ISSI Manufacturer Handler Skill

Overview

ISSIHandler manages ISSI (Integrated Silicon Solution Inc.) memory components including SRAM, DRAM, Flash, LED drivers, and specialty memory.

Supported Component Types

• MEMORY
• MEMORY_ISSI
• MEMORY_FLASH
• MEMORY_EEPROM

MPN Patterns

SRAM

Prefix	Description
IS61xx	Async SRAM
IS62xx	Low Power SRAM
IS64xx	Sync SRAM

DRAM

Prefix	Description
IS42xx	SDRAM
IS43xx	DDR SDRAM
IS45xx	DDR2 SDRAM
IS47xx	DDR3 SDRAM

Flash Memory

Prefix	Description
IS25xx	SPI Flash
IS29xx	NOR Flash

LED Drivers

Prefix	Description
IS31FL	LED Matrix Drivers
IS31AP	Audio Modulated LED Drivers
IS31LT	LED Lighting Drivers

Specialty Memory

Prefix	Description
IS65xx	FIFO
IS67xx	Dual-Port RAM

Package Codes

Suffix	Package
T	TSOP
U	SOIC
L	PLCC
V	TSSOP
TL	TSOP-II
TR	TFBGA
B	BGA
BK	FBGA
WB	WBGA
K	VFBGA
M	QFN
Q	QFP

Series Extraction

Returns series code with first 2 characters after prefix (e.g., "IS61WV1288EDBLL" returns "IS61").

Replacement Logic

• Must be same series
• Must have same density
• Faster speed grade can replace slower (lower number = faster)

Test Patterns

When testing ISSIHandler:

1. Use documentation tests for

   matches()

   behavior
2. Use assertions for

   extractPackageCode()

   ,

   extractSeries()

   , null handling
3. Instantiate directly:

   new ISSIHandler()

Known Handler Issues

All issues fixed in PR #88

• Package code extraction regex may not work correctly for all formats

Common Part Numbers

Part Number	Description
IS61WV1288EDBLL	1Mbit Async SRAM, TSOP-44
IS42S16160G-7TL	256Mbit SDRAM, TSOP-II
IS25LP128F-JBLE	128Mbit SPI Flash, BGA
IS31FL3731	LED Matrix Driver