The XD4518 with DIP-16 Counters / Dividers ROHS is a 16-pin, dual decade counter/divider manufactured by XINLUDA. It uses a presettable BCD counter, where the count frequency is selected by two select inputs (A and B) to divide the input frequency either by 2, 4, 8, 16, 32, 64, 128, or 256. It has an AS/LS cascadable feature, which allows for two XD4518s to be connected together to make a 4-digit counter. The XD4518 operates with a supply voltage of 5V, and when the power is off, the counter holds the last count value. The counter circuits are designed for maximum jamming immunity. There are also TTL and CMOS compatible inputs and outputs. The Device also has components compliant with RoHS guidelines.