CMOSTEK CMT2157AW - Typical Application Schematics; CMT2157 AW Schematic Diagram; Bill of Materials (BOM)

CMT2157AW
Rev 0.8 | Page 2/31
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Typical Application
ANT
VDD
U1
C2
L2
C1
L1
C0
SW7
SW6
SW5
LED
VDD
GND
RFO
K7
K6
K5
1
2
3
4
5
6
7
D1
8
9
10
11
12
13
14
SW4
SW3
SW2
SW1
XTAL
CLK
DATA
K1
K2
K3
K4
X1
CLK
DATA
CLK
DATA
J1
1
2
3
4
VDD
CMT2157AW
Note: Connector J1 is for
EEPROM Programming
Figure 1. CMT2157AW Typical Application Schematic
Table 1. BOM of 433.92/868.35 MHz Typical Application
Designator Descriptions
Value Unit Manufacturer
433.92 MHz 868.35 MHz
U1
CMT2157AW, 240 – 960 MHz (G)FSK/OOK
stand-alone transmitter with encoder
- - CMOSTEK
X1 ±20 ppm, SMD32*25 mm crystal 26 MHz EPSON
C0 ±20%, 0402 X7R, 25 V 0.1 uF Murata GRM15
C1 ±5%, 0402 NP0, 50 V 82 82 pF Murata GRM15
C2 ±5%, 0402 NP0, 50 V 9.1 3.9 pF Murata GRM15
L1 ±5%, 0603 multi-layer chip inductor 180 100 nH Murata LQG18
L2 ±5%, 0603 multi-layer chip inductor 22 5.1 nH Murata LQG18
D1 D0603, red LED - - -
SW[7:1] Push buttons - - -