component
DS1307ZN+T&R
Public Unreviewedby Ray
Analog Devices Inc Maxim Integrated 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
markdownDS1307ZN+T&R
Analog Devices Inc Maxim Integrated · Real Time Clocks · SOP-8
DS1307ZN+T&R from Analog Devices Inc Maxim Integrated, 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 for a standard 32.768kHz quartz crystal (specified CL = 12.5pF). X1 is the input to the internal oscillator; it can alternatively be driven by an external 32.768kHz oscillator (in which case X2 must be floated). |
| 2 | X2 | output | Output of the internal 32.768kHz oscillator; the other terminal of the external quartz crystal connects here. Must be left floating if an external oscillator is driving X1. |
| 3 | VBAT | power_in | Backup supply input for a standard 3V lithium cell or other energy source (2.0V to 3.5V, 3V typ). Nominal power-fail trip point is 1.25 x VBAT. Must be tied to ground if a backup supply is not used. A 48mAh lithium cell backs up the DS1307 for >10 years at +25 degC. |
| 4 | GND | power_in | Ground reference (0V) for the device. |
| 5 | SDA | bidirectional | I2C serial data input/output. Open-drain output requiring an external pullup resistor; pullup voltage may be up to 5.5V independent of VCC. Input logic thresholds: VIL max 0.8V, VIH min 2.2V; VOL max 0.4V at IOL = 5mA. |
| 6 | SCL | input | I2C serial clock input (0 to 100kHz), used to synchronize data movement on the serial interface. Pullup voltage may be up to 5.5V regardless of VCC. |
| 7 | SQW/OUT | output | Square-wave/output driver. When the SQWE control-register bit is set, the pin outputs one of four square-wave frequencies (1Hz, 4.096kHz, 8.192kHz, or 32.768kHz). Open-drain; requires an external pullup (up to 5.5V). Operates from either VCC or VBAT; may be left floating if unused. |
| 8 | VCC | power_in | Primary power supply input (4.5V to 5.5V, 5.0V typ). When VCC is above 1.25 x VBAT the device operates from VCC; when VCC falls below VBAT the device switches to battery-backup mode and inhibits reads/writes while continuing timekeeping. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc Maxim Integrated |
| Package | SOP-8 |
| Category | Clock/Timing |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
DS1307ZN+T&RZ+DS1307ZN+T&RDS1307ZN+T&RZ+T&RDS1307ZN+T&R+
CAD (KiCad official)
- Symbol:
DS1307ZN+T&R - 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: Analog Devices Inc Maxim Integrated datasheet (14 pp, sha256
4114781b89b9a71a, 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).