jmicron

name	jmicron
description	JMicron Technology MPN encoding patterns, series identification, and handler guidance. Use when working with storage controller ICs or JMicronHandler.

JMicron Technology Manufacturer Skill

MPN Structure

JMicron MPNs follow these general structures:

JMS[SERIES][VARIANT][PACKAGE]    (USB-SATA bridges)
JMB[SERIES][VARIANT][PACKAGE]    (PCIe/SATA controllers)
JMF[SERIES][VARIANT][PACKAGE]    (Flash controllers)
JM20[SERIES][VARIANT][PACKAGE]   (Legacy IDE/SATA)
 |     |       |        |
 |     |       |        └── Package code (QFN, LQFP, BGA, etc.)
 |     |       └── Variant letter (optional)
 |     └── 3-digit series number
 └── JMS/JMB/JMF/JM20 prefix

Example Decoding

JMS583-QFN
│  │  │
│  │  └── QFN package
│  └── 583 = USB 3.1 Gen2 to SATA/NVMe bridge
└── JMS = JMicron USB-SATA prefix

JMB585-LQFP
│  │  │
│  │  └── LQFP package
│  └── 585 = 5-port PCIe Gen3 SATA controller
└── JMB = JMicron board controller prefix

---

Product Series

JMS5xx Series - USB to SATA Bridges

Series	Interface	Description
JMS539	USB 3.0	USB 3.0 to SATA III bridge
JMS567	USB 3.0	USB 3.0 to SATA III with UASP
JMS578	USB 3.1 Gen1	USB 3.1 Gen1 to SATA III
JMS583	USB 3.1 Gen2	USB 3.1 Gen2 to SATA III/NVMe

JMB5xx Series - PCIe SATA Controllers

Series	Interface	Description
JMB575	PCIe	5-port SATA 6Gb/s controller
JMB585	PCIe Gen3	5-port SATA 6Gb/s PCIe Gen3 controller

JMB3xx Series - SATA/PATA Controllers

Series	Interface	Description
JMB363	PCIe	SATA/PATA combo controller
JMB368	PCIe	PATA controller

JMF Series - Flash Controllers

Series	Type	Description
JMF60x	Flash	SSD controller (early gen)
JMF61x	Flash	SSD controller
JMF66x	Flash	SSD controller (newer gen)

JM20xxx Series - Legacy Controllers

Series	Interface	Description
JM20330	IDE/SATA	SATA to PATA bridge
JM20337	IDE/SATA	IDE to SATA bridge

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Package Codes

Code	Package	Notes
QFN	QFN	Quad Flat No-Lead
Q	QFN	Short form
LQFP	LQFP	Low-profile Quad Flat Package
L	LQFP	Short form
BGA	BGA	Ball Grid Array
B	BGA	Short form
T	TQFP	Thin Quad Flat Package

---

USB Generation by Series

Series	USB Generation	Notes
JMS539	USB 3.0	5Gbps
JMS567	USB 3.0	5Gbps, UASP support
JMS578	USB 3.1 Gen1	5Gbps
JMS583	USB 3.1 Gen2	10Gbps

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Feature Support Matrix

Series	UASP	NVMe	Port Count
JMS539	No	No	1
JMS567	Yes	No	1
JMS578	Yes	No	1
JMS583	Yes	Yes	1
JMB575	N/A	No	5
JMB585	N/A	No	5
JMB363	N/A	No	2
JMB368	N/A	No	2

---

Handler Implementation Notes

Pattern Matching

// JMS5xx series - USB to SATA bridge controllers
"^JMS5[0-9]{2}[A-Z]*.*"

// JMB5xx series - PCIe SATA/NVMe controllers
"^JMB5[0-9]{2}[A-Z]*.*"

// JMB3xx series - SATA port multiplier/host controllers
"^JMB3[0-9]{2}[A-Z]*.*"

// JMF series - Flash memory controllers
"^JMF[0-9]+[A-Z]*.*"

// JMB4xx series - USB bridge controllers (legacy)
"^JMB4[0-9]{2}[A-Z]*.*"

// JM20xxx series - IDE/SATA controllers (legacy)
"^JM20[0-9]{3}[A-Z]*.*"

Series Extraction

// JMS/JMB series: prefix + 3 digits = 6 characters
// JMS583 -> JMS583
// JMB585 -> JMB585

if (upperMpn.matches("^JMS5[0-9]{2}.*")) {
    return upperMpn.substring(0, 6);
}

// JMF series: variable length digits
// JMF612 -> JMF612
// JMF667 -> JMF667

// JM20xxx series: 7 characters
// JM20330 -> JM20330

Package Code Extraction

// Check hyphenated package codes first
// JMS583-QFN -> QFN

// Then check trailing letters after digits
// JMS583Q -> QFN (Q maps to QFN)

---

Replacement Compatibility

USB-SATA Bridge Upgrade Path

Higher generation can replace lower:

• JMS567 can replace JMS539 (adds UASP)
• JMS578 can replace JMS567 (USB 3.1 Gen1)
• JMS583 can replace JMS578 (USB 3.1 Gen2, adds NVMe)

Level hierarchy:

JMS539 (Level 1) < JMS567 (Level 2) < JMS578 (Level 3) < JMS583 (Level 4)

PCIe SATA Controllers

• JMB585 can replace JMB575 (newer, PCIe Gen3)

Non-Interchangeable

• JMS5xx (USB bridges) NOT compatible with JMB5xx (PCIe controllers)
• Different interface types cannot be swapped

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Common Applications

Series	Application
JMS539/567/578/583	External USB hard drive enclosures
JMB575/585	Multi-drive SATA expansion cards
JMB363	Motherboard SATA+PATA combo
JMF series	SSD/Flash drive controllers

---

Related Files

• Handler: manufacturers/JMicronHandler.java
• Component types: ComponentType.IC

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Learnings & Edge Cases

• JMS583 is unique for NVMe support: Only USB-SATA bridge that supports NVMe
• UASP support important for performance: JMS567+ support UASP for better performance
• Prefix indicates interface type: JMS = USB, JMB = PCIe board controller, JMF = Flash
• 5-port controllers: JMB575/585 are specifically 5-port SATA controllers
• Legacy JM20xxx series: Still found in older devices, uses 7-character part numbers
• Variable digit length in JMF: JMF series uses variable-length numeric suffixes