M3000 UTC [Unisonic Technologies], M3000 Datasheet - Page 5

• Manufacturer Part Number: M3000
• Description: PIR INFRARED REMOTE CONTROL CIRCUIT
• Manufacturer: UTC [Unisonic Technologies]

M3000
1. Re-Triggerable Mode
operational amplifier OP2, and elevated DC level to VM (≈0.5VDD), The output signal V2 input to Bi-directional level
detector(COP1&COP2), detected the effective signal Vs. As the VH≈0.7VDD, VL≈0.3VDD, while VDD=5V, it is
immune to the ±1V noise interference and can improve system reliability.
Vs transmission to State Control circuit; When Vc>VR, COP3 output is high, chip access to extension time period.
non-retriggerable mode. When the Tx period ended, Vo jump back to the low level, chip access to the lock period Ti.
During the Ti period, any changes of V2 can not make Vo jumping to valid state (high level), it can inhibit a variety of
interference when the load changed.
2. Non-Retriggerable mode
repeatable trigger Vo to the valid state, and keep the state in Tx period.
state; if Vs keep "0 "state, after the period of Tx, Vo change to invalid state, and in the Ti time, any change of Vs can
not trigger Vo to a valid state.
Operational amplifier OP1 composed sensor signal pre-processing circuit. The amplified signal coupled to the
COP3 is a condition comparator. When the input voltage Vc<VR(≈0.2VDD), COP3 output is low, it disabled the
When pin A connect to "0", any change of V2 have been ignored until the end of Tx period, which called
During the time of Vc="0", A="0"，signal Vs can not trigger Vo to a valid state; When Vc="1", A="1", Vs can
In the Tx period, if Vs jump to "1", then Vo extend to an another Tx; if Vs keep "1" state, Vo maintains the valid
FUNCTIONAL DESCRIPTIONS
V
V2
V
V
A
UNISONIC TECHNOLOGIES CO., LTD
OUT
www.unisonic.com.tw
S
C
V
V
H
L
Tx
Non-Retriggerable Waveform
Re-Triggerable Waveform
Ti
Tx
Ti
CMOS IC
QW-R502-473.a
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