component
PT7C4337UEX
Public Made by Adomby adom
Diodes Incorporated Real Time Clocks, MSOP-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
markdownPT7C4337UEX
Diodes Incorporated · Real Time Clocks · MSOP-8
PT7C4337UEX from Diodes Incorporated, in a MSOP-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 | Oscillator circuit input; together with X2 the 32.768 kHz crystal is connected between them, or it accepts an external clock input. |
| 2 | X2 | output | Oscillator circuit output; together with X1 the 32.768 kHz crystal is connected between them, and X2 must be left floating when an external 32.768 kHz input is used. |
| 3 | INTA | output | Interrupt output that is asserted low when the time matches the alarm registers when enabled; it is open-drain and requires an external pull-up resistor. |
| 4 | GND | power_in | Ground reference for the device. |
| 5 | SDA | bidirectional | Serial data input/output for the 2-wire I2C interface; it is an open-drain output and requires an external pull-up resistor. |
| 6 | SCL | input | Serial clock input used to synchronize data movement on the I2C serial interface. |
| 7 | SQW/INTB | output | Programmable square-wave or interrupt output; it is open-drain and requires an external pull-up resistor. |
| 8 | VCC | power_in | Primary power supply for the PT7C4337; full operation is specified for VCC = 1.8 V to 5.5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | MSOP-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 |
|---|---|---|---|---|---|---|---|
| Storage temperature | -65 | 150 | ℃ | 3 | |||
| Supply voltage to ground potential (VCC to GND) | VCC | -0.3 | 6.5 | V | 3 | ||
| DC input (all other inputs except VCC and GND) | -0.3 | V | Max printed as VCC+0.3V | 3 | |||
| DC output voltage (SDA, /INTA, /INTB pins) | -0.3 | 6.5 | V | 3 | |||
| Power dissipation | 320 | mW | Depends on package | 3 | |||
| Junction temperature | 125 | ℃ | 3 | ||||
| Supply voltage VCC | VCC | 1.8 | 3.3 | 5.5 | V | 3 | |
| Timekeeping supply voltage | VCCT | 1.2 | 1.8 | V | I2C interface inactive | 3 | |
| Oscillator start up voltage | VOSC | 1.2 | 5.5 | V | 3 | ||
| Input high level, INTA and SQW/INTB | VIH | 5.5 | V | INTA, SQW/INTB | 3 | ||
| Input low level | VIL | -0.3 | V | Max printed as 0.3VCC | 3 | ||
| Operating temperature | TA | -40 | 85 | ºC | 3 | ||
| Supply voltage, full operation | VCC | 1.8 | 5.5 | V | Full operation; VCC = 1.8~5.5V, TA = -40 °C to +85 °C | 3 | |
| Timekeeping supply voltage | VCCT | 1.2 | 1.8 | V | Timekeeping; Note 5 | 3 | |
| Oscillator voltage | VOSC | 1.2 | 5.5 | V | VCC = 1.8~5.5V, TA = -40 °C to +85 °C | 3 | |
| Low-level input voltage, SCL | VIL1 | -0.3 | V | SCL; max printed as 0.3VCC | 3 | ||
| Low-level output current, SDA, /INTA, /INTB | IOL | 3 | mA | VOL = 0.4V | 3 | ||
| Input leakage current, SCL | IIL | -1 | 1 | A | SCL | 3 | |
| Output current when OFF, SDA, /INTA, /INTB | IOZ | -1 | 1 | A | SDA, /INTA, /INTB | 3 | |
| Timekeeping current | ICCTOSC | 450 | 800 | nA | VCC = 1.3~1.8V, TA = -40 °C to +85 °C; Note 2, 4, 5 | 4 | |
| Data retention current | ICCTDDR | 160 | nA | VCC = 1.3~1.8V, TA = -40 °C to +85 °C; Note 2, 4, 5, 6 | 4 | ||
| Active supply current | ICCA | 100 | A | VCC = 1.8~3.6V, TA = -40 °C to +85 °C; Note 1, 5 | 4 | ||
| Standby current | ICCS | 0.6 | 1 | A | VCC = 1.8~3.6V, TA = -40 °C to +85 °C; Note 2, 3, 5 | 4 | |
| Active supply current | ICCA | 150 | A | VCC = 3.6~5.5V, TA = -40 °C to +85 °C; Note 1, 5 | 4 | ||
| Standby current | ICCS | 1 | 1.8 | A | VCC = 3.6~5.5V, TA = -40 °C to +85 °C; Note 2, 3, 5 | 4 | |
| SCL clock frequency | fSCL | 400 | kHz | Over the operating range | 6 | ||
| START condition set-up time | tSU;STA | 0.6 | s | Over the operating range | 6 | ||
| START condition hold time | tHD;STA | 0.6 | s | Over the operating range | 6 | ||
| Data set-up time (RTC read/write) | tSU;DAT | 200 | ns | Over the operating range | 6 | ||
| Data hold time (RTC write) | tHD;DAT1 | 35 | ns | Over the operating range | 6 | ||
| Data hold time (RTC read) | tHD;DAT2 | 0 | s | Over the operating range | 6 | ||
| STOP condition setup time | tSU;STO | 0.6 | s | Over the operating range | 6 | ||
| Bus idle time between START and STOP condition | tBUF | 1.3 | s | Over the operating range | 6 | ||
| Low period of SCL | tLOW | 1.3 | s | Over the operating range; SCL = L | 6 | ||
| High period of SCL | tHIGH | 0.6 | s | Over the operating range; SCL = H | 6 | ||
| Rise time for SCL and SDA | tr | 0.3 | s | Over the operating range | 6 | ||
| Fall time for SCL and SDA | tf | 0.3 | s | Over the operating range | 6 | ||
| Allowable spike time on bus | tSP | 50 | ns | Over the operating range; only reference for design | 6 | ||
| Capacitance load for each bus line | CB | 400 | pF | Over the operating range | 6 | ||
| I/O capacitance (SDA, SCL) | CI/O | 10 | pF | Over the operating range; only reference for design | 6 | ||
| Oscillator Stop Flag (OSF) delay | TOSF | 100 | ms | Over the operating range | 6 |
CAD (KiCad official)
- Symbol:
PT7C4337UEX - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
pt7c4337uex-etched.step/pt7c4337uex-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pt7c4337uex.step/pt7c4337uex.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (24 pp, sha256
c18685ac8d8626c9, retrieved 2026-10-18, 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).