Last Updated on : 2022-08-03 06:18:55download
ZT2S is a Zigbee module that Tuya has developed. It consists of a highly integrated wireless RF chip (Z2) and some peripherals. ZT2S also contains a low-power 32-bit CPU, 1024-KB ﬂash memory, 64-KB RAM, and rich peripherals.
Based on ZT2S, you can develop Zigbee products as required.
ZT2S has 2 lines of pins, 11 pins in total, with a spacing of 2 mm.
The dimensions of ZT2S are: 14.99±0.35 mm (W)×17.90±0.35 mm (L) ×2.80±0.15 mm (H)
The thickness of the PCB is 0.8±0.1 mm.
|1||VCC||P||Power supply pin (Typical value: 3.3V)|
|2||C2||I/O||Common I/O interface, which can be used as PWM output of the LED drive and corresponds to TL_C2 of the IC (Pin 22)|
|3||GND||P||Power supply reference ground|
|4||C3||I/O||Common I/O interface, which can be used as PWM output of the LED drive and corresponds to TL_C3 (Pin 23|
|5||RX||I/O||Uart_RXD, which corresponds to B7 (Pin 17) on the internal IC|
|6||D2||I/O||Common I/O interface, which can be used as PWM output of the LED drive and corresponds to TL_D2 of the IC (Pin 31)|
|7||TX||I/O||Uart_TXD, which corresponds to B1 (Pin 6) on the internal IC|
|8||C4||I/O||ADC pin, which corresponds to TL_C4 (Pin 24) on the internal IC|
|9||B4||I/O||Common I/O interface, which can be used as PWM output of the LED drive and corresponds to TL_B4 of the IC (Pin 14)|
|10||RST||I||Reset pin (low active), correspond to RESETB (Pin 25) on the internal IC|
|11||B5||I/O||Common I/O interface, which can be used as PWM output of the LED drive and corresponds to TL_B5 of the IC (Pin15)|
|12||SWS||I/O||Burning pin, which corresponds to SWS (Pin 5) on the internal IC|
- P indicates a power supply pin and I/O indicates an input/output pin.
- If you have any special requirements on the light colour controlled by the PWM output, please contact the Tuya business personnel.
|Parameter||Description||Minimum value||Maximum value||Unit|
|ESD voltage (human body model)||TAMB-25℃||-||2||KV|
|ESD voltage (machine model)||TAMB-25℃||-||0.5||KV|
|Parameter||Description||Minimum value||Typical value||Maximum value||Unit|
|VIL||Voltage input low||-||-||VDD*0.3||V|
|VIH||Voltage input high||VDD*0.7||-||-||V|
|VOL||Voltage output low||-||-||VDD*0.2||V|
|VOH||Voltage output high||VDD*0.8||-||-||V|
|Operating status||Mode||Rate||Transmit power/receive||Average value||Peak value (Typical value)||Unit|
|Transmit||-||250 Kbps||+0 dBm||4.7||22.91||mA|
|Transmit||-||250 Kbps||+10 dBm||9.25||38.78||mA|
|Receive||-||250 Kbps||Constantly receive||7.35||7.61||mA|
|Operating mode||Operating status, Ta = 25°C||Average value||Maximum value (Typical value)||Unit|
|Fast pairing||The module is in the fast network pairing state||9.15||9.49||mA|
|Connected||The module is connected to the network and in a running state.||8.95||9.15||mA|
|Deep sleep||Deep sleep mode, reserve 32-KB SRAM||2.8||-||uA|
|Operating frequency||2.405 to 2.480 GHz|
|Zigbee standard||IEEE 802.15.4|
|Data transmission rate||250 Kbps|
|Antenna type||PCB antenna with a gain of 2 dBi|
|Parameter||Minimum value||Typical value||Maximum value||Unit|
|Maximum output power (250Kbps)||-||10||-||dBm|
|Minimum output power (250Kbps)||-||-25||1||dBm|
|Output power adjustment stepping||-||0.5||1||dBm|
|Output spectrum adjacent channel suppression||-||-31||-||dBc|
|Parameter||Minimum value||Typical value||Maximum value||Unit|
|PER<8%, RX sensitivity (250 Kbps)||-102||-101||-99||dBm|
The Z2 chip has requirements on the power-on sequence. During the power-on process, the system starts when the RST pin reaches 1.62V. At this time, the VCC needs to reach more than 1.8V within 10ms. Because the RST pin has the RC link, the VCC of the bare module is much more than 1.8V when the RST reaches 1.62V.
In some cases that the large capacitance in the power driver connected to the Z2 chip module charges or discharges, if the module voltage is not fully discharged below 0.6V, the module will probably crash when it is restarted. It is required that the power supply pin VCC_3.3V of the module needs to be connected with a dummy load of 1K to release power quickly. You can refer to the following figure which shows parts of power-driven links.
As the voltage backflow occurs when interfaces of the module are connected to others, you can pull down the CEN or RST pin, to reduce the power consumption when the module doesn’t work.
As shown above, the MCU controls the CEN or RST pin through the GPIO interface, so as to power on or off the module.
When there’s data to report, the GPIO interface outputs the high level, the module is powered on, the serial communication is established, and the MCU synchronizes the data to the Cloud and client end. After reporting the data, the GPIO interface outputs the low level, the module is in a reset state, and the module consumes little power.
Disadvantages: There is a 10-K pull-up resistor in the CEN or RST pin. When the module is in a reset state, there is still an input current of 330uA.
ZT2S uses the PCB antenna with a gain of 2 dBi.
To ensure the best RF performance, it is recommended that the antenna be at least 15 mm away from other metal parts. If metal materials wrap around the antenna, the wireless signal will be greatly attenuated, thereby deteriorating the RF performance. When designing the finished product, please leave enough space for the antenna.
To prevent adverse impact on the antenna radiation performance, avoid copper or traces within the antenna area of the PCB.
The following figure shows the mechanical dimensions of ZT2S:
Set oven temperatures according to the following temperature curve of wave soldering. The peak temperature is 260°C±5°C.
Recommended soldering temperature:
|Suggestions on oven temperature curve of wave soldering||Suggestions on manual soldering temperature|
|Preheat temperature||80 to 130 °C||Soldering temperature||360±20°C|
|Preheat time||75 to 100s||Soldering time||＜3s/point|
|Peak contact time||3 to 5s||NA||NA|
|Temperature of tin cylinder||260±5°C||NA||NA|
Storage conditions for a delivered module:
The moisture-proof bag is placed in an environment where the temperature is below 40°C and the relative humidity is lower than 90%.
The shelf life of a dry-packaged product is 12 months from the date when the product is packaged and sealed.
There is a humidity indicator card (HIC) in the packaging bag.
|Product model||MOQ (pcs)||Packing method||Modules per reel||Reels per carton|
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this device.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Note: This device has been tested and found to comply with the limits for a Class B digital device, according to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses, and can radiate radio frequency energy and, if not installed and used following the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
If this device does cause harmful interference to radio or television reception, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Radiation Exposure Statement
This device complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This device should be installed and operated with a minimum distance of 20cm between the radiator and your body.
This radio module must not be installed to co-locate and operating simultaneously with other radios in the host system except following FCC multi-transmitter product procedures. Additional testing and device authorization may be required to operate simultaneously with other radios.
The availability of some specific channels and/or operational frequency bands are country dependent and are firmware programmed at the factory to match the intended destination. The firmware setting is not accessible by the end-user.
The host product manufacturer is responsible for compliance with any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. The final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.
The end-user manual shall include all required regulatory information/warnings as shown in this manual, including “This product must be installed and operated with a minimum distance of 20 cm between the radiator and user body”.
This device has got an FCC ID: 2ANDL-ZT2S. The end product must be labelled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-ZT2S”.
This device is intended only for OEM integrators under the following conditions:
The antenna must be installed such that 20cm is maintained between the antenna and users, and the transmitter module may not be co-located with any other transmitter or antenna.
As long as the 2 conditions above are met, further transmitter tests will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed.
Declaration of Conformity European Notice
Hereby, Hangzhou Tuya Information Technology Co., Ltd declares that this module product complies with essential requirements and other relevant provisions of Directive 2014/53/EU, 2011/65/EU. A copy of the Declaration of conformity can be found at https://www.tuya.com.
This product must not be disposed of as normal household waste, in accordance with the EU directive for waste electrical and electronic equipment (WEEE-2012/19/EU). Instead, it should be disposed of by returning it to the point of sale, or to a municipal recycling collection point.
The device could be used with a separation distance of 20cm to the human body.
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