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MCS3122
  • MCS3122

MCS3122

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The MCS3122 is an advanced KeeLoq® encoder, designed for secure Remote Keyless Entry (RKE) and secure remote control systems. Typical applications include vehicles and home garage door openers. The MCS3122 delivers a cost effective, yet secure solution requiring very few external components. KeeLoq® is a Microchip proprietary technology deployed in millions of security applications. KeeLoq® is licensed for exclusive use on Microchip products....

Microchip Technology MCS3122 Product Info

16 April 2026 0

Parameters

Title

KEELOQ® Encoder Devices

Operating Voltage (V)

2.0 - 3.7

Function Codes

7

Transmission Code Length Bits

160

Code Hoppings Bits

128

Freq. Range

310-928

Modulation

ASK/FSK

Output Power dBm

0/+10

IO Pins

0

LEDs

1

Encryption Key Length

128

Seed Length

128

ICSP

Yes

Features

  • Programmable 32-bit serial number
  • Programmable 32-bit serial number for seed transmissions
  • AES-128 block cipher
  • Programmable 128-bit crypt key
  • 160/192-bit transmission code length
  • 32-bit unencrypted portion
  • 128-bit encrypted, code hopping portion
  • 32-bit authorization check (optional)
  • 2.0 to 3.7V operation
  • Three switch inputs
  • Seven functions available
  • One active-low LED drive
  • Configurable maximum code word
  • Configurable bit rate
  • Configurable modulation, supporting FSK and OOK
  • Configurable data modulation, supporting PWM and Manchester
  • Button inputs have internal pull-up resistor
  • 14pin 4.4mm TSSOP Package

Description

The MCS3122 is an advanced KeeLoq® encoder, designed for secure Remote Keyless Entry (RKE) and secure remote control systems. Typical applications include vehicles and home garage door openers. The MCS3122 delivers a cost effective, yet secure solution requiring very few external components.

KeeLoq® is a Microchip proprietary technology deployed in millions of security applications. KeeLoq® is licensed for exclusive use on Microchip products.

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