PIC16F648A-I/ML Microchip Technology, PIC16F648A-I/ML Datasheet - Page 108

• Manufacturer Part Number: PIC16F648A-I/ML
• Description: IC MCU FLASH 4KX14 EEPROM 28QFN
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F648A-I/ML

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Oscillator Type: Internal
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Controller Family/series: PIC16F
• No. Of I/o's: 16
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 256Byte
• Cpu Speed: 20MHz
• No.: RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164324 - MODULE SKT FOR MPLAB 8DFN/16QFNXLT28QFN3 - SOCKET TRAN ICE 18DIP/28QFNI3DBF648 - BOARD DAUGHTER ICEPIC3AC164033 - ADAPTER 28QFN TO 18DIPDV007003 - PROGRAMMER UNIVERSAL PROMATE II
• Data Converters: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC16F627A/628A/648A
FIGURE 14-11:
FIGURE 14-12:
DS40044D-page 106
V
Note 1: This circuit will activate Reset when V
DD
Note 1:
33k
V
DD
2: Internal Brown-out Reset circuitry should
2:
3:
D
goes below (Vz + 0.7V) where Vz = Zener
voltage.
be disabled when using this circuit.
External Power-on Reset circuit is required
only if V
diode D helps discharge the capacitor
quickly when V
R < 40 k
that voltage drop across R does not violate
the device’s electrical specification.
R1 = 100
flowing into MCLR from external capacitor
C in the event of MCLR/V
down due to Electrostatic Discharge (ESD)
or Electrical Overstress (EOS).
10k
V
DD
R
DD
C
R1
EXTERNAL POWER-ON
RESET CIRCUIT (FOR
SLOW V
is recommended to make sure
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
40k
power-up slope is too slow. The
to 1 k
DD
PIC16F627A/628A/648A
MCLR
powers down.
V
PIC16F627A/628A/648A
MCLR
will limit any current
DD
DD
PP
POWER-UP)
pin break-
DD
FIGURE 14-13:
V
Note 1: This brown-out circuit is less expensive,
DD
R1
R2
2: Internal Brown-out Reset should be
3: Resistors should be adjusted for the
albeit less accurate. Transistor Q1 turns off
when V
disabled when using this circuit.
characteristics of the transistor.
x
DD
V
DD
is below a certain level such that:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 2
x
Q1
40k
© 2005 Microchip Technology Inc.
R1 + R2
R1 + R2
R1
R1
PIC16F627A/628A/648A
MCLR
V
DD
= 0.7 V
= 0.7 V