component
MCP23008-E
Public Made by Adomby adom
Microchip Tech I/O Expanders, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownMCP23008-E
Microchip Tech · I/O Expanders · SSOP-20-208mil
MCP23008-E from Microchip Tech, in a SSOP-20-208mil. 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 | SCL/SCK | input | Serial clock input for the I2C (MCP23008) or SPI (MCP23S08) interface. |
| 2 | SDA/SI | bidirectional | Serial data I/O for MCP23008 (I2C) or serial data input for MCP23S08 (SPI). |
| 3 | A2/SO | bidirectional | Hardware address input (MCP23008) or serial data output (MCP23S08); A2 must be biased externally. |
| 4 | A1 | input | Hardware address input that must be biased externally. |
| 5 | A0 | input | Hardware address input that must be biased externally. |
| 6 | RESET | input | External reset input that must be biased externally. |
| 7 | NC/CS | input | No connect on the MCP23008; external chip select input on the MCP23S08. |
| 8 | INT | output | Interrupt output that can be configured as active-high, active-low or open-drain. |
| 9 | VSS | power_in | Ground reference for the device. |
| 10 | N/C | unconnected | No connect pin on the SSOP package. |
| 11 | N/C | unconnected | No connect pin on the SSOP package. |
| 12 | GP0 | bidirectional | Bidirectional I/O pin that can be enabled for interrupt-on-change and/or an internal weak pull-up resistor. |
| 13 | GP1 | bidirectional | Bidirectional I/O pin that can be enabled for interrupt-on-change and/or an internal weak pull-up resistor. |
| 14 | GP2 | bidirectional | Bidirectional I/O pin that can be enabled for interrupt-on-change and/or an internal weak pull-up resistor. |
| 15 | GP3 | bidirectional | Bidirectional I/O pin that can be enabled for interrupt-on-change and/or an internal weak pull-up resistor. |
| 16 | GP4 | bidirectional | Bidirectional I/O pin that can be enabled for interrupt-on-change and/or an internal weak pull-up resistor. |
| 17 | GP5 | bidirectional | Bidirectional I/O pin that can be enabled for interrupt-on-change and/or an internal weak pull-up resistor. |
| 18 | GP6 | bidirectional | Bidirectional I/O pin that can be enabled for interrupt-on-change and/or an internal weak pull-up resistor. |
| 19 | GP7 | bidirectional | Bidirectional I/O pin that can be enabled for interrupt-on-change and/or an internal weak pull-up resistor. |
| 20 | VDD | power_in | Power supply pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SSOP-20-208mil |
| Category | Interface |
| Pins | 20 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Ambient temperature under bias | -40 | 125 | °C | 23 | |||
| Storage temperature | -65 | 150 | °C | 23 | |||
| Voltage on VDD with respect to VSS | -0.3 | 5.5 | V | 23 | |||
| Voltage on all other pins with respect to VSS (except VDD) | -0.6 | V | max printed as (VDD + 0.6V) | 23 | |||
| Maximum current out of VSS pin | 150 | mA | 23 | ||||
| Maximum current into VDD pin | 125 | mA | 23 | ||||
| Input clamp current | IIK | -20 | 20 | mA | VI < 0 or VI > VDD | 23 | |
| Output clamp current | IOK | -20 | 20 | mA | VO < 0 or VO > VDD | 23 | |
| Operating supply voltage, I-Temp range | VDD | 1.8 | 5.5 | V | -40°C ≤ TA ≤ +85°C (I-Temp) | 24 | |
| Operating supply voltage, E-Temp range | VDD | 4.5 | 5.5 | V | -40°C ≤ TA ≤ +125°C (E-Temp) (Note 1) | 24 | |
| Operating ambient temperature, I-Temp range | TA | -40 | 85 | °C | 1.8V ≤ VDD ≤ 5.5V (I-Temp) | 24 | |
| Operating ambient temperature, E-Temp range | TA | -40 | 125 | °C | 4.5V ≤ VDD ≤ 5.5V (E-Temp) (Note 1) | 24 | |
| Supply Voltage | VDD | 1.8 | 5.5 | V | 24 | ||
| VDD Rise Rate to Ensure Power-on Reset | SVDD | 0.05 | V/ms | Design guidance only. Not tested. | 24 | ||
| Supply Current | IDD | 1 | mA | SCL/SCK = 1 MHz | 24 | ||
| Standby current | IDDS | 1 | µA | 24 | |||
| Standby current | IDDS | 2 | µA | 4.5V - 5.5V @ +125°C (Note 1) | 24 | ||
| Input leakage current, I/O port pins | IIL | -1 | 1 | µA | VSS ≤ VPIN ≤ VDD | 24 | |
| Output leakage current, I/O port pins | ILO | -1 | 1 | µA | VSS ≤ VPIN ≤ VDD | 24 | |
| GPIO weak pull-up current | IPU | 40 | 75 | 115 | µA | VDD = 5V, GP Pins = VSS; -40°C ≤ TA ≤ +85°C | 24 |
| Output Low-Voltage, GPIO | VOL | 0.6 | V | IOL = 8.5 mA, VDD = 4.5V | 24 | ||
| Output Low-Voltage, INT | VOL | 0.6 | V | IOL = 1.6 mA, VDD = 4.5V | 24 | ||
| Output Low-Voltage, SO and SDA | VOL | 0.6 | V | IOL = 3.0 mA, VDD = 1.8V | 24 | ||
| Output Low-Voltage, SDA | VOL | 0.8 | V | IOL = 3.0 mA, VDD = 4.5V | 24 | ||
| Capacitive loading, GPIO, SO, INT pins | CIO | 50 | pF | 24 | |||
| Capacitive loading, SDA pin | CB | 400 | pF | 24 | |||
| RESET Pulse Width (Low) | TRSTL | 1 | µs | 26 | |||
| Output High-Impedance From RESET Low | TIOZ | 1 | µs | 26 | |||
| Clock High Time, 100 kHz mode | THIGH | 4 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 1.8V, 5.5V (I-Temp) | 27 | ||
| Clock High Time, 400 kHz mode | THIGH | 0.6 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 2.7V, 5.5V (I-Temp) | 27 | ||
| Clock High Time, 1.7 MHz mode | THIGH | 0.12 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 4.5V, 5.5V (E-Temp) | 27 | ||
| Clock Low Time, 100 kHz mode | TLOW | 4.7 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 1.8V, 5.5V (I-Temp) | 27 | ||
| Clock Low Time, 400 kHz mode | TLOW | 1.3 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 2.7V, 5.5V (I-Temp) | 27 | ||
| Clock Low Time, 1.7 MHz mode | TLOW | 0.32 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 4.5V, 5.5V (E-Temp) | 27 | ||
| SDA and SCL Rise Time, 100 kHz mode | TR | 1000 | ns | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 1.8V, 5.5V (I-Temp) (Note 1) | 27 | ||
| SDA and SCL Rise Time, 400 kHz mode | TR | 300 | ns | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 2.7V, 5.5V (I-Temp) (Note 1) | 27 | ||
| SDA and SCL Rise Time, 1.7 MHz mode | TR | 20 | 160 | ns | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 4.5V, 5.5V (E-Temp) (Note 1) | 27 | |
| Data Input Hold Time, 100 kHz mode | THD:DAT | 0 | 3.45 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 1.8V, 5.5V (I-Temp) | 27 | |
| Data Input Hold Time, 400 kHz mode | THD:DAT | 0 | 0.9 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 2.7V, 5.5V (I-Temp) | 27 | |
| Data Input Hold Time, 1.7 MHz mode | THD:DAT | 0 | 0.15 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 4.5V, 5.5V (E-Temp) | 27 | |
| Data Input Setup Time, 100 kHz mode | TSU:DAT | 250 | ns | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 1.8V, 5.5V (I-Temp) | 27 | ||
| Data Input Setup Time, 400 kHz mode | TSU:DAT | 100 | ns | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 2.7V, 5.5V (I-Temp) | 27 | ||
| Data Input Setup Time, 1.7 MHz mode | TSU:DAT | 0.01 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 4.5V, 5.5V (E-Temp) | 27 | ||
| Output Valid From Clock (TAA), 100 kHz mode | TAA | 3.45 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 1.8V, 5.5V (I-Temp) | 28 | ||
| Output Valid From Clock (TAA), 400 kHz mode | TAA | 0.9 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 2.7V, 5.5V (I-Temp) | 28 | ||
| Output Valid From Clock (TAA), 1.7 MHz mode | TAA | 0.18 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 4.5V, 5.5V (E-Temp) | 28 | ||
| Bus Free Time, 100 kHz mode | TBUF | 4.7 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 1.8V, 5.5V (I-Temp) | 28 | ||
| Bus Free Time, 400 kHz mode | TBUF | 1.3 | µs | RPU (SCL, SDA) = 1 kΩ, CL (SCL, SDA) = 135 pF; 2.7V, 5.5V (I-Temp) | 28 | ||
| Bus Capacitive Loading, 100 kHz and 400 kHz | CB | 400 | pF | (Note 1) | 28 | ||
| Bus Capacitive Loading, 1.7 MHz | CB | 100 | pF | (Note 1) | 28 | ||
| Serial data to output valid | TGPOV | 500 | ns | 31 | |||
| Interrupt pin disable time | TINTD | 600 | ns | 31 | |||
| GP input change to register valid | TGPIV | 450 | ns | 31 | |||
| IOC event to INT active | TGPINT | 600 | ns | 31 | |||
| Glitch Filter on GP Pins | TGLITCH | 150 | ns | 31 |
CAD (KiCad official)
- Symbol:
MCP23008-E - Footprint:
Package_SO:SSOP-20_5.3x7.2mm_P0.65mm - 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
- 3D model files:
mcp23008-e-etched.step/mcp23008-e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp23008-e.step/mcp23008-e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (44 pp, sha256
573ae3991f57d129, 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).