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MELFAS

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We introduce you to MELFAS, a leading touch input solution market company.

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  • Product Information

    MMS - Melfas Mutual Solution

     

     

    ■ Product Information

     

    Capacitance-type touch screen is the input device which generates two-dimensional contact information by detecting the changed capacitance by the contact of the human body. The capacitance is generated when there are two conductive materials physically. The basic structure of the capacitance-type touch screen is the touch screen sensing electrode pattern, which embodies one conductor and the contacting part of the human body such as a finger plays a role of another conductor.

     

    Touch Screen device is the one which generates the contacting location by detecting the capacitance which varies according to whether the human body contact exists or not. According to the driving principle which generates the change of the capacitance, it’s categorized by two sensing methods. First is the Self capacitance sensing method which is that the change of the voltage is measured by charging/discharging the electric-charge itself. The second is the Mutual capacitance sensing which is that the voltage which is delivered to the Rx Channel is measured for Tx driving signals.


    According to the driving method, the form and the structure of the sensing pattern is determined as well, which comprises 2-layer diamond pattern, 1-layer triangle pattern, 2-layer bar pattern and etc. They are the representative structures of the Touch Screen.

     


     

    The signals generated from the chips by the sensing method are delivered to the contacted part through the electrode of the Touch Screen. The two-dimensional location information which is generated using the capacitance’s change from the touching is basically determined by the ratio of the capacitance between the electrodes neighboring each other which exist on the contacted parts. Along with this, to remove the approval of the circuit or the external noise or the contact information generated by the un-intended touch, the filtering technology is used to make the stable contact information.


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    ■ Product Features 

     

    1st-generation MMS-series (mutual 2-Layer)

    • 32bit MCU-embedded capacitive sensing IC development

    • Capacitance-type touch key/Touch Screen IC development

    • Improvement of the function and performance such as the low power consumption, 

     the faster report rate, multi-touch support, and so on.

     

    [ Main Features ]

     Sensing Channel     : 28/36/44/52channel

     Package Type     : QFN, BGA

     Operating Voltage    : 2.5V ~ 3.6V

     Internal Block     : MCU, FlashMemory, ROM, ISP Interface, WDT, GPIO

                    C sensing circuit, ADC, I2C Interface, ESD protection circuit,

                    Internal Clock, LED driving circuit, external interrupt,

                    Internal LDO regulator, Internal level-shifter

     Interface        : I2C Interface with Interrupt type

     Supporting Function  : Capacitive touch key sensing, mechanical key sensing, 16 level LED control,

                    Capacitive touch screen sensing (coordination calculation), ISP(In-system

                    programming)

     

     

    2nd-generation MMS-series (mutual 1-Layer)

    • 32-bit MCU-embedded capacitive sensing IC development
    • Capacitance-type touch key/Touch Screen IC development
    • Improvement of the function and performance such as the low power consumption,

     the faster report rate, multi-touch support, and so on
    • Support of Wakeup gesture and the large-inches application

     

     

    [ Main Features ]

     Sensing Channel     : 27/38/49/58/92channel

     Package Type     : QFN, BGA

     Operating Voltage    : 2.5V ~ 3.6V

     Internal Block      : MCU, Flash Memory, SRAM, ISC Interface, WDT, GPIO

                    C sensing circuit, ADC, I2C Interface, ESD protection circuit,

                    Internal Clock, external interrupt

                    Internal LDO regulator, Internal level-shifter

     Interface        : I2C Interface with Interrupt type

     Supporting Function  : Capacitive touch key sensing, mechanical key sensing, 

                    Capacitive touch screen sensing (coordination calculation),

                    ISC(In-system configuration)


    3rd-generation MMS-series (Hybrid 1-Layer and 2-Layer)

    • 32-bit MCU-embedded capacitive sensing IC development
    • Capacitance-type touch key/Touch Screen IC developmen
    • Improvement of the function and performance such as the low power consumption, 

     the faster report rate, multi-touch support, and so on
    • Hybrid sensing(Self/Mutual) and Hover sensing support

     

    [ Main Features ]

     Sensing Channel   : 49/56/80 channel

     Package Type    QFN, BGA

     Operating Voltage : 2.5V ~ 3.6V

     Internal Block   : MCU, Flash Memory, SRAM, ISC Interface, WDT, GPIO

     

     

  • Applicable Models

    ■ MMS - 1st generation

     

     MMS-126S MMS-128S MMS-134S MMS-128
    Package Size BGA 36ld 3.2㎜ x 3.2㎜, 0.67T, 0.5pitch
    26 Channel Sensing Electrodes
    I2C serial ISP

    Package Size QFN 40ld 5㎜ x 5㎜ x 0.55T
    28 Channel Sensing Electrodes
    I2C serial ISP

    Package Size QFN 44ld 5㎜ x 5㎜ x 0.45T, 0.35 pitch
    34 Channel Sensing Electrodes
    I2C serial ISP
     Package Size UQFN :  5.0㎜ x 5.0㎜, 0.55T
     RX 10ch, TX 18ch
     interface : I2C


    MMS-136 MMS-144 MMS-152 MMS-224
    Package Size QFN 44ld 5㎜ x 5㎜ x 0.55T
     0.35pitch, 36 Channel Sensing Electrodes
     I2C serial ISP

     Package Size UQFN :  6.0㎜ x 6.0㎜, 0.5T 0.35 pitch
     RX 18ch, TX 26ch
     interface : I2C


     Package Size UQFN : 6.0㎜ x 6.0㎜, 0.6 0.6T,  0.5 pitch
     RX 20ch, TX 32ch
     interface : I2C

     Package Size UQFN :  56ld 6.0㎜ x 6.0㎜,  0.6 0.5T, 0.35pitch
     44 Channel Sensing Electrodes
     interface : I2C
    MMS-252 MMS-345L
     Package Size BGA : 5.0㎜ x 5.0㎜, 0.6T, 0.5pitch
     Channel : RX 20ch, TX 32ch
     interface : I2C
     Package Size UQFN : 6.0㎜ x 6.0㎜, 0.45T, 0.35pitch
     Channel : TX 27ch,  RX 18ch
     interface : I2C

     

     

     

    ■ MMS - 2nd generation

     

    MMS-438 MMS-449 MMS-458 MMS-427
     Package Size UQFN :  5.0㎜ x 5.0㎜, 0.5
     Channel : TX24ch, RX14ch interface : I2C
     Package Size UQFN : 6.0㎜ x 6.0㎜, 0.5
     Channel : TX31ch, RX18ch interface : I2C
     Package Size BGA :  5.0㎜ x 5.0㎜, 0.6
     Channel : TX38ch, RX20ch interface : I2C
     Package Size UQFN :  4.0 x 4.0, 45
     Channel : TX12ch, RX15ch interface : I2C



    ■ MMS - 3rd generation

     

    MMS-548 MMS-556 MOS-50F
     Package Size QFN 60ld 6x6x0.55T Channel : TX 18ch , RX 30ch interface : I2C  Package Size UQFN :  5.5㎜ x 5.5㎜, 0.6㎜ Channel : TX 22ch , RX 34ch interface : I2C  Package Size BGA 120-ball 10x5.5x0.7T, 0.65mm pitch Channel : TX 28ch, RX 59ch interface : I2C, SPI

     

  • Applicable Products

    • Samsung Galaxy Note II (1st generation)

    • Samsung Galaxy S3 (1st generation)

    • Samsung Galaxy Grand Lite (1st generation)

    • Samsung Galaxy Gear (1st generation)

    • Samsung Galaxy J1 Ace (2st generation)

    • Samsung Galaxy J7 (2st generation)

    • Samsung Galaxy A5 (2st generation)

    • Samsung Galaxy A8 (2st generation)

    • Samsung Galaxy C7 (2st generation)

    • Samsung Galaxy A9 (2st generation)

    • Samsung Galaxy C9 (3st generation)

    • Samsung Galaxy C7 Pro (2st generation)

    • Samsung Galaxy A7 (2st generation)

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