Renesas 8403609JA

Overview

8403609JA from Renesas Electronics is a 16K-bit (2K × 8) CMOS static RAM with TTL-compatible I/O, 25ns max access time (commercial grade), 5V supply, and industrial temperature range (–40°C to +85°C). It features automatic standby mode on chip select high, low-power LA variant capability (2V data retention), and is packaged in 24-pin SOIC (PSG24). Used in legacy industrial controllers requiring non-refreshed memory with battery backup support.

For engineers reviewing the 8403609JA datasheet, 8403609JA pinout, 8403609JA application, or 8403609JA equivalent, this page delivers verified timing specs, package mapping, functional truth table behavior, real-world power consumption values across operating modes, and confirmed drop-in alternatives for industrial embedded systems design and obsolescence mitigation.

Technical Context

The 8403609JA implements fully static asynchronous operation-no clocks or refresh required-and uses high-reliability CMOS process to eliminate alpha-particle soft errors. Its control logic supports three distinct operational modes: standby (CS HIGH), read (CS & OE LOW, WE HIGH), and write (CS & WE LOW).

It integrates a 128 × 128 memory array with address decoding, I/O control, and input data circuitry. The device supports TTL-level inputs (VIH = 2.2V min, VIL = 0.8V max) and drives standard TTL loads (VOH ≥ 2.4V at –4mA, VOL ≤ 0.4V at 8mA) under 5V ±10% supply conditions.

Key Specifications

Pinout & Package

8403609JA is supplied in a 24-pin gull-wing SOIC package (PSG24, 300-mil width), optimized for surface-mount assembly and high board density.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar static RAM applications.

Compared with IS61LV256AL-10TLI and AS6C4008-25ZIN, the 8403609JA uniquely balances 5V TTL compatibility, industrial temperature operation, battery-backed data retention, and exact 24-pin SOIC footprint - making it the only direct replacement for legacy 6116LA-based designs requiring zero hardware modification.

Availability

8403609JA is available at Aetrix Electronics and suitable for industrial automation, legacy equipment repair, and avionics test instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for 8403609JA 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 memory solutions for automotive, industrial, and infrastructure markets.

The 8403609JA belongs to Renesas' legacy CMOS SRAM product line, engineered for high reliability, low power, and drop-in compatibility with classic 6116-family designs in mission-critical industrial and defense systems.

FAQ

What is the full part number and manufacturer of 8403609JA?

The 8403609JA is a Renesas Electronics part, originally developed by IDT (Integrated Device Technology) and rebranded under Renesas after acquisition. It is a 2K × 8-bit CMOS static RAM in 24-pin SOIC packaging, specified for industrial temperature operation. The full orderable designation corresponds to the 6116LA25SOGI variant per Renesas' ordering matrix, confirming its low-power (LA) and 25ns speed grade.

Does 8403609JA support battery backup operation?

Yes, the 8403609JA implements battery backup functionality inherent to the LA variant of the 6116 family. When VCC drops to 2.0V, it maintains data integrity with typical retention current of 0.5–2.0µA across temperature ranges. This feature is explicitly documented in the "Data Retention Characteristics" section of the Renesas datasheet for 6116LA devices, and 8403609JA maps directly to that specification.

What is the pinout configuration of 8403609JA and is it compatible with standard 6116 footprints?

The 8403609JA uses a standard 24-pin SOIC (PSG24) package with identical pinout to industry-standard 6116 SRAMs: pins 1–11 and 13–23 assign to A0–A10, I/O0–I/O7, CS, WE, OE, VCC, and GND as defined in the functional block diagram and pin description tables. Its pin mapping matches both 24-pin PDIP and SOIC variants of 6116SA/LA, enabling direct PCB footprint reuse.

What are the key AC timing parameters for 8403609JA in read and write cycles?

For read cycles, 8403609JA guarantees tAA ≤ 25ns, tOE ≤ 25ns, and tOH ≥ 5ns. For write cycles, tWC ≤ 25ns, tDW ≤ 15ns, and tDH ≥ 0ns (data hold after WE/CS high). All values are specified at VCC = 5.0V ±10% and TA = –40°C to +85°C, and align with the 6116LA25 speed grade timing tables in the Renesas datasheet Rev. Jul.17.20.

Is 8403609JA RoHS-compliant and what is its packaging format?

Yes, 8403609JA is a green (RoHS-compliant) device per Renesas' updated ordering information (Rev. Jul.17.20), with lead-free terminations and halogen-free molding compound. It is supplied in tape-and-reel format (PSG24 package code) - specifically, 8403609JA corresponds to orderable part 6116LA25SOGI8 - and meets JEDEC standard SOIC-24 mechanical dimensions (300-mil width, 1.27mm pitch).