AT89LP428 Atmel Corporation, AT89LP428 Datasheet - Page 128

• Manufacturer Part Number: AT89LP428
• Manufacturer: Atmel Corporation

Specifications of AT89LP428

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 25 MHz
• Cpu: 8051-1C
• Max I/o Pins: 30
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.75
• Eeprom (bytes): 512
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 3
• Isp: SPI/OCD
• Watchdog: Yes

24.3
24.3.1
128
Typical Characteristics
AT89LP428/828
Supply Current (Internal Oscillator)
The following charts show typical behavior. These figures are not tested during manufacturing.
All current consumption measurements are performed with all I/O pins configured as quasi-bidi-
rectional (with internal pull-ups). A square wave generator with rail-to-rail output is used as an
external clock source for consumption versus frequency measurements.
Figure 24-1. Active Supply Current vs. Vcc (8 MHz Internal Oscillator)
Figure 24-2. Idle Supply Current vs. Vcc (8 MHz Internal Oscillator)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
9
8
7
6
5
4
3
2
2.0
2.0
2.5
2.5
3.0
3.0
3.5
3.5
Vcc (V)
Vcc (V)
4.0
4.0
4.5
4.5
5.0
5.0
5.5
5.5
3654A–MICRO–8/09
85C
-40C
25C
85C
-40C
25C