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  Holtek Semiconductor Electronic Components Datasheet  

HT7M2127 Datasheet

PIR Detector Miniaturized Module

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HT7M2126/27/36/56/76
PIR Detector Miniaturized Module
General Description
Holtek’s human body infrared detector �m�i�c�ro���m���o�d�
ules, the HT7M21xx series, come fully integrated
with optical lenses, a passive infrared (PIR) sensor
and DSP algorithms. These modules include a wide
range of features such as low power consumption,
an I2C communication interface and DSP algorithms
which improve the reliability of the PIR detector.
Their application range includes home security and
surveillance system as well as basic industrial safety
detection.
Features
Operating voltage: 2.7V ~ 5.5V
Operating temperature: -10 ~ 60°C
Low power consumption:
Operating mode (Moving objects to be detected)
< 1.5mA
Standby with detecting mode < 50μA (Operating
voltage 3.3V)
Intelligent signal recognition algorithm
Optional communication interfaces: I2C for
Network Mode or I/O for Stand-alone Mode
Adjustable sensing sensitivity – Network Mode
Customisable trigger modes: Single/Continuous –
Network Mode
Adjustable trigger output time: 16-bit×100ms –
Network Mode
Low voltage detection: 2.0/2.2/2.4/2.7/3.0/3.3/3.6/
4.0V options – Network Mode
Supports external optical sensors (eg. photo
transistors)
Integrated temperature sensor with temperature
compensation
Quick stabilisation: ready for stable operation
within 12 seconds after power on
Applications
Security Monitoring Systems
Intelligent Lighting Control
Home Appliances Energy-saving Control
• Office and Factory Equipment Automation
Block Diagram
Rev. 1.20
1 June 17, 2016


  Holtek Semiconductor Electronic Components Datasheet  

HT7M2127 Datasheet

PIR Detector Miniaturized Module

No Preview Available !

HT7M2126/27/36/56/76
Mode Selection
The MODE/ACT (MODE/DT) pin is used to select the Network or Stand-alone mode. When a pull-low resistor is
externally connected between the MODE/ACT (MODE/DT) pin to the ground, the Stand-alone mode is selected.
Otherwise, the Network mode is selected if a pull-high resistor or no resistor is externally on this pin.
Network Application Circuit – Network Mode
VDD
VDD
MCU
I²C Interface
HT7M21xx FTS
SCL
SDA
MODE/ACT
VSS
Photo transistor
150K
Interface & Pin Assignment – Network Mode
Pin #
1
2
3
4
5
6
7
8
Function
VSS
VDD
SDA
SCL
FTS
VSS
MODE/ACT
TP1
Description
Negative power supply, GND
Positive power supply
Serial Data Input/Output for I2C interface
Serial Clock Input for I2C interface
Photo transistor signal
Negative power supply, GND
Mode Selection/Motion Detection Output
No connection (Test pin)
Note: When the HT7M21xx selects Network mode and the internal enable bit ACTEN is high, the MODE/ACT
pin will output a high pulse signal with a width of 30 seconds.
Stand-alone Application Circuit – Stand-alone Mode
VDD
VCC
150K
RT
Photo transistor
VDD
FTS
RA=1.8K
VSS STATUS
MODE/ACT
TRO
HT7M21xx
CT=0.22uF
Rev. 1.20
2
June 17, 2016


Part Number HT7M2127
Description PIR Detector Miniaturized Module
Maker Holtek Semiconductor
Total Page 25 Pages
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