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10-54
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
Intersil Corporation 1999
Description
The HIP9020 is a Vehicle Speed Sensor (V
SS
) Buffer IC. It
receives sinusoidal vehicle speed information from a
speedometer signal source. The signal is amplified and
squared before frequency processing is done. The circuit
provides pin programmable integer prescaler and postscaler
dividers to scale the output frequencies. The prescaler
divider output of the frequency doubler is mode selected for
1 and 6 through 11. The postscaler mode is selected to the
Output 3 with a divide by 1 or 2. The four V
OX
outputs are
open collector drivers.
Speed Sensor Input (SSI) - When current limited with a
40k
source impedance from the vehicle speed sensor, the
SSI input is capable of functioning over a wide range of input
signal. The limiter and squaring action is derived from the
zero crossing of the input signal. The signal is converted into
a square wave with a controlled hysteresis squaring
amplifier.
Power Supply - The power supply pin 2 input is intended to
operate from a 5.0V
±
0.3V source. The internal reference
sources are derived from a temperature stable bandgap;
including an optional 5.7V shunt regulator which may be
used as shown in Figure 2.
Output Drivers - Each output driver is an open NPN collector
with a zener clamp level of typically 35V and short circuit
current limiting. Each output is capable of sinking 15mA of
current.
File Number
2790.2
October 1993
HIP9020
Programmable Quad Buffer with
Pre and Post Scaler Dividers
Features
Sine Wave Speedometer Input
Input Limiting
. . . . . . . . . . . ±
0.25V to
±
100V (with 40k
)
Over Voltage Protection
Current Limiting
Programmable Prescaler 1, 6 - 11
Post Scaler Frequency Divide by 1 or 2
Drivers with 15mA/24V Capability
Outputs 4 Separate Square Waves
Internal Regulator and Bias Source
0kHz to 6kHz Input Signal Range
-40
o
C to +125
o
C Operating Temperature Range
Applications
Prescaler
Buffer/Limiter
Signal Interface
Automotive Speedometer
Automotive Speed Control
Automotive Tachometer
Ordering Information
PART
NUMBER
TEMPERATURE
RANGE
PACKAGE
HIP9020AP
-40
o
C to +125
o
C
14 Lead Plastic DIP
HIP9020AB
-40
o
C to +125
o
C
20 Lead Plastic SOIC (W)
Pinouts
HIP9020 (PDIP)
TOP VIEW
HIP9020 (SOIC)
TOP VIEW
GND
V
CC
POSS
SSI
BUF
VO1
VO2
VO3
VO4
PRSS–A
1
2
3
4
5
6
7
14
13
12
11
10
9
8
PRSS–B
PRSS–C
PRSO
POSI
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
GND
V
CC
NC
SSI
BUF
NC
NC
VO1
NC
VO2
VO3
NC
VO4
NC
PRSS–A
PRSS–B
PRSS–C
POSS
PRSO
POSI