O 100.0-JOH32-A-3.3-T1-IP-LF

100 MHz HCSL crystal oscillator, 3.3V, ±100ppm, -40 to +85C, 3.2x2.5mm, 3rd overtone, inverting output

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Manufacturer Part：

O 100.0-JOH32-A-3.3-T1-IP-LF

Package：

3.2 x 2.5 x 0.95 mm (4-Pad SMD)

Description

Product Overview

The O 100.0-JOH32-A-3.3-T1-IP-LF is a Jauch Quartz product designed for electronic applications. It features compact design with reliable performance characteristics suitable for various industrial and consumer applications.

Key Specifications

Type	SMD Crystal Oscillator (XO) – HCSL Output
Series	JOH32 (3rd Overtone)
Frequency	100.000 MHz
Frequency Stability Over All	+/- 100 ppm (A code)
Supply Voltage VDC	3.3V
Output Type	HCSL (High-Speed Current Steering Logic)
Frequency Range (Series)	13.5 ~ 160.0 MHz
Operating Temperature	-40C to +85C (T1)
Package	3.2 x 2.5 x 0.95 mm, 4-Pad SMD
Option	IP = Inverting output pair
RoHS	Compliant (LF suffix)

Features

100 MHz HCSL output crystal oscillator; JOH32 3.2×2.5mm compact package; 3rd overtone crystal technology; HCSL (High-Speed Current Steering Logic) output; 3.3V supply voltage; ±100ppm frequency stability (A code) over -40C to +85C (T1); Inverting output pair option (IP); Compact 3225 footprint; Industrial temperature range; RoHS compliant lead-free (LF)

Applications

PCI Express (PCIe) reference clock; Server and workstation timing; Chipset clock distribution; Network processor clock; Storage controller timing; High-speed digital logic; PCIe Gen 1/2/3 clocking; Motherboard clock generation

Product Introduction:O 100.0-JOH32-A-3.3-T1-IP-LF Product Introduction

The O 100.0-JOH32-A-3.3-T1-IP-LF from Jauch Quartz is a 100 MHz HCSL (High-Speed Current Steering Logic) crystal oscillator in the compact JOH32 3.2 x 2.5mm package, designed specifically for PCI Express reference clock applications. The JOH32 series uses 3rd overtone crystal technology to achieve frequencies from 13.5 to 160.0 MHz in a small 3225 footprint. HCSL output is the standard signaling for PCIe reference clocks, providing differential current-mode drive with typical 700mV swing centered at approximately 350mV, compatible with PCIe PHY clock receivers. The 100 MHz frequency is the standard PCIe reference clock from which all PCIe data rates are derived: 100 MHz x 1 = 2.5 GT/s (Gen1), x 2 = 5.0 GT/s (Gen2), x 4 = 8.0 GT/s (Gen3). The A stability code specifies ±100ppm total frequency accuracy, which is sufficient for PCIe clocking where the specification allows ±300ppm. The IP (Inverting Pair) option provides a complementary output pair for differential clock distribution.

Working Principle:O 100.0-JOH32-A-3.3-T1-IP-LF Working Principle

The O 100.0-JOH32-A-3.3-T1-IP-LF operates as a crystal oscillator with HCSL (High-Speed Current Steering Logic) output, specifically designed for PCI Express reference clock applications. The internal 3rd overtone AT-cut quartz crystal resonates at 100 MHz, which is a frequency too high for fundamental-mode crystals in this package size. The 3rd overtone mode uses the third harmonic of the crystal’s fundamental thickness-shear resonance, where the crystal wafer is approximately 3 times thicker than a fundamental-mode crystal at the same frequency, providing better mechanical robustness and lower ESR. The HCSL output uses current-steering logic where the output driver sources approximately 17mA into a 50-ohm termination to ground, creating a voltage swing of approximately 700mV. The differential HCSL pair (with IP inverting option) provides complementary signals for common-mode noise rejection in high-speed PCB layouts. The HCSL levels are defined by the PCIe specification: typical swing 700mV, crossing voltage approximately 350mV, rise/fall time less than 300ps.

Pin Description:O 100.0-JOH32-A-3.3-T1-IP-LF Pin Definition and Functions

Pin	Name	Type	Function
1	Output+ (or E/D)	Output	HCSL true output; or enable/disable control depending on configuration
2	GND	Power	Ground connection
3	Output- (IP option)	Output	HCSL complementary (inverted) output for differential clock distribution
4	VDC	Power	3.3V power supply

Application Scenarios:In which products and applications isO 100.0-JOH32-A-3.3-T1-IP-LF used

PCI Express Reference Clock: Provides the 100 MHz HCSL reference clock required by PCIe Gen1/2/3 root complexes and endpoints with standard-compliant HCSL signaling levels.
Server Clock Distribution: 100 MHz HCSL clock source for server chipsets and CPUs where differential signaling provides noise immunity in high-speed digital environments.
Storage Controller: Reference clock for NVMe and SAS storage controllers using PCIe interface with the compact 3225 footprint minimizing board area.
Networking Processor: System clock for network processors and switches requiring 100 MHz PCIe-compatible reference with ±100ppm stability for protocol compliance.

Alternative Models:What chips are recommended as replacements for O 100.0-JOH32-A-3.3-T1-IP-LF

Manufacturer	Part Number	Package	Frequency	Notes
Jauch	O 100.0-JOH22-A-3.3-T1-IP-LF	2.5×2.0mm	100 MHz	Smaller 2520 package version
Jauch	O 100.0-JOH75-A-3.3-T1-IP-LF	7x5mm	100 MHz	Larger 7050 package
SiTime	SIT8208AI-8F-33E-100.000000T	3.2×2.5mm	100 MHz	MEMS-based HCSL alternative
Epson	SG-3225EAN 100.0000MHz	3.2×2.5mm	100 MHz	HCSL XO alternative

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