component

DS1302ZM

Public Made by Adom

by adom

HGSEMI Real-time Clocks (RTC), SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs ds1302zm: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
ds1302zm-etched.fit.json ds1302zm: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ds1302zm-etched.glb ds1302zm: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ds1302zm-etched.step ds1302zm: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
ds1302zm.glb Publish 0.1.0 · Ray
ds1302zm.kicad_mod Publish 0.1.0 · Ray
ds1302zm.kicad_sym Publish 0.1.0 · Ray
ds1302zm.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
ds1302zm.step Publish 0.1.0 · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json ds1302zm: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md ds1302zm: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

DS1302ZM

HGSEMI · Real-time Clocks (RTC) · SOP-8

DS1302ZM from HGSEMI, 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 VCC2 power_in Primary power supply pin in a dual-supply configuration (2.0-5.5V). DS1302 draws from the larger of VCC1 or VCC2; VCC2 powers the chip when VCC2 > VCC1 + 0.2V.
2 X1 passive Connection for a 32.768 kHz quartz crystal (specified load capacitance 6 pF). May alternatively be driven by an external 32.768 kHz oscillator signal (with X2 floated).
3 X2 passive Connection for a 32.768 kHz quartz crystal (specified load capacitance 6 pF). Leave floating if X1 is driven by an external oscillator.
4 GND power_in Device ground reference.
5 RST input Reset / chip-enable input (active high per the datasheet: 'The reset signal must be asserted high during a read or a write'). Initiates all data transfers and can terminate single- or multi-byte transfers; when low, the I/O pin goes to high impedance.
6 I/O bidirectional Bi-directional serial data pin for the 3-wire interface. Tri-states on each rising edge of SCLK during data output; data is clocked in on rising edges and out on falling edges of SCLK.
7 SCLK input Serial clock input used to synchronize data movement on the 3-wire serial interface. Must be at logic 0 when RST is driven high.
8 VCC1 power_in Backup/low-power supply pin (2.0-5.5V). Connects to a battery or, when the trickle charger is used, to a rechargeable cell or super-cap; powers the DS1302 whenever VCC2 < VCC1.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOP-8
Category RTC
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • DS1302ZM/TR
  • DS1302M/TR
  • DS1302N
  • DS1302ZN
  • DS1302MM/TR
  • DS1302ZMM/TR
  • DS1302DQ/TR
  • DS1302DQ3/TR
  • DS1302ZDQ/TR
  • DS1302ZDQ3/TR

CAD (KiCad official)

  • Symbol: DS1302ZM
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: ds1302zm-etched.step / ds1302zm-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ds1302zm.step / ds1302zm.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ds1302zm.step 122 KB You want the bare part, or you mark your own boards.
ds1302zm-etched.step 1.9 MB You want the part with DS1302ZM already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 460 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: HGSEMI datasheet (16 pp, sha256 3fcd6fbdc5e0c4e6, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF