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 2010 Microchip Technology Inc.
DS39933D-page 433
PIC18F87J90 FAMILY
APPENDIX A: REVISION HISTORY
Revision A (October 2008)
Original data sheet for PIC18F87J90 family devices.
Revision B (December 2008)
Changes to Section 28.2 “DC Characteristics:
Power-Down and Supply Current PIC18F87J90
Family (Industrial)”
 an
d removal of Section 27.5 “DC
Characteristics: RTCC Power-Down Current (I
PD
)”.
Revision C (February 2009)
Added register CONFIG3L to Section 25.0 “Special
Features of the CPU”
 a
nd made minor corrections.
Revision D (January 2010)
Added 60°C I
PD
 specification to Section 28.0 “Electri-
cal Characteristics”. Removed Preliminary condition
tag. Minor edits to text throughout the document.
APPENDIX B: MIGRATION FROM 
PIC18F85J90 TO 
PIC18F87J90
Devices in the PIC18F87J90 and PIC18F85J90 fami-
lies are almost similar in their functions and features.
Code can be migrated from the 18F85J90 to the
PIC18F87J90 without many changes. The differences
between the two device families are listed in Table B-1.
TABLE B-1:
NOTABLE DIFFERENCES BETWEEN PIC18F87J90 AND PIC18F85J90 FAMILIES 
Characteristic
PIC18F87J90 Family
18F85J90 Family
Max Operating Frequency
48 MHz
40 MHz
Max Program Memory
128 Kbytes
32 Kbytes
Data Memory
3,923 Bytes
2,048 Bytes
Program Memory Endurance
10,000 Write/Erase (minimum)
1,000 Write/Erase (minimum)
Single-Word Write for Flash
Yes
No
Oscillator Options
PLL can be used with INTOSC
PLL cannot be used with INTOSC
CTMU
Yes
No
RTCC
Yes
No
Timer1 Oscillator Options
Low-power oscillator option for 
Timer1
No
TICKI Clock
T1CKI can be used as a clock without 
enabling the Timer1 oscillator
No