STX885 : 315/433MHz ASK Transmitter Module With Coded

STX885 is a highly integrated, low-cost ASK transmitter module with coded that intergrets the ev1527 digital encoding circuit, high-precision oscillating circuit and power amplifier. The module's operating frequency is available in 315MHz and 433MHz. Its integrated high-precision oscillator, which can provides accurate pulse width accuracy for the system.The OOK modulation rate can reach 10kb/s. The design of the two encoding formats reduces the re-code rate and can generate multi-key composite codes to avoid Misoperation of special buttons. The STX885 features small size, low harmonics and is high stability for a wide range of wireless remote control systems.
STX885 is manufactured and tested strictly using lead-free process and complies with RoHS and Reach standards.

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Parameter	Min.	Typ.	Max.	Unit	Condition
Operation Conditions
Operating voltage range	2.0	3.0	3.6	V
Operating Temperature Range	-20	25	70	℃
Current Consumption
TX current		20	25	mA	@433MHz
Sleep current			1	uA
RF Parameters
Frequency Range	433.82	433.92	434.02	MHz	@433MHz
Frequency Range	314.9	315	315.1	MHz	@315MHz
Output Power		15		dBm	@3.3V
Modulation Rate	0.1		10	Kbps

Modulation	ASK
Frequency	315MHz,433MHz

Features of ASK transmitter module STX885

Operating frequency: 433MHz or 315 MHz (for optional)
Integrated ev1527 digital encoding circuit, 20-bit internal code, with 2 million encoding capabilities
sleep and fast wake-up function, zero standby power consumption
Meet various international testing standards
OOK modulation mode, speed up to 10kb/s
Ultra-high power long distance, reliable and stable frequency, super strong against power interference

Pin Number	Pin Definitions	Description
1	VCC	Power supply is positive, range 2.0V-3.6V
2, 9	GND	Power ground
3	K2	Key input, built-in pull-down resistor, high level TX
4	K0	Key input, built-in pull-down resistor, high level TX
5	K1	Key input, built-in pull-down resistor, high level TX
6	K3	Key input, built-in pull-down resistor, high level TX
7	K02	Key input, built-in pull-down resistor, high level TX
8	K03	Key input, built-in pull-down resistor, high level TX
10	ANT	Connect 50 ohm antenna

Mechanical Sizes of 315MHz ASK transmitter module STX885