The STS1TX is a very low-power RF transmitter intended for RF wireless applications in the sub-1 GHz band. It is designed to operate both in the license-free ISM and SRD frequency bands at 169, 315, 433, 868, and 915 MHz, but can also be programmed to operate at other frequencies in the 300-348, 387-470, and 779-956 MHz bands. The air data rate is programmable from 1 to 500 kbps, and the STS1TX can be used in systems with channel spacing of 12.5/25 kHz, complying with the EN 300 220 standard. It uses very few discrete external components and integrates a configurable baseband modem, which supports data management and modulation. The data management handles the data in the proprietary fully-programmable packet format, and also allows the M-Bus standard compliance format (all performance classes).

An AES 128-bit encryption co-processor is available for secure data transfer. The STS1TX supports different modulation schemes: 2-FSK, GFSK, OOK, ASK, and MSK. Transmitted data bytes are buffered in FIFO (TX FIFO), accessible via the SPI interface for host processing.

sts1tx是一个非常低功耗射频发射机用于1 GHz频段的RF无线应用。它被设计为工作在无需许可的ISM和SRD频带在169，315，433，868，和915兆赫，但也可以被编程为在其他频率的300-348，387-470操作，和779-956兆赫波段。空气数据率可从1到500 kbps，而sts1tx可用于与12.5/25千赫信道间隔的系统，符合EN 300标准220。它使用非常少的外部元件和集成了一个可配置的基带调制解调器，它支持数据管理和调制。数据管理处理私有数据的完全可编程的数据包格式，并允许M-Bus标准格式（所有性能等级）。

AES 128位加密协处理器可用于安全的数据传输。sts1tx支持不同的调制方案的性能，GFSK，OOK，问，和MSK。发送的数据字节缓冲FIFO（TX FIFO），可通过SPI接口的主机处理。

Key Features

• Frequency bands: 150-174 MHz, 300-348 MHz, 387-470 MHz, 779-956 MHz

• Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOK, and ASK

• Air data rate from 1 to 500 kbps

• Very low power consumption (21 mA TX at +11 dBm)

• Programmable channel spacing (12.5 kHz min.)

• Programmable output power up to +16 dBm

• Fast startup and frequency synthesizer settling time (6 μs)

• Integrated temperature sensor

• Battery indicator and low battery detector

• TX FIFO buffer (96 bytes each)

• Configurability via SPI interface

• AES 128-bit encryption co-processor

• Fully integrated ultra low power RC oscillator

• Wakeup on internal timer and on external event

• Flexible packet length with dynamic payload length

• Automatic CRC handling

• FEC with interleaving

• Whitening of data

• Wireless M-BUS, EN 300 220, FCC CFR47 15 (15.205, 15.209, 15.231, 15.247, 15.249), and ARIB STD T-67, T93, T-108 compliant

• QFN20 4x4 mm RoHS package

• Operating temperature range from -40 °C to 85 °C

主要特点

频段：150-174兆赫，300-348兆赫，387-470兆赫，779-956兆赫

调制方案：性能，GFSK，MSK，GMSK，OOK，问

从1到500 kbps的数据率的空气

非常低的功耗（21 mA的TX在11 dBm）

可编程通道间距（12.5千赫分钟）

可编程的输出功率为16 dBm

快速启动和频率合成器的稳定时间（6μs

集成温度传感器

电池指示和低电量检测器

Tx FIFO缓冲区（96字节）

通过SPI接口配置

AES 128位加密协处理器

完全集成的超低功率钢筋混凝土振荡器

内部定时器和外部事件唤醒

具有动态负载长度的柔性数据包长度

自动结直肠癌

FEC和交织

数据的白化

无线M-Bus，EN 300，220，15（15.205，FCC cfr47 15.209，15.231，15.247，15.249），和ARIB性病t-67，T93，t-108兼容

qfn20 4x4毫米RoHS封装

工作温度范围从- 40°到85°