Datasheet ATtiny24A, ATtiny44A, ATtiny84A. Appendix B. Specification at 125°C (Microchip) - 6

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2.4 Clock Characteristics 2.4.1 Accuracy of Calibrated Internal Oscillator
It is possible to manually calibrate the internal oscillator to be more accurate than default factory calibration. Note that oscillator frequency depends on temperature and voltage. Voltage and temperature characteristics can be found in Figure 3-45 on page 33.
Table 2-2. Calibration Accuracy of Internal RC Oscillator Accuracy at given Calibration Method Target Frequency VCC Temperature voltage & temperature
(1) Factory Calibration 8.0 MHz 3V 25C ±10% Fixed frequency: Fixed voltage: Fixed temperature: User Calibration ±1% 7.3 – 8.1 MHz 1.8V – 5.5V -40C to +125C Note: 1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
2.5 System and Reset Characteristics 2.5.1 Power-On Reset Table 2-3. Characteristics of Enhanced Power-On Reset. TA = -40 to +125°C Symbol Parameter Min
(1)
Typ
(1)
Max
(1)
Units
VPOR Release threshold of power-on reset (2) 1.1 1.4 1.7 V V Activation threshold of power-on reset (3) 0.6 1.3 1.7 V POA SR Power-On Slope Rate 0.01 V/ms ON Notes: 1. Values are guidelines, only 2. Threshold where device is released from reset when voltage is rising 3. The Power-on Reset will not work unless the supply voltage has been below VPOA
2.6 Analog Comparator Characteristics Table 2-4. Analog Comparator Characteristics, TA = -40°C to +125°C Symbol Parameter Condition Min Typ Max Units
V Input Offset Voltage V = 5V, V = V / 2 < 10 40 mV AIO CC IN CC I Input Leakage Current V = 5V, V = V / 2 -0.5 0.5 µA LAC CC IN CC Analog Propagation Delay VCC = 2.7V 750 (from saturation to slight overdrive) V = 4.0V 500 CC tAPD ns Analog Propagation Delay V = 2.7V 100 CC (large step change) VCC = 4.0V 75 tDPD Digital Propagation Delay VCC = 1.8V - 5.5 1 2 CLK Note: All parameters are based on simulation results and are not tested in production ATtiny24A/44A/84A [DATASHEET APPENDIX B] 6 8183H–AVR–10/2013 Document Outline Appendix B – ATtiny24A/44A/84A Specification at 125°C 1. Memories 1.1 EEPROM Data Memory 2. Electrical Characteristics 2.1 Absolute Maximum Ratings* 2.2 DC Characteristics 2.3 Speed 2.3.1 ATtiny24A and ATtiny44A 2.3.2 ATtiny84A 2.4 Clock Characteristics 2.4.1 Accuracy of Calibrated Internal Oscillator 2.5 System and Reset Characteristics 2.5.1 Power-On Reset 2.6 Analog Comparator Characteristics 2.7 ADC Characteristics 2.8 Serial Programming Characteristics 2.8.1 ATtiny24A and ATtiny44A 2.8.2 ATtiny84A 3. Typical Characteristics 3.1 ATtiny24A 3.1.1 Current Consumption in Active Mode 3.1.2 Current Consumption in Idle Mode 3.1.3 Current Consumption in Power-down Mode 3.1.4 Current Consumption of Peripheral Units 3.1.5 Pull-up Resistors 3.1.6 Output Driver Strength 3.1.7 Input Threshold and Hysteresis (for I/O Ports) 3.1.8 BOD, Bandgap and Reset 3.1.9 Analog Comparator Offset 3.1.10 Internal Oscillator Speed 3.2 ATtiny44A 3.2.1 Current Consumption in Active Mode 3.2.2 Current Consumption in Idle Mode 3.2.3 Current Consumption in Power-down Mode 3.2.4 Current Consumption of Peripheral Units 3.2.5 Pull-up Resistors 3.2.6 Output Driver Strength 3.2.7 Input Threshold and Hysteresis (for I/O Ports) 3.2.8 BOD, Bandgap and Reset 3.2.9 Analog Comparator Offset 3.2.10 Internal Oscillator Speed 3.3 ATtiny84A 3.3.1 Current Consumption in Active Mode 3.3.2 Current Consumption in Idle Mode 3.3.3 Current Consumption in Power-down Mode 3.3.4 Current Consumption in Reset 3.3.5 Current Consumption of Peripheral Units 3.3.6 Pull-up Resistors 3.3.7 Output Driver Strength 3.3.8 Input Threshold and Hysteresis (for I/O Ports) 3.3.9 BOD, Bandgap and Reset 3.3.10 Analog Comparator Offset 3.3.11 Internal Oscillator Speed 4. Ordering Information 4.1 ATtiny24A 4.2 ATtiny44A 4.3 ATtiny84A 5. Revision History