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CAP1188-1-CP-TR

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Microchip Tech Touch Sensors, QFN-24-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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CAP1188-1-CP-TR

Microchip Tech · Touch Sensors · QFN-24-EP(4x4)

CAP1188-1-CP-TR from Microchip Tech, in a QFN-24-EP(4x4). 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 SPI_CS# input Active low chip-select for the SPI bus, 5V tolerant digital input; connect to ground when unused and ground it when SMBus/I2C communications are used.
2 WAKE/SPI_MOSI bidirectional WAKE is an active-high wake/interrupt output in Standby (needs pull-down resistor) and a wake input in Deep Sleep, or SPI_MOSI master-out-slave-in input (5V tolerant) in normal SPI mode.
3 SMDATA/SPI_MSIO/SPI_MISO bidirectional SMBus bidirectional open-drain data (5V tolerant, needs pull-up resistor), SPI bidirectional MSIO port, or SPI_MISO push-pull output in normal SPI mode.
4 SMCLK/SPI_CLK input SMBus clock input (needs pull-up resistor) or SPI clock input, 5V tolerant digital input.
5 LED1 output LED 1 driver, open drain (default, 5V tolerant, needs pull-up; connect to ground if unused) or push-pull (leave open or connect to ground if unused).
6 LED2 output LED 2 driver, open drain (default, 5V tolerant, needs pull-up; connect to ground if unused) or push-pull (leave open or connect to ground if unused).
7 LED3 output LED 3 driver, open drain (default, 5V tolerant, needs pull-up; connect to ground if unused) or push-pull (leave open or connect to ground if unused).
8 LED4 output LED 4 driver, open drain (default, 5V tolerant, needs pull-up; connect to ground if unused) or push-pull (leave open or connect to ground if unused).
9 LED5 output LED 5 driver, open drain (default, 5V tolerant, needs pull-up; connect to ground if unused) or push-pull (leave open or connect to ground if unused).
10 LED6 output LED 6 driver, open drain (default, 5V tolerant, needs pull-up; connect to ground if unused) or push-pull (leave open or connect to ground if unused).
11 LED7 output LED 7 driver, open drain (default, 5V tolerant, needs pull-up; connect to ground if unused) or push-pull (leave open or connect to ground if unused).
12 LED8 output LED 8 driver, open drain (default, 5V tolerant, needs pull-up; connect to ground if unused) or push-pull (leave open or connect to ground if unused).
13 ALERT# output Active-low open-drain alert/interrupt output for SMBus alert or SPI interrupt (needs pull-up, default), or active-high push-pull when configured so.
14 ADDR_COMM input Address/communications select analog input; the pull-down resistor value determines the address and communications mechanism.
15 CS8 bidirectional Capacitive touch sensor input 8 (analog I/O); connect to ground if unused.
16 CS7 bidirectional Capacitive touch sensor input 7 (analog I/O); connect to ground if unused.
17 CS6 bidirectional Capacitive touch sensor input 6 (analog I/O); connect to ground if unused.
18 CS5 bidirectional Capacitive touch sensor input 5 (analog I/O); connect to ground if unused.
19 CS4 bidirectional Capacitive touch sensor input 4 (analog I/O); connect to ground if unused.
20 CS3 bidirectional Capacitive touch sensor input 3 (analog I/O); connect to ground if unused.
21 CS2 bidirectional Capacitive touch sensor input 2 (analog I/O); connect to ground if unused.
22 CS1 bidirectional Capacitive touch sensor input 1 (analog I/O); connect to ground if unused.
23 VDD power_in Positive power supply, 3.0 V to 3.6 V (3.3 V typical).
24 RESET input Active-high soft reset for the system that resets all registers to default values, 5V tolerant; connect to ground if unused.
25 GND power_in Ground, exposed bottom pad.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package QFN-24-EP(4x4)
Category Sensors
Pins 25

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Voltage on 5V tolerant pins V5VT_PIN -0.3 5.5 V 9
Voltage on 5V tolerant pins (/V5VT_PIN - VDD/) 0 3.6 V Note 3-2 9
Voltage on VDD pin -0.3 4 V 9
Operating Ambient Temperature Range -40 125 °C 9
Storage Temperature Range -55 150 °C 9
ESD Rating, All Pins, HBM 8000 V 9
Package Power Dissipation 0.9 W up to TA = 85°C for 24 pin QFN 9
Junction to Ambient (JA) JA 58 °C/W Note 3-4 9
Voltage on any other pin to GND -0.3 V 9
Supply Voltage VDD 3 3.3 3.6 V 10
Supply Current (Standby, default conditions) ISTBY 120 170 uA Standby state active; 1 sensor input monitored; No LEDs active; Default conditions (8 avg, 70ms cycle time) 10
Supply Current (Standby, 1 avg, 140ms cycle time) ISTBY 50 uA Standby state active; 1 sensor input monitored; No LEDs active; 1 avg, 140ms cycle time 10
Supply Current (Deep Sleep) IDSLEEP 5 15 uA Deep Sleep state active; LEDs at 100% or 0% Duty Cycle; No communications; TA < 40°C 10
Supply Current (Capacitive Sensing Active) IDD 500 600 uA 3.135 < VDD < 3.465V; Capacitive Sensing Active; No LEDs active 10
Maximum Base Capacitance CBASE 50 pF Pad untouched 10
Minimum Detectable Capacitive Shift CTOUCH 20 fF Pad touched - default conditions (1 avg, 35ms cycle time, 1x sensitivity) 10
Recommended Cap Shift CTOUCH 0.1 2 pF Pad touched - Not tested 10
Power Supply Rejection PSR 3 10 counts / V 10
Duty Cycle DUTYLED 0 100 % Programmable 10
Leakage Current ILEAK -5 5 uA powered or unpowered; TA < 85°C; pull-up voltage < 3.6V if unpowered 10
Output Low Voltage VOL 0.4 V ISINK_IO = 8mA 10
Time to first conversion ready tCONV_DLY 170 200 ms 10
RESET Pin Delay tRST_DLY 10 ms 10
Time to communications ready tCOMM_DLY 15 ms 10
Drive Frequency fLED 2 kHz 10
Sinking Current ISINK 24 mA VOL = 0.4 10
Sourcing Current ISOURCE 24 mA VOH = VDD - 0.4 10

CAD (KiCad official)

  • Symbol: CAP1188-1-CP-TR
  • Footprint: Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm
  • 3D model: QFN-24-EP(4x4) (KiCad packages3D, STEP)
  • 3D model files: cap1188-1-cp-tr-etched.step / cap1188-1-cp-tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cap1188-1-cp-tr.step / cap1188-1-cp-tr.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (79 pp, sha256 91dec09f1eace3f8, retrieved 2026-11-07, tier: lcsc)
  • 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