TCO-987F1-32.768MHZ TCO-987L 19.68MHZ TCO-987N(14.4MHz) TCO-987Y1-16.384MHZ TCO-988A TCO-988A4.096MHZ TCO-990M4 TCO-990N2 TCO-990N2-13MHz TCO-998N-13.00MHZ