CY8CMBR2044 Four Button CapSense Controller Four Button CapSense Controller Features Functional Description Easy to use capacitive button controller The CY8CMBR2044 incorporates several innovative features to save time and money to quickly enable a capacitive touch Four-button solution configurable through Hardware straps sensing user interface in your design. It is a hardware No software tools or programming required configurable device and does not require any software tools or Four general-purpose outputs (GPOs) coding. This device is enabled with Cypresss revolutionary GPOs linked to CapSense buttons SmartSense Auto-Tuning algorithm. SmartSense GPOs support direct LED drive Auto-Tuning ends the need to manually tune the user interface during development and production ramp. This speeds the time Robust noise performance to volume and saves valuable engineering time, test time and Specifically designed for superior noise immunity to external production yield loss. radiated and conducted noise Low radiated noise emission The CY8CMBR2044 CapSense controller supports up to four capacitive touch sensing buttons and four General Purpose SmartSense Auto-Tuning Outputs (GPOs). The GPO is an active low output controlled Saves time and effort in device tuning directly by the CapSense input making it ideal for a wide variety CapSense parameters dynamically set in runtime of consumer, industrial, and medical applications. The wide Maintains optimal button performance even in noisy operating range of 1.71 V to 5.5 V enables unregulated battery environment operation, further saving component cost. Also, the same device Wide parasitic capacitance C range (5 pF40 pF) P can be used in different applications with different power supplies, including low power supplies. System Diagnostics of CapSense buttons - reports any faults at device power up This device supports ultra low-power consumption in both run mode and deep sleep mode to stretch battery life. In addition, Button shorted to Ground this device also supports many advanced features which Button shorted to V DD enhance the robustness and user interface of the end solution. Button to button short Some of the key advanced features include Noise Immunity and Improper value of modulator capacitor (C ) MOD FSS. Noise Immunity improves the immunity of the device Parasitic capacitance (C ) out of range P against radiated and conducted noise, such as audio and radio Advanced features frequency (RF) noise. FSS provides robust sensing even with closely spaced buttons. FSS is a critical requirement in small Toggle ON/OFF feature on GPOs form factor applications. Flanking Sensor Suppression (FSS) provides robust sensing even with closely spaced buttons Serial Debug Data output gives the critical information about the Configurable LED ON time after button release design, such as button Cp and Signal-to-Noise Ratio (SNR). This Button output reset if touched for excessive time further helps in production line testing. User-controlled Button Scan Rate Serial Debug Data output Simplifies production line testing and system debug Wide operating voltage range 1.71 V to 5.5 V ideal for both regulated and unregulated battery applications Low power consumption 1 Supply current in run mode as low as 15 A per button Deep sleep current: 100 nA Industrial temperature range: 40 C to + 85 C 16-pad quad flat no leads (QFN) package (3 mm 3 mm 0.6 mm) Note 1. Power consumption calculated with 1.7% touch time, 500 ms scan rate, and C of each sensor < 19 pF. P Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-57451 Rev. *J Revised March 4, 2019CY8CMBR2044 Contents Pinout ................................................................................3 Recommended Via Hole Placement ......................... 16 Typical Circuits .................................................................4 Example PCB Layout Design with Four Schematic 1: 4-Buttons, 4-LEDs CapSense Buttons and Four LEDs ........................... 17 with Auto Reset Enabled .............................................4 Electrical Specifications ................................................ 18 Schematic 2: 3-Buttons, 3-LEDs, 2-Outputs Absolute Maximum Ratings .......................................18 to Master, and Advanced Features Enabled ...............5 Operating Temperature ............................................. 18 Configuring the CY8CMBR2044 ......................................6 DC Electrical Characteristics ..................................... 19 Device Features ................................................................6 AC Electrical Specifications ....................................... 21 CapSense Buttons ......................................................6 CapSense Specifications .......................................... 21 SmartSense Auto Tuning ............................................6 Ordering Information ...................................................... 22 General Purpose Outputs ............................................6 Ordering Code Definitions ......................................... 22 Toggle ON/OFF ...........................................................7 Package Diagram ............................................................ 23 Flanking Sensor Suppression (FSS) ...........................7 Package Information ................................................. 23 LED ON Time ..............................................................7 Appendix ......................................................................... 24 Button Auto Reset .......................................................8 Acronyms ........................................................................ 26 System Diagnostics .....................................................9 Document Conventions ................................................. 26 Serial Debug Data .....................................................10 Units of Measure ....................................................... 26 Power Consumption and Device Operating Document History Page ................................................. 27 Modes ........................................................................12 Sales, Solutions, and Legal Information ...................... 29 Additional Components to Enable Advanced Worldwide Sales and Design Support ....................... 29 Features ....................................................................14 Products .................................................................... 29 Response Time .........................................................14 PSoC Solutions ...................................................... 29 Layout Guidelines and Best Practices .........................15 Cypress Developer Community ................................. 29 CapSense Button Shapes .........................................16 Technical Support ..................................................... 29 Button Layout Design ................................................16 Document Number: 001-57451 Rev. *J Page 2 of 29