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PDF CMT2157AW Data sheet ( Hoja de datos )
| Número de pieza | CMT2157AW | |
| Descripción | 240 - 960MHz (G)FSK/OOK Stand-Alone Transmitter | |
| Fabricantes | CMOSTEK | |
| Logotipo |  |
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CMT2157AW
CMT2157AW
240 – 960 MHz (G)FSK/OOK Stand-Alone Transmitter with Encoder
Features
Embedded EEPROM
Very Easy Development with RFPDK
All Features Programmable
Frequency Range: 240 to 960 MHz
FSK, GFSK and OOK Modulation
Symbol Rate:
0.5 to 100 ksps (FSK/GFSK)
0.5 to 40 ksps (OOK)
Deviation: 1.0 to 200 kHz
Output Power: -10 to +13 dBm
Sleep Current: < 20 nA
Stand-Alone, No External MCU Control Required
Embedded 1920, 1527 and 2262 Data Encoder
Up to 7 Configurable Data Pins for Push Buttons
LED Indicator for Low Battery Detection and Transmission
Sync ID Auto-Study with CMOSTEK Receiver
FCC / ETSI Compliant
RoHS Compliant
14-pin SOP Package
Descriptions
The CMT2157AW is a true single-chip, highly flexible, high
performance, (G)FSK/OOK RF transmitter with embedded
data encoder ideally for 240 to 960 MHz wireless
applications. The device integrates a data encoder that is
not only compatible with the most common used encoding
format of 1527 and 2262, but also a more efficient, flexible
and powerful format of 1920 designed by CMOSTEK. Up
to 7 configurable push buttons are supported in multiple
button modes. When pairing the device to CMOSTEK
receiver, the synchronization ID can be programmed into
both of the transmitter and receiver during the
manufacturing phase, or studied by the receiver from the
transmitter remotely by end customers. An embedded
EEPROM allows the RF and encoder parameters to be
programmed into the chip using the CMOSTEK USB
Programmer and the RFPDK. Alternatively, in stock
product of 868.35 MHz is available for immediate demands
without the need of EEPROM programming. The
CMT2157AW is part of the CMOSTEK NextGenRFTM
family, together with CMT225x series receivers, they
enable ultra low cost, low power consumption RF links.
Applications
Low-Cost Consumer Electronics Applications
Home and Building Automation
Remote Fan Controllers
Infrared Transmitter Replacements
Industrial Monitoring and Controls
Remote Lighting Control
Wireless Alarm and Security Systems
Remote Keyless Entry (RKE)
Ordering Information
Part Number
Frequency Package MOQ
CMT2157AW-ESR 868.35 MHz
T&R
2,500 pcs
CMT2157AW-ESB 868.35 MHz
Tube
1,000 pcs
More Ordering Info: See Page 26
SOP14
LED
VDD
GND
RFO
K7
K6
K5
1
2
3
4
5
6
7
14 XTAL
13 CLK
12 DATA
11 K1
10 K2
9 K3
8 K4
CMT2157AW
Copyright © By CMOSTEK
Rev 0.8 | Page 1/31
www.hoperf.com
1 page  
CMT2157AW
1. Electrical Characteristics
VDD = 3.3 V, TOP = 25 ℃, FRF = 433.92 MHz, output power is +10 dBm terminated in a matched 50 Ω impedance, unless
otherwise noted.
1.1 Recommended Operating Conditions
Table 2. Recommended Operation Conditions
Parameter
Operation Voltage Supply
Operation Temperature
Supply Voltage Slew Rate
Symbol
VDD
TOP
Conditions
Min
1.8
-40
1
Typ
Max
Unit
3.6 V
85 ℃
mV/us
1.2 Absolute Maximum Ratings
Table 3. Absolute Maximum Ratings[1]
Parameter
Symbol
Conditions
Min
Max
Unit
Supply Voltage
Interface Voltage
Junction Temperature
Storage Temperature
Soldering Temperature
ESD Rating
Latch-up Current
VDD
VIN
TJ
TSTG
TSDR
Lasts at least 30 seconds
Human Body Model (HBM)
@ 85 ℃
-0.3
-0.3
-40
-50
-2
-100
3.6
VDD + 0.3
125
150
255
2
100
V
V
℃
℃
℃
kV
mA
Note:
[1]. Stresses above those listed as “absolute maximum ratings” may cause permanent damage to the device. This is a stress
rating only and functional operation of the device under these conditions is not implied. Exposure to maximum rating
conditions for extended periods may affect device reliability.
Caution! ESD sensitive device. Precaution should be used when handling the device in order
to prevent permanent damage.
Rev 0.8 | Page 5/31
www.hoperf.com
5 Page 
CMT2157AW
4.2 FCC/ETSI Compliant Application Schematic
ANT
L3
C3
VDD
D1
L1
L2 C1
C0
SW7
C2 SW6
SW5
CMT2157AW
1
LED
2
VDD
3
GND
4
RFO
5
K7
6
K6
7
K5
14
XTAL
13
CLK
12
DATA
U1
11
K1
10
K2
9
K3
8
K4
X1
CLK
DATA
SW1
SW2
SW3
SW4
VDD
CLK
DATA
J1
1
2
3
4
Note: Connector J1 is for
EEPROM Programming
Figure 10. FCC/ETSI Compliant Application Schematic
Notes:
1. Connector J1 is a must for the CMT2157AW EEPROM access during development or manufacture phase.
2. The general layout guidelines are listed below. For more design details, please refer to “AN111 CMT215x Schematic and
PCB Layout Design Guideline”.
Use as much continuous ground plane metallization as possible.
Use as many grounding vias (especially near to the GND pins) as possible to minimize series parasitic inductance
between the ground pour and the GND pins.
Avoid using long and/or thin transmission lines to connect the components.
Avoid placing the nearby inductors in the same orientation to reduce the coupling between them.
Place C0 as close to the CMT2157AW as possible for better filtering.
3. The table below shows the BOM of 433.92/868.35 MHz FCC/ETSI Compliant Application. For the BOM of more
application, please refer to “AN111 CMT215x Schematic and PCB Layout Design Guideline”.
Table 8. BOM of 433.92/868.35 MHz FCC/ETSI Compliant Application
Designator
Descriptions
U1
X1
C0
C1
C2
C3
L1
L2
L3
D1
SW[7:0]
CMT2157AW, 240 – 960 MHz (G)FSK/OOK
stand-alone transmitter with encoder
±20 ppm, SMD32*25 mm crystal
±20%, 0402 X7R, 25 V
±5%, 0402 NP0, 50 V
±5%, 0402 NP0, 50 V
±5%, 0402 NP0, 50 V
±5%, 0603 multi-layer chip inductor
±5%, 0603 multi-layer chip inductor
±5%, 0603 multi-layer chip inductor
D0603, red LED
Push buttons
Value
433.92 MHz 868.35 MHz
-
26
0.1
68 68
15 10
15 6.8
180 100
36 5.6
18 6.8
--
--
Unit
-
MHz
uF
pF
pF
pF
nH
nH
nH
-
-
Manufacturer
CMOSTEK
EPSON
Murata GRM15
Murata GRM15
Murata GRM15
Murata GRM15
Murata LQG18
Murata LQG18
Murata LQG18
Rev 0.8 | Page 11/31
www.hoperf.com
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CMT2157AW.PDF ] | |
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