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WCH CH454S

Manufacturer
WCHAsian Brands
MPN
CH454S
LCSC Part #
C111671
Packaging
SOP-28-300mil
Customer #
Key Attributes
2.8V~5.3V I²C 20mA 150mA SOP-28-300mil Display Drivers
Datasheetpdf iconWCH CH454S
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QtyUnit Price(Reference Only)Total Amount
1+$ 2.0996$ 2.10
10+$ 1.7806$ 17.81
25+$ 1.5804$ 39.51
100+$ 1.3769$ 137.69
500+$ 1.2842$ 642.10
1,000+$ 1.2451$ 1245.10
2,400+$ 1.2288$ 2949.12
3,600+$ 1.2174$ 4382.64
Standard Packaging25/Full Tube
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Display Drivers
ManufacturerWCH
PackagingSOP-28-300mil
Voltage - Supply2.8V~5.3V
Configuration16 Segment x 8 Digit;17-segment x 7-digit
Operating Temperature-40℃~+85℃
Pd - Power Dissipation-
Clock Frequency-
Quiescent Current-
InterfaceI²C
FeaturesPWM dimming;Internal reset function
Segment Drive Current20mA
Digit Drive Current150mA
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Introduction

AI Translation

CH454 is an LED digital tube display driver and keyboard scan controller IC. The chip integrates an internal clock oscillator circuit, capable of dynamically driving 8-digit 16-segment LED digital tubes or 128 LEDs, supporting 11-segment, 14-segment, 16-segment×8, and 17-segment×7 configurations, while scanning a 64-key keyboard. CH454 exchanges data with a microcontroller via a 2-wire serial interface.

Features

AI Translation
  • Built-in current drive stage with segment current ≥20mA and digit current ≥150mA.
  • Dynamic display scan control, directly driving up to 8-digit 16-segment LED displays or 128 individual LEDs.
  • Independent blinking control per digit with selectable slow or fast blink rate.
  • 16-level brightness control via duty cycle adjustment.
  • Partial segment addressing for independent on/off control of the first 64 LEDs or the first 8 segments of each digit.
  • Scan limit control supporting 1–8 digits, allocating scan time only to active digits.
  • Selectable digit drive output polarity for easy external expansion of drive voltage and current.
  • Built-in 64-key keyboard controller based on 8×8 matrix scan.
  • Built-in pull-down resistors and debounce circuitry for key status inputs.
  • Active-low keyboard interrupt output.
  • Key release flag for querying key press and release status.
  • Key wake-up support: CH454 can be woken from low-power/power-saving state by a designated key.
  • Two-wire serial interface compatible with I²C bus, minimizing pin count.
  • Built-in clock oscillator — no external clock or oscillator components required, with enhanced noise immunity.
  • Low-power sleep mode for power saving, wake-up via key press or command.
  • Available in SOP28 and SDIP32 lead-free packages, RoHS compliant.