                                   SK8707-01 FlexPoint™ Pointing Stick Mouse Module
                                       Compact, 3 Axis PS/2 Low Power Z-Tap CellMute™ Technology

FEATURES                                                DESCRIPTION
▪   Low cost and space saving mouse solution            The SK8707-01 compact FlexPoint™ pointing
▪   3 connection methods: FFC connector, FFC solder     stick module is a cost-effective, space-saving
    pads, and board-to-board castellated pins           PS/2 mouse device deploying a Sprintek
▪   Integrated or detached control board                advanced pointing stick controller.
▪   Typical 2.4mm stem and height-adjustable M2
    screw stem                                          The SK8707-01’s sensor deploys two types of
▪   Two types of metal plate options                    stems: 2.4x2.4x2.4mm sqare prism stick in
▪   Z-Tap algorithm to simulate left button click,      SK8707-01-001 / 002 / 003 / 004 and height-
    double click and drag                               adjustable M2 screw stick in SK8707-01-005 /
▪   CellMute™ technology filters the wireless EMI       006 / 007. The height of the M2 screw stick in
    noise from cellular phones and wireless networks    SK8707-01-005 / 006 / 007 can be adjustable
▪   Works with standard Windows® mouse drivers          from 9.5mm to 27.5mm using mating standoffs.
▪   Works with Lenovo TrackPoint® drivers
▪   Low power consumption. 650uA (idle), 2.09 mA        The SK8707-01-008 deploys diamond metal
    (operation) under 3.3V; 890uA (idle), 2.76 mA       plate; and this design is good for tight space
    (operation) under 5V                                applications.
▪   3.05V to 5.25V operating voltage. Other operating
    voltage is available upon request                   Typically, consuming 650uA in idle state, the
▪   Temperature range: -40°C to +85°C                   SK8707-01 is ideal for battery-operated
                                                        systems.
APPLICATION
                                                        Deploying CellMute™ technology and patented
▪   Notebooks/Laptops
                                                        signal conditioning circuit to filter the wireless
▪   Handhelds
                                                        EMI noise from cellular phones and wireless
▪   Keyboards
                                                        networks, the SK8707-01 modules can work
▪   Instrumentation
                                                        quietly in wireless environment.

                                                        The SK8707-01 FlexPoint™ module partially
                                                        implements the Lenovo TrackPoint® extended
                                                        command protocol and can work with Lenovo
                                                        TrackPoint® device drivers directly.


MODULE PICTURES
                     TOP VIEW                                            BOTTOM VIEW




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    SK8707-01-001 / SK8707-01-002                         SK8707-01-005 / 006 /007




                 SK8707-01-003                                  SK8707-01-004




                 SK8707-01-008                                  SK8707-01-010




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                            SK8707-01 Compact FlexPoint™ 3 Axis PS/2 Pointing Stick Module Datasheet

ORDEING INFORMATION
SK8707-01-001 (5V,2.4x2.4x2.4mm square prism stick, integrated) Pb-Free, RoHS
SK8707-01-002 (3.3V,2.4x2.4x2.4mm square prism stick, integrated) Pb-Free, RoHS
SK8707-01-003 (3.3V,2.4x2.4x2.4mm square prism stick, detached with metal plate) Pb-Free, RoHS
SK8707-01-004 (3.3V,2.4x2.4x2.4mm square prism stick, detached without metal plate) Pb-Free, RoHS
SK8707-01-005 (3.3V,11.5mm M2 screw stick, integrated) Pb-Free, RoHS
SK8707-01-006 (3.3V,9.5mm M2 screw stick, integrated) Pb-Free, RoHS
SK8707-01-007 (3.3V,16.5mm M2 screw stick, integrated) Pb-Free, RoHS
SK8707-01-008 (3.3V,9.9mm M2 screw stick, detached with diamond metal plate) Pb-Free, RoHS
SK8707-01-010 (3.3V,11.5mm M2 screw stick, detached with metal plate) Pb-Free, RoHS

CONNECTION DEFINITION

Method 1: Board-to-board Castellated Pins
 Pin No   Type      Name           Description
 1        P         GND            Ground
 2        IO        IPD DATA       PS/2 data line
 3        IO        IPD CLK        PS/2 clock line
 4        I         IPD RST        Reset. Active high external reset with internal pull down.
 5        P         VCC            Power supply
 6        IO        LEFT           Left button
 7        IO        MIDDLE         Middle button
 8        IO        RIGHT          Right button
LENGENG P = Power, I = Input, O = Output, IO = Input/Output

Method 2: 8-pin 1mm Pitch FFC Cable Soldering Pads (Top)
 Pin No   Type      Name           Description
 1        IO        IPD DATA       PS/2 data line
 2        I         IPD RST        Reset. Active high external reset with internal pull down.
 3        IO        MIDDLE         Middle button
 4        IO        RIGHT          Right button
 5        IO        LEFT           Left button
 6        IO        IPD CLK        PS/2 clock line
 7        P         GND            Ground
 8        P         VCC            Power supply
LENGENG P = Power, I = Input, O = Output, IO = Input/Output

Method 3: 8-pin 1mm Pitch FFC Connector / FFC Cable Soldering Pads (Bottom)
 Pin No   Type      Name           Description
 1        IO        IPD DATA       PS/2 data line
 2        I         IPD RST        Reset. Active high external reset with internal pull down.
 3        IO        MIDDLE         Middle button
 4        IO        RIGHT          Right button
 5        IO        LEFT           Left button
 6        IO        IPD CLK        PS/2 clock line
 7        P         GND            Ground
 8        P         VCC            Power supply
LENGENG P = Power, I = Input, O = Output, IO = Input/Output



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APPLICATION NOTES

                                               Method 2 (1mm FFC connection pads) ’s Pin1




                                               Method 1 (castellated pins) ’s Pin1




                                              Method 3 (8-pin 1mm Connector) ’s Pin1




3 Connection Methods
There are 3 connection methods.
Method 1: Board-to-board castellated pins. The method can be used to solder the module to the host
board directly or wire the module to the host board via individual wires or FPC.
Method 2: FFC connection pads at top side. The method can be used to solder FFC / FPC cable directly
to the board.
Method 3: 8 pin 1mm FFC connector at bottom side. An 8-pin 1mm pitch connector (not installed) can be
used for the footprint. A connector / FFC cable can be installed upon request.


Height-adjustable M2 screw stick of SK8707-01-005
The SK8707-01-005 model deploys a M2 screw stick with 11.5mm height. A 4mm
or longer M2 spacer screw standoff can be used to adjust the total height from
11.5mm. Sprintek provides such M2 standoffs fitting with Sprintek rubber caps.
The SK8707-01-006 deploys a M2 screw stick with 9.5mm height, The SK8707-
01-007 deploys a M2 screw stick with 16.5mm height.


Height-adjustable M2 screw stick of SK8707-01-008 with diamond metal plate
The SK8707-01-008 model deploys a M2 screw stick with 10mm height. A 3mm
or longer M2 spacer screw standoff can be used to adjust the total height from
10mm. Sprintek provides such M2 standoffs fitting with Sprintek rubber caps.




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                                 SK8707-01 Compact FlexPoint™ 3 Axis PS/2 Pointing Stick Module Datasheet

Communication Protocol and Hardware Interface
SK8707-01 simulates standard PS/2 mouse and follows its command protocol. The host needs pull-up
resistors on PS/2 DATA and CLK lines. The built-in pullup resistors from the host 4k to 100k are
acceptable. Float RESET pin if you don’t plan to control the reset timing. A capacitor and a pull-down
resistor (typical 0.1uF and 10k) on the RESET line can be used to control the RESET timing.



ELECTRONICS SPECIFICATIOIN
Absolute Maximum Ratings
Symbol   Description                                   Min    Typ    Max     Units   Notes
TSTG     Storage Temperature                           -55    -      +100    ºC
VDD      Supply Voltage on Relative to VSS             -0.5   -      +6.0    V
ESD      Electro Static Discharge Voltage              2000   -      -       V       Human Body Model ESD



Operating Temperature
Symbol   Description                                   Min    Typ    Max     Units   Notes
TOP      Operating Temperature                         -40    -      +85     ºC



DC Electrical Characteristics （5V）
Symbol   Description                                   Min    Typ    Max     Units   Notes
VDD      Supply Voltage                                4.1    -      +5.25   V
IOP      Supply Current when module is in operation           2.76           mA
         mode
IIDLEZ   Supply Current when module is in idle mode           1.94           mA
         with Z-Tap enabled
IIDLE    Supply Current when module is in idle mode           890            uA
         with Z-Tap disabled
ISD      Supply Current when module is in power down          40             uA
         mode
RPU      Pull-up Resistor                              4      5.6    8       kΩ
VPOR     Power on reset voltage                               2.92           V


DC Electrical Characteristics （3.3V）
Symbol   Description                                   Min    Typ    Max     Units   Notes
VDD      Supply Voltage                                3.05   -      +5.25   V
IOP      Supply Current when module is in operation           2.09           mA
         mode
IIDLEZ   Supply Current when module is in idle mode           1.44           mA
         with Z-Tap enabled
IIDLE    Supply Current when module is in idle mode           650            uA
         with Z-Tap disabled
ISD      Supply Current when module is in power down          40             uA
         mode
RPU      Pull-up Resistor                              4      5.6    8       kΩ
VPOR     Power on reset voltage                               2.92           V




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                          SK8707-01 Compact FlexPoint™ 3 Axis PS/2 Pointing Stick Module Datasheet

MECHANICAL SPECIFICATIOIN




                     SK8707-01 Module Mechanical Drawing (Unit in mm)

                   TOP VIEW                                       SIDE VIEW




                  SK8707-01 Sensor PCB Mechanical Drawing (Unit in mm)




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                          SK8707-01 Compact FlexPoint™ 3 Axis PS/2 Pointing Stick Module Datasheet




                   SK8707-01-005 Sensor Mechanical Drawing (Unit in mm)




                   SK8707-01-008 Sensor Mechanical Drawing (Unit in mm)


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                               SK8707-01 Compact FlexPoint™ 3 Axis PS/2 Pointing Stick Module Datasheet

SALE AND SERVICE INFORMATION
To obtain information about Sprintek Corporation or pointing stick product sales and technical support,
reference the following information.

Sprintek Corporation
4969 Corral Street
Simi Valley, CA 93063, USA
Web Site: http://www.sprintek.com


REVISION HISTORY
Revision     Issue Date                 Description
1.00         March 16, 2021             Initial Release
1.01         November 29, 2023          Updated new released modules, which added FFC connectors,
                                        FFC soldering pads; updated mechanical drawing.
1.02         January 25, 2025           Updated mechanical drawing
1.03         June 3, 2025               Added SK8707-01-005 (3.3V,11.5mm M2 screw stick, integrated)
                                        Added SK8707-01-008 (3.3V,9.9mm M2 screw stick, detached
                                        with diamond metal plate)
1.04         March 30, 2026             Added SK8707-01-003 (3.3V,2.4x2.4x2.4mm square prism stick,
                                        detached with metal plate)
                                        Added SK8707-01-006 (3.3V,9.5mm M2 screw stick, integrated)
                                        Added SK8707-01-007 (3.3V,16.5mm M2 screw stick, integrated)
                                        Added SK8707-01-010 (3.3V,11.5mm M2 screw stick, detached
                                        with metal plate)
                                        Updated SK8707-01-008 mechanical drawing




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