component
PT7C4372ALEX
Public Made by Adomby adom
Diodes Incorporated Real Time Clocks, TSSOP-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
markdownPT7C4372ALEX
Diodes Incorporated · Real Time Clocks · TSSOP-8
PT7C4372ALEX from Diodes Incorporated, in a TSSOP-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 | /INTB | output | Interrupt B, open-drain output that outputs alarm interrupts and periodic interrupts. |
| 2 | SCL | input | I2C serial clock line; data on SDA is synchronized with this clock, and up to 6 V beyond Vcc may be input. |
| 3 | SDA | bidirectional | I2C serial data line, open-drain output when driving; when used as input, up to 6 V beyond VCC may be applied. |
| 4 | GND | power_in | Ground. |
| 5 | /INTA | output | Interrupt A, open-drain output that outputs alarm interrupts and periodic interrupts. |
| 6 | OSCOUT | output | Oscillator circuit output; a crystal oscillator is connected between OSCIN and OSCOUT. |
| 7 | OSCIN | input | Oscillator circuit input; a crystal oscillator is connected between OSCIN and OSCOUT. |
| 8 | Vcc | power_in | Power supply pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TSSOP-8 |
| Category | Clock/Timing |
| 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 |
|---|---|---|---|---|---|---|---|
| VCC Power voltage | VCC | 1.8 | 6 | V | 3 | ||
| Timekeeping voltage | VOSC | 1.3 | 5.5 | V | 3 | ||
| Applied voltage when OFF (SCL, SDA, /INTA, /INTB pins) | VPUP | -0.3 | 5.5 | V | 3 | ||
| Operating temperature | TA | -40 | 85 | ºC | 3 | ||
| Supply Voltage to Ground Potential (Vcc to GND) | -0.3 | 6.5 | V | 3 | |||
| DC Output Voltage (SDA, /INTA, /INTB pins) | -0.3 | 6.5 | V | 3 | |||
| DC Input (all other inputs except Vcc & GND) | -0.3 | V | 3 | ||||
| Storage Temperature | -65 | 150 | °C | 3 | |||
| Ambient Temperature with Power Applied | -40 | 85 | °C | 3 | |||
| Frequency tolerance (stability) | f / f | -5 | 5 | 10 -6 | TA = +25°C, Vcc = 3.0 V | 4 | |
| Frequency voltage characteristics | f / V | -2 | 2 | 10 -6 / V | TA = +25°C, Vcc = 2 V to 5 V | 4 | |
| Top frequency temperature characteristics | -120 | 10 | 10 -6 | TA = -10°C to +70°C, Vcc = 3.0 V; +25°C reference | 4 | ||
| Oscillation start up time | tSTA | 3 | s | TA = +25°C, Vcc = 3 V | 4 | ||
| Aging (first year) | fa | -5 | 5 | 10 -6 / year | TA = +25°C, VCC = 3.0 V; first year | 4 | |
| Current consumption (interface active) | ICC1 | 150 | µA | Interface is active at 400kHz | 4 | ||
| Current consumption (interface inactive, 32768Hz SQW enabled) | ICC2 | 500 | 1000 | nA | Interface is inactive, enable 32768Hz SQW wave output | 4 | |
| Current consumption (interface inactive, 32768Hz SQW disabled) | ICC3 | 400 | 800 | nA | Interface is inactive, disable 32768Hz SQW wave output | 4 | |
| Low-level input voltage (SCL, SDA, FOE) | VIL | -0.3 | V | 4 | |||
| High-level input voltage | VIH | 6 | V | 4 | |||
| Low-level output current (/INTA, /INTB) | IOL | 1 | mA | VOL = 0.4 | 4 | ||
| Low-level output current (SDA) | IOL | 6 | mA | VOL = 0.6 | 4 | ||
| Input leakage current (SCL) | IIL | -1 | 1 | µA | VI = 5.5V or GND, VCC = 5.5V | 4 | |
| Output current when OFF (SDA, /INTA, /INTB) | IOZ | -1 | 1 | µA | VO = 5.5V or GND, VCC = 5.5V | 4 | |
| SCL clock frequency | fSCL | 400 | kHz | 5 | |||
| START condition set-up time | tSU;STA | 0.6 | µs | 5 | |||
| START condition hold time | tHD;STA | 0.6 | µs | 5 | |||
| Data set-up time (RTC read/write) | tSU;DAT | 200 | ns | 5 | |||
| Data hold time (RTC write) | tHD;DAT1 | 35 | ns | 5 | |||
| Data hold time (RTC read) | tHD;DAT2 | 0 | µs | 5 | |||
| STOP condition setup time | tSU;STO | 0.6 | µs | 5 | |||
| Bus idle time between a START and STOP condition | tBUF | 1.3 | µs | 5 | |||
| SCL low period | tLOW | 1.3 | µs | When SCL = "L" | 5 | ||
| SCL high period | tHIGH | 0.6 | µs | When SCL = "H" | 5 | ||
| Rise time for SCL and SDA | tr | 0.3 | µs | 5 | |||
| Fall time for SCL and SDA | tf | 0.3 | µs | 5 | |||
| Allowable spike time on bus | tSP | 50 | ns | only reference for design | 5 | ||
| Duration of starting to stopping | tD | 0.5 | µs | 5 |
CAD (KiCad official)
- Symbol:
PT7C4372ALEX - Footprint:
Package_SO:TSSOP-8_3x3mm_P0.65mm - 3D model: TSSOP-8 (KiCad packages3D, STEP)
- 3D model files:
pt7c4372alex-etched.step/pt7c4372alex-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pt7c4372alex.step/pt7c4372alex.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (30 pp, sha256
a9c7ab0ccdfa5fd2, retrieved 2026-10-19, tier: lcsc) - 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).