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PIC18F86J72/87J72
Data Sheet Clarifications
The following typographic corrections and clarifications
are to be noted for the latest version of the device data
sheet (DS39979 A ).
It is recommended that the trace length not exceed
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
Note:
Corrections are shown in bold . Where
possible, the original bold text formatting
has been removed for clarity.
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
1. Module: Guidelines for Getting Started
with PIC18FJ Microcontrollers
Section 2.4 Voltage Regulator Pins (ENVREG and
voltage regulator permanently disabled; they must
always be provided with a supply voltage on the
V DDCORE pin.
V CAP /V DDCORE ) has been replaced with a new and
more detailed section. The entire text follows:
FIGURE 2-3
FREQUENCY vs. ESR
PERFORMANCE FOR
2.4
Voltage Regulator Pins (ENVREG
and V CAP /V DDCORE )
10
SUGGESTED V CAP
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 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 (< 5 ? )
1
0.1
0.01
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
0.001
0.01
0.1
1 10 100
Frequency (MHz)
1000 10,000
use a capacitor of 10 μF connected to ground. The type
can be ceramic or tantalum. Suitable examples of
capacitors are shown in Table 2-1 . Capacitors with
equivalent specifications can be used.
Designers may use Figure 2-3 to evaluate ESR
equivalence of candidate devices.
TABLE 2-1
SUITABLE CAPACITOR EQUIVALENTS
Note:
Typical data measurement at 25°C, 0V DC bias.
Make
TDK
TDK
Panasonic
Panasonic
Murata
Murata
Part #
C3216X7R1C106K
C3216X5R1C106K
ECJ-3YX1C106K
ECJ-4YB1C106K
GRM32DR71C106KA01L
GRM31CR61C106KC31L
Nominal
Capacitance
10 μF
10 μF
10 μF
10 μF
10 μF
10 μF
Base Tolerance
±10%
±10%
±10%
±10%
±10%
±10%
Rated Voltage
16V
16V
16V
16V
16V
16V
Temp. Range
-55 to +125oC
-55 to +85oC
-55 to +125oC
-55 to +85oC
-55 to +125oC
-55 to +85oC
? 2011 Microchip Technology Inc.
DS80508C-page 5
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