The DM7490A is a decade and binary counter with a maximum count length (decimal or four-bit binary) and division function.
The DM7490A is a monolithic counter containing four master-slave flip-flops. It is designed to provide a divide-by-two counter and a three-stage binary counter with a count cycle length of divide-by-five. The device features gated zero reset and gated set-to-nine inputs, making it suitable for BCD nine's complement applications. It can also be configured to provide a symmetrical divide-by-ten count.
| Count frequency | 42 MHz |
|---|---|
| Operating Free Air Temperature Range | 0°C to +70°C |
| Clock Frequency (A) | 32 MHz |
| Package Description | 14-Lead Plastic Dual-In-Line Package (PDIP) |
Output QA is connected to input B for BCD count.
The absolute maximum supply voltage is 7V.