Renesas 7202LA50JG

Overview

IDT7202LA50JG from Renesas Electronics (formerly IDT) is a 1,024 × 9-bit asynchronous CMOS FIFO memory IC used for rate buffering and data synchronization between mismatched clock domains or bus protocols. It features 125°C max operating temperature, 50 ns access time, active power consumption ≤80 mA at 5 V, and dual-port operation with independent read/write control. It is deployed in military-grade avionics data interfaces requiring deterministic latency and overflow/underflow protection.

For engineers reviewing the IDT7202LA50JG datasheet, IDT7202LA50JG pinout, IDT7202LA50JG application, or IDT7202LA50JG equivalent, key selection criteria include its MIL-STD-883 Class B compliance, 9-bit data width supporting parity, retransmit capability for protocol recovery, and compatibility within the IDT720x family's depth/width expansion architecture.

Technical Context

The IDT7202LA50JG implements a ring-pointer-based FIFO architecture with no external address bus-data sequencing is fully internal. Its dual asynchronous ports allow simultaneous read and write operations without arbitration logic, making it suitable for multiprocessing interconnects and real-time streaming buffers.

It supports three operational modes: Single Device (XI grounded), Depth Expansion (daisy-chained via XO/XI), and Width Expansion (parallel devices). The Half-Full Flag (XO/HF) functions only in single-device mode, while Retransmit (FL/RT) resets the read pointer without affecting the write pointer-critical for re-sending packetized telemetry frames.

Key Specifications

Pinout & Package

Package: 32-pin Plastic Leaded Chip Carrier (PLCC), J32-1 footprint, lead finish SnPb (EOL as of June 2018).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 7202LA35JG and 7202LA25JG, the IDT7202LA50JG trades raw speed for guaranteed operation across extended military temperature ranges and formal MIL-STD-883 Class B screening-making it the only option for certified airborne or tactical platform integration.

Availability

IDT7202LA50JG is available at Aetrix Electronics and suitable for avionics data interfaces, military radio subsystems, and satellite telemetry hubs requiring stable component supply under long-lifecycle programs and obsolescence-sensitive designs.

Supply support for IDT7202LA50JG 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 acquired Integrated Device Technology (IDT) in 2019 and maintains legacy IDT product lines including high-reliability timing and interface ICs.

The IDT7202LA series belongs to IDT's legacy asynchronous FIFO family, designed specifically for deterministic data buffering in safety-critical, mixed-clock-domain systems such as aerospace, defense, and industrial automation.

FAQ

What is the maximum operating temperature rating for IDT7202LA50JG?

IDT7202LA50JG is rated for operation from –55°C to +125°C and is qualified per MIL-STD-883 Class B, making it suitable for deployment in uncooled avionics bays and vehicle-mounted defense electronics where ambient thermal extremes are expected. This specification is verified through temperature cycling, burn-in, and parametric testing per military standards-not derived from commercial-grade derating.

Does IDT7202LA50JG support parity bit handling in its 9-bit data path?

Yes, IDT7202LA50JG provides a native 9-bit data array (D0–D8 and Q0–Q8), allowing users to assign one bit-typically D8-as an odd or even parity bit for error detection in serial communication protocols like ARINC 429 or MIL-STD-1553B. The FIFO treats all nine bits identically; no internal parity generation or checking is performed-the function is fully user-defined.

Can IDT7202LA50JG be used in depth-expansion configurations?

Yes, IDT7202LA50JG supports depth expansion via its XI (Expansion In) and XO/HF (Expansion Out) pins. When chained, the XO of one device connects to the XI of the next, enabling memory arrays larger than 1,024 words. However, in this mode, the Half-Full Flag and Retransmit (FL/RT) functionality are disabled-only EF and FF remain active for composite flag generation.

Is the IDT7202LA50JG pin-compatible with other members of the IDT720x family?

Yes, IDT7202LA50JG is pin- and functionally compatible with IDT7200L and IDT7201LA in the same PLCC-32 package (J32-1), including identical pin assignments for D0–D8, Q0–Q8, W, R, RS, EF, FF, and power. This allows direct substitution in existing layouts when upgrading from 256×9 or 512×9 capacity-provided timing and temperature requirements align.

What is the purpose of the FL/RT pin on IDT7202LA50JG?

The FL/RT pin on IDT7202LA50JG serves dual roles: in depth expansion, it acts as First Load (FL) to designate the head device; in single-device mode, it functions as Retransmit (RT). A LOW pulse on RT resets the internal read pointer to location zero without altering the write pointer-enabling hardware-accelerated retransmission of buffered data, such as retrying a corrupted telemetry packet without CPU involvement.