IQD Frequency Products Manufacturer Skill

Manufacturer Overview

IQD (International Quartz Devices) is a UK-based manufacturer specializing in frequency control products. Their product range includes:

• Crystals: Low frequency, standard, SMD, and through-hole crystal units
• Oscillators: Standard clock oscillators (XO)
• TCXOs: Temperature Compensated Crystal Oscillators
• VCXOs: Voltage Controlled Crystal Oscillators
• OCXOs: Oven Controlled Crystal Oscillators
• Clock Modules: Integrated timing solutions
• RTC Modules: Real-Time Clock modules
• Filters: Crystal filters, SAW filters, resonator bandpass

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MPN Structure

IQD MPNs follow product-family-specific structures:

Crystal Units

[PREFIX][SIZE]-[FREQUENCY]-[TOLERANCE]-[LOAD]-[TEMP]
   |      |        |           |        |       |
   |      |        |           |        |       +-- Temperature range
   |      |        |           |        +-- Load capacitance
   |      |        |           +-- Frequency tolerance (PPM)
   |      |        +-- Frequency value
   |      +-- Size code (e.g., 016, 020, 032)
   +-- Series prefix (CFPX, XTALS, XTAL, LFXTAL)

Oscillators (XO, TCXO, VCXO, OCXO)

[PREFIX]-[SIZE][SPEC]-[FREQUENCY]-[STABILITY]-[OUTPUT]
   |       |     |         |          |          |
   |       |     |         |          |          +-- Output type
   |       |     |         |          +-- Stability (PPM)
   |       |     |         +-- Frequency value
   |       |     +-- Specification variant (H=High freq, L=Low power)
   |       +-- Package size code (21, 25, 32, 50, 70, 90)
   +-- Family prefix (IQXO, IQTX, IQVCXO, IQOCXO)

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Example Decoding

Crystal Examples

CFPX-032-16.000MHz-10ppm
|    |      |        |
|    |      |        +-- 10 PPM frequency tolerance
|    |      +-- 16.000 MHz frequency
|    +-- 032 = 3.2 x 2.5mm package
+-- Standard Crystal series

XTALS-020-8.000MHz
|     |      |
|     |      +-- 8.000 MHz frequency
|     +-- 020 = 2.0 x 1.6mm package
+-- SMD Crystal series

LFXTAL-25.000kHz
|        |
|        +-- 25.000 kHz (low frequency)
+-- Low Frequency Crystal series

Oscillator Examples

IQXO-32-16.000MHz
|    |     |
|    |     +-- 16.000 MHz output frequency
|    +-- 32 = 3.2 x 2.5mm package
+-- Standard Oscillator

IQXO-L50-1.000MHz
|    ||    |
|    ||    +-- 1.000 MHz frequency
|    |+-- 50 = 5.0 x 3.2mm package
|    +-- L = Low Power variant
+-- Low Power Oscillator

IQTX-H25-10.000MHz-0.5PPM
|    ||     |         |
|    ||     |         +-- 0.5 PPM stability
|    ||     +-- 10.000 MHz frequency
|    |+-- 25 = 2.5 x 2.0mm package
|    +-- H = High Stability variant
+-- High Stability TCXO

IQVCXO-32-100.000MHz
|      |      |
|      |      +-- 100.000 MHz center frequency
|      +-- 32 = 3.2 x 2.5mm package
+-- Voltage Controlled Crystal Oscillator

IQOCXO-H70-10.000MHz-1PPB
|      ||     |        |
|      ||     |        +-- 1 PPB (parts per billion) stability
|      ||     +-- 10.000 MHz frequency
|      |+-- 70 = 7.0 x 5.0mm package
|      +-- H = High Stability variant
+-- High Stability Oven Controlled Crystal Oscillator

Module Examples

IQCM-100-25.000MHz
|       |     |
|       |     +-- 25.000 MHz output
|       +-- Series/variant code
+-- Clock Module

IQRTC-32768Hz
|        |
|        +-- 32.768 kHz (standard RTC frequency)
+-- RTC Module

IQXF-455kHz
|      |
|      +-- 455 kHz center frequency
+-- Crystal Filter

IQSPF-100.000MHz
|       |
|       +-- 100.000 MHz center frequency
+-- SAW Filter

---

Package Codes

Crystal Packages (CFPX, XTALS series)

Size codes appear after a dash and indicate package dimensions:

Code	Package Size	Common Use
016	1.6 x 1.2mm	Ultra-small SMD
020	2.0 x 1.6mm	Small SMD
025	2.5 x 2.0mm	Standard SMD
032	3.2 x 2.5mm	Standard SMD (most common)
050	5.0 x 3.2mm	Larger SMD
070	7.0 x 5.0mm	Large SMD

Oscillator Packages (IQXO, IQTX, IQVCXO, IQOCXO series)

Size codes appear after the dash (or after H/L modifier):

Code	Package Size	Common Use
21	2.0 x 1.6mm	Ultra-compact oscillators
25	2.5 x 2.0mm	Compact oscillators
32	3.2 x 2.5mm	Standard oscillators
50	5.0 x 3.2mm	Standard/high stability
70	7.0 x 5.0mm	High stability / OCXO
90	9.0 x 7.0mm	High stability OCXO

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Component Type Prefixes

Crystal Prefixes

Prefix	Component Type	Description
LFXTAL	Low Frequency Crystal	32.768 kHz and other low frequencies
CFPX	Standard Crystal	General purpose SMD crystals
XTALS	SMD Crystal	Surface mount crystal units
XTAL	Through-hole Crystal	Leaded crystal units (HC-49, etc.)

Oscillator Prefixes

Prefix	Component Type	Description
IQXO	Standard Oscillator	Basic clock oscillator (XO)
IQXO-H	High Frequency Oscillator	Higher frequency range XO
IQXO-L	Low Power Oscillator	Reduced power consumption XO
IQTX	TCXO	Temperature Compensated Crystal Oscillator
IQTX-H	High Stability TCXO	Tighter frequency stability
IQTX-L	Low Power TCXO	Reduced power consumption
IQVCXO	VCXO	Voltage Controlled Crystal Oscillator
IQVCXO-H	High Stability VCXO	Tighter frequency stability
IQOCXO	OCXO	Oven Controlled Crystal Oscillator
IQOCXO-H	High Stability OCXO	Ultra-stable (PPB range)

Module and Filter Prefixes

Prefix	Component Type	Description
IQCM	Clock Module	Integrated clock/timing module
IQRTC	RTC Module	Real-Time Clock module
IQXF	Crystal Filter	Crystal-based bandpass filter
IQSPF	SAW Filter	Surface Acoustic Wave filter
IQRB	Resonator Bandpass	Resonator-based bandpass filter

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Supported Component Types

The IQDHandler supports these component types:

ComponentType	Description
CRYSTAL	Base crystal type
CRYSTAL_IQD	IQD-specific crystal
OSCILLATOR	Base oscillator type
OSCILLATOR_IQD	IQD standard oscillator
OSCILLATOR_TCXO_IQD	IQD TCXO
OSCILLATOR_VCXO_IQD	IQD VCXO
OSCILLATOR_OCXO_IQD	IQD OCXO
CRYSTAL_FILTER_IQD	IQD crystal filter
RTC_MODULE_IQD	IQD RTC module

---

Handler Implementation Notes

Package Code Extraction

// For crystals (CFPX, XTALS), size code is 3 digits after dash
// CFPX-032-16.000MHz → dashIndex=4, extract positions 5-7 → "032"
int dashIndex = upperMpn.indexOf('-');
if (dashIndex > 0 && dashIndex + 4 <= upperMpn.length()) {
    String sizeCode = upperMpn.substring(dashIndex + 1, dashIndex + 4);
    // Map to readable format
}

// For oscillators (IQXO, IQTX, etc.), size code is 2 digits
// Split by dash, take first 2 chars of second part
// IQXO-32-16.000MHz → parts[1]="32..." → pkgCode="32"
String[] parts = upperMpn.split("-");
if (parts.length >= 2) {
    String pkgCode = parts[1].substring(0, 2);
    // Map to readable format
}

Series Extraction

// Series extraction uses prefix matching with variant detection
// More specific variants (H, L) checked before base prefix

if (upperMpn.startsWith("IQXO")) {
    if (upperMpn.startsWith("IQXO-H")) return "High Frequency Oscillator";
    if (upperMpn.startsWith("IQXO-L")) return "Low Power Oscillator";
    return "Standard Oscillator";  // Base case last
}

if (upperMpn.startsWith("IQTX")) {
    if (upperMpn.startsWith("IQTX-H")) return "High Stability TCXO";
    if (upperMpn.startsWith("IQTX-L")) return "Low Power TCXO";
    return "Standard TCXO";
}

Replacement Compatibility Logic

// IQDHandler implements sophisticated replacement logic:
// 1. Same series required (or compatible upgrade)
// 2. Same package size required
// 3. Same frequency required
// 4. Better or equal stability allowed

// Compatible upgrades:
// - High Stability can replace Standard (e.g., IQTX-H → IQTX)
// - Low Power variants may be compatible with Standard

// Stability comparison:
// Lower PPM value = better stability
// A 0.5 PPM part can replace a 2.5 PPM part

---

Stability Grades

Frequency stability is a key specification for timing products:

Grade	Typical PPM	Application
Standard	+/- 20-100	General purpose
Medium	+/- 2.5-10	Precision timing
High	+/- 0.5-2.5	High accuracy
Ultra	+/- 0.1-0.5	Precision instruments
OCXO	PPB range	Ultra-stable references

---

Common Frequency Values

Standard Crystal Frequencies

Frequency	Common Application
32.768 kHz	RTC, watch crystals
4.000 MHz	General purpose
8.000 MHz	Microcontrollers
12.000 MHz	USB (12 Mbps)
16.000 MHz	Microcontrollers
20.000 MHz	General purpose
25.000 MHz	Ethernet PHY
48.000 MHz	USB (480 Mbps)

Standard Oscillator Frequencies

Frequency	Common Application
1.000 MHz	Low frequency reference
10.000 MHz	Reference standard
12.288 MHz	Audio (48 kHz * 256)
19.200 MHz	Telecom reference
24.576 MHz	Audio (96 kHz * 256)
100.000 MHz	High-speed systems

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Related Files

• Handler:

  manufacturers/IQDHandler.java

• Component types:

  CRYSTAL

  ,

  CRYSTAL_IQD

  ,

  OSCILLATOR

  ,

  OSCILLATOR_IQD

  ,

  OSCILLATOR_TCXO_IQD

  ,

  OSCILLATOR_VCXO_IQD

  ,

  OSCILLATOR_OCXO_IQD

  ,

  CRYSTAL_FILTER_IQD

  ,

  RTC_MODULE_IQD

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Known Issues (Technical Debt)

The IQDHandler has these documented issues:

1. HashSet in getSupportedTypes() - Should use

   Set.of()

   for immutability
2. Missing IC type - Handler registers patterns for

   ComponentType.IC

   (clock modules, RTC, filters) but does not include

   IC

   in

   getSupportedTypes()

3. No handler tests - Listed in handlers without tests in CLAUDE.md

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Learnings & Quirks

• Variant modifiers (H, L): Appear between prefix and size code (e.g., IQXO-H32 vs IQXO-32). The handler correctly checks for these before falling back to base series.
• Package extraction differs by product type: Crystals use 3-digit codes after dash, oscillators use 2-digit codes. The handler splits logic based on prefix.
• Replacement compatibility: IQD handler includes sophisticated replacement logic that considers stability grades - better stability parts can replace worse ones but not vice versa.
• PPM vs PPB: OCXOs use parts-per-billion (PPB) while other products use parts-per-million (PPM). Both are extracted as stability grades.
• IQTX vs IQXO: Easy to confuse - IQTX is TCXO (Temperature Compensated), IQXO is standard XO (crystal oscillator).
• Missing IC in getSupportedTypes(): Clock modules (IQCM), RTC modules (IQRTC), and filters (IQXF, IQSPF, IQRB) are registered under

  ComponentType.IC

  but IC is not in the supported types set.

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