A5358CA-T datasheet(2/13 Pages) ALLEGRO

Part #	A5358CA-T

Description	The A5358 is a low-current BiCMOS circuit providing all of the required features for a photoelectric type smoke detector.

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Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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2 / 13 page

Photoelectric Smoke Detector

with Interconnect and Timer

A5358

2

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Selection Guide

Part Number

Pb-free

Package

Packing

A5358CA

–

16-pin DIP through hole

25 pieces / tube

A5358CA-T

Yes

16-pin DIP through hole

25 pieces / tube

A5358CLWTR-T

Yes

16-pin SOICW surface mount

1000 pieces / reel

Absolute Maximum Ratings*

Characteristic

Symbol

Notes

Rating

Units

Supply Voltage Range

VDD

Referenced to VSS

–0.5 to 15

V

Input Voltage Range

VIN

Referenced to VSS

–0.3 to VDD+0.3

V

Input Current

IIN

10

mA

Operating Ambient Temperature Range

TA

–25 to 75

ºC

Maximum Junction Temperature

TJ(max)

150

ºC

Storage Temperature Range

Tstg

–55 to 125

ºC

*CAUTION: BiCMOS devices have input static protection but are susceptible to damage if exposed to extremely high static electrical

charges.

Terminal List Table

Number

Name

Function

1

C1

Sets photoamplifier gain in supervisory mode

2

C2

Sets photoamplifier gain in standby mode

3

DETECT

Photoamplifier input

4

STROBE

Strobed supply (VDD – 5 V) for photoamplifier low-side

reference

5

VDD

Positive supply voltage

6

IRED

Output to smoke chamber IR LED driver

7

I/O

Input-output to interconnected detectors

8

HORN1

Output for driving piezoelectric horn

9

HORN2

Complementary output for driving piezoelectric horn

10

FEEDBACK

Input for driving piezoelectric horn

11

LED

Output to drive visible LED

12

OSC CAP

Connection for capacitor to set clock frequency

13

TIMING RES

Connection for resistor to set clock frequency

14

VSS

Negative supply voltage

15

HUSH

Input for photoamplifier timer mode reference; can also

disable timer mode

16

TEST

Enables push-to-test mode and diagnostic test/calibration

mode; starts timer mode, if enabled

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

TEST

HUSH

VSS

TIMING RES

OSC CAP

LED

FEEDBACK

HORN2

C1

C2

DETECT

STROBE

VDD

IRED

I/O

HORN1

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

TEST

HUSH

VSS

TIMING RES

OSC CAP

LED

FEEDBACK

HORN2

C1

C2

DETECT

STROBE

VDD

IRED

I/O

HORN1

Package A

Package LW

Pin-out Diagrams

Thermal Characteristics

Characteristic

Symbol

Test Conditions*

Value

Units

Package Thermal Resistance

RθJA

Package A, on 4-layer PCB based on JEDEC standard

38

ºC/W

Package LW, on 4-layer PCB based on JEDEC standard

48

ºC/W

*Additional thermal information available on Allegro website.

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