description/ordering information
●The CD54/74HC190 are asynchronously presettable BCD decade counters, whereas the CD54/74HC191 and CD54/74HCT191 are asynchronously presettable binary counters.
●• 2-V to 6-V VCC Operation (’HC190, 191)
●• 4.5-V to 5.5-V VCC Operation (’HCT191)
●• Wide Operating Temperature Range of −55°C to 125°C
●• Synchronous Counting and Asynchronous Loading
●• Two Outputs for n-Bit Cascading
●• Look-Ahead Carry for High-Speed Counting
●• Balanced Propagation Delays and Transition Times
●• Standard Outputs Drive Up To 15 LS-TTL Loads
●• Significant Power Reduction Compared to LS-TTL Logic ICs
