PIC16F628A-I/SO Microchip Technology, PIC16F628A-I/SO Datasheet - Page 108

• Manufacturer Part Number: PIC16F628A-I/SO
• Description: IC MCU FLASH 2KX14 EEPROM 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F628A-I/SO

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 18-SOIC (7.5mm Width)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Eeprom Size: 128 x 8
• Ram Size: 224 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 224 B
• Interface Type: SCI/USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT18SO-1 - SOCKET TRANSITION 18SOIC 300MILI3DBF648 - BOARD DAUGHTER ICEPIC3AC162053 - HEADER INTERFACE ICD,ICD2 18DIPAC164010 - MODULE SKT PROMATEII DIP/SOIC
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC16F627A/628A/648A
FIGURE 14-11:
FIGURE 14-12:
DS40044G-page 108
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 kΩ is recommended to make sure
that voltage drop across R does not violate
the device’s electrical specification.
R1 = 100Ω to 1 kΩ will limit any current
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
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
power-up slope is too slow. The
40k
DD
PIC16F627A/628A/648A
MCLR
V
powers down.
PIC16F627A/628A/648A
MCLR
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
Q1
x
40k
© 2009 Microchip Technology Inc.
R1 + R2
R1 + R2
R1
R1
PIC16F627A/628A/648A
MCLR
V
DD
= 0.7 V
= 0.7 V