Catalog > Semiconductors > Integrated Circuits IC IC 74LS191 Counter Up, Down Synchronous W/Mode CON 16PD 14.25 ZAR inc for 1 Each 252 in Stock Add Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Specifications Logic Type Binary Counter Direction Up, Down Number of Elements 1 Number of Bits per Element 4 Timing Synchronous Count Rate 25 MHz Trigger Type Positive Edge Voltage - Supply 4.75 V ~ 5.25 V Operating Temperature 0°C ~ 70°C Mounting Type Through Hole Package / Case 16-DIP (0.300", 7.62mm) Supplier Device Package 16-PDIP