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AR1100-I

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Microchip Tech Touch Sensors, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AR1100-I

Microchip Tech · Touch Sensors · SSOP-20-208mil

AR1100-I 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 VDD power_in Positive power supply pin.
2 OSC1 input Oscillator pin 1 (oscillator connection).
3 OSC2 output Oscillator pin 2 (oscillator connection).
4 MODE input Sensor mode select: GND selects 5-wire, open selects 4-/8-wire.
5 LED output LED control pin.
6 (Y+) passive Sensor connection; not used (n/a) for 4-wire and 5-wire, Y+ for 8-wire sensors.
7 X+ passive Sensor connection.
8 SY- passive Sensor connection.
9 SX+ passive Sensor connection.
10 UART-TX output UART transmit data.
11 WAKE input Wake pin.
12 UART-RX input UART receive data.
13 SX- passive Sensor connection; n/a for 4-wire, WSX for 5-wire, SX- for 8-wire sensors.
14 X- passive Sensor connection.
15 Y+(SY+) passive Sensor connection; Y+ for 4-wire and 5-wire, SY+ for 8-wire sensors.
16 Y- passive Sensor connection.
17 VUSB passive USB internal voltage reference.
18 USB-D- bidirectional USB data I/O (D-).
19 USB-D+ bidirectional USB data I/O (D+).
20 VSS power_in Ground.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SSOP-20-208mil
Category Sensors
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
Operating voltage VDD 3.3 5 V 3.3-5.0V +/- 5% 3
Ambient temperature under bias -40 85 °C 39
Storage temperature -65 150 °C 39
Voltage on VDD with respect to VSS VDD -0.3 6.5 V 39
Voltage on all other pins with respect to VSS -0.3 V -0.3V to (VDD + 0.3V) 39
Total power dissipation 800 mW 39
Maximum current out of VSS pin 300 mA 39
Maximum current into VDD pin 250 mA 39
Input clamp current 20 mA VI < 0 or VI > VDD 39
Maximum output current sunk by any I/O pin 25 mA 39
Maximum output current sourced by any I/O pin 25 mA 39
Standby current (UART) 10 uA UART, <10 uA 3
Standby current (USB) 325 uA USB, <325 uA 3
Operating current (no touch) 17 mA no touch 3
Operating current (touch) 25 mA touch 3
Lead-to-lead resistance (touch sensor) 50 2000 Ohm 3
Layer-to-layer capacitance (touch sensor) 0 0.5 uF 3
Touch coordinate report rate 150 reports per second typ.; results vary slightly with sensor 3

CAD (KiCad official)

  • Symbol: AR1100-I
  • Footprint: Package_SO:SSOP-20_5.3x7.2mm_P0.65mm
  • 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
  • 3D model files: ar1100-i-etched.step / ar1100-i-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ar1100-i.step / ar1100-i.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (58 pp, sha256 f314bf0e177b68ac, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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