MC146010ED データシートの表示（PDF） - Freescale Semiconductor

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MC146010ED

Low Power CMOS Photoelectric Smoke Detector IC

Freescale Semiconductor 

Table 3. AC Electrical Characteristics (Refer to Timing Diagram Figure 3 and Figure 4. TA = 25°C, VDD = 9.0 V,

Component Values from Figure 5.) (continued)

No. Symbol

Parameter

Test Condition

Clocks Min(1) Typ(2)

Max(1)

Unit

13

tCH Silver and Brass Chirp Pulse Period Low Supply or Degraded

4096 38.9

43

Chamber Sensitivity

47.1

s

14 tW(CH) Silver and Brass Chirp Pulse Width Low Supply or Degraded

1.0

9.5

10.5

Chamber Sensitivity

11.5

ms

15

tRR Rising Edge on IO to Smoke Alarm Remote Smoke, No local

—

—

2 sec(3)

—

Response Time

smoke

16

tstb Strobe Out Pulse Period

17

Smoke Test

1024 9.67

10.8

11.83

s

Chamber Sensitivity Test

4096 38.9

43

47.1

s

Without Local Smoke

18

Low Supply Test Without Local 4096 38.9

43

47.1

s

Smoke

19

Pushbutton Test/Speed-Up 128

1.2

1.3

1.5

s

20 tMUTE Mute time

Local smoke

—

7.0

10

14

min

1. Oscillator period T (T = Tr + Tf) is determined by the external components R1, R2 and C3 where Tr = (0.6931)R2*C3 and Tf = (0.6931)R1*C3.

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.

Sensors

Freescale Semiconductor

MC146010

5

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