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CA3228E bảng dữ liệu(PDF) 1 Page - Harris Corporation

tên linh kiện CA3228E
Giải thích chi tiết về linh kiện  Speed Control System with Memory
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Trang chủ  http://www.harris.com
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CA3228E bảng dữ liệu(HTML) 1 Page - Harris Corporation

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CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
Copyright
© Harris Corporation 1999
10-31
CA3228
Speed Control System with Memory
Description
The CA3228 is a monolithic integrated circuit designed as an
automotive speed-control system.
The system monitors vehicle speed and compares it to a
stored reference speed. Any deviation in vehicle speed
causes a servo mechanism to open or close the engine
throttle as required to eliminate the speed error. The refer-
ence speed, set by the driver, is stored in a 9-bit counter.
The reference speed can be altered by the ACCEL and
COAST driver commands. The ACCEL command causes
the vehicle to accelerate at a controlled rate; the COAST
command disables the servo, thereby forcing the vehicle to
slowdown. Application of the brake disables the servo and
places the system in the standby mode while the RESUME
command returns the vehicle to the last stored speed.
Vehicle speed and driver commands are inputs to the
integrated circuit via external sensors. Actuators are needed
to convert the output signals into the mechanical action
necessary to control vehicle speed.
The CA3228 is supplied in a 24 lead dual-in-line plastic
package (E suffix). Refer to AN7326 for application
information.
Features
• Low Power Dissipation
•I2L Control Logic
• Power-On Reset
• On-Chip Oscillator for System Time Reference
• Single Input Line for Operator Commands
• Amplitude Encoded Control Signals
• Transient Compensated Input Commands
• Controlled Acceleration Mode
• Internal Redundant Brake and Low-Speed Disable
• Braking Disable
Applications
• Automotive Speed Control
• Residential
and
Industrial
Heating
and
Cooling
Controls
• Industrial AC and DC Motor Speed Control
• Applications Requiring Acceleration and Deceleration
Control
File Number
1436.3
June 1999
Pinout
CA3228 (PDIP)
TOP VIEW
1
2
3
4
5
6
7
8
9
10
11
12
GND
NC
DRIVER COMMAND
COMMAND DELAY
OSCILLATOR
V MEMORY
CURRENT SENSE SPEED
SENSOR INPUT
F/V OUT
F/V FILTER
VS
BRAKE INPUT
16
17
18
19
20
21
22
23
24
15
14
13
GND
VACUUM CONTROL
VENT CONTROL
CONTROL AMP+
CONTROL AMP OUTPUT
ALIGN
ACCELERATE CAPACITOR
ACCELERATE RESISTOR
VCC
OUTPUT GATE
CONTROL AMP-
V ERROR
Ordering Information
PART
NUMBER
TEMPERATURE
PACKAGE
CA3228E
-40oC to +85oC
24 Lead Plastic DIP
OBSOLETE
PRODUCT
NO RECOMMENDED
REPLA
CEMENT
Call
Central
Applications
1-800-442-7747
or email:
centapp@harris.com


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