Rainbow Electronics ATtiny43U - Manual (Page 156)

156
8048B–AVR–03/09
ATtiny43U
Notes: 1. “Max” means the highest value where the pin is guaranteed to be read as low.
2. Not tested in production.
3. “Min” means the lowest value where the pin is guaranteed to be read as high.
4. Although each I/O port can under steady state (non-transient) conditions sink more than indicated, the sum of all I
OL
currents
may not exceed 60 mA, or the boost converter limits. If I
OL
limits are exceeded the corresponding V
OL
levels can not be guar-
anteed. Pins are not guaranteed to sink currents greater than those listed.
5. Pins PB1, PB2, PB4 and PB5 are high sink I/O pins.
6. Although each I/O port can under steady state (non-transient) conditions source more than indicated, the sum of all I
OH
cur-
rents may not exceed 60 mA, or the boost converter limits. If I
OH
limits are exceeded the corresponding V
OH
levels can not be
guaranteed. Pins are not guaranteed to source currents greater than those listed.
7. See “Boost Converter Characteristics” on page 159 for current consumption of entire device, including boost converter.
20.3 Speed Grades
Figure 20-1. Maximum Frequency vs. V
CC
(Boost Converter Disregarded).
R
PU
Pull-up Resistor, I/O Pin V
CC
= 5.5 V, input low 20 50 k
Ω
Pull-up Resistor, RESET Pin V
CC
= 5.5 V, input low 30 80 k
Ω
I
CC
Supply Current,
Active Mode,
Without Boost Converter
(7)
f = 1MHz, V
CC
= 2V 0.2 0.55 mA
f = 4MHz, V
CC
= 3V 1.3 2.5 mA
f = 8MHz, V
CC
= 5V 4 7 mA
Supply Current,
Idle Mode,
Without Boost Converter
(7)
f = 1MHz, V
CC
= 2V 0.04 0.15 mA
f = 4MHz, V
CC
= 3V 0.25 0.6 mA
f = 8MHz, V
CC
= 5V 1.0 2.0 mA
Supply Current,
Power-Down Mode,
Without Boost Converter
(7)
WDT enabled, V
CC
= 3V 4.5 10 µA
WDT disabled, V
CC
= 3V 0.35 2 µA
Table 20-1. DC Characteristics. T
A
= -40
°
C to 85
°
C (Continued)
Symbol Parameter Condition Min. Typ. Max. Units
8 MHz
4 MHz
1.8V 2.7V 5.5V
Safe Operating Area