Micrel, Inc.
MICRF112
December 2011
18
M9999-120911
(408) 944-0800
Functional Description of TX112-1
Evaluation Board.
Figure 7 shows the TX112-1 Demo Board PCB. Figure
8 is a detailed schematic of the TX112-1. Note that
components labeled as NP are to obtain different
configurations including FSK Mode of operation. Table 2
describes each header pin connector used in the demo
board.
Pin
Function Name
Functional Description
J1-1
VDD
1.8V to 3.6V
J1-2
Ground
VSS
J1-3
ASK INPUT
Modulating Data Input, ASK or FSK
J2-1
REF-OSC
External Reference Input
J2-2
GROUND
VSS
J2-3
ENABLE
Enable Input, Active High
TX112-1-433.92 ASK Bill of Materials
Item Quantity
Ref
Part
PCB
Footprint
Mfg P/N
Manufacturer
1
1
C1
10礔
0805
GRM21BR60J106KE01L
muRata
2
1
C2
100pF
0603
GRM1885C1H101JA01D
muRata
3
1
C5
10pF
0603
GRM1885C1H100JA01D
muRata
4
3
R1,R4,R6
(np)
5
5
C6,C8,C11,C12,C15
(np)
6
1
C7
4.7pF
0603
GRM1885C1H4R7JA01D
muRata
7
1
C10
0.1礔
0603
GRM188F51H104ZA01D
muRata
8
2
C13,C14
18pF
0603
GRM1885C1H180JA01D
muRata
9
2
J1,J2
CON3
TSHR-114-S-02-A-GT
10
1
L1
680nH
0805
0805CS-680XJB
Coilcraft
11
1
L4
82nH
0603
0603CS-082NXJB
Coilcraft
12
1
L5
ANTENNA
ANTENNA LOOP, Part of
PCB
13
1
R2
100k&
0603
CRCW0603100KFKEA
Vishay
14
6
R3,R5,R7
R8,JPR1,JPR2
0&
0603
CRC06030000Z0EA
Vishay
13
1
U1
MICRF112YMM10
MICRF112YM
Micrel
14
1
Y1
13.560MHZ XTAL
SA-13.5600-F-10-C-3-3
HIB
Table 2