CY8CMBR2044_12 CYPRESS [Cypress Semiconductor], CY8CMBR2044_12 Datasheet

CY8CMBR2044_12

Manufacturer Part Number

CY8CMBR2044_12

Description

Manufacturer

CYPRESS [Cypress Semiconductor]

Datasheet

1.CY8CMBR2044_12.pdf (29 pages)

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Four Button CapSense

Features

■

Cypress Semiconductor Corporation

Document Number: 001-57451 Rev. *E

Note

1. Power consumption calculated with 1.7% touch time, 500 ms scan rate, and C

Easy to use capacitive button controller

❐

Robust noise performance

❐

SmartSense™ Auto-Tuning

❐

System Diagnostics of CapSense buttons - reports any faults

at device power up

❐

Advanced features

❐

Wide operating voltage range

❐

Low power consumption

❐

Industrial temperature range: –40 °C to + 85 °C

16-pad

(3 mm × 3 mm × 0.6 mm)

Four-button solution configurable through Hardware straps

No software tools or programming required

Four general-purpose outputs (GPOs)

GPOs linked to CapSense

GPOs support direct LED drive

Specifically designed for superior noise immunity to external

radiated and conducted noise

Low radiated noise emission

Saves time and effort in device tuning

CapSense parameters dynamically set in runtime

Maintains optimal button performance even in noisy

environment

Wide parasitic capacitance C

Button shorted to Ground

Button shorted to V

Button to button short

Improper value of modulator capacitor (C

Parasitic capacitance (C

Toggle ON/OFF feature on GPOs

Flanking Sensor Suppression (FSS) provides robust sensing

even with closely spaced buttons

Configurable LED ON time after button release

Button output reset if touched for excessive time

User-controlled Button Scan Rate

Serial Debug Data output

• Simplifies production line testing and system debug

1.71 V to 5.5 V – ideal for both regulated and unregulated

battery applications

Supply current in run mode as low as 15 µA

Deep sleep current: 100 nA

Controller

quad

flat

) out of range

buttons

range (5 pF–40 pF)

leads

•

(QFN)

MOD

198 Champion Court

[1]

)

per button

package

Four Button CapSense

of each sensor < 19 pF.

Overview

The CY8CMBR2044 incorporates several innovative features to

save time and money to quickly enable a capacitive touch

sensing user interface in your design. It is a hardware

configurable device and does not require any software tools or

coding. This device is enabled with Cypress's revolutionary

SmartSense™

Auto-Tuning ends the need to manually tune the user interface

during development and production ramp. This speeds the time

to volume and saves valuable engineering time, test time and

production yield loss.

The CY8CMBR2044 CapSense controller supports up to four

capacitive touch sensing buttons and four General Purpose

Outputs (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 applications. The wide

operating range of 1.71 V to 5.5 V enables unregulated battery

operation, further saving component cost. Also, the same device

can be used in different applications with different power

supplies, including low power supplies.

This device supports ultra low-power consumption in both run

mode and deep sleep mode to stretch battery life. In addition,

this device also supports many advanced features which

enhance the robustness and user interface of the end solution.

Some of the key advanced features include Noise Immunity and

FSS. Noise Immunity improves the immunity of the device

against radiated and conducted noise, such as audio and radio

frequency (RF) noise. FSS provides robust sensing even with

closely spaced buttons. FSS is a critical requirement in small

form factor applications.

Serial Debug Data output gives the critical information about the

design, such as button Cp and Signal-to-Noise Ratio (SNR). This

further helps in production line testing.

•

San Jose

Auto-Tuning

CA 95134-1709

algorithm.

CY8CMBR2044

Revised May 22, 2012

Controller

•

SmartSense™

408-943-2600

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