The ATS040SM from CTS-Frequency Controls is a 4 MHz crystal with ±30 ppm tolerance, 20 pF load capacitance and 120 Ω maximum resistance in an HC-49/US package.
The ATS040SM-1 from CTS-Frequency Controls is a 4 MHz crystal with ±30 ppm tolerance, 20 pF load capacitance and 120 Ω maximum resistance in an HC-49/US package.
The ATS040SM-1E from CTS-Frequency Controls is a 4 MHz crystal with ±30 ppm tolerance, 20 pF load capacitance and 120 Ω maximum resistance in an HC-49/US package.