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PDF MC33187 Data sheet ( Hoja de datos )
| Número de pieza | MC33187 | |
| Descripción | Long Duration Automotive Timer | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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MOTOROLAFreescale Semiconductor, Inc.
Order Number: MC33187/D
Rev. 4, 06/2001
Semiconductor Technical Data
Advance Information
Long Duration Automotive Timer
This circuit is a Long Duration Automotive Timer primarily designed
as a deffoger timer, but as it is realised using a digital divider
techniques and it is suitable for a variety of long duration timing
functions. The circuit is available in an 8 pin surface plastic package.
MC33187
LONG DURATION AUTO-
MOTIVE TIMER
SEMICONDUCTOR
TECHNICAL DATA
• Operating Ambient Temperature from -40°C to 85°C
• Operating Voltage Range from 5V to 18V
• 400mA Output Current Capability
• Integrated Input Debounce Circuitry
• Few External Components
• Toggle Input for Timing Start and Stop
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO-8)
PIN CONNECTIONS
RC 1
Gnd 2
Relay 3
Toggle 4
8 TS
7 N/C
6 N/C
5 Vcc3
Vbat
Block Diagram and Typical Application
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC33187D
-40°C to +85°C
SO8
Q
R-C
1
Q
6.8 Hz
Q
CQ
CQ
1
S
Q
CQ
CQ
S
Q
CR
12
C
S
Q
Dz Relay
3
2
QD
14
QR
J
QC
Debounce Timer
Out
Timing
In
SQ
13
RR
-
I +5
-
+ 2.3V
Vbat
8 TS
5
VCC
4
Toggle
S1
This document contains information on a new product. Specifications and information herein are
subject to change without notice.
For More Information On This Product,
© Motorola, Inc., 2001. All rights reserved.
Go to: www.freescale.com
TM
1 page  
Freescale SMeCm33i1c8o7 nductor, Inc.
This circuit is designed to just use the toggle and relay
If the switch is held operated for 9 seconds, with the
drive feature of the long duration timer.
values recommended below, after it has been used to switch
The functions of components Rs, Cs, Rt, Ct, Rin and Dz the relay on the circuit will time out and the relay switch off.
are as previously described. Although the circuit is not No further action takes place until the circuit is reset by
intended to be allowed to time out, Rt and Ct need to be releasing the button.
included as it is necessary for the timer to run for the internal
If the switch is held operated after it has been used to
debounce timer to be reset.
switch the relay off, nothing happens until the circuit is reset
The control switch S1 needs to be a normally closed by releasing the button.
momentary type.
Recommended values :
While it is closed, D1 ensures that the oscillator does not
Rs = 1KΩ
run, while R1 ensures that D1 is reverse biassed when the
Cs = 100nF
switch is operated (open). C1 is included to provide a time
Rt = 220KΩ
constant RinC1 to delay the detection of a toggle input.
Ct = 10nF
Thus the operation of the circuit is as follows :
Rin = 100KΩ
When S1 is operated, the oscillator is allowed to start ; the
R1 = 1KΩ
toggle input is then recognised and the relay output changes
C1 = 220nF
state assuming that the switch has been released, the
Dz = MZD16
oscillator is stopped and the sequence above can be
D1 = 1N4148
repeated.
Note that the time constant RtCt and RinC1 are related
(start up time and basic frequency of oscillator/switch to
toggle delay time) and need to stay in the ratio (1:10).
Figure 3. Relay Drive and Latch (No Timeout
Ct Rt
Cs
D1
Batt
RC
GND
Relay
Dz C1
Toggle
Rin
S1
TS
N/C
N/C
Vcc
R1
Rs
Batt
MC33187
For More InfoMrOmTaOtRioOnLAOn This Product,
Go to: www.freescale.com
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet MC33187.PDF ] | |
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