
119
2535J–AVR–08/10
ATtiny13
18.5 System and Reset Characteristics
Note:
1. The Power-on Reset will not work unless the supply voltage has been below VPOT (falling)
18.5.1
Brown-Out Detection
Note:
1. VBOT may be below nominal minimum operating voltage for some devices. For devices where
this is the case, the device is tested down to VCC = VBOT during the production test. This guar-
antees that a Brown-out Reset will occur before VCC drops to a voltage where correct
operation of the microcontroller is no longer guaranteed.
18.6 Analog Comparator Characteristics
Note:
All parameters are based on simulation results and they are not tested in production
Table 18-4.
Reset, Brown-out and Internal Voltage Reference Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Units
VPOT
Power-on Reset Threshold Voltage (rising)
TA = -40 to +85°C1.2
V
Power-on Reset Threshold Voltage
TA = -40 to +85°C1.1
V
VRST
RESET Pin Threshold Voltage
VCC = 1.8V - 5.5V
0.2 VCC
0.9 VCC
V
tRST
Minimum pulse width on RESET Pin
VCC = 1.8V - 5.5V
2.5
s
VHYST
Brown-out Detector Hysteresis
50
mV
tBOD
Min Pulse Width on Brown-out Reset
2
s
VBG
Bandgap reference voltage
1.0
1.1
1.2
V
tBG
Bandgap reference start-up time
40
70
s
IBG
Bandgap reference current consumption
15
s
Table 18-5.
VBOT vs. BODLEVEL Fuse Coding
BODLEVEL [1:0] Fuses
Units
11
BOD Disabled
10
1.8
V
01
2.7
00
4.3
Table 18-6.
Analog Comparator Characteristics, TA = -40°C to +85°C
Symbol
Parameter
Condition
Min
Typ
Max
Units
VAIO
Input Offset Voltage
VCC = 5V, VIN = VCC / 2
< 10
40
mV
ILAC
Input Leakage Current
VCC = 5V, VIN = VCC / 2
-50
50
nA
tAPD
Analog Propagation Delay
(from saturation to slight overdrive)
VCC = 2.7V
750
ns
VCC = 4.0V
500
Analog Propagation Delay
(large step change)
VCC = 2.7V
100
VCC = 4.0V
75
tDPD
Digital Propagation Delay
VCC = 1.8V - 5.5
1
2
CLK