Microchip Technology ARD00330 Data Sheet
2011 Microchip Technology Inc.
DS80508C-page 5
PIC18F86J72/87J72
Data Sheet Clarifications
The following typographic corrections and clarifications
are to be noted for the latest version of the device data
sheet (DS39979A).
are to be noted for the latest version of the device data
sheet (DS39979A).
1.
Module: Guidelines for Getting Started
with PIC18FJ Microcontrollers
Section 2.4 Voltage Regulator Pins (ENVREG and
V
V
CAP
/V
DDCORE
)
has been replaced with a new and
more detailed section. The entire text follows:
2.4
Voltage Regulator Pins (ENVREG
and V
and V
CAP
/V
DDCORE
)
The on-chip voltage regulator enable pin, ENVREG,
must always be connected directly to either a supply
voltage or to ground. Tying ENVREG to V
must always be connected directly to either a supply
voltage or to ground. Tying ENVREG to V
DD
enables the
regulator, while tying it to ground disables the regulator.
Refer to Section 26.3 “On-Chip Voltage Regulator”
for details on connecting and using the on-chip regulator.
When the regulator is enabled, a low-ESR (< 5Ω)
capacitor is required on the V
Refer to Section 26.3 “On-Chip Voltage Regulator”
for details on connecting and using the on-chip regulator.
When the regulator is enabled, a low-ESR (< 5Ω)
capacitor is required on the V
CAP
/V
DDCORE
pin to
stabilize the voltage regulator output voltage. The V
CAP
/
V
DDCORE
pin must not be connected to V
DD
and must
use a capacitor of 10 µF connected to ground. The type
can be ceramic or tantalum. Suitable examples of
capacitors are shown in
can be ceramic or tantalum. Suitable examples of
capacitors are shown in
. Capacitors with
equivalent specifications can be used.
Designers may use
Designers may use
to evaluate ESR
equivalence of candidate devices.
It is recommended that the trace length not exceed
0.25 inch (6 mm). Refer to Section 29.0 “Electrical
Characteristics”
0.25 inch (6 mm). Refer to Section 29.0 “Electrical
Characteristics”
for additional information.
When the regulator is disabled, the V
CAP
/V
DDCORE
pin
must be tied to a voltage supply at the V
DDCORE
level.
Refer to Section 29.0 “Electrical Characteristics” for
information on V
information on V
DD
and V
DDCORE
.
Note that the “LF” versions of some low pin count
PIC18FJ parts (e.g., the PIC18LF45J10) do not have
the ENVREG pin. These devices are provided with the
voltage regulator permanently disabled; they must
always be provided with a supply voltage on the
V
PIC18FJ parts (e.g., the PIC18LF45J10) do not have
the ENVREG pin. These devices are provided with the
voltage regulator permanently disabled; they must
always be provided with a supply voltage on the
V
DDCORE
pin.
FIGURE 2-3
FREQUENCY vs. ESR
PERFORMANCE FOR
SUGGESTED V
PERFORMANCE FOR
SUGGESTED V
CAP
Note:
Corrections are shown in bold. Where
possible, the original bold text formatting
has been removed for clarity.
possible, the original bold text formatting
has been removed for clarity.
10
1
0.1
0.01
0.001
0.01
0.1
1
10
100
1000 10,000
Frequency (MHz)
ES
R (
)
Note:
Typical data measurement at 25°C, 0V DC bias.
TABLE 2-1
SUITABLE CAPACITOR EQUIVALENTS
Make
Part #
Nominal
Capacitance
Base Tolerance
Rated Voltage
Temp. Range
TDK
C3216X7R1C106K
10 µF
±10%
16V
-55 to +125ºC
TDK
C3216X5R1C106K
10 µF
±10%
16V
-55 to +85ºC
Panasonic
ECJ-3YX1C106K
10 µF
±10%
16V
-55 to +125ºC
Panasonic
ECJ-4YB1C106K
10 µF
±10%
16V
-55 to +85ºC
Murata
GRM32DR71C106KA01L
10 µF
±10%
16V
-55 to +125ºC
Murata
GRM31CR61C106KC31L
10 µF
±10%
16V
-55 to +85ºC