Description

The VT-ITX-433M module is very low power consumption ASK transmitter for operation in the frequency band 433MHz. The module offers a high level integrative and needs no external components.

There is a power down feature to save power source life and a divided clock output.

Key Features

Center frequency is 433.92MHz

Modulation is ASK

High efficiency power amplifier 10dBm

 Fully integrated frequency synthesizer

 Low supply current typ.14.2mA 3.0VDC

Power down mode with very low power consumption

Typ.0.3nA 3.0VDC

 Supply voltage range 2.1~4VDC

Small size 12.0×15.0mm

Application

 Keyless entry systems

 Remote control systems

 Garage door openers

 Alarm systems

 Security systems

 Wireless sensors

Specification

Testing condition:Ta=25°C, VCC=5.0V

Parameter Value Condition/Note

Center Frequency 433.92MHz

Modulation ASK

Output Power 10dBm

Transmit Current 14.2mA 3.0VDC

Distance 700 meter Open area; Max output power; 1kbps Radio Date Rate

Operate Humidity 10%~90%

Operate Temperature -25℃~75℃

Power Source 2.1~4VDC ±100mV

Antenna 50ohm

Size 12.0×15.0mm

Note:

1. Noted that lower input voltage causes of lower output power.

2. Noted that the operate temperature out of range -25℃~75℃ will influence the center frequency.

3. Be sure to use a match antenna and mount it in the right way.

4. The environment will influence the communication disdance much.

Pin Description

Pin Type Description

VCC Supply Voltage DC 4.5~5.5V

GND GND Connect to the system ground

DATA Data input

EN Power Down Input Enter the power down mode

GND GND Connect to the system ground

ANT Antenna Antenna interface 50ohm

Dimensions

Typical Application

Antennas

We offer many kinds of antennas. We can design a matching antenna for specific conditions. Some of the antennas are show on the Tab 1.

Tab 1 Antenna

Spring Antenna

Small size

 Low cost

 Easy to embedded

SMA Plastic Antenna

 Medium size

Low cost

High gain

Sucker Antenna

High gain

Have sucker

 Easy to fix