Datasheet > HT7M2127

HT7M2127

更新时间： 2022-02-26 11:08:45

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		/
页数	文件大小	规格书
25页	4237K
描述
PIR Detector Miniaturized Module

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中文翻译

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HT7M2127 数据手册

HT7M2126/27/36/56/76

Interface & Pin Assignment – Stand-alone Mode

Pin #

Function

VSS

Description

Negative power supply, GND

Positive power supply

VDD

STATUS

TRO

Warm-up/Detecting/Low voltage status

PIR trigger output

FTS

Photo transistor signal

VSS

Negative power supply, GND

Mode & Duration time Selection

No connection (Test pin)

MODE/DT

TP1

TheꢀdefaultꢀconﬁgurationsꢀforꢀtheꢀStand-aloneꢀModeꢀareꢀasꢀfollow:

1. Continuous trigger mode

2. The TRO pin will output a high pulse signal when an available trigger is detected. The high pulse duration is

determined by the external pull�low resistance of (R_A+R_T) together with the capacitance of C_Tꢀwithꢀaꢀﬁxedꢀvalueꢀ

ofꢀ0.22μF.

External capacitance C_T= 0.22uF*, V_DD= 3.3V

RA+RT Resistance (Ω)

1.8K

2.2K

2.7K

3.3K

3.6K

3.9K

TRO output duration time *

3sec.

10sec.

38sec.

1mins.

3mins.

5mins.

10mins.

Note: (a) The TRO output high duration is 30 seconds in default if there is no external capacitor C_T.

(b) The value of the resistance, capacitance and TRO output duration time in the above table is used for ref�

erence only.

3. The STATUS pin will output various types of signals corresponding to the device in the warm�up mode, standby

detection mode or low operating voltage mode where the operating voltage is lower than 2.7V respectively.

(a) Warm-upꢀmode:ꢀAꢀtoggleꢀoutputꢀwithꢀaꢀfrequencyꢀofꢀ2.5HzꢀwillꢀbeꢀoutputꢀonꢀtheꢀSTATUSꢀpin.

STATUS

(f=2.5Hz)

(b) Standy detection mode: A signal composed of a low pulse of 10ms and a high pulse of 4s will continuously

be output on the STATUS pin.

STATUS

10ms

Output signal

(c)ꢀLowꢀvoltageꢀmode:ꢀTwoꢀlowꢀpulsesꢀwithꢀaꢀwidthꢀofꢀ10msꢀwillꢀﬁrstꢀbeꢀoutputꢀonꢀtheꢀSTATUSꢀpinꢀandꢀtheꢀ

time duration between these two low pulses is 80ms. Then a high pulse with the width of 1 second will con�

secutively be output. Such an output signal will continuously be output on the STATUS pin.

STATUS

80ms

10ms

Output signal

10ms

Rev. 1.20

June 17, 2016

1 234 5 6 7...25

中文翻译

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