Renesas 7201LA15JGI8

Overview

IDT7201LA15JGI8 from Renesas Electronics (formerly IDT) is a 512 × 9-bit asynchronous first-in/first-out (FIFO) memory IC designed for rate-matching and data buffering between asynchronous clock domains. It features 15 ns access time, ultra-low active power (440 mW max), and status flags (Empty, Full, Half-Full) for overflow/underflow protection - deployed in industrial communications controllers requiring deterministic latency and parity-aware data flow.

For engineers reviewing the IDT7201LA15JGI8 datasheet, IDT7201LA15JGI8 pinout, IDT7201LA15JGI8 application, or IDT7201LA15JGI8 equivalent, key selection criteria include its 512-word depth with 9-bit width (supporting parity), military-grade temperature range (–55°C to +125°C), PLCC-32 package, and retransmit capability for protocol recovery in serial data links.

Technical Context

This CMOS FIFO uses dual independent ring pointers for fully asynchronous read/write operations without external address management. Its internal logic supports single-device mode (XI grounded), depth expansion (daisy-chained via XO/XI), and width expansion - all while maintaining flag integrity across modes except depth expansion where HF and RT are disabled.

The device implements auto-retransmit via FL/RT pin pulse, resetting the read pointer without affecting write pointer position - critical for UART/HDLC frame retransmission. It operates at 5 V ±10% with TTL-compatible inputs and three-state outputs, and complies with MIL-STD-883 Class B for military applications.

Key Specifications

Pinout & Package

Package: 32-lead plastic leaded chip carrier (PLCC), J-standoff, 1.27 mm pitch, JEDEC MS-026AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7201LA15JGI8, the 7201LA20JGI8 trades 5 ns speed for broader timing margin and potentially lower cost, while the 7201LA15PGI8 retains identical electrical performance but shifts to through-hole mounting - neither offers pin-to-pin replacement without PCB layout revision due to differing packages.

Availability

IDT7201LA15JGI8 is available at Aetrix Electronics and suitable for industrial serial gateways, avionics data buffers, and telecom line cards requiring stable component supply amid end-of-life transitions.

Supply support for IDT7201LA15JGI8 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, and infrastructure markets.

IDT7201LA15JGI8 belongs to the legacy IDT7200/7201/7202 family of high-speed asynchronous FIFOs, engineered for deterministic data buffering in multiprocessor, communications, and military systems where clock domain isolation is critical.

FAQ

What is the memory organization of the IDT7201LA15JGI8?

The IDT7201LA15JGI8 implements a 512 × 9-bit first-in/first-out memory array. This configuration provides 512 words of storage, each word being 9 bits wide - supporting 8-bit data plus 1 parity bit for error detection in serial communication protocols. The architecture uses dual ring pointers for fully asynchronous read and write operations without external address management.

Does the IDT7201LA15JGI8 support retransmission functionality?

Yes, the IDT7201LA15JGI8 supports hardware-assisted retransmission via its FL/RT pin. When pulsed low, this input resets the internal read pointer to the first memory location while leaving the write pointer unchanged - enabling rapid frame retransmission in protocols like HDLC without CPU intervention. This function is only available in single-device or width-expansion modes, not in depth-expansion configurations.

What package type is used for the IDT7201LA15JGI8?

IDT7201LA15JGI8 is packaged in a 32-lead plastic leaded chip carrier (PLCC), identified by the "J" suffix in the part number. This surface-mount package has a 1.27 mm lead pitch and conforms to JEDEC standard MS-026AC. It is distinct from the plastic DIP ("P") and SOIC ("SO") variants offered in the same speed grade.

Is the IDT7201LA15JGI8 compliant with military specifications?

Yes, the IDT7201LA15JGI8 is manufactured and tested to comply with MIL-STD-883, Class B, and is listed under Standard Military Drawing #5962-89666. It operates across the full military temperature range of –55°C to +125°C and meets associated environmental stress screening requirements - making it suitable for defense and aerospace applications.

Can multiple IDT7201LA15JGI8 devices be cascaded for increased depth?

Yes, the IDT7201LA15JGI8 supports depth expansion via its XI (Expansion In) and XO/HF (Expansion Out) pins. Devices are daisy-chained with XO of one device connected to XI of the next. In this mode, the first device must have FL grounded, and composite EF/FF flags require external OR logic. Note that Half-Full Flag and Retransmit functions are disabled during depth expansion.