MF ELETRONICS M1400 M1436 M1444 M1445 M1500 M1536 M1544 M1545 M2400 M2436 M2444 M2445 M2500 M2536 M2544 M2545 handbook This document introduces the features and characteristics of MF Electronics' ECL and PECL crystal oscillators, including single or dual complementary outputs, start-up time, stability, temperature range, etc.