ECS-21K-15B

Overview

The ECS-21K-15B is a monolithic crystal filter manufactured by ECS Inc. International, designed for through-hole mounting. It operates at a center frequency of 21.4 MHz with a bandwidth of 15 kHz. The component features four poles and exhibits an insertion loss of 2 dB. Its impedance is specified as 1.5 kOhms, and it maintains a ripple of 1 dB. The device functions within an operating temperature range of -20°C to 70°C.

Feature Summary

• Monolithic construction for stable filtering performance
• Four-pole design for effective signal selection
• Through-hole mounting capability

Applications

• Intermediate frequency (IF) filtering in communication receivers
• Signal processing circuits requiring precise frequency selection
• Audio or data transmission systems utilizing 21.4 MHz carriers

Procurement Notes

Verify the specific datasheet version from ECS Inc. International to confirm all electrical parameters match application requirements. Ensure that the through-hole footprint aligns with the PCB design constraints. Cross-reference the operating temperature range against environmental conditions to guarantee reliable performance under all expected operational scenarios.

Selection Notes

Select this component when a 21.4 MHz center frequency with 15 kHz bandwidth is required. Consider the 1.5 kOhms impedance and 2 dB insertion loss for circuit matching. The four-pole configuration offers steep skirt selectivity suitable for narrowband applications. Verify thermal stability needs against the -20°C to 70°C range.

Part Context

This part belongs to the monolithic crystal filter category from ECS Inc. International. These components are engineered for high Q-factor performance and compact size compared to discrete crystal assemblies. The 21K series typically targets cost-effective solutions for consumer electronics and industrial communication devices requiring reliable frequency control.

FAQ

What is the insertion loss of the ECS-21K-15B?

The insertion loss is 2 dB.

How many poles does this filter have?

It has four poles.