Datasheet

Sensors
Freescale Semiconductor 5
MC146010
A
rchived by Freescale Semiconductor, Inc., 2009
Archive Information Archive Information
No. Symbol Parameter Test Condition Clocks
Min
(1)
Typ
(2)
Max
(1)
Unit
13 t
CH
Silver and Brass Chirp Pulse Period Low Supply or Degraded
Chamber Sensitivity
4096 38.9 43 47.1 s
14 t
W(CH)
Silver and Brass Chirp Pulse Width Low Supply or Degraded
Chamber Sensitivity
1.0 9.5 10.5 11.5 ms
15 t
RR
Rising Edge on IO to Smoke Alarm
Response Time
Remote Smoke, No local
smoke
——2sec
(3)
—
16 t
stb
Strobe Out Pulse Period Smoke Test 1024 9.67 10.8 11.83 s
17 Chamber Sensitivity Test
Without Local Smoke
4096 38.9 43 47.1 s
18 Low Supply Test Without Local
Smoke
4096 38.9 43 47.1 s
19 Pushbutton Test/Speed-Up 128 1.2 1.3 1.5 s
20 t
MUTE
Mute time Local smoke — 7.0 10 14 min
1. Oscillator period T (T = T
r
+ T
f
) is determined by the external components R
1
, R
2
and C
3
where T
r
= (0.6931)R
2
*C
3
and T
f
= (0.6931)R
1
*C
3
.
The other timing characteristics are some multiple of the oscillator timing shown in the table. The timing shown should accommodate the
NFPA72, ANSI S3.41, and ISO8201 audible emergency evacuation signals.
2. Typicals are not guaranteed.
3. Time is typical-depends on what point in cycle the signal is applied.
Table 3. AC Electrical Characteristics (Refer to Timing Diagram Figure 3 and Figure 4. T
A
= 25°C, V
DD
= 9.0 V,
Component Values from Figure 5.) (continued)
w
er-on
eset
No Low Supply
Chamber Sensitivity OK
Chirps
Indicate
Low Supply
Chirps
Indicate
Degraded
Chamber
Sensitivity
AC Electrical Characteristics Table
cale.
6
7
9
17
2
5
18
14
13
13