The Intersil ACTS161MS is a radiation hardened 4-bit binary synchronous counter, featuring asynchronous reset and load ahead carry logic. The ACTS161MS utilizes advanced CMOS/SOS technology to achieve high-speed operation. This device is a member of the radiation hardened, high-speed, CMOS/SOS logic family. The ACTS161MS is supplied in a 16-lead ceramic flatpack (K suffix) or a ceramic dual in-line package (D suffix).