
ADBv2
mattchesters/zmk-apple-desktop-bus-keyboard
ZMK shield for Apple Desktop Bus Keyboard

The MCP23017-E/SS is an i, O Expander made by Microchip Technology in a SSOP-28(5.3x10.2x0.65) package with 28 pins. -40℃~+125℃ 1.7MHz 1.8V~5.5V 16 1uA 600mV 8 8mA I2C Interrupt Output Reset function、Cascading and address extension SSOP-28 I/O Expanders ROHS.
PCBKit's library has its KiCad symbol (Analog & Interface:MCP23017-E/SS, from CERN's library) and its footprint (Package_SO:SSOP-28_5.3x10.2mm_P0.65mm, from KiCad's library), ready for a KiCad board. 3,425 are in stock at JLCPCB (part C558584). 161 open-source boards in 97 repositories on GitHub use it.
| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Ambient temperature under bias | min -40 · max 125 °C | 3 | |
| Storage temperature | min -65 · max 150 °C | 3 | |
| Voltage on VDD with respect to VSS | min -0.3 · max 5.5 V | 3 | |
| Voltage on all other pins with respect to VSS (except VDD) | Maximum = VDD + 0.6V | min -0.6 V | 3 |
| Total power dissipation | max 700 mW | 3 | |
| Maximum current out of VSS pin | max 150 mA | 3 | |
| Maximum current into VDD pin | max 125 mA | 3 | |
| Input clamp current IIK | VI < 0 or VI > VDD; ±20 mA | max 20 mA | 3 |
| Output clamp current IOK | VO < 0 or VO > VDD; ±20 mA | max 20 mA | 3 |
| Maximum output current sunk by any output pin | max 25 mA | 3 | |
| Maximum output current sourced by any output pin | max 25 mA | 3 | |
| ESD protection on all pins (HBM:MM) | HBM | max 4 kV | 3 |
| ESD protection on all pins (HBM:MM) | MM | max 400 V | 3 |
| Supply Voltage VDD | min 1.8 · max 5.5 V | 4 | |
| VDD Rise Rate to ensure Power-on Reset SVDD | Design guidance only. Not tested. | min 0.05 V/ms | 4 |
| Supply Current IDD | SCL/SCK = 1 MHz | max 1 mA | 4 |
| Standby current IDDS8 | –40°C ≤ TA ≤ +85°C | max 1 uA | 4 |
| Standby current IDDS8 | 4.5V ≤ VDD ≤ 5.5V; +85°C ≤ TA ≤ +125°C; characterized, not 100% tested | max 3 uA | 4 |
| I/O port pins IIL | Input Leakage Current; VSS ≤ VPIN ≤ VDD; ±1 uA | max 1 uA | 4 |
| I/O port pins ILO | Output Leakage Current; VSS ≤ VPIN ≤ VDD; ±1 uA | max 1 uA | 4 |
| GPIO weak pull-up current IPU | VDD = 5V; GP pins = VSS | min 40 · typ 75 · max 115 uA | 4 |
| GPIO VOL | Output Low-Voltage; IOL = 8.0 mA; VDD = 4.5V | max 0.6 V | 4 |
| INT VOL | Output Low-Voltage; IOL = 1.6 mA; VDD = 4.5V | max 0.6 V | 4 |
| SO, SDA VOL | Output Low-Voltage; SDA for MCP23017; IOL = 3.0 mA; VDD = 1.8V | max 0.6 V | 4 |
| SDA VOL | Output Low-Voltage; IOL = 3.0 mA; VDD = 4.5V | max 0.8 V | 4 |
| GPIO, SO, INT CIO | Capacitive Loading Specs on Output Pins; GPIO, INT for MCP23017 | max 50 pF | 4 |
| SDA CB | Capacitive Loading Specs on Output Pins | max 400 pF | 4 |
| RESET Pulse Width (Low) TRSTL | min 1 us | 5 | |
| Device Active After Reset high THLD | VDD = 5.0V; characterized, not 100% tested | typ 0 ns | 5 |
| Output High-Impedance From RESET Low TIOZ | max 1 us | 5 |
| Pin | Name | Type |
|---|---|---|
| 1 | GPB0 | Input/output |
| 2 | GPB1 | Input/output |
| 3 | GPB2 | Input/output |
| 4 | GPB3 | Input/output |
| 5 | GPB4 | Input/output |
| 6 | GPB5 | Input/output |
| 7 | GPB6 | Input/output |
| 8 | GPB7 | Input/output |
| 9 | VDD | Power in |
| 10 | VSS | Power in |
| 11 | NC | Passive |
| 12 | SCL | Input |
| 13 | SDA | Input/output |
| 14 | NC | Passive |
| 15 | A0 | Input |
| 16 | A1 | Input |
| 17 | A2 | Input |
| 18 | RESET | Input |
| 19 | INTB | Output |
| 20 | INTA | Output |
| 21 | GPA0 | Input/output |
| 22 | GPA1 | Input/output |
| 23 | GPA2 | Input/output |
| 24 | GPA3 | Input/output |
| 25 | GPA4 | Input/output |
| 26 | GPA5 | Input/output |
| 27 | GPA6 | Input/output |
| 28 | GPA7 | Input/output |

mattchesters/zmk-apple-desktop-bus-keyboard
ZMK shield for Apple Desktop Bus Keyboard

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ktec-hq/ErgoDone
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djbristow/RAILS
RAILS is a software model and implementation of an automated system to assist the model railroader achieve realism in the operation of a model railroad. The model then drives the development of software.



<iframe src="https://pcbkit.io/embed/parts/microchip/MCP23017-E/SS" title="MCP23017-E/SS in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/microchip/MCP23017-E/SS.jpg" alt="MCP23017-E/SS" width="1200" height="900">[](https://pcbkit.io/parts/microchip/MCP23017-E/SS)Yes. The symbol is Analog & Interface:MCP23017-E/SS and the footprint Package_SO:SSOP-28_5.3x10.2mm_P0.65mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
SSOP-28(5.3x10.2x0.65), with 28 pins. Its footprint is drawn on this page.
Microchip Technology publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C558584, with 3,425 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the MCP23017-E/SO by Microchip Technology, the MCP23008-E/SS by Microchip Technology, the MCP23008-E/ML by Microchip Technology and the MCP23017-E/SP by Microchip Technology. Check their datasheets: a part that fits the footprint may still differ in its ratings.
161 boards in 97 repositories on GitHub; the most starred are listed on this page, with their KiCad files.