BISS0001
Micro Power PIR Motion Detector IC
===========================================
Features
Low power CMOS technology (ideal for battery operated PIR devices)
CMOS high input impedance operational amplifiers
Bi-directional level detector / Excellent noise immunity
Built-in Power up disable & output pulse control logic
Dual mode : retriggerable & non-retriggerable
Pin description
Pin Number Symbol Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
*
Tx = The time duration during which the output pin (Vo) remains high after triggering.
Ti = During this time period, triggering is inhibited. See timing charts for details.
A Retriggerable & non-retriggerable mode select
(A=1 : re-triggerable)
VO Detector output pin (active high)
RR1 Output pulse width control (Tx) * See definition below
RC1 Output pulse width control (Tx) *
RC2 Trigger inhibit control (Ti) *
RR2 Trigger inhibit control (Ti) *
Vss Ground
VRF RESET & voltage reference input
(Normally high. Low=reset)
VC Trigger disable input
(VC >0.2Vdd=enable; Vc<0.2Vdd =disabled)
IB Op-amp input bias current setting
Vdd
2OUT
2IN
+
1IN
1IN
1OUT
Supply voltage
2nd stage Op-amp output
2nd stage Op-amp inverting input
1 st stage Op-amp non-inverting input
1 st stage Op-amp inverting input
1 st stage Op-amp output
Tx ≈ 24576 xR10 x C6； Ti ≈ 24 x R9 x C7。 (ref to schematic)
Absolute max. ratings
Description Condition Range Unit
Supply voltage -- 3 ~ 5 V
Input voltage -- Vss-0.3~ Vdd+0.3 V
Output current Vdd=5V 10 mA
Operating
temperature
Storage
temperature
-- -20 ~ +70
-- -40 ~ +125
Retrigerrable waveform
(NOTE : VH=0.7Vdd, VL=0.3Vdd)
°C
°C
Non-retriggerable waveform
(NOTE : VH=0.7Vdd, VL=0.3Vdd)
Internal Block Diagram
Tx – Output pulse width control Ti - Trigger inhibit timing control
Application Example
-- Passive Infrared Detector for alarm system
Tx ≈ 24576 x R10 x C6 ； Ti ≈ 24 x R9 x C7。 (ref to schematic)
R3
is a light dependent resistor which has low resistance under strong ambient
light. This causes the detector to be operational only when the detection area
is sufficiently dark.
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