MM74C193N

同步4位加/减十进制计数器。同步4位加/减二进制计数器 Synchronous 4-Bit Up/Down Decade Counter . Synchronous 4-Bit Up/Down Binary Counter

General Description

The MM74C192 and MM74C193 up/down counters are monolithic complementary MOS CMOS integrated circuits. The MM74C192 is a BCD counter, while the MM74C193 is a binary counter.

Counting up and counting down is performed by two count inputs, one being held high while the other is clocked. The outputs change on the positive-going transition of this clock.

Features

■ High noise margin: 1V guaranteed

■ Tenth power TTL compatible: Drive 2 LPTTL loads

■ Wide supply range: 3V to 15V

■ Carry and borrow outputs for N-bit cascading

■ Asynchronous clear

■ High noise immunity: 0.45 VCC typ.