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參數(shù)資料
| 型號： | A5358CA |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | PHOTOELECTRIC SMOKE DETECTOR WITH INTERCONNECT AND TIMER |
| 中文描述： | 光電感煙探測器與互連和定時器 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 98K |
| 代理商： | A5358CA |
PIN AND CIRCUIT DESCRIPTION, continued
PIN 11 (LED)
This open-drain NMOS output is used to directly drive
a visible LED. The load for the low-battery test is applied
to this output. The low-battery test does not occur coinci-
dent with any other test or alarm signal. The LED also
indicates detector status as follows (with component
values as in the typical application, all times nominal):
Standby
Local Smoke
Remote Alarm
- No pulses.
Test Mode
Timer Mode
- Pulses every 43 seconds.
- Pulses every 0.67 second.
- Pulses every 0.67 second.
- Pulses every 10 seconds.
PIN 12 (OSC. CAP.)
A capacitor between this pin and V
DD
, along with a
parallel resistor, forms part of a two-terminal oscillator and
sets the internal clock low time. With component values
as shown, this nominal time is 11 ms and essentially the
oscillator period.
PIN 13 (TIMING RES.)
A resistor between this pin and OSC. CAP. (pin 12) is
part of the two-terminal oscillator and sets the internal
clock high time, which is also the I
RED
pulse width. With
component values as shown, this nominal time is 105
μ
s.
PIN 14 (V
SS
)
This pin is connected to the most negative supply
potential (usually ground).
PIN 15 (HUSH)
This input pin serves two purposes in normal opera-
tion. It serves as an enable for the internal 10-minute
(nominal) timer and also as the reference for the smoke
comparator during the timer mode. This reference is
established by a resistive divider between V
DD
and
STROBE (R
X1
and R
X2
). This allows the detector to have
a different sensitivity set point during the timer mode. If
the timer mode is not used, this pin can be left open or
connected to V
SS
, which disables this mode.
PIN 16 (TEST)
This pin has an internal pull-down device and is used
to manually invoke two test modes and a Timer Mode.
The Push-to-Test Mode is initiated by a high logic
level on this pin (usually the depression of a normally
open push-button switch to V
DD
). After one oscillator
cycle, I
RED
pulses every 336 ms (nominal) and amplifier
gain is increased by internal selection of C
1
. Background
reflections in the smoke chamber can be used to simulate
a smoke condition. After the third I
RED
pulse, a successful
test (three consecutive simulated smoke conditions)
activates the horn drivers and the I/O pin. When the
push-button is released, the input returns to V
SS
due to
the internal pull down. After one oscillator cycle, the
amplifier gain returns to normal and after three additional
I
RED
pulses (less than one second), the device exits this
mode and returns to standby. This high-to-low transition
on pin 16 also resets and starts the 10 minute hush timer
(timer mode).
Pin Name
Pin No. Configuration
I/O
7
Disabled as an output. A logic
high on this pin places the photo
amplifier output on pin 1 or pin 2
as determined by pin 15. The
amplifier output appears as
pulses.
HUSH
15
If the I/O pin is high, this pin
controls the amplifier gain capaci
tor. If pin 15 is low, normal gain is
selected and the amplifier output
is on pin 1. If pin 15 is high,
supervisory gain is selected and
the amplifier output is on pin 2.
FEEDBACK 10
If pin 7 is high and pin 15 is low
(normal gain), taking this pin to a
high logic level increases the
amplifier gain by ~10% (hyster-
esis).
OSC. CAP.
12
This pin may be driven by an
external clock source. Driving
this pin low and high drives the
internal clock low and high. The
external RC network may remain
intact.
5358
PHOTOELECTRIC SMOKE DETECTOR
with INTERCONNECT and TIMER
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A5358CAT | 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Photoelectric Smoke Detector with Interconnect and Timer |
| A5358CA-T | 功能描述:IC SMOKE DETECTOR PHOTO 16-DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件 |
| A5358CLW-T | 制造商:Allegro MicroSystems LLC 功能描述: |
| A5358CLWTR | 制造商:Allegro MicroSystems LLC 功能描述: |
| A5358CLWTR-T | 功能描述:IC SMOKE DETECTOR PHOTO 16-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 傳感器和探測器接口 系列:- 其它有關(guān)文件:Automotive Product Guide 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:74 系列:- 類型:觸控式傳感器 輸入類型:數(shù)字 輸出類型:數(shù)字 接口:JTAG，串行 電流 - 電源:100µA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:20-TSSOP 包裝:管件 |
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