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RE46C145

CMOS Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode

Microchip Technology 

RE46C145

1.0 ELECTRICAL

CHARACTERISTICS

1.1 Absolute Maximum Ratings†

VDD....................................................................................15V

Input Voltage Range Except FEED, IO .......... VIN = -.3V to VDD +.3V

FEED Input Voltage Range ..................... VINFD =-10 to +22V

IO Input Voltage Range................................. VIO1= -.3 to 15V

Input Current except FEED ................................... IIN = 10 mA

Operating Temperature ................................TA = -25 to +75°C

Storage Temperature ............................TSTG = -55 to +125°C

Maximum Junction Temperature ......................... TJ = +150°C

† Notice: Stresses above those listed under “Maximum

ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of

the device at these or any other conditions above those

indicated in the operation listings of this specification is

not implied. Exposure to maximum rating conditions for

extended periods may affect device reliability.

DC ELECTRICAL CHARACTERISTICS

DC Electrical Characteristics: Unless otherwise indicated, all parameters apply at TA = -25°C to +75°C, VDD = 9V

Parameter

Symbol

Test

Pin

Min

Typ

Max Units

Conditions

Supply Voltage

Supply Current

VDD

5

6

—

12

V Operating

IDD1

5

—

4

6

µA Configured as in Typical

Application, COSC = VSS,

LED off

Input Voltage High

Input Voltage Low

Input Leakage Low

IDD2

5

—

5.5

8

µA Configured as in Typical

Application, VDD = 12V,

COSC = VSS

IDD3

5

—

—

2

mA Configured as in Typical

Application, STROBE on,

IRED off, VDD=12V

IDD4

5

—

—

3

mA Configured as in Typical

Application, STROBE on,

IRED on, VDD = 12V, Note 1

VIH1

10

6.2

—

—

V FEED

VIH2

7

3.2

—

—

V No Local Alarm, IO as Input

VIH3

15

1.6

—

—

V VSEN

VIH4

16

8.5

—

—

V TEST

VIL1

10

—

—

2.7

V FEED

VIL2

7

—

—

1.5

V No Local Alarm, IO as Input

VIL3

15

—

—

.5

V VSEN

VIL4

16

—

—

7

V TEST

IIL1

1,2,3

—

—

-100

nA VDD = 12V, COSC = 12V,

STROBE active

Note 1:

2:

3:

4:

IIL2

10,12

—

—

-100

nA VDD = 12V, VIN = VSS

IIL3

15,16

—

—

-1

µA VDD = 12V, VIN = VSS

ILFD

10

—

—

-50

µA FEED = -10V

Does not include Q3 emitter current.

Not production tested.

Typical values are for design information and are not ensured.

Limits over the specified temperature range are not production tested and are based on characterization

data.

 2009-2012 Microchip Technology Inc.

DS22181C-page 3

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