Information

© 2005 Microchip Technology Inc. DS80239A-page 7
PIC18F2331/2431/4331/4431
6. Module: 28-Pin QFN Diagram
A 28-pin QFN package has been introduced for
the PIC18F2331 and PIC18F2431 devices. The
Device Data Sheet has been updated as follows:
•The Pin Diagram section (page 3) has been
updated to include the new 28-pin QFN
package.
FIGURE 1: 28-PIN QFN DIAGRAM
• The Packages information in Table 1-1 (page 9)
and Table B-1 (page 379) has been updated to
include a reference to the 28-pin QFN. The new
text is shown in bold.
TABLE 1:
28-Pin QFN
PIC18F2231
2
3
6
1
18
19
20
21
15
7
16
17
RC0/T1OSO/T1CKI
5
4
RB7/KBI3/PGD RB6/KBI2/PGC RB5/KBI1/PWM4/PGM
(1)
RB4/KBI0/PWM5
RB3/PWM3
RB2/PWM2
RB1/PWM1
RB0/PWM0
V
DD
VSS
RC7/RX/DT/SDO
RC6/TX/CK/SS
RC5/INT2/SCK/SCL
RC4/INT1/SDI/SDA
RA0/AN0 RA1/AN1
RA2/AN2/VREF-/CAP1/INDX
RA3/AN3/V
REF+/CAP2/QEA
RA4/AN4/CAP3/QEB
V
DD
VSS
OSC1/CLKI/RA7
OSC2/CLKO/RA6
RC1/T1OSI/CCP2/FLTA
RC2/CCP1/FLTB
RC3/T0CKI/T5CKI/INT0
10 11 12 13 14
8 9
22
23 24 25 26 27 28
PIC18F2431
MCLR/VPP/RE3
Note 1: Low-Voltage Programming must be enabled.
Features PIC18F2331 PIC18F2431 PIC18F4331 PIC18F4431
Packages 28-pin SDIP
28-pin SOIC
28-pin QFN
28-pin SDIP
28-pin SOIC
28-pin QFN
40-pin DIP
44-pin TQFP
44-pin QFN
40-pin DIP
44-pin TQFP
44-pin QFN