J12.017-SOL28

Jauch SOL28 12.0MHz AT-cut fundamental quartz crystal, HC-49/US SMD, 12pF, ±30ppm, ESR 100Ω max, -40 to +85°C

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Manufacturer Part：

J12.017-SOL28

Package：

HC-49/US SMD Metal Can (11.7 x 4.8 x 4.0 mm)

Description

Product Overview

The J12.017-SOL28 from Jauch Quartz is a 12.0 MHz AT-cut fundamental mode quartz crystal in the SOL28 (HC-49/US) surface-mount metal can package. The HC-49/US is one of the most widely used crystal packages in the electronics industry, offering proven reliability and excellent frequency stability for microcontroller clock and communication timing applications.

Key Specifications

Manufacturer	Jauch Quartz
Frequency	12.0 MHz
Operating Mode	Fundamental AT-cut
Frequency Tolerance	±30 ppm at 25°C
Frequency Stability	±30 ppm (-40°C to +85°C)
Load Capacitance	12 pF (standard)
ESR (Series Resistance)	100 Ohm max / 50 Ohm typical (12.0-12.999 MHz range)
Shunt Capacitance C0	< 7 pF
Drive Level	100 µW max
Aging (1st year)	< ±3 ppm
Operating Temperature	-40°C to +85°C
Storage Temperature	-40°C to +125°C
Package	HC-49/US (SOL28) SMD Metal Can, 11.7 x 4.8 x 4.0 mm
RoHS	Compliant (LF suffix)

Features

12.0 MHz AT-cut fundamental quartz crystal
HC-49/US (SOL28) surface-mount metal can package
Industry-standard footprint compatible with multiple manufacturers
12 pF standard load capacitance
ESR 100 Ohm max for 12 MHz range
±30 ppm frequency tolerance and stability
Reflow soldering compatible
RoHS compliant lead-free

Applications

Microcontroller clock oscillation circuits
Communication system timing references
Industrial control system clocking
USB and UART baud rate generation
Consumer electronics system clock
Embedded processor timing

Product Introduction:J12.017-SOL28 Product Introduction

The J12.017-SOL28 from Jauch Quartz is a 12.0 MHz AT-cut fundamental mode quartz crystal in the SOL28 (HC-49/US) surface-mount metal can package. The 12 MHz frequency is one of the most commonly used clock frequencies in embedded systems, providing a convenient reference for UART baud rate generation (12 MHz divides to standard baud rates with minimal error) and general-purpose microcontroller clocking. The HC-49/US package (also designated SOL28 by Jauch) is an industry-standard footprint that is pin-compatible with equivalent crystals from multiple manufacturers including Epson, NDK, TXC, and Fox Electronics. The ±30 ppm frequency tolerance at 25°C and ±30 ppm stability over the -40°C to +85°C operating range provide sufficient accuracy for most industrial and consumer applications.

Working Principle:J12.017-SOL28 Working Principle

The J12.017-SOL28 operates as a piezoelectric resonator using the inverse piezoelectric effect of an AT-cut quartz crystal blank. When an electric field is applied across the quartz wafer, it mechanically deforms at a precise resonant frequency determined by the wafer thickness. For a 12.0 MHz fundamental AT-cut crystal, the wafer thickness is approximately 0.139 mm. The AT-cut orientation (35.25 degrees from the Z-axis) provides a near-zero temperature coefficient around room temperature with a cubic frequency-temperature characteristic. In a Pierce oscillator circuit, the crystal operates as a highly selective bandpass filter in the feedback path, with the 12 pF load capacitance forming the phase-shift network. The oscillation frequency is determined by f = fS × (1 + C1 / (2 × (C0 + CL))).

Pin Description:J12.017-SOL28 Pin Definition and Functions

Pin	Name	Type	Function
1	Crystal Terminal 1	Passive	Connects to oscillator amplifier input or output
2	Crystal Terminal 2	Passive	Connects to oscillator amplifier output or input

Application Scenarios:In which products and applications isJ12.017-SOL28 used

MCU Clock: Provides 12 MHz system clock for 8-bit and 32-bit microcontrollers in Pierce oscillator configuration with 12pF external load capacitors.
UART Timing: Baud rate generation for serial communication where 12 MHz divides to standard baud rates (9600, 19200, 115200) with minimal error.
Industrial Control: Clock reference for PLCs and motor controllers with ±30ppm stability ensuring reliable communication timing.
Consumer Electronics: System clock for home appliances and consumer devices with HC-49/US industry-standard footprint.

Alternative Models:What chips are recommended as replacements for J12.017-SOL28

Manufacturer	Part Number	Package	Frequency	Notes
Epson	CA-301 12.000MHz	HC-49/US	12 MHz	Pin-compatible direct replacement
TXC	9B-12.000MEEJ-B	HC-49/US	12 MHz	Pin-compatible alternative
NDK	NX5032GA 12.000MHz	5×3.2mm	12 MHz	Smaller 5032 alternative
Jauch	Q 12.0-JXS32-12-30/30-T1-LF	3.2×2.5mm	12 MHz	Compact 3225 alternative