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Miniaturized Module. HT7M2176 Datasheet

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Miniaturized Module. HT7M2176 Datasheet






HT7M2176 Module. Datasheet pdf. Equivalent




HT7M2176 Module. Datasheet pdf. Equivalent





Part

HT7M2176

Description

PIR Detector Miniaturized Module



Feature


HT7M2126/27/36/56/76 PIR Detector Miniat urized Module General Description Holt ek’s human body infrared detector � m�i�c�ro���m���o�d ules, the HT7M21xx series, come full y integrated with optical lenses, a pas sive infrared (PIR) sensor and DSP algo rithms. These modules include a wide ra nge of features such as low power consu mption, an I2C communication interface and D.
Manufacture

Holtek Semiconductor

Datasheet
Download HT7M2176 Datasheet


Holtek Semiconductor HT7M2176

HT7M2176; SP algorithms which improve the reliabil ity of the PIR detector. Their applicat ion range includes home security and su rveillance system as well as basic indu strial safety detection. Features • Operating voltage: 2.7V ~ 5.5V • Ope rating temperature: -10 ~ 60°C • Lo w power consumption: ♦♦ Operating m ode (Moving objects to be detected) < 1 .5mA ♦♦ Standby with detectin.


Holtek Semiconductor HT7M2176

g mode < 50μA (Operating voltage 3.3V) • Intelligent signal recognition alg orithm • Optional communication int erfaces: I2C for Network Mode or I/O fo r Stand-alone Mode • Adjustable sens ing sensitivity – Net .


Holtek Semiconductor HT7M2176

.

Part

HT7M2176

Description

PIR Detector Miniaturized Module



Feature


HT7M2126/27/36/56/76 PIR Detector Miniat urized Module General Description Holt ek’s human body infrared detector � m�i�c�ro���m���o�d ules, the HT7M21xx series, come full y integrated with optical lenses, a pas sive infrared (PIR) sensor and DSP algo rithms. These modules include a wide ra nge of features such as low power consu mption, an I2C communication interface and D.
Manufacture

Holtek Semiconductor

Datasheet
Download HT7M2176 Datasheet




 HT7M2176
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




 HT7M2176
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




 HT7M2176
HT7M2126/27/36/56/76
Interface & Pin Assignment – Stand-alone Mode
Pin #
1
2
3
4
5
6
7
8
Function
VSS
VDD
STATUS
TRO
FTS
VSS
MODE/DT
TP1
Description
Negative power supply, GND
Positive power supply
Warm-up/Detecting/Low voltage status
PIR trigger output
Photo transistor signal
Negative power supply, GND
Mode & Duration time Selection
No connection (Test pin)
The default configurations for the Stand-alone Mode are as follow:
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 (RA+RT) together with the capacitance of CT with a fixed value
of 0.22μF.
External capacitance CT = 0.22uF*, VDD = 3.3V
RA+RT Resistance (Ω)
1.8K
2.2K
TRO output duration time *
3sec. 10sec.
2.7K
38sec.
3K
1mins.
3.3K
3mins.
3.6K
5mins.
3.9K
10mins.
Note: (a) The TRO output high duration is 30 seconds in default if there is no external capacitor CT.
(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-up mode: A toggle output with a frequency of 2.5Hz will be output on the STATUS pin.
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
4s
4s
10ms
Output signal
10ms
10ms
(c) Low voltage mode: Two low pulses with a width of 10ms will first be output on the STATUS pin and the
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.
1s 1s 1s
STATUS
80ms
80ms
80ms
10ms
10ms
Output signal
10ms
10ms
10ms
10ms
Rev. 1.20
3 June 17, 2016



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