PIC16F877T-20/L Microchip Technology, PIC16F877T-20/L Datasheet - Page 624

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

Specifications of PIC16F877T-20/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: 0°C ~ 70°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
31.3.2.2
DS31031A-page 31-12
Crystal Oscillator Measurements
On the Data Collection System, there are several crystals. For this test a crystal is multiplexed
into the device circuit, and the crystal’s capacitance values can be varied. The capacitance and
voltage values are varied to determine the best characteristics (current, oscillator waveform, and
oscillator start-up), and then the currents are measured over voltage. The next crystal oscillator
is then switched in and the procedure is repeated.
Figure 31-16: Example Typical I
Figure 31-17: Example Maximum I
120
100
140
120
100
80
60
40
20
0
80
60
40
20
0
0
0
6.0V
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
6.0V
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
DD
50
50
DD
vs. Frequency (LP Mode, 25 C)
vs. Frequency (LP Mode, 85 C to -40 C)
Frequency (kHz)
Frequency (kHz)
100
100
1997 Microchip Technology Inc.
150
150
200
200