CS20-25.000MABJ-UT

Crystals Overview

The CS20-25.000MABJ-UT is a surface-mount AT-cut ceramic crystal manufactured by Citizen Finedevice Co Ltd. It operates at a nominal frequency of 25 MHz with a load capacitance of 18 pF and an equivalent series resistance (ESR) of 50 Ohms. The component provides a frequency stability of ±30 ppm and supports a base harmonic mode. Designed for SMD/SMT installation, it features a 4-SMD, no-lead package measuring 11.60 mm in length, 5.50 mm in width, and 2.20 mm in height. The unit is rated for an operating temperature range from -10°C to +60°C.

Crystals Feature Summary

• Utilizes AT-cut ceramic construction for stable oscillation characteristics.
• Designed for surface-mount technology (SMD) integration on printed circuit boards.
• Supports base harmonic operation mode for fundamental frequency generation.

Crystals Applications

• General-purpose clock signal generation in electronic circuits
• Timing reference sources for microcontroller systems
• Oscillator circuits requiring standard surface-mount footprints

Crystals Procurement Notes

This component is officially classified as obsolete and no longer manufactured by Citizen FineDevice. Procurement is restricted to existing distributor inventory or surplus stock. Buyers must verify the actual condition of available units against original specifications before acquisition. Due to the discontinued status, long-term supply continuity cannot be guaranteed, and alternative sourcing strategies should be evaluated immediately for production needs.

Crystals Selection Notes

Engineers selecting this part must account for its obsolete lifecycle status when designing new products. While the electrical parameters such as 25 MHz frequency and 18 pF load capacitance are standard, the lack of future manufacturing support poses a significant risk for mass production. Design reviews should prioritize identifying pin-compatible or functionally equivalent active components that offer verified supply chain availability and updated datasheets.

Crystals Part Context

The CS20-25.000MABJ-UT belongs to the CS20 series of ceramic crystals produced by Citizen FineDevice. This series typically offers compact surface-mount solutions for timing applications. The specific model represents a 25 MHz variant within this lineup, characterized by its 4-SMD no-lead form factor. As an obsolete item, it serves primarily as a replacement part for legacy equipment maintenance rather than a component for new design implementations.

Crystals Replacement Considerations

Publicly confirmed substitute part numbers for this obsolete component include ABC2-25.000MHZ-4-T from Abracon LLC and ECS-35-17-25-TR from ECS Inc. These alternatives are identified as similar functional replacements in distributor databases. Engineers should validate mechanical dimensions and electrical parameters against the original datasheet before substituting these parts in existing designs.