Renesas 7200L12JG8

Overview

IDT7200L12JG8 from Integrated Device Technology (IDT) is a 256 × 9-bit asynchronous first-in/first-out (FIFO) memory IC designed for rate-matching and data buffering between mismatched clock domains or asynchronous systems. It features 12 ns access time, 5 V single-supply operation, and status flags (Empty, Full, Half-Full) for overflow/underflow protection. Used in legacy telecom line cards, industrial serial interface bridges, and military-grade data acquisition subsystems where deterministic latency and retransmit capability are required.

For engineers reviewing the IDT7200L12JG8 datasheet, IDT7200L12JG8 pinout, IDT7200L12JG8 application, or IDT7200L12JG8 equivalent, this page delivers verified specifications, validated pin functions, confirmed operating modes (single-device and width expansion), real-world timing constraints (tA = 12 ns, tRC = 20 ns), and two documented alternative FIFOs with explicit functional trade-offs.

Technical Context

The IDT7200L12JG8 implements a dual-port ring-buffer architecture with independent read/write pointers managed entirely internally-no address bus or external sequencing logic required. Its 9-bit data width supports parity bit insertion for error-checked serial communications.

It operates in Single Device Mode (XI grounded) or Width Expansion Mode (multiple devices sharing W/R/RS control), but not Depth Expansion (XO/HF repurposed as expansion signal). Retransmit (RT) resets the read pointer to zero without affecting the write pointer, enabling repeat transmission of buffered data-critical in packet retransmission protocols.

Key Specifications

Pinout & Package

Package: 32-pin Plastic Leaded Chip Carrier (PLCC), J-lead variant (JG8 suffix denotes green, Pb-free PLCC with SnAgCu finish).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7200L12JG8, the MC100E131FN offers superior speed but demands ECL infrastructure, while the 23K256-I/P trades deterministic latency for flexibility and lower unit cost-neither provides pin-compatible replacement nor identical flag-driven flow control.

Availability

IDT7200L12JG8 is available at Aetrix Electronics and suitable for industrial serial protocol bridges, telecom line interface buffering, and military data acquisition subsystems requiring stable component supply amid end-of-life transitions.

Supply support for IDT7200L12JG8 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, specialized in high-performance timing, memory interface, and interconnect solutions for communications, computing, and industrial markets.

IDT7200L12JG8 belongs to the IDT72xx family of asynchronous CMOS FIFOs engineered for deterministic, low-latency data buffering in legacy and mission-critical systems where asynchronous clock domain crossing must be handled in hardware without CPU intervention.

FAQ

What is the maximum clock frequency supported by IDT7200L12JG8 for read and write operations?

IDT7200L12JG8 does not require a clock signal-it operates asynchronously using edge-triggered W and R strobes. The maximum effective shift frequency is 50 MHz (t_S = 20 ns min), meaning it supports up to 50 million read/write cycles per second when timing constraints (t_RC = 20 ns, t_WC = 20 ns) are met. This is derived from its 12 ns access time and guaranteed cycle timing parameters in the commercial/industrial grade specification.

Does IDT7200L12JG8 support depth expansion to increase memory capacity beyond 256 words?

IDT7200L12JG8 supports width expansion (e.g., 18-bit or 27-bit data paths) but not depth expansion in standard configuration. Depth expansion requires cascading multiple FIFOs using XI/XO pins and external logic for composite EF/FF generation-however, the IDT7200L12JG8 datasheet explicitly states that the Retransmit (RT) and Half-Full (HF) functions are disabled in Depth Expansion Mode, and the PLCC package (JG8) is not listed for depth-expansion-capable variants like IDT7280/7281/7282.

What is the function of the XO/HF pin on IDT7200L12JG8, and how is it used in single-device mode?

In single-device mode (with XI grounded), the XO/HF pin functions as the Half-Full Flag (HF)-an active-LOW open-drain output that asserts when ≥128 of the 256 FIFO locations are occupied. It de-asserts on the rising edge of a Read Enable (R) pulse. This signal enables early buffer saturation warning without polling, allowing systems to initiate throttling or priority servicing before Full Flag (FF) activation.

Can IDT7200L12JG8 operate reliably at 5.5 V supply voltage?

Yes-IDT7200L12JG8 is fully specified for V_CC = 4.5 V to 5.5 V across its industrial temperature range (–40°C to +85°C). DC electrical characteristics including VOH ≥ 2.4 V and VOL ≤ 0.4 V, as well as AC timing parameters (t_A, t_RC), are guaranteed at V_CC = 5.5 V. No derating or reduced performance is required at the upper rail.

Is IDT7200L12JG8 still in production, and what is its lifecycle status?

IDT7200L12JG8 was discontinued by IDT (now Renesas) with Last Time Buy expiring June 15, 2018, as stated in PDN# SP-17-02. However, Aetrix Electronics maintains legacy inventory with traceable, tested units. Full datasheet compliance, original packaging, and RoHS-compliant green (Pb-free) PLCC construction (JG8 suffix) are verified for all available stock.