BL59A10/BL59S10
PHOTOELECTRIC SMOKE DETECTOR IC
1. Product description
1.1. Basic function:
BL59A10/BL59S10 is a CMOS LSI used for smoke detection. Ultra-low power analog and
digital circuits are contained in it. Combined with an IR photoelectric chamber, this IC is used to
detect smoke through receiving light scattered by tiny smoke particles going into the chamber.
When smoke is detected, A burst of alarm sounds are generated by an external piezoelectric
buzzer driven by the push-pull output of this IC.
1.2. Applications:
Smoke detection system.
2. Features:
Power supply range:
Average supply current:
Operating temperature range:
6V
�½�
12V
12uA
-10
�½�
60℃
Ideal for battery powered applications.
3. Block diagram of this IC
I/O
7
COMP
ALARM
LOGIC
8
9
10
BRASS
SILVER
FEEDBACK
C1 C2
1 2
DETECT
3
AMP
REF1
0SC
R1
12
13
TIMING
LOGIC
REF2
6
11
IRED
LED
TEST 16
STROBE
LOW-SUPPLY
7
15
COMP
PIN5=Vdd
PIN14=Vss
4. Pin assignment
C1
C2
Detect
Strobe
Vdd
IRED
I/O
Brass
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Test
Low-Supply
Vss
R1
Osc
LED
Feedback
Silver
http://www.belling.com.cn
-1-
8/28/2006
Wrote by 2006
Total
8 Pages
BELLING [ SHANGHAI BELLING CO., LTD. ]
