mode, the Retransmit (RT) function and Half-Full Flag (HF) are disabled per the datasheet. Composite EF and FF signals must be generated externally using OR logic across all devices in the chain.

Is the 7202LA12SOG8 still in production or subject to obsolescence?

The 7202LA12SOG8 is marked End-of-Life (EOL) per IDT's Product Discontinuation Notice PDN# SP-17-02: lead-finish (SnPb) parts entered EOL in November 2017, with last-time-buy expiring June 15, 2018. The "G" (green/RoHS) variant like 7202LA12SOG8 was offered as a replacement, but Renesas' current portfolio does not list active production status for this specific speed/package combination. Aetrix Electronics maintains limited legacy inventory with full traceability for ongoing industrial and defense program support.