component
AiP1307SA8.TR
Public Made by Adomby adom
Wuxi I-core Elec Real-time Clocks (RTC), SOP-8. Pinout cross-checked by two models against the datasheet, 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
markdownAiP1307SA8.TR
Wuxi I-core Elec · Real-time Clocks (RTC) · SOP-8
AiP1307SA8.TR from Wuxi I-core Elec, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | X1 | input | Connects to a standard 32.768 kHz crystal with internal load capacitance CL, or to an external 32.768 kHz oscillator as its oscillator input. |
| 2 | X2 | output | Internal oscillator output for the crystal, which must be left floating when X1 is driven by an external oscillator. |
| 3 | VBAT | power_in | Standard 3 V lithium backup supply input whose voltage must stay between the stated minimum and maximum limits (2.0 V to 3.5 V), with a series diode between battery and VBAT not recommended; VBAT must be grounded if no backup supply is used. |
| 4 | GND | power_in | Ground reference for the device. |
| 5 | SDA | bidirectional | I2C serial data input/output with open-drain structure that requires an external pull-up resistor. |
| 6 | SCL | input | I2C serial clock input that synchronizes data transfer on the serial interface. |
| 7 | SQW/OUT | output | Open-drain square-wave or fixed-level output (1 Hz, 4.096 kHz, 8.192 kHz or 32.768 kHz when SQWE=1) that requires an external pull-up resistor. |
| 8 | VCC | power_in | Main supply: the device is fully accessible for read and write when VCC is within the recommended range of 4.5 V to 5.5 V, and read/write is blocked when VCC falls below the write-protect voltage while a backup battery is connected. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Wuxi I-core Elec |
| Package | SOP-8 |
| Category | RTC/Clock Chip |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage, all pins except GND | VI | -0.5 | 7 | V | 4 | ||
| Operating ambient temperature | Tamb | -40 | 85 | ℃ | 4 | ||
| Storage temperature | Tstg | -65 | 125 | ℃ | 4 | ||
| Soldering temperature (SOP) | TL | 250 | ℃ | 10 s, SOP | 4 | ||
| Main supply voltage | VCC | 4.5 | 5 | 5.5 | V | 4 | |
| Standby (backup) supply voltage | VBAT | 2 | 3 | 3.5 | V | 4 | |
| High-level input voltage | VIH | 2.4 | V | maximum printed as VCC+0.3 | 4 | ||
| Low-level input voltage | VIL | -0.3 | 0.8 | V | 4 | ||
| Input leakage current | ILI | -1 | 1 | µA | SCL, SDA, VIN=VCC or GND | 4 | |
| Output high-impedance leakage current | ILO | -1 | 1 | µA | SDA, SQW/OUT | 4 | |
| Output low-level voltage | VOL | 0.4 | V | SQW/OUT, IOL=5mA | 4 | ||
| Operating current | ICCA | 1.5 | mA | VCC=5V, OSC ON, fSCL=100KHz | 4 | ||
| Quiescent (static) current | ICCS | 200 | µA | VCC=5V, OSC OFF, SDA=SCL=5V | 4 | ||
| Standby supply leakage current | IBATLKG | 5 | 50 | nA | VCC=5V, VBAT=3V | 4 | |
| VBAT current, oscillator on, SQW/OUT off | IBAT1 | 300 | 500 | nA | VCC=0V, VBAT=3V, OSC ON, SQW/OUT OFF | 4 | |
| VBAT current, oscillator on, SQW/OUT on (32KHz) | IBAT2 | 480 | 800 | nA | VCC=0V, VBAT=3V, OSC ON, SQW/OUT ON(32KHz) | 4 | |
| VBAT data retention current | IBATDR | 10 | 100 | nA | VCC=0V, VBAT=3V, OSC OFF | 4 | |
| Read/write protection voltage (printed as multiple of VBAT) | VPF | 1.216 | 1.25 | 1.284 | V | VBAT=3V; printed as 1.216×VBAT / 1.25×VBAT / 1.284×VBAT | 4 |
| SCL clock frequency | fSCL | 0 | 100 | KHz | 5 | ||
| Bus free time between STOP and START | tBUF | 4.7 | µs | 5 | |||
| Hold time (repeated) START condition | tHD:STA | 4 | µs | Note 1 | 5 | ||
| SCL low period | tLOW | 4.7 | µs | 5 | |||
| SCL high period | tHIGH | 4 | µs | 5 | |||
| Setup time for repeated START condition | tSU:STA | 4.7 | µs | 5 | |||
| Data hold time | tHD:DAT | 0 | µs | Note 2 | 5 | ||
| Data setup time | tSU:DAT | 250 | ns | 5 | |||
| SDA and SCL rise time | tR | 1000 | ns | 5 | |||
| SDA and SCL fall time | tF | 300 | ns | 5 | |||
| STOP condition setup time | tSU:STO | 4.7 | µs | 5 | |||
| Equivalent series resistance of external crystal | ESR | 45 | KΩ | external 32.768KHz crystal | 6 | ||
| Load capacitance of external crystal | CL | 12.5 | pF | external 32.768KHz crystal | 6 | ||
| Nominal crystal frequency | fo | 32.768 | KHz | external crystal | 6 |
CAD (KiCad official)
- Symbol:
AiP1307SA8.TR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
aip1307sa8-tr-etched.step/aip1307sa8-tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);aip1307sa8-tr.step/aip1307sa8-tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Wuxi I-core Elec datasheet (13 pp, sha256
31b6ef3bf4e4c2b2, retrieved 2026-11-05, 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 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(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).