PIC12C671-04I/P Microchip Technology Inc., PIC12C671-04I/P Datasheet - Page 61

• Manufacturer Part Number: PIC12C671-04I/P
• Description: 8 PIN, 1.75 KB OTP, 128 RAM, 6 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC12C671-04I/P

• A/d Inputs: 4-Channel, 8-Bit
• Cpu Speed: 2.5 MIPS
• Eeprom Memory: 0 Bytes
• Input Output: 5
• Memory Type: OTP
• Number Of Bits: 8
• Package Type: 8-pin PDIP
• Programmable Memory: 1.75K Bytes
• Ram Size: 128 Bytes
• Speed: 4 MHz
• Timers: 1-8-bit
• Voltage, Range: 2.5-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

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