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CH455 Datasheet Led Drive And Keyboard Control Chip

Manufacturer: Unknown Manufacturer

Overview: English DataSheet of CH455 1 LED drive and keyboard control chip CH455 English DataSheet Version:1C http://wch.cn 1. Introduction CH455 is LED display drive and keyboard scan control chip. It sets clock surge circuit internally to drive four bits number LED or thirty two LEDs dynamically. And at the same time it can scan 28-key. CH455 exchanges data with MCU via two wires serial interface of SCL and SDA.. MCU etc SCL SDA INT# CH455 (broken line is optional) SEG7～SEG0 SEG6 ～ 7×4 matrix 28 keys board DIG3～DIG0 4 bits LED Or 32 LEDs 2.

Datasheet Details

Part number CH455
Manufacturer Unknown Manufacturer
File Size 178.29 KB
Description LED drive and keyboard control chip
Datasheet CH455-ETC.pdf

Key Features

  • Set display current drive layer internally, the current of segment is no less than 25mA, the current of word is no less than 160mA.
  • Display scan control dynamically, support 8×4 or 7×4, directly drive four bits number LED or thirty two LEDs.
  • Internal limit current, set eight level light control via space percentage.
  • Set 28-key keyboard control, based on 7×4 matrix scan.
  • Set pull-down resistor internal while key-press, glitter removable.
  • Supply keyboard interr.

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CH455 Distributor