PIC16F877T-20I/L Microchip Technology, PIC16F877T-20I/L Datasheet - Page 38

• Manufacturer Part Number: PIC16F877T-20I/L
• Description: IC MCU FLASH 8KX14 EE 44PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877T-20I/L

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 14KB (8K x 14)
• 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: -40°C ~ 85°C
• Package / Case: 44-PLCC
• For Use With: DVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
2.3.3
DS31002A-page 2-8
Tuning the Oscillator Circuit
Since Microchip devices have wide operating ranges (frequency, voltage, and temperature;
depending on the part and version ordered) and external components (crystals, capacitors,...),
of varying quality and manufacture; validation of operation needs to be performed to ensure that
the component selection will comply with the requirements of the application.
There are many factors that go into the selection and arrangement of these external components.
These factors include:
• amplifier gain
• desired frequency
• resonant frequency(s) of the crystal
• temperature of operation
• supply voltage range
• start-up time
• stability
• crystal life
• power consumption
• simplification of the circuit
• use of standard components
• combination which results in fewest components
1997 Microchip Technology Inc.