Holy Stone Enterprise Co., Ltd OT-STM315/434AB DESCRIPTION STM is a low coast A.S.K. SAW transmitter module. It makes RF remote techniques easily, just input the data code and output with a high stability RF signal. FEATURES SAW chip on board technology Low power consumption Operation temperature range : ﹣20℃～＋70℃ Wide range of operation voltage : 1.5～15 Volts. Easy for application RF output -10~+16dBm at 3V DC operation voltage Available frequency at follows : 433.92 / 315 MHz PIN ASSIGNMENT APPLICATIONS Car security system Garage door controller Home security Wireless mouse Automation system BLOCK DIAGRAM １ Absolute Maximum Ratings Parameter Rating Units ﹣0.3 to 15 V DC ﹣0.3 to VDD+0.3 V DC ﹣20 to 70 ℃ ﹣40 to 150 ℃ Supply Voltage Data Input Voltage Operating Temperature Storage Temperature Specification Parameter Min. Frequency Range Typical Unit 315 Fix by SAW MHz 433.92 Frequency Accuracy A Frequency Accuracy B Frequency Accuracy AB Output Power Current Consumption Condition Max. ±75 kHz ±250 kHz ±150 kHz 0 1 3 dBm At 3 Volt. Power 50Ω Load 3 5 8 dBm At 12Volt. Power 50Ω Load 3 4 5 mA At 3 Volt. Power Data Input = VDD 17 20 25 mA At 12Volt. Power Data Input = VDD 0 1 2 kHz Modulation On-Off Key (OOK) Frequency PIN NO. Function Description 1 RF Output OSC Unbuffered Output 2 GND Ground Connection 3 Data Input On-Off Key Logic Data Input ２ Inter Connection 4 VCC DC Positive Power Supply PACKAGE DIMENSION DIMENSIONS (UNIT : mm) FREQUENCY STM SIZE A B C D 303～315 MHz L 7.60 11.0 1.70 3.0 340～434 MHz S 6.80 10.0 1.70 3.0 ３