CST8191采用低功耗CMOS工艺，设计用于低功耗、高性能单极检测大厅效应应用，如盖开关、非接触开关、固态开关、盖关闭传感器等电池操作。霍尔集成电路集成了一个用于磁传感的片上霍尔电压发生器，一个放大霍尔电压的比较器，一个斩波放大器，一个施密特触发器来提供开关滞后的噪声抑制，以及一个互补输出。

    CST8191在3.3V电源条件下的总功耗通常小于1.8uA。CST1918被设计用来应对交替的南极。当磁通密度(B)大于操作点（BOP）时，输出将打开（低），保持输出，直到磁通密度(B)低于释放点（BRP），然后关闭（高）。

    该芯片可采用SOT23-3L、SSOT23-3L、TSOT23-3L、SOT553、SIP-3L、DFN1006-3L和DFN101010-4L封装，额定功率超过-40°C至85°C。该包装符合RoHS标准。

    Using low power CMOS process, the CST8191 is designed for low power, high performance unipolar detection hall-effect application, such as cover switch,contactless switch, solid state switch and lid close sensor etc battery operation. The hall IC integrated an on-chip hall voltage generator for magnetic sensing, a comparator that amplifiers the hall voltage, a Chopper amplifier, a Schmitt trigger to provide switching hysteresis for noise rejection, and a complementary output.

    The total power consumption of CST8191 is typically less than 1.8uA at 3.3V power supply.CST1918 is designed to respond to alternating South pole. When the magnetic flux density (B) is larger than operate point (BOP), the output will be turned on (low),the output is held until the magnetic flux density (B) is lower than release point (BRP), then turn off (high).

    The device is available in SOT23-3L, SSOT23-3L,TSOT23-3L, SOT553, SIP-3L, DFN1006-3L and DFN1010-4L Packages and is rated over the -40°C to 85°C. The package is RoHS compliant.

CST8191 Features/特性:

Input Voltage Range : 1.65V to 5.5V

Micro-power consumption ideal for battery power applications

Unipolar Operation, easy to use as output

Very high sensitivity hall sensor

Low Power CMOS process technology

Chopper stabilization amplifier stage

Magnetic Sensitivity (typical) BOP=±42Gauss, BRP=±25Gauss

Good RF noise immunity

No need pull-up resistor

Small Solution Size

RoHS & Green Compliant

SOT23-3L, SSOT23-3L, TSOT23-3L, SOT553, SIP-3L, DFN1006-3L and DFN1010-4L Packages

-40℃ to +125 ℃ Temperature Range

CST8191 Applications/应用:

Cover switch in clam-shell cellular phones

Cover switch in Notebook, PC/PAD

Contact-less switch in consumer products

Solid State Switch

Handheld Wireless Handset Awake Switch

Lid close sensor for battery-powered devise

Magnet proximity sensor for reed switch replacement in low duty cycle applications

DV, DSC, and White Goods

CST8191 Ordering Information：

Part Number	BOP(Gauss)	BRP Gauss)	Package Type	Package Qty	Temperature	Eco Plan
CST8191S2RN	-42	-25	SSOT23-3L	7-in reel 3000pcs/reel	-40～85℃	Green
CST8191STRN	-42	-25	SOT23-3L	7-in reel 3000pcs/reel	-40～85℃	Green
CST8191TWRN	-42	-25	TSOT23-3L	7-in reel 3000pcs/reel	-40～85℃	Green
CST8191WRN	+42	+25	SOT553	7-in reel 3000pcs/reel	-40～85℃	Green
CST8191D6RN	+42	+25	DFN1006-3L	7-in reel 10000pcs/reel	-40～85℃	Green
CST8191D1RN	+42	+25	DFN1010-4L	7-in reel 10000pcs/reel	-40～85℃	Green
CST8191MBN	+42	+25	SIP-3L	1000pcs/Package	-40～85℃	Rohs
CST8191NMBN	-42	-25	SIP-3L	1000pcs/Package	-40～85℃	Rohs

CST8191 Marking & Pin Assignment: