DS1302DTR from XBLW, 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 dual-supply configuration (2.0V-5.5V). DS1302 draws from the larger of VCC1 or VCC2: when VCC2 > VCC1 + 0.2V, VCC2 powers the device; otherwise VCC1 does.
2	X1	passive	Connection for a standard 32.768 kHz quartz crystal (specified load capacitance 6 pF). May alternatively be driven by an external 32.768 kHz oscillator signal (with X2 left floating).
3	X2	passive	Second connection for the 32.768 kHz quartz crystal. Leave floating if X1 is driven by an external oscillator.
4	GND	power_in	Device ground reference (0V).
5	CE	input	Chip-enable input; must be driven high during a read or write to enable the shift-register access. Has an internal 40 kΩ (typ) pulldown to ground. Previously called RST in older revisions (functionality unchanged).
6	I/O	bidirectional	Bidirectional data pin (push-pull output) for the 3-wire serial interface. Has an internal 40 kΩ (typ) pulldown to ground; tri-states when CE is low or on each SCLK rising edge during reads.
7	SCLK	input	Serial-clock input used to synchronize data movement on the 3-wire interface (DC to 2.0 MHz at VCC=5V, DC to 0.5 MHz at VCC=2V). Has an internal 40 kΩ (typ) pulldown to ground.
8	VCC1	power_in	Low-power/battery-backup supply pin. In systems using the trickle charger, the rechargeable energy source (e.g. UL-recognized lithium coin cell) is connected here; internal circuitry prevents reverse charging current.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

DS1302DTR
DS1302DTRN

CAD (KiCad official)

Symbol: DS1302DTR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ds1302dtr.step`	122 KB	You want the bare part, or you mark your own boards.
`ds1302dtr-etched.step`	2.1 MB	You want the part with `DS1302DTR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 509 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: XBLW datasheet (16 pp, sha256 4dffa2998571d25e, 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