Custom Mixed Signal Automotive ASICs

A selection of custom mixed signal Automotive ASICs from Custom Silicon Solutions, including an Electronic Odometer with LCD Driver, an Engine Monitor & Warning Light Controller and a Digital Pulse Width Modulator (PWM).

Electronic Odometer with LCD Driver

This custom ASIC is a fully electronic odometer for automotive and electric vehicle applications. It contains a programmable prescaler and two decade counters for “Season” and “Trip” mileage. Data is stored in a nonvolatile memory (EEPROM) and retained if power is lost. A seven-digit LCD driver is included.


  • Internal 5V Regulator
  • Record Miles or Hours
  • Data is backed up in EEPROM
  • 7 Decade Season, 5 Decade Trip Counters
  • 20 Bit Binary Prescaler
  • 7 Digit LCD Driver (Duplex)
  • Temperature Range = -40°C to +85°C
  • Absolute or Ratiometric Sensors
  • Electronic Odometer with LCD Driver

    Engine Monitor & Warning Light Controller

    This device monitors up to four engine parameters (temperature, voltage, pressure, etc.) and activates the corresponding warning light if the parameter is out of range. The sensor inputs may be absolute or ratiometric. They are digitally filtered and may include hysteresis to eliminate flickering. This custom ASIC is intended for automotive instrument clusters.


  • Internal 10V Regulator
  • 4 Sensor Channels
  • Absolute or Ratiometric
  • Optional Hystersis
  • Programmable Digital Filters
  • Internal Oscillator for Clock Generation
  • External R & C
  • Temperature Range = -40°C to +85°C
  • Engine Monitor & Warning Light Controller

    Digital Pulse Width Modulator (PWM)

    The CSS68HC68W1 IC modulates an input clock to provide a variable frequency and variable duty-cycle output signal. Three 8-bit registers are accessed via a three-wire interface, compatible with Motorola’s SPI bus. They control pulse width, frequency and configuration. This part is a direct replacement for Intersil’s CDP68HC68W1 IC. This device is an “off-the-shelf” standard product available for purchase.


  • Direct replacement for Intersil CDP68HC68W1
  • 2.5V to 6.0V Supply Range
  • Programmable Frequency & Duty Cycle Output
  • Three-wire Serial Bus Input
  • 8 MHz Clock Input Frequency
  • 8 Lead Green PDIP Package
  • Temperature Range = -40°C to +85°C
  • Digital Pulse Width Modulator (PWM)