The recommended operating voltage range for STK14C88-5L45M is 4.5V to 5.5V.
The power-up sequence should be VCC first, then VPP, and then other inputs. The power-down sequence should be the reverse of the power-up sequence.
The maximum clock frequency supported by STK14C88-5L45M is 45 MHz.
A simple reset circuit can be implemented using a resistor, capacitor, and a diode. The reset pin should be pulled up to VCC through a resistor and a capacitor should be connected between the reset pin and ground.
The VPP pin is used to program the device. It should be connected to a programming voltage (typically 12V) during programming and to VCC during normal operation.