MK3721 Overview
The MK3721 series of devices includes the original MK3721S and the new MK3721D. The MK3721D is a drop-in replacement for the MK3721S device. pared to the earlier device, the MK3721D offers a wider operating frequency range and improved power supply noise rejection.
MK3721 Key Features
- MK3721D is a drop-in replacement for the earlier
- Packaged in 8-pin SOIC
- Operational frequency range of 16.2 MHz to 28 MHz
- Uses an inexpensive external crystal
- On-chip patented VCXO with pull range of 200 ppm
- VCXO tuning voltage of 0 to 3.3 V
- Operating voltage of 3.3 V
- 12 mA output drive capability at TTL levels
- Advanced, low-power, sub-micron CMOS process
- For frequencies between 1 MHz and 8 MHz, use the
MK3721 Applications
- MK3721D is a drop-in replacement for the earlier
- Packaged in 8-pin SOIC
- Operational frequency range of 16.2 MHz to 28 MHz

