Raltron Electronics

<p>The Raltron Electronics AS-3.6864-18-SMD-TR is a low profile microprocessor crystal operating at a nominal frequency of 3.6864 MHz in fundamental mode. It features a frequency tolerance of ±30 ppm at 25°C and a frequency stability of ±50 ppm over the operating temperature range of -20°C to +70°C. The crystal has a load capacitance of 18 pF and a maximum equivalent series resistance (ESR) of 150 Ω.</p><p>&nbsp;</p><p>Designed for surface mount assembly, this crystal is supplied in a tape and reel package with 1000 pieces per reel, conforming to EIA-481 standards. The HC-49/US package has dimensions of 11.35 mm length, 5.00 mm width, and 3.50 mm seated height. The termination finish is tin (Sn).</p><p>&nbsp;</p><p>The component is RoHS, REACH SVHC, and Halogen-Free compliant, with a Moisture Sensitivity Level (MSL) of 1 (unlimited). It is suitable for reflow soldering with a peak temperature of 260°C for up to 10 seconds.</p>

<p>The Raltron CO43025-25.000-EXT-T-TR is a standard crystal oscillator (XO) that generates a precise 25 MHz clock signal. Operating from a nominal 3.3 V supply voltage, this device delivers a CMOS/TTL compatible output with a duty cycle of 45% to 55%. Key electrical specifications include a maximum supply current of 25 mA at 25°C with a 15 pF load, output logic high of minimum 2.8 V, output logic low of maximum 0.4 V, and rise/fall times of 3 ns maximum. The oscillator maintains a frequency stability of ±25 ppm inclusive of initial tolerance, operating temperature range, voltage, and load variations, with RMS jitter of 1 ps maximum.</p><p>&nbsp;</p><p>The device supports an Enable/Disable function on pin 1, allowing the output to be put into a high impedance state. It is designed for a wide operating temperature range of -40°C to +85°C and can be stored from -55°C to +125°C. The oscillator is housed in a compact 4-SMD, no-lead package measuring 7.00 mm x 5.00 mm x 1.80 mm, suitable for surface mount assembly. Performance is verified at a 15 pF CMOS load, making it suitable for general-purpose clock generation in digital systems.</p>

<p>The Raltron Electronics AS-25.000-18-F-SMD-TR is a surface-mount quartz crystal designed for precision timing applications. It operates at a nominal frequency of 25 MHz in fundamental mode, with a load capacitance of 18 pF. The crystal offers a frequency tolerance of ±30 ppm at 25°C and a frequency stability of ±50 ppm over the operating temperature range of -20°C to +70°C, ensuring reliable performance in varied environments.</p><p>&nbsp;</p><p>With a maximum equivalent series resistance (ESR) of 40 Ω and a shunt capacitance of 5 pF, this crystal is well-suited for microprocessor clock circuits and other high-accuracy timing requirements. The drive level is 100 µW typical, with a maximum of 500 µW, and aging is rated at ±5 ppm per year.</p><p>&nbsp;</p><p>Housed in a low-profile HC-49/US package with dimensions of 12.00 x 4.80 x 4.60 mm, it is designed for surface-mount assembly on 24 mm tape with 12 mm pitch, supplied on 178 mm reels in quantities of 1000 pieces. The termination finish is tin (Sn), and the component is RoHS, REACH, and Halogen-Free compliant with MSL Level 1.</p>