MC145018 Просмотр технического описания (PDF) - Freescale Semiconductor

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MC145018

Low-Power CMOS Ionization Smoke Detector IC with Interconnect and Temporal Horn Driver

Freescale Semiconductor 

VDD

VDD

To Other Units

I/O

Feedback

2

8

45 K

Low V Set 3

Detect 1

Comp. Out

Sensitivity 13

Set

325 K

4

Strobe Out

Low Battery

Comparator

+

-

280 K

Detect

+ Comparator

-

15

Guard

Amp

+

Detect

Input

Lo-Z VDD

14

-

Alarm

Logic

Power-on

Reset

HI-Z

16

OSC

And

Timing

11

Silver

10

Brass

5

LED

VDD = Pin 6

VSS = Pin 9

12

7

VDD

Figure 2. Block Diagram

Table 1. Maximum Ratings(1)

(Voltages referenced to VSS)

DC Supply Voltage

Rating

Input Voltage, All Inputs Except Pin 8

DC Current Drain per Input Pin, Except Pin 15 = 1 mA

DC Current Drain per Output Pin

Operating Temperature Range

Storage Temperature Range

Reverse Battery Time

Symbol

VDD

Vin

I

I

TA

Tstg

tRB

Value

–0.5 to + 15

–0.25 to VDD + 0.25

10

30

–10 to + 60

–55 to + 125

5.0

Unit

V

V

mA

mA

°C

°C

s

1. Maximum Ratings are those values beyond which damage to the device may occur.

This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised that

normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. For

proper operation it is recommended that Vin and Vout be constrained to the range VSS ≤ (Vin or Vout) ≤ VDD.

MC145018

2

Sensors

Freescale Semiconductor

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