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TM1638 Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
TM163810025Yes

TM1638 is an integrated circuit (IC) designed for driving LED displays and key scanning.

The TM1638 is an integrated circuit (IC) designed for driving LED displays and key scanning. Below are its specifications, descriptions, and features:

Manufacturer Specifications

  • Supply Voltage: 3.3V – 5.5V
  • LED Drive Capability: 8 segments × 16 common (128 LEDs max)
  • Key Scanning Capability: 8 × 3 matrix (24 keys max)
  • Communication Interface: Serial (SPI-like)
  • Operating Temperature: -40°C to +85°C
  • Package: SOP28 (28-pin Small Outline Package)

Descriptions

  • The TM1638 combines an LED driver, key scanning, and a microprocessor interface in a single chip.
  • It supports multiplexed LED displays (7-segment, 14-segment, or dot matrix) and can scan up to 24 keys.
  • Communication is achieved via a serial interface (data, clock, and strobe signals).
  • Commonly used in digital clocks, meters, and control panels.

Features

  • LED Display Control: Supports brightness adjustment (8 levels).
  • Key Scanning: Built-in debounce circuit for stable key detection.
  • Low Power Consumption: Suitable for battery-powered applications.
  • High Noise Immunity: Reliable operation in electrically noisy environments.
  • Simple Interface: Requires only three control lines (DIO, CLK, STB).

This information is based on the manufacturer's datasheet and technical documentation.

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