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PDF MC33197 Data sheet ( Hoja de datos )
| Número de pieza | MC33197 | |
| Descripción | AUTOMOTIVE WASH WIPER TIMER | |
| Fabricantes | Motorola Semiconductors | |
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Order this document by MC33197/D
MC33197
Advance Information
Automotive Wash Wiper Timer
The MC33197 is a standard wiper timer control device designed for harsh
automotive applications. The device can perform the intermittent, after wash,
and continuous wiper timer functions. It is designed to directly drive a wiper
motor relay. The MC33197 requires very few external components for full
system implementation. The intermittent control pin can be switched to
ground or Vbat to meet a large variety of possible applications. The
intermittent timing can be fixed or adjustable via an external resistor. The
MC33197 is built using bipolar technology and parametrically specified over
the automotive ambient temperature range and 8.0 to 16 V supply voltage.
The MC33197 can operate in both front and rear wiper applications.
• Adjustable Time Interval of Less Than 500 ms to More Than 30 s
• Intermittent Control Pin Can Be Switched to Ground or Vbat
• Adjustable After Wipe Time
• Priority to Continuous Wipe
• Minimum Number of Timing Components
• Integrated Relay Driver With Free Wheeling Protection Diode
• Operating Voltage Range From 8.0 to 16 V
• For Front Wiper and Rear Wiper Window Applications
Device
MC33197D
MC33197P
ORDERING INFORMATION
Operating
Temperature Range
TA = – 40° to +105°C
TA = – 40° to +125°C
Package
SO–8
DIP–8
AUTOMOTIVE WASH
WIPER TIMER
SEMICONDUCTOR
TECHNICAL DATA
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
PIN CONNECTIONS
MAXIMUM RATINGS
Rating
Continuous Supply Voltage (VPin 6)
Storage Temperature
Thermal Resistance (Junction–to–Ambient)
DIP–8 Package
SO–8 Package
Operating Ambient Temperature Range
DIP–8 Package
SO–8 Package
Operating Junction Temperature Range
Maximum Junction Temperature
Symbol
VCC
Tstg
RθJA
TA
TJ
TJ(max)
Value
16
–55 to +150
100
145
–40 to +125
–40 to +105
–40 to +150
150
Unit
V
°C
°C/W
°C
°C
°C
INT
Osc2
Osc1
CONT
1
2
3
4
8 Out
7 Gnd
6 VCC
5 W/W
(Top View)
(SO–8)
Osc1
CONT
W/W
VCC
1
2
3
4
8 Osc2
7 INT
6 Out
5 Gnd
(Top View)
This document contains information on a new product. Specifications and information herein are
subject to change without notice.
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
1
1 page  
MC33197
Overvoltage Protection
In reference to the Block Diagram and Typical Application,
all of the foregoing operational cases require:
R1 ≥ 100 Ω, C1 ≥ 47 µF
R3 ≥ 1.0 kΩ, R4 ≥ 4.7 kΩ, R5 ≥ 4.7 kΩ
The circuit will not operate during the transient conditions.
By using the above component values, the circuit will be able
to sustain the following overvoltages on Vbb without
permanent damage:
1. +28 V for 5 minutes
2. –15 V for 5 minutes
3. –16 V cycled off for 1.0 minute
4. +80 V pulse decaying exponentially to 8.0 V in 400 ms
repeated 3 times at 1.0 minute intervals.
5. ± 300 V pulse decaying exponentially to 30 V in 300 ms
with a maximum energy of 1.0 Joule.
6. ±100 V pulse decaying exponentially to 10 V in 2 ms.
Recommended External Component Values
Below are the recommended component values to ensure
the device will operate properly, and that all specified
parameters will stay within their tolerances.
R1 should be greater than 100 Ω; recommended value of
220 Ω. R1 can be up to 500 Ω, but in this case the tb2v
parameter could be out of it’s specified value (see Electrical
Characteristics and Note 1). Also, the minimum operating
voltage range should be greater than 8.0 V. The following
values should be adhered to:
10 kΩ ≤ R2 ≤ 68 kΩ
1.5 kΩ ≤ R3 ≤ 47 kΩ
R4 ≥ 4.7 kΩ
R5 ≥ 4.7 kΩ
C1 ≥ 47 uF
47 nF ≤ C2 ≤ 470 nF
Application Information
The following is an example of timing calculations using
the following external components values:
R2 = 22 kΩ, R3 = 2.2 kΩ, C2 = 100 nF (Referring to Block
Diagram and Typical Application).
Oscillator Time Base Calculation:
tb1 duration = tb1 x 4 x R2 x C2 = 1 x 4 x 27e3 x 100e–9 =
10.8 ms
tb2 duration_g (INT to Gnd) = tb2g x R3 x C2 = 15.5 x 2.2e3
x 100e–9 = 3.41 ms
tb2 duration_v (INT to Vbb) = tb2v x R3 x C2 = 12.1 x 2.2e3
x 100e–9 = 2.66 ms
Intermittent timing calculation:
T3 = 16 x 4 x tb1 duration = 16 x 4 x 10.8 ms = 691 ms
T4 = 144 x 4 x tb2 duration_g = 144 x 4 x 3.41 ms = 1.96 s
(INT connected to Gnd)
T4 = 144 x 4 x tb2 duration_v = 144 x 4 x 2.66 ms = 1.53 s
(INT connected to Vbb)
Wash wipe timing calculation:
T2 = 96 x 4 x tb1 = 96 x 4 x 10.8 ms = 4.15 s
T1 Debounce Time Calculation (see T1 Debounce Timing)
When oscillator is oscillating at tb1:
T1 minimum = 4 x tb1 = 4 x 10.8 ms = 43.2 ms
T1 maximum = 2 x 4 x tb1 = 2 x 4 x 10.8 ms = 86.4 ms
When oscillator is oscillating at tb2:
T1 minimum (INT connected to Gnd, tb2g) = 4 x tb2 = 4 x
3.41 ms = 13.6 ms
T1 maximum (INT connected to Gnd, tb2g) = 2 x 4 x tb2 =
2 x 4 x 3.41 ms = 27.3 ms
MOTOROLA ANALOG IC DEVICE DATA
5
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| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC33197.PDF ] | |
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