component
MCP79410-I
Public Made by Adomby adom
Microchip Tech Real Time Clocks, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MCP79410-I
Microchip Tech · Real Time Clocks · SOIC-8
MCP79410-I from Microchip Tech, in a SOIC-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 | Quartz crystal input for the 32.768 kHz oscillator, optimized for crystals with 6-9 pF load capacitance, and also the external clock input when the device is configured for an external oscillator. |
| 2 | X2 | output | Quartz crystal output for the 32.768 kHz oscillator, used with external load capacitors matched to the selected crystal. |
| 3 | VBAT | power_in | Backup supply input that maintains the RTCC and SRAM registers while VCC is unavailable; connect to VSS if battery backup is not used. |
| 4 | VSS | power_in | Ground reference for the device. |
| 5 | SDA | bidirectional | Open-drain I2C serial data line that requires a pull-up to VCC (typically 10 kΩ for 100 kHz, 2 kΩ for 400 kHz) and may change only while SCL is low, except for Start and Stop conditions. |
| 6 | SCL | input | I2C serial clock input that synchronizes data transfer to and from the device. |
| 7 | MFP | output | Open-drain multifunction output for alarm, square-wave or general-purpose output, requiring a pull-up to VCC (typically 10 kΩ) and which may be left floating if unused. |
| 8 | VCC | power_in | Primary power supply input for the device. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-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 |
|---|---|---|---|---|---|---|---|
| High-Level Input Voltage | VIH | 0.7 | VCC | 3 | |||
| Low-Level Input Voltage | VIL | 0.3 | VCC | VCC ≥ 2.5V | 3 | ||
| Low-Level Input Voltage | VIL | 0.2 | VCC | VCC < 2.5V | 3 | ||
| Hysteresis of Schmitt Trigger Inputs (SDA, SCL pins) | VHYS | 0.05 | VCC | Note 1 | 3 | ||
| Low-Level Output Voltage (MFP, SDA pins) | VOL | 0.4 | V | IOL = 3.0 mA; VCC = 4.5V | 3 | ||
| Input Leakage Current | ILI | -1 | 1 | µA | VIN = VSS or VCC | 3 | |
| Output Leakage Current | ILO | -1 | 1 | µA | VOUT = VSS or VCC | 3 | |
| Pin Capacitance (SDA, SCL, MFP pins) | CIN, COUT | 10 | pF | VCC = 5.0V (Note 1) | 3 | ||
| EEPROM Operating Current (read) | ICCEERD | 400 | µA | VCC = 5.5V, SCL = 400 kHz | 3 | ||
| EEPROM Operating Current (write) | ICCEEWR | 3 | mA | VCC = 5.5V | 3 | ||
| SRAM/RTCC Register Operating Current | ICCREAD, ICCWRITE | 300 | µA | VCC = 5.5V, SCL = 400 kHz | 3 | ||
| SRAM/RTCC Register Operating Current | ICCREAD, ICCWRITE | 400 | µA | VCC = 5.5V, SCL = 400 kHz | 3 | ||
| VCC Data-Retention Current (oscillator off) | ICCDAT | 1 | µA | SCL, SDA, VCC = 5.5V | 3 | ||
| Power-Fail Switchover Voltage | VTRIP | 1.3 | 1.5 | 1.7 | V | 3 | |
| Backup Supply Voltage Range | VBAT | 1.3 | 5.5 | V | Note 1 | 3 | |
| Timekeeping Backup Current | IBATT | 850 | nA | VBAT = 1.3V, VCC = VSS (Note 1) | 3 | ||
| Timekeeping Backup Current | IBATT | 925 | 1200 | nA | VBAT = 3.0V, VCC = VSS (Note 1) | 3 | |
| Timekeeping Backup Current | IBATT | 9000 | nA | VBAT = 5.5V, VCC = VSS (Note 1) | 3 | ||
| VBAT Data Retention Current (oscillator off) | IBATDAT | 750 | nA | VBAT = 3.6V, VCC = VSS | 4 | ||
| Clock Frequency | FCLK | 100 | kHz | 1.8V ≤ VCC < 2.5V | 5 | ||
| Clock Frequency | FCLK | 400 | kHz | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| Clock High Time | THIGH | 4000 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| Clock High Time | THIGH | 600 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| Clock Low Time | TLOW | 4700 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| Clock Low Time | TLOW | 1300 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| SDA and SCL Rise Time (Note 1) | TR | 1000 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| SDA and SCL Rise Time (Note 1) | TR | 300 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| SDA and SCL Fall Time (Note 1) | TF | 1000 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| SDA and SCL Fall Time (Note 1) | TF | 300 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| Start Condition Hold Time | THD:STA | 4000 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| Start Condition Hold Time | THD:STA | 600 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| Start Condition Setup Time | TSU:STA | 4700 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| Start Condition Setup Time | TSU:STA | 600 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| Data Input Hold Time | THD:DAT | 0 | ns | Note 3 | 5 | ||
| Data Input Setup Time | TSU:DAT | 250 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| Data Input Setup Time | TSU:DAT | 100 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| Stop Condition Setup Time | TSU:STO | 4000 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| Stop Condition Setup Time | TSU:STO | 600 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| Output Valid from Clock | TAA | 3500 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| Output Valid from Clock | TAA | 900 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| Bus Free Time | TBUF | 4700 | ns | 1.8V ≤ VCC < 2.5V | 5 | ||
| Bus Free Time | TBUF | 1300 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 | ||
| Input Filter Spike Suppression (SDA and SCL pins) | TSP | 50 | ns | Note 1 | 5 | ||
| Write Cycle Time (byte or page) | TWC | 5 | ms | 5 | |||
| VCC Fall Time | TFVCC | 300 | µs | Note 1 | 5 | ||
| VCC Rise Time | TRVCC | 0 | µs | Note 1 | 5 | ||
| Oscillator Timeout Period | TOSF | 1 | ms | Note 1 | 5 | ||
| Endurance | 1 | M cycles | Page Mode, 25°C, VCC = 5.5V (Note 2) | 5 | |||
| Timekeeping Current | ICCT | 1.2 | µA | VCC = 3.3V (Note 1) | 3 | ||
| Supply Voltage (VCC) operating range, industrial | VCC | 1.8 | 5.5 | V | Industrial (I) | 3 | |
| Operating Ambient Temperature, industrial | TA | -40 | 85 | °C | Industrial (I) | 3 | |
| VCC Supply Voltage (absolute maximum) | VCC | 6.5 | V | 3 | |||
| All inputs and outputs (except SDA and SCL) w.r.t. VSS | -0.6 | V | w.r.t. VSS; upper limit printed as VCC + 1.0V (not expressible as a number) | 3 | |||
| SDA and SCL w.r.t. VSS | -0.6 | 6.5 | V | w.r.t. VSS | 3 | ||
| Storage Temperature | -65 | 150 | °C | 3 | |||
| Ambient Temperature with power applied | -40 | 125 | °C | 3 | |||
| ESD protection on all pins | 4 | kV | Printed as ≥4 kV | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | 8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] A A2 | 47 |
CAD (KiCad official)
- Symbol:
MCP79410-I - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
mcp79410-i-etched.step/mcp79410-i-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp79410-i.step/mcp79410-i.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (66 pp, sha256
65cd1b1f847753fc, 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).
# MCP79410-I
**Microchip Tech** · Real Time Clocks · SOIC-8
MCP79410-I from Microchip Tech, in a SOIC-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 | Quartz crystal input for the 32.768 kHz oscillator, optimized for crystals with 6-9 pF load capacitance, and also the external clock input when the device is configured for an external oscillator. |
| 2 | X2 | output | Quartz crystal output for the 32.768 kHz oscillator, used with external load capacitors matched to the selected crystal. |
| 3 | VBAT | power_in | Backup supply input that maintains the RTCC and SRAM registers while VCC is unavailable; connect to VSS if battery backup is not used. |
| 4 | VSS | power_in | Ground reference for the device. |
| 5 | SDA | bidirectional | Open-drain I2C serial data line that requires a pull-up to VCC (typically 10 kΩ for 100 kHz, 2 kΩ for 400 kHz) and may change only while SCL is low, except for Start and Stop conditions. |
| 6 | SCL | input | I2C serial clock input that synchronizes data transfer to and from the device. |
| 7 | MFP | output | Open-drain multifunction output for alarm, square-wave or general-purpose output, requiring a pull-up to VCC (typically 10 kΩ) and which may be left floating if unused. |
| 8 | VCC | power_in | Primary power supply input for the device. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOIC-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 |
|---|---|---|---|---|---|---|---|
| High-Level Input Voltage | VIH | 0.7 | | | VCC | | 3 |
| Low-Level Input Voltage | VIL | | | 0.3 | VCC | VCC ≥ 2.5V | 3 |
| Low-Level Input Voltage | VIL | | | 0.2 | VCC | VCC < 2.5V | 3 |
| Hysteresis of Schmitt Trigger Inputs (SDA, SCL pins) | VHYS | 0.05 | | | VCC | Note 1 | 3 |
| Low-Level Output Voltage (MFP, SDA pins) | VOL | | | 0.4 | V | IOL = 3.0 mA; VCC = 4.5V | 3 |
| Input Leakage Current | ILI | -1 | | 1 | µA | VIN = VSS or VCC | 3 |
| Output Leakage Current | ILO | -1 | | 1 | µA | VOUT = VSS or VCC | 3 |
| Pin Capacitance (SDA, SCL, MFP pins) | CIN, COUT | | | 10 | pF | VCC = 5.0V (Note 1) | 3 |
| EEPROM Operating Current (read) | ICCEERD | | | 400 | µA | VCC = 5.5V, SCL = 400 kHz | 3 |
| EEPROM Operating Current (write) | ICCEEWR | | | 3 | mA | VCC = 5.5V | 3 |
| SRAM/RTCC Register Operating Current | ICCREAD, ICCWRITE | | | 300 | µA | VCC = 5.5V, SCL = 400 kHz | 3 |
| SRAM/RTCC Register Operating Current | ICCREAD, ICCWRITE | | | 400 | µA | VCC = 5.5V, SCL = 400 kHz | 3 |
| VCC Data-Retention Current (oscillator off) | ICCDAT | | | 1 | µA | SCL, SDA, VCC = 5.5V | 3 |
| Power-Fail Switchover Voltage | VTRIP | 1.3 | 1.5 | 1.7 | V | | 3 |
| Backup Supply Voltage Range | VBAT | 1.3 | | 5.5 | V | Note 1 | 3 |
| Timekeeping Backup Current | IBATT | | | 850 | nA | VBAT = 1.3V, VCC = VSS (Note 1) | 3 |
| Timekeeping Backup Current | IBATT | | 925 | 1200 | nA | VBAT = 3.0V, VCC = VSS (Note 1) | 3 |
| Timekeeping Backup Current | IBATT | | | 9000 | nA | VBAT = 5.5V, VCC = VSS (Note 1) | 3 |
| VBAT Data Retention Current (oscillator off) | IBATDAT | | | 750 | nA | VBAT = 3.6V, VCC = VSS | 4 |
| Clock Frequency | FCLK | | | 100 | kHz | 1.8V ≤ VCC < 2.5V | 5 |
| Clock Frequency | FCLK | | | 400 | kHz | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Clock High Time | THIGH | 4000 | | | ns | 1.8V ≤ VCC < 2.5V | 5 |
| Clock High Time | THIGH | 600 | | | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Clock Low Time | TLOW | 4700 | | | ns | 1.8V ≤ VCC < 2.5V | 5 |
| Clock Low Time | TLOW | 1300 | | | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| SDA and SCL Rise Time (Note 1) | TR | | | 1000 | ns | 1.8V ≤ VCC < 2.5V | 5 |
| SDA and SCL Rise Time (Note 1) | TR | | | 300 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| SDA and SCL Fall Time (Note 1) | TF | | | 1000 | ns | 1.8V ≤ VCC < 2.5V | 5 |
| SDA and SCL Fall Time (Note 1) | TF | | | 300 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Start Condition Hold Time | THD:STA | 4000 | | | ns | 1.8V ≤ VCC < 2.5V | 5 |
| Start Condition Hold Time | THD:STA | 600 | | | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Start Condition Setup Time | TSU:STA | 4700 | | | ns | 1.8V ≤ VCC < 2.5V | 5 |
| Start Condition Setup Time | TSU:STA | 600 | | | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Data Input Hold Time | THD:DAT | 0 | | | ns | Note 3 | 5 |
| Data Input Setup Time | TSU:DAT | 250 | | | ns | 1.8V ≤ VCC < 2.5V | 5 |
| Data Input Setup Time | TSU:DAT | 100 | | | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Stop Condition Setup Time | TSU:STO | 4000 | | | ns | 1.8V ≤ VCC < 2.5V | 5 |
| Stop Condition Setup Time | TSU:STO | 600 | | | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Output Valid from Clock | TAA | | | 3500 | ns | 1.8V ≤ VCC < 2.5V | 5 |
| Output Valid from Clock | TAA | | | 900 | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Bus Free Time | TBUF | 4700 | | | ns | 1.8V ≤ VCC < 2.5V | 5 |
| Bus Free Time | TBUF | 1300 | | | ns | 2.5V ≤ VCC ≤ 5.5V | 5 |
| Input Filter Spike Suppression (SDA and SCL pins) | TSP | | | 50 | ns | Note 1 | 5 |
| Write Cycle Time (byte or page) | TWC | | | 5 | ms | | 5 |
| VCC Fall Time | TFVCC | 300 | | | µs | Note 1 | 5 |
| VCC Rise Time | TRVCC | 0 | | | µs | Note 1 | 5 |
| Oscillator Timeout Period | TOSF | 1 | | | ms | Note 1 | 5 |
| Endurance | | 1 | | | M cycles | Page Mode, 25°C, VCC = 5.5V (Note 2) | 5 |
| Timekeeping Current | ICCT | | 1.2 | | µA | VCC = 3.3V (Note 1) | 3 |
| Supply Voltage (VCC) operating range, industrial | VCC | 1.8 | | 5.5 | V | Industrial (I) | 3 |
| Operating Ambient Temperature, industrial | TA | -40 | | 85 | °C | Industrial (I) | 3 |
| VCC Supply Voltage (absolute maximum) | VCC | | | 6.5 | V | | 3 |
| All inputs and outputs (except SDA and SCL) w.r.t. VSS | | -0.6 | | | V | w.r.t. VSS; upper limit printed as VCC + 1.0V (not expressible as a number) | 3 |
| SDA and SCL w.r.t. VSS | | -0.6 | | 6.5 | V | w.r.t. VSS | 3 |
| Storage Temperature | | -65 | | 150 | °C | | 3 |
| Ambient Temperature with power applied | | -40 | | 125 | °C | | 3 |
| ESD protection on all pins | | 4 | | | kV | Printed as ≥4 kV | 3 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | 8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC] A A2 | 47 |
## CAD (KiCad official)
- Symbol: `MCP79410-I`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `mcp79410-i-etched.step` / `mcp79410-i-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mcp79410-i.step` / `mcp79410-i.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Microchip Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893154611777536) (66 pp, sha256 `65cd1b1f847753fc`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/mcp79410-i-datasheet.pdf)