Decade / 4-Bit binary counters with Clear The HD14160B to HD14163B are synchronous programmable counters and functionally equivalent to the 74160 to 74163 TTL counters. 4-bit Binary counter with synchronous Clears(带同步清除的4位二进制计数 Decade counter with Synchronous Clears(带同步清除的十进制计数器) 4-bit Binary counter with Asynchronous Clears(带异步清除的4位二进制计数