Description
The HIP9020 is a Vehicle Speed Sensor (VSS) 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 VOX outputs are open collector drivers.

Features
• Sine Wave Speedometer Input
• Input Limiting . . . . . . . . . . . ±0.25V to ±100V (with 40kΩ)
• 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°C to +125°C Operating Temperature Range

Applications
• Prescaler
• Buffer/Limiter
• Signal Interface
• Automotive Speedometer
• Automotive Speed Control
• Automotive Tachometer