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AT90PWM3 Datasheet, PDF (312/365 Pages) ATMEL Corporation – 8-bit Microcontroller with 8K Bytes In-System Programmable Flash
At 19 MHz this gives:
Voltage = 0,9 + 0,15 • 19 = 3,75V
Thus, a maximum frequency of 19 MHz requires VCC = 3.75 V.
Figure 148. Maximum Frequency vs. VCC, AT90PWM2/3
16Mhz
X Mhz
Safe Operating Area
2.7V
5.5V
312 AT90PWM2/3
4317B–AVR–02/05