Products>LCD Driver for Mobile Phone>ST7637
65K 132x132 Color Dot Matrix LCD Controller/Driver

Product Description

The ST7637 is a driver & controller LSI for 65K color graphic dot-matrix liquid crystal display systems. It generates 396 Segment and 132 Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral Interface (SPI) or 8-bit/16-bit parallel display data and stores in an on-chip display data RAM. It performs display data RAM read/write operation with no external operating clock to minimize power consumption. In addition, because it contains power supply circuits necessary to drive liquid crystal, it is possible to make a display system with the fewest components.

  • Driver Output Circuits
    - 396 segment outputs / 132 common outputs
  • Applicable Duty Ratios
    - Various partial display
    - Partial window moving & data scrolling
  • Gray-Scale Display
    - 4FRC & 31 PWM function circuit to display 64 gray-scale display
    - Support 8 color mode (Idle mode)
  • On-chip Display Data RAM
    - Capacity: 132 x 132 x 16 =278,784 bits
  • Color support by Interface
    - 256 color (RGB)=(332) mode
    - 4k colors (RGB)=(444) mode
    - 65K colors (RGB)=(565) mode
    - Truncated 262K colors (RGB)=(666) mode
    - Truncated 16M colors (RGB)=(888) mode
  • Microprocessor Interface
    - 8/16-bit parallel bi-directional interface with 6800-series or 8080-series
    - 4-line serial interface
    - 3-line (9-bits) serial interface
  • On-chip Low Power Analog Circuit
    - On-chip oscillator circuit
    - Voltage converter (x2, x3, x4, x5, x6, x7, x8) with internal booster capacitors.
    - Extremely Few Outsider Components. (Required outsider components: 3 Capacitors)
    - On-chip Voltage Regulator
    - On-chip electronic contrast control function
    - Voltage follower (LCD bias: 1/5~1/12)
  • Operating Voltage Range
    - Supply Digital Voltage (VDD, VDD1): 1.65 to 3.0V
    - Supply Analog Voltage (VDD2, VDD3, VDD4, VDD5): 2.4 to 3.3V
    - LCD driving voltage (VOP = V0 - VSS): Max: 18V
  • LCD Driving Voltage (OTP)
    - Contrast Adjustment Value is stored in the Built-In
    OTP-ROM for better display quality.
  • LCD Driving setting suggestion
    - VOP = 14V, BIAS=1/9. (VDD=2.8V)
  • Package Type
    - Application for COG