Encoder and Decoder Pairs CMOS

These devices are designed to be used as encoder/decoder pairs in remote control applications.

The MC145026 encodes nine lines of information and serially sends this information upon receipt of a transmit enable (TE) signal. The nine lines may be encoded with trinary data (low, high, or open) or binary data (low or high). The words are transmitted twice per encoding sequence to increase security.

• Operating Temperature Range: – 40 to + 85°C

• Very–Low Standby Current for the Encoder: 300 nA Maximum @ 25°C

• Interfaces with RF, Ultrasonic, or Infrared Modulators and Demodulators

• RC Oscillator, No Crystal Required

• High External Component Tolerance; Can Use ±5 Components

• Internal Power–On Reset Forces All Decoder Outputs Low

• Operating Voltage Range: MC145026 = 2.5 to 18 V*

MC145027, MC145028 = 4.5 to 18 V

• Low–Voltage Versions Available:

SC41343 = 2.8 to 10 V Version of the MC145027

SC41344 = 2.8 to 10 V Version of the MC145028

• For Infrared Applications, See Application Note AN1016/D