component
HT1381
Public Made by Adomby adom
lingxingic Real Time Clocks, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownHT1381
lingxingic · Real Time Clocks · SOP-8
HT1381 from lingxingic, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | NC | unconnected | No connect |
| 2 | X1 | input | Crystal oscillator input connected to external 32.768 kHz crystal |
| 3 | X2 | output | Crystal oscillator output connected to external 32.768 kHz crystal |
| 4 | VSS | power_in | Ground |
| 5 | RST | input | Reset input for serial transfer, set low to clear internal registers then high to enable logic control |
| 6 | I/O | bidirectional | Bidirectional serial data input/output port for reading from and writing to internal registers |
| 7 | SCLK | input | Serial clock input with maximum frequency 0.5 MHz at 2V or 2 MHz at 5V |
| 8 | VDD | power_in | Positive power supply with operating voltage range of 2.0V to 5.5V |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | lingxingic |
| Package | SOP-8 |
| Category | Clock/Timing |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
HT1381 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
ht1381-etched.step/ht1381-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ht1381.step/ht1381.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: lingxingic datasheet (17 pp, sha256
5d87970e70ed3af5, retrieved 2026-09-22, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).