Information

© 2005 Microchip Technology Inc. DS80245A-page 7
PIC18FXX2
3. Module: Packaging (Pinout and Product
Identification)
PIC18F442 and PICF452 devices are now offered
in 44-pin, near chip scale micro lead frame pack-
ages (commonly known as “QFN”). This packag-
ing type has been added to the product line since
the latest revision of the Device Data Sheet.
The addition of this option requires the following
additions to the Device Data Sheet (DS39564B).
The referenced figures and tables follow this text.
1. The “Pin Diagrams” on pages 2-3 of the Data
Sheet are amended with the addition of the
44-pin QFN pinout, shown in Figure 1.
2. Table 1-3 of Section 1.0 “Device Overview”
is replaced with an updated version which
adds a column for QFN pin assignments. A row
is also added for previously unlisted NC pins.
All new information is indicated in bold.
3. Section 24.1 “Package Marking Information”
is amended to include a marking template and
example for 44-pin QFN devices. These are
shown in Figure 2.
4. Section 24.2 “Package Details” is amended
to include the mechanical drawing of the 44-pin
QFN package, shown in Figure 3.
5. In the “PIC18FXX2 Product Identification
System” (page 329), the “Package” options
are amended to include the new line item:
ML = QFN
6. For the sake of completeness, it is also noted
that the package designation “MLF” is now
replaced by “QFN” in all occurrences through-
out the Device Data Sheet. “MLF” should be
considered an obsoleted term.
FIGURE 1: PINOUT DIAGRAM FOR PIC18F442/452, 44-PIN QFN PACKAGE
FIGURE 2: PACKAGE MARKING TEMPLATE FOR PIC18F442/452, 44-PIN QFN
10
11
2
3
4
5
6
1
18 19 20 21
22
12 13 14 15
38
8
7
44 43 42 41 40 39
16 17
29
30
31
32
33
23
24
25
26
27
28
36 34 35
9
PIC18F442
37
RA3/AN3/VREF+
RA2/AN2/V
REF-
RA1/AN1 RA0/AN0 MCLR
/VPP
RB3/CCP2* RB7/PGD RB6/PGC RB5/PGM RB4 NC
RC6/TX/CK RC5/SDO RC4/SDI/SDA RD3/PSP3 RD2/PSP2 RD1/PSP1 RD0/PSP0 RC3/SCK/SCL RC2/CCP1 RC1/T1OSI/CCP2* RC0/T1OSO/T1CKI
OSC2/CLKO/RA6
OSC1/CLKI
V
SS
VSS
VDD
VDD
RE2/CS/AN7
RE1/WR
/AN6
RE0/RD
/AN5
RA5/AN4/SS
/LVDIN
RA4/T0CKI
RC7/RX/DT
RD4/PSP4
RD5/PSP5
RD6/PSP6
RD7/PSP7
V
SS
VDD
VDD
RB0/INT0
RB1/INT1
RB2/INT2
QFN
PIC18F452
*RB3 is the alternate pin for the CCP2 pin multiplexing.
XXXXXXXXXX
44-Lead QFN
XXXXXXXXXX
XXXXXXXXXX
YYWWNNN
PIC18F442
Example
-I/ML
0510017