MX8731A Datasheet – USB/PS2 Optical Mouse Sensor
USB/PS2 Single Chip Optical Mouse Sensor
MX8731A overview
The MX8731A is a USB/PS2 Single Chip Optical Mouse Sensor, supplied in an SOP 16 Pin Type package. The absolute maximum ratings table on this page lists the 4 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the MX8731A pinout and maximum ratings, with the full datasheet PDF to preview below or download.
The MX8731/31A chip is a low cost single chip optical mouse solution used to implement a non-mechanical tracking engine for computer mice. It is based on optical navigation technology with USB/PS2 combo MCU bundled. Which measures changes in position by optically acquiring sequential surface images(frames) and mathematically determining the direction and magnitude of movement.
The single chip optical mouse sensor provides a complete and compact mouse solution, There are no moving parts, and precision optical alignment is not required, few outside components use and facilitate high volume assembly. It is a true crystal-less and ultra low cost solution.
Datasheet
MX8731A features
- Optical Navigation Technology
- Low-cost and powerful solution for PS/2 and low-speed USB combo mouse
- Microsoft 3D Intellimouse and IBM PS/2 mouse compatible
- Internal switch for USB DP/DM and PS2 CLK/Data I/O
- Universal Serial Bus Specification, version 2.0
- USB HID Specification, version 1.1
- Compatible whit Windows7, Windows Vista, WindowsXP, Windows2000, Windows ME, Windows98, MAC OS,Cent OS and Linux
- USB-IF and WHQL compliable
- 5V Power Supply
- Power Saving During No Motion
- On Chip LED Drive with Regulated Current
- Crystal-less
- Low EMI radiation
- Resolution is default by manufacturer (800 or 1200 CPI)
- Supports 3D (X, Y, Z) input
- Supports 3 buttons and mechanical wheel encoding
- 4 axis sensor rotation (0 degree, 90degrees,180 degrees or 270 degrees)
MX8731A pinout
| Pin | Name | Description |
|---|---|---|
| 1 | LB | Left button input |
| 2 | MB | Middle button input |
| 3 | RB | Right button input |
| 4 | DM/DATA | USB D- / PS2 DATA |
| 5 | DP/CLK | USB D+ / PS2 CLK |
| 6 | VDD5 | 5V Power Input |
| 7 | GND | GND |
| 8 | V33 | 3.3V DC voltage output from internal regulator, This pin need to be tied to a 104 capacitor. |
| 9 | RLED | LED current resistor |
| 10 | AGND | Analog GND |
| 11 | XYLED | LED control (sink current) |
| 12 | S_ROT | Option for sensor clockwise rotation angle. |
| 13 | NC | |
| 13 | -- | Option for sensor clockwise rotation angle. |
| 14 | DPI | CPI select pin (0:800 or 1:1200) |
| 15 | Z1 | Z axis Input 1 |
| 16 | Z2 | Z axis Input 2 |
Absolute maximum ratings
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Temperature under bias | Temperature under bias | Min. 0 / Max. 70 | ºC |
| Storage temperature | Storage temperature | Min. –65 / Max. 150 | ºC |
| Input voltage | Input voltage | Min. –0.5 / Max. 6.0 | V |
| Output voltage | Output voltage | Min. –0.5 / Max. 6.0 | V |
MX8731A applications
- Radar Systems
- Microwave Communication
- Satellite Communication
- Broadband Modems
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