component

XL1307

Public Unreviewed

by Ray

XINLUDA Real-time Clocks (RTC), SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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XL1307

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

XL1307 from XINLUDA, 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 X1 input Connection to a standard 32.768 kHz quartz crystal (CL = 12.5 pF). X1 is the input to the internal oscillator and can alternatively be driven by an external 32.768 kHz oscillator; in that case X2 must be left floating.
2 X2 output Connection to the opposite terminal of the 32.768 kHz quartz crystal. X2 is the oscillator output; leave floating when an external oscillator drives X1.
3 VBAT power_in Backup supply input for a standard 3 V lithium cell or other energy source (recommended 2.0 V to 3.5 V). Battery must be tied directly (no series diodes). If no backup is used, VBAT must be grounded. Power-fail trip point VPF = 1.25 × VBAT nominal.
4 GND power_in Ground reference for the device.
5 SDA bidirectional I2C serial data input/output. Open-drain output requiring an external pull-up resistor; pull-up voltage may be up to 5.5 V regardless of VCC.
6 SCL input I2C serial clock input used to synchronize data movement on the serial interface. Requires an external pull-up; pull-up voltage may be up to 5.5 V regardless of VCC. fSCL up to 100 kHz.
7 SQW/OUT output Square-wave/output driver. When SQWE = 1, outputs one of four selectable frequencies (1 Hz, 4 kHz, 8 kHz, 32 kHz). Open-drain; requires external pull-up (up to 5.5 V). Operates from either VCC or VBAT. May be left floating if unused.
8 VCC power_in Primary power supply, 4.5 V to 5.5 V (5.0 V nominal). When VCC > 1.25 × VBAT the device is fully accessible; below this threshold reads and writes are inhibited but timekeeping continues from VBAT.

Key specifications

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

CAD (KiCad official)

  • Symbol: XL1307
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: XINLUDA datasheet (15 pp, sha256 3c124bb9d9354515, 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