CY8CMBR2044 Datasheet, PDF (1/26 Pages) Cypress Semiconductor – Capacitive Button Controllers

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CY8CMBR2044
Capacitive Button Controllers
Capacitive Button Controllers
Features
■ Easiest to use capacitive button controller
❐ Hardware configurable 4-button solution
❐ No software tools or programming required
❐ General purpose outputs (GPO) support direct LED drive
■ Robust noise performance
❐ High sensitivity, low noise capacitive sensing algorithm
❐ Strong immunity to radio frequency (RF) and alternating 
current (AC) noise
❐ Low radiated noise emission
■ SmartSense™ auto tuning
❐ No manual tuning required (reduces time to market)
❐ All CapSense^® parameters are automatically set in runtime
❐ Ensures signal to noise ratio (SNR) of 5:1 or greater
❐ Supports wide range of input capacitance (5 pF to 40 pF)
■ Advanced features
❐ Toggle feature on GPO
❐ Flanking sensor suppression (FSS) provides robust sensing
even with closely spaced sensors
❐ Delay Off feature (configurable LED run time)
❐ Easier production line testing
• Serial data out for debug
• Failure mode analysis of CapSense buttons
■ Wide operating range
❐ 1.71 V to 5.5 V ideal for unregulated battery applications
■ Low power consumption
❐ Supply current in run mode as low as 15 µA^[1] for every button
❐ Deep sleep current: 100 nA
■ Industrial temperature range: –40 °C to + 85 °C
■ 16-pad quad flat no leads (QFN) package (3 mm x 3 mm x
0.6 mm)
Overview
The CY8CMBR2044 incorporates several innovative features to
save time, money, and can quickly enable a capacitive touch
sensing UI in your next design. It does not require any software
tools or coding because system configuration is done using
hardware. These features enable a broader audience of
designers to implement capacitive buttons without learning new
tool sets and developing code. In addition, this device is enabled
with Cypress’s revolutionary SmartSense auto tuning algorithm.
SmartSense ends the need to manually tune the UI during devel-
opment as well as the required retuning during production ramp.
This saves valuable engineering time, test time, production yield
loss, and speeds the time to volume.
The CY8CMBR2044 CapSense controller supports up to four
capacitive sensing buttons and four GPOs. The GPO is an active
low output controlled directly by the CapSense input making it
ideal for a wide variety of consumer, industrial, and medical appli-
cations. The wide operating range of 1.71 V to 5.5 V enables
unregulated battery operation, further saving component cost.
This device supports ultra low power consumption in run mode
as well as deep sleep modes to enhance battery life. In addition
to this, the device also supports many advanced features which
enhance the robustness and user interface of the end solution.
Some of the key advanced features include FSS, which provides
robust sensing even with closely spaced sensors. This is a
critical requirement in small form factor applications. Another key
feature is failure mode analysis that helps ease production line
testing and reduces manufacturing costs.
Note
1. Power consumption calculated with 1.7% touch time, 500 ms scan rate, and C_P of each sensor < 19 pF.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 001-57451 Rev. *C
• San Jose, CA 95134-1709 • 408-943-2600
Revised July 29, 2010
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