PIC16F628AT-E/SS Microchip Technology, PIC16F628AT-E/SS Datasheet - Page 108

• Manufacturer Part Number: PIC16F628AT-E/SS
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SSOP,20PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F628AT-E/SS

• Rohs Compliant: YES
• 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
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• 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 ~ 125°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: I3DBF648 - BOARD DAUGHTER ICEPIC3AC162053 - HEADER INTERFACE ICD,ICD2 18DIP
• 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