CMOSTEK CMT2157A Series Manual

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 CMT2157A 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
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
CMT2157A is part of the CMOSTEK NextGenRF
together with CMT225x series receivers, they enable ultra
low cost, low power consumption RF links.
Copyright © By CMOSTEK
and receiver during the
TM
family,
Rev 0.8 | Page 1/31
CMT2157A
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
CMT2157A-ESR 868.35 MHz
CMT2157A-ESB 868.35 MHz
More Ordering Info: See Page 26
SOP14
1
LED
2
VDD
3
GND
4
RFO
5
K7
6
K6
7
K5
CMT2157A
CMT2157A
Package MOQ
T&R 2,500 pcs
Tube 1,000 pcs
14
XTAL
13
CLK
12
DATA
11
K1
10
K2
9
K3
8
K4
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