PIC16F877-20/P Microchip Technology, PIC16F877-20/P Datasheet - Page 36

• 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

PICmicro MID-RANGE MCU FAMILY
2.3.2
DS31002A-page 2-6
Component Selection
Figure 2-1
the feedback resistor, R
temperature, and process variations. A series resistor, Rs, may be required if an AT strip cut crys-
tal is used. Be sure to include the device’s operating voltage and the device’s manufacturing pro-
cess when determining resistor requirements. As you can see in
the device’s internal logic is device dependent. See the applicable data sheet for device specifics.
The typical values of capacitors (C1, C2) are given in
sheet will give the specific values that Microchip tested.
Table 2-3:
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
16.0 MHz
20.0 MHz
Note 1: Recommended values of C1 and C2 are identical to the ranges tested above.
2: All resonators tested required external capacitors.
Mode
HS
Higher capacitance increases the stability of the oscillator but also increases the
start-up time. These values are for design guidance only. Since each resonator has
its own characteristics, the user should consult the resonator manufacturer for appro-
priate values of external component or verify oscillator performance.
XT
is a diagram of the devices crystal or ceramic resonator circuitry. The resistance for
Typical Capacitor Selection for Ceramic Resonators
F
Panasonic EFO-A455K04B
Murata Erie CSA2.00MG
Murata Erie CSA4.00MG
Murata Erie CSA8.00MT
Murata Erie CSA16.00MX
TBD
, is typically within the 2 to 10 M range. This varies with device voltage,
Frequency
16.0 MHz
20.0 MHz
455 kHz
2.0 MHz
4.0 MHz
8.0 MHz
Resonators used:
Ranges tested:
Table 2-3
and
Figure
Table
1997 Microchip Technology Inc.
22 - 100 pF
15 - 68 pF
15 - 68 pF
10 - 68 pF
10 - 22 pF
C1 / C2
TBD
2-4. Each device’s data
2-1, the connection to
(1)
TBD
0.3%
0.5%
0.5%
0.5%
0.5%