Library

TM1637

LED driver with keypad scan, 4-digit 7-segment, SOP-20

⚡ Install this component

Paste this into Claude Code (VS Code panel, Adom editor, or terminal) to install:

Search the Adom Wiki for the library component "TM1637" (slug: tm1637) at https://wiki-ufypy5dpx93o.adom.cloud/wiki/libraries/tm1637. Pull down the KiCad symbol, footprint, and 3D model files from the wiki page's assets. Install them into my current KiCad project and register in sym-lib-table and fp-lib-table. If the page has a datasheet URL, save that too.
Manufacturer Titan Micro
Package SOP-20
Pins 20 pins (Grid, Segment, Serial, Keypad, Power)
LCSC C50881
Supply 3.3V-5.5V
Display 6x8 segments
Key Scan 2x8 matrix
Interface 2-wire (CLK+DIO)

Library View

Interactive symbol, footprint, and 3D model — hover pins for cross-highlighting.

SymbolGenerated Generated from pin data (not in KiCad standard library)
FootprintKiCad KiCad standard library: Package_SO/SOP-20_7.5x12.8mm_P1.27mm
3DGenerated Generated pad visualization (Babylon.js)

Breakout Board

Auto-generated breakout molecule for TM1637 — all pins brought to 2mm-pitch headers with 4 corner machine pins on 8mm grid.

Pricing & Availability

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DigiKey Not available
JLCPCB Not available

Specifications

Supply3.3V-5.5V
Display6x8 segments
Key Scan2x8 matrix
Interface2-wire (CLK+DIO)
PackageSOP-20

Pin Configuration

GridSegmentSerialKeypadPower
PinNameGroupFunction
Grid — Grid/digit select outputs
1SG1GridSegment/grid output 1
2SG2GridSegment/grid output 2
3SG3GridSegment/grid output 3
4SG4GridSegment/grid output 4
5SG5GridSegment/grid output 5
6SG6GridSegment/grid output 6
Segment — Segment drive outputs
9K1SegmentKey scan input 1
10K2SegmentKey scan input 2
11VDDSegmentSupply voltage (3.3V-5.5V)
12GNDSegmentGround
13NCSegmentNo connection
14NCSegmentNo connection
15NCSegmentNo connection
16CLKSegmentClock input
Serial — Clock and data
17DIOSerialData I/O (bidirectional)
18GRID1SerialGrid driver 1
Keypad — Key scan inputs
19GRID2KeypadGrid driver 2
20GRID3KeypadGrid driver 3
Power — Supply and ground
7SG7PowerSegment/grid output 7
8SG8PowerSegment/grid output 8

AI Skill Technical Reference

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TM1637 — LED driver with keypad scan, 4-digit 7-segment, SOP-20

Manufacturer: Titan Micro Package: SOP-20 LCSC: C50881

Description

The TM1637 is an LED driver IC that supports up to 6 digits of 7-segment display and 16-key keypad scanning. Uses a two-wire serial interface. Common in cheap 4-digit clock display modules.

Electrical Specifications

  • Supply: 3.3V-5.5V
  • Display: 6x8 segments
  • Key Scan: 2x8 matrix
  • Interface: 2-wire (CLK+DIO)
  • Package: SOP-20

Pin Configuration

Package: SOP-20

  • Pin 1: SG1 — Segment/grid output 1
  • Pin 2: SG2 — Segment/grid output 2
  • Pin 3: SG3 — Segment/grid output 3
  • Pin 4: SG4 — Segment/grid output 4
  • Pin 5: SG5 — Segment/grid output 5
  • Pin 6: SG6 — Segment/grid output 6
  • Pin 7: SG7 — Segment/grid output 7
  • Pin 8: SG8 — Segment/grid output 8
  • Pin 9: K1 — Key scan input 1
  • Pin 10: K2 — Key scan input 2
  • Pin 11: VDD — Supply voltage (3.3V-5.5V)
  • Pin 12: GND — Ground
  • Pin 13: NC — No connection
  • Pin 14: NC — No connection
  • Pin 15: NC — No connection
  • Pin 16: CLK — Clock input
  • Pin 17: DIO — Data I/O (bidirectional)
  • Pin 18: GRID1 — Grid driver 1
  • Pin 19: GRID2 — Grid driver 2
  • Pin 20: GRID3 — Grid driver 3

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0 revisions · Updated 2026-03-02 17:31:36