BS802B Просмотр технического описания (PDF) - Holtek Semiconductor

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BS802B

(BS801C Thru BS808C) Touch Key

Holtek Semiconductor 

BS801B/02B/04B/06B/08B

Touch Key

Features

· Operating voltage: 2.2V~5.5V

· Ultra low standby current: 1.5mA at 3V

· Auto-calibration

· High reliability touch detections

· High PSRR

· Output type: Level-hold or Toggle

· One-key or Any-key Wake-up Mode

· Wake-up Mode set by pins or serial command

· Open drain NMOS output

· Key status monitored using pins or serial bus

General Description

The BS801B/02B/04B/06B/08B are a range of 1 to 8 key

touch key devices which can detect human body con-

tact using external touch pads. The high level of device

integration enable applications to be implemented with

a minimum number of external components.

The BS804B and BS808B are equipped with a One-line

serial interface to allow easy communication with an exter-

nal MCU for device setup and for touch pin monitoring pur-

poses.

Special internal circuitry is also employed to ensure

excellent power noise rejection to reduce the possibility

of false detections, increasing the touch switch applica-

tion reliability under adverse environmental conditions.

With auto-calibration, low standby current and a choice

of wake-up features, this range of touch key devices

provides a simple and effective means of implementing

touch switches in a wide variety of applications.

Selection Table

Part. No.

Touch

Keys

BS801B 1-Key

BS802B 2-Key

BS804B 4-Key

BS806B 6-Key

BS808B 8-Key

Standby Current at 3V

One-Key

Wake-up

Any-key

Wake-up

1.5mA

¾

¾

2.0mA

1.5mA

1.5mA

1.5mA

3.0mA

4.0mA

5.0mA

Key

Output

Type

Package

Level-Hold

or Toggle

Level-Hold

or Toggle

¾

Level-Hold

or Toggle

Level-Hold

SOT23-6

8SOP

8SOP

16NSOP

16NSOP

¾

16NSOP

Level-Hold 20SOP/SSOP

Serial

Interface

¾

¾

Ö

¾

Ö

¾

Auto

Calibration

Ö

Rev. 1.00

1

July 7, 2009

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