AT42QT2161-MMU Atmel, AT42QT2161-MMU Datasheet - Page 5

• Manufacturer Part Number: AT42QT2161-MMU
• Description: IC TOUCH SENSOR 16KEY QFN M-MOD
• Manufacturer: Atmel
• Type: Capacitiver

Specifications of AT42QT2161-MMU

• Touch Panel Interface: 8, 2-Wire
• Number Of Inputs/keys: 16 Key, Slider
• Resolution (bits): 10 b
• Data Interface: I²C, Serial
• Voltage Reference: Internal
• Voltage - Supply: 1.8 V ~ 5.5 V
• Current - Supply: 1.14mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2. Overview
2.1
9614A–AT42–08/10
Introduction
Figure 1-2.
The AT42QT2161-MMU (QT2161) is a digital burst mode charge-transfer (QT
sensor designed specifically for matrix layout touch controls. It can use up to 16
keys and a slider (constructed from 2 – 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 – X7) which are driven outputs only. There is PWM control for
all GPIO/GPOs.
QMatrix
electrical charge forced across two electrode elements by a pulse edge (see
Figure
Inputs/Outputs
2-1). The QT2161 allows a wide range of key sizes and shapes to be mixed.
®
employs transverse QT sensing, a technology that senses changes in
AT42QT2161
™
5
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