A5348CA-T Allegro Microsystems Inc, A5348CA-T Datasheet

A5348CA-T

Manufacturer Part Number

A5348CA-T

Description

IC SMOKE DETECTOR ION 16-DIP

Manufacturer

Allegro Microsystems Inc

Type

Smoke Detectorr

Datasheet

1.A5348CA.pdf (9 pages)

Specifications of A5348CA-T

Input Type

Voltage

Output Type

Voltage

Interface

CMOS

Current - Supply

12µA

Mounting Type

Through Hole

Package / Case

16-DIP (0.300", 7.62mm)

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

A5348CA-T

Manufacturer:

MICRON

Quantity:

101

Current page: 1 of 9
Download datasheet (278Kb)

Features and Benefits

▪ Low average standby current for long battery life

▪ Interconnect up to 125 detectors

▪ Piezoelectric horn driver

▪ Guard outputs for detector input

▪ Pulse testing for low battery

▪ Power-on reset (POR)

▪ Internal reverse battery protection

▪ Timer (Hush) mode for enabling reduced sensitivity period

▪ Built-in hysteresis reduces false triggering

Package: 16-pin DIP (suffix A):

26110.3 Rev. 4

9 V

Not to scale

To / from

other units

50 kΩ

1 μF

8.2 MΩ

200 Ω

Timer

Mode

330 Ω

TIMER START

I/O

LOW-V SET

TIMER OUT

LED

VDD

TIMING RES

FEEDBACK

A5348

200 kΩ

SENSITIVITY SET

Typical Application

DETECT IN

OSC CAP

GUARD1

GUARD2

HORN2

HORN1

VSS

Description

The A5348 is a low-current, BiCMOS circuit providing

all of the required features for an ionization-type smoke

detector. A networking capability allows as many as 125

units to be interconnected so that if any unit senses smoke all

units will sound their alarm. In addition, special features are

incorporated to facilitate alignment and test of the finished

smoke detector.

The internal oscillator and timing circuitry keep standby power

to a minimum by powering down the device for 1.66 seconds

and sensing for smoke for only 10 ms. Every 24 on-off cycles,

a check is made for a low battery condition. By substituting

other types of sensors or a switch for the ionization detector,

this very-low–power device can be used in numerous other

battery-operated safety/security applications.

The A5348 is supplied in a low-cost 16-pin dual in-line plastic

package (DIP). It is rated for continuous operation over the

temperature range of –10°C to 60°C. The Pb (lead) free version

(suffix –T) has 100% matte tin leadframe plating.

with Interconnect and Timer

0.1 μF

Ionization Smoke Detector

1.5 MΩ

220 kΩ

200 k Ω

Push

to Test

0.001 μF

Use an external resistor to adjust

sensitivity for a particular smoke chamber.

Select resistor to reduce sensitivity

during Timer mode.

A resistor to VSS or VDD may

be added to this pin to modify

low battery voltage threshold.

Value of component will vary, based on

the piezoelectric horn used.

A5348

Related parts for A5348CA-T

A5348CA-T Summary of contents

Page 1

Features and Benefits ▪ Low average standby current for long battery life ▪ Interconnect up to 125 detectors ▪ Piezoelectric horn driver ▪ Guard outputs for detector input ▪ Pulse testing for low battery ▪ Power-on reset (POR) ▪ Internal ...

Page 2

... A5348 Selection Guide Part Number Pb-Free A5348CA-T Yes A5348CA – Absolute Maximum Ratings* Characteristic Supply Voltage Range Input Voltage Range Reverse Battery Condition Duration Input Current Operating Ambient Temperature Junction Temperature Storage Temperature Range * CAUTION:BiCMOS devices have input static protection but are susceptible to damage when exposed to extremely high static electrical charges. ...

Page 3

A5348 +Supply 9V VDD LBSamp Low Battery Sample LOW-V SET SENSITIVITY SET SSamp Smoke Sample -Supply VSS Functional Block Diagram I Band Gap Low Battery 600 kΩ Comparator _ Logic + 500 kΩ Smoke Comparator LBSamp ...

Page 4

A5348 ELECTRICAL CHARACTERISTICS R = 8.2 MΩ (unless otherwise noted) TIMINGRES Characteristic Symbol Supply Voltage Range V DD Supply Current I DD Detector Input Current I DETECTIN V OS(GUARD1) Input Offset Voltage V OS(GUARD2 Hysteresis V HYS V ...

Page 5

A5348 ELECTRICAL CHARACTERISTICS R = 8.2 MΩ (unless otherwise noted) TIMINGRES Characteristic Symbol I IOL I/O Current I IOH I/O Alarm Voltage V IH(IO) I/O Delay t r(io) 1 Negative current is deﬁ ned as coming out of the speciﬁ ...

Page 6

A5348 SENSITIVITY SET and VSS, with the value: = 1.1E6 × – SENSITIVITYSET where SENSITIVITYSET Low Battery The low battery condition threshold is set internally by ...

Page 7

A5348 Standby Mode OSC CAP Pin Internal Clock Smoke Sample Low Battery Test LED Pin Timer Mode Internal Clock TIMER START Pin TIMER OUT Pin LED Pin Horn Enable Low Battery Condition VDD Pin Low Battery Test LED Pin LED ...

Page 8

A5348 Local Smoke Detection/Test Alarm Condition Test event Smoke Sample Smoke Chamber LED Pin Horn Enable I/O Pin Remote Alarm Condition LED Pin Horn Enable I/O Pin Ionization Smoke Detector with Interconnect and Timer t osc(alarm) OSC CAP Pin Internal ...

Page 9

A5348 A 0.13 MIN 16X 0.46±0.10 0.25 M Allegro MicroSystems offers an industry-leading range of ionization and photoelectric smoke detector ICs. For a current listing, please visit our website at: Copyright ©1990-2009, Allegro MicroSystems, Inc. The products described here are ...

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