PIC16F877-20/P Microchip Technology, PIC16F877-20/P Datasheet - Page 627

• Manufacturer Part Number: PIC16F877-20/P
• Description: IC MCU FLASH 8KX14 EE 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877-20/P

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Controller Family/series: PIC16F
• No. Of I/o's: 33
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 368Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

31.3.3
1997 Microchip Technology Inc.
RC Oscillator Frequency
These tables show the effects of the RC oscillator frequency as the device voltage varies. In
these measurements a capacitor and resistor value are selected and then the frequency of the
RC is measured as the device voltage varies. The table shows the typical frequency for a R and
C value at 5V, as well as the variation from this frequency that can be expected due to device
processing.
Figure 31-22: Example Typical RC Oscillator Frequency vs. V
Figure 31-23: Example Typical RC Oscillator Frequency vs. V
Section 31. Device Characteristics
Shaded area is beyond recommended range.
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5
2.5
3.0
3.0
3.5
3.5
C
C
EXT
EXT
4.0
V
= 100 pF, T = 25 C
= 22 pF, T = 25 C
4.0
V
DD
DD
(Volts)
(Volts)
4.5
4.5
5.0
5.0
DD
DD
R = 10k
R = 100k
R = 5k
R = 100k
R = 5k
R = 10k
R = 3.3k
5.5
5.5
DS31031A-page 31-15
6.0
6.0
31