
210
8008H–AVR–04/11
ATtiny48/88
Note:
1. Values are guidelines, only
2. The Power-on Reset will not work unless the supply voltage has been below VPOT (falling)
Note:
1. V
BOT may be below nominal minimum operating voltage for some devices. For devices where
this is the case, the device is tested down to V
CC = 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.
22.6
Analog Comparator Characteristics
Note:
All parameters are based on simulation results and are not tested in production
VHYST
Brown-out Detector
Hysteresis
50
mV
tBOD
Min Pulse Width on
Brown-out Reset
2s
VBG
Internal bandgap reference
voltage
VCC = 5V
TA = 25°C
1.0
1.1
1.2
V
tBG
Internal bandgap reference
start-up time
VCC = 5V
TA = 25°C
40
70
s
IBG
Internal bandgap reference
current consumption
VCC = 5V
TA = 25°C
15
A
Table 22-4.
V
BODLEVEL[2:0] Fuses
Min
Typ
Max
Units
111
BOD Disabled
110
1.7
1.8
2.0
V
101
2.5
2.7
2.9
100
4.1
4.3
4.5
0XX
Reserved
Table 22-3.
Reset, Brown-out, and Internal Voltage Characteristics (1) (Continued)
Symbol
Parameter
Condition
Min
Typ
Max
Units
Table 22-5.
Analog Comparator Characteristics, T
A = -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 - 5.5V
1
2
CLK