SN54HC161, SN74HC161

4BIT SYNCHRONOUS BINARY COUNTERS

SCLS297D − JANUARY 1996 − REVISED SEPTEMBER 2003

10

POST OFFICE BOX 655303

APPLICATION INFORMATION

n-bit synchronous counters

This application demonstrates how the look-ahead carry circuit can be used to implement a high-speed n-bit

can be used with this fast look-ahead circuit.

The application circuit shown in Figure 2 is not valid for clock frequencies above 18 MHz (at 25

°C and

succeeding stage’s RCO. This glitch is common to all HC vendors that Texas Instruments has evaluated, in

addition to the bipolar equivalents (LS, ALS, AS).