(Hong Kong)
Product Summary
The AT42QT23C01-MU is a QMatrix Sensor IC designed for use with up to 16 keys and a slider (constructed from 2 keys up to 8 keys). There are three dedicated General Purpose Input/Outputs (GPIOs) which can be used as inputs for mechanical switches etc. or as driven outputs. There are eight shared General Purpose Outputs (GPOs) (X0 to X7) which are driven outputs only. There is PWM control for all GPIO/GPOs. The AT42QT23C01-MU technology employs transverse charge-transfer sensing electrode designs which can be made very compact and are easily wired.
Parametrics
AT42QT23C01-MU absolute maximum ratings: (1)Vdd: -0.5 to +6V; (2)Max continuous pin current, any control or drive pin: ±10 mA; (3)Short circuit duration to ground, any pin: infinite; (4)Short circuit duration to Vdd, any pin: infinite; (5)Voltage forced onto any pin: -0.6V to (Vdd + 0.6) Volts.
Features
AT42QT23C01-MU features: (1)Number of keys: up to 16 keys, and one slider (constructed from 2 to 8 keys); (2)Number of I/O lines: 11 (3 dedicated - configurable for input or output, 8 shared - output only), PWM control for LED driving; (3)Technology: patented spread-spectrum charge-transfer (transverse mode); (4)Key outline sizes: 6 mm x 6 mm or larger (panel thickness dependent); widely different sizes and shapes possible; (5)Key spacings: 8 mm or wider, center to center (panel thickness dependent); (6)Slider design: 2 to 8 keys placed in sequence, same design as keys; (7)Electrode design: two-part electrode shapes (drive-receive); wide variety of possible layouts; (8)PCB layers required: one layer (with jumpers), two layers (no jumpers); (9)Electrode materials: PCB, FPCB, silver or carbon on film, ITO on film; (10)Panel materials: plastic, glass, composites, painted surfaces (low particle density metallic paints possible); (11)Adjacent metal: compatible with grounded metal immediately next to keys; (12)Panel thickness: up to 3 mm glass, 2.5 mm plastic (key size dependent); (13)Key sensitivity: individually settable via simple commands over I2C-compatible interface; (14)Interface: I2C-compatible slave mode (100kHz); (15)Moisture tolerance: best in class; (16)Power: 1.8 V to 5.5 V; (17)Package: 28-pin 4 x 4 mm MLF RoHS compliant; (18)Signal processing: self-calibration, auto drift compensation, noise filtering, Adjacent Key SuppressionTM technology; (19)Applications: laptop, mobile, consumer appliances, PC peripheral etc; (20)Patents: AKS (patented Adjacent Key Suppression technology; (21)QMatrix (patented charge-transfer method) QSlide (patented charge-transfer method) (patent-pending QSlide sensing configuration).
Diagrams
