ABLS2-4.000MHZ-D4Y-T is a low profile HC/49US surface mount microprocessor crystal operating at 4.000 MHz in fundamental mode. This RoHS compliant crystal features a compact package size of 11.4 x 4.7 x 3.3 mm with a reduced height of 3.3 mm, making it suitable for thin equipment designs. It operates over a temperature range of -40°C to +85°C with a frequency tolerance of ±30 ppm at 25°C and frequency stability of ±30 ppm over the operating temperature range. The crystal has an ESR of 180O maximum for the 4.000 MHz frequency range, shunt capacitance of 7 pF maximum, and standard load capacitance of 18 pF. Common applications include computers, modems, microprocessors, and wireless applications where tight stability and extended temperature performance are required.