Skip to main content

EV1527 One Time Programmable Encoder IC

EV1527 is an OTP Encoder utilizing the CMOS technology process. EV1527 is a maximum of 20 bits providing up to 1 million codes. It can reduce any code collision and unauthorized code scanning possibilities.


EV1527 Pinout Configuration

Pin Number

Pin Name

Pin Description



Oscillator input pull-sp R to Vcc



Positive power supply






Data out Pin



Data input with pull-low R



Data input with pull-low R



Data input with pull-low R



Data input with pull-low R


Features and Specifications

  • CMOS Technology
  • Low standby Current1.0uA
  • Wide range of Operating Voltage: Vcc=3.0,--12V
  • Up to 4 data pins
  • Total 1048576 address codes
  • Single Resistor Oscillator
  • Storage Temperature -40~125 *C
  • Operating Temperature -20~70 *C
  • Max Power Dissipation 300mW
  • Available in DIP and SOP Package


EV1527 Equivalent ICs

HT12E, PT2262, 74C922


Where to use EV1527 Encoder IC

The IC EV1527 can be used in many different applications. This IC comes with a 20-bit one-time programmable encoder that utilizes a CMOS processor, with a pair of decoder IC it can be used in a variety of different applications, it’s a 20-bit encoder IC that means it can transmit 20-bit data with a compatible decoder pair, to ensure that the encode and the decoder does not interfere with each other in a there is a 4-bit address which ensures optimal communication in between an encoder and decoder, With 4-bit data, we can create 16 types (24 = 16) of combinations these IC’s are commonly used with RF pairs or IR pairs. So, if you are working on a project which has to transmit 4-bit data from one end to another either by wire or wireless then this IC pair will be best suited for you. A pinout of the IC is shown below.

EV1527 IC Pinout


The list of oscillator calibration resistors of the devices is shown below

EV1527 Oscillator Calibration Resistor List

The Encoder Address Combination Table is shown below

EV1527 Encoder Address Combination Table


How to use EV1527 Encoder IC

We can use this IC for many different applications, like RF communication, encoding and decoding in embedded applications, and more. A basic application circuit of this IC is shown below.

EV1527 Circuit Diagram

In the above example, we have used the EV1527 IC to make a RF encoder circuit. Four buttons are used to set the address of the device, after acquiring the address from the IC it drives a RF transistor and the transistor drives a tank circuit, this is how the circuit works.



  • Home automation
  • Transmit Serial data for a short distance
  • Car security system
  • Wireless logging
  • Short distance communication


2D Model and Dimensions

If you are designing a PCB or Perf board with this component then the following picture from the EV1527 Datasheet will be useful to know its package type and dimensions.

EV1527 Dimensions

Component Datasheet

Related Post

Join 20K+subscribers

We will never spam you.

* indicates required

Be a part of our ever growing community.