PIC12C671/JW Microchip Technology, PIC12C671/JW Datasheet - Page 61

• Manufacturer Part Number: PIC12C671/JW
• Description: IC MCU EPROM 1KX14 A/D 8CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 12Cr

Specifications of PIC12C671/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 10MHz
• Peripherals: POR, WDT
• Number Of I /o: 5
• Program Memory Size: 1.75KB (1K x 14)
• Program Memory Type: EPROM, UV
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-CDIP (0.300", 7.62mm) Window
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Connectivity: -

FIGURE 9-10: EXTERNAL POWER-ON
Note 1: External Power-on Reset circuit is required only
1999 Microchip Technology Inc.
2: R < 40 k
3: R1 = 100
if V
helps discharge the capacitor quickly when V
powers down.
voltage drop across R does not violate the
device’s electrical specification.
into MCLR from external capacitor C, in the
event of MCLR/V
Electrostatic Discharge (ESD) or Electrical
Overstress (EOS).
D
DD
V
power-up slope is too slow. The diode D
DD
RESET CIRCUIT (FOR SLOW
V
R
DD
C
is recommended to make sure that
to 1 k
POWER-UP)
PP
R1
will limit any current flowing
pin breakdown due to
MCLR
PIC12C67X
DD
FIGURE 9-11: EXTERNAL BROWN-OUT
FIGURE 9-12: EXTERNAL BROWN-OUT
Note 1: This circuit will activate reset when V
Note 1: This brown-out circuit is less expensive,
V
V
2: Resistors should be adjusted for the character-
DD
DD
2: Resistors should be adjusted for the charac-
below (Vz + 0.7V), where Vz = Zener voltage.
istics of the transistor.
R1
R2
33k
albeit less accurate. Transistor Q1 turns off
when V
teristics of the transistor.
V
DD
PROTECTION CIRCUIT 1
PROTECTION CIRCUIT 2
DD
•
10k
is below a certain level such that:
R1 + R2
PIC12C67X
R1
Q1
4.3k
4.3k
= 0.7V
DS30561B-page 61
PIC12C67X
PIC12C67X
V
MCLR
V
MCLR
DD
DD
DD
goes