LC75710NE Dot Matrix VFD Display Driver TQFP-64

LC75710NE Dot Matrix VFD Display Driver is a high-performance integrated circuit specifically designed to simplify the control and driving of Vacuum Fluorescent Displays (VFDs). This chip acts as a powerful interface between a microcontroller (MCU) and the complex grid and segment structure of a VFD, supporting up to 32 x 16 dot matrix or equivalent custom display configurations. By integrating necessary high-voltage drivers, dimming control, and serial communication capabilities (typically I²C or SPI), the LC75710NE significantly reduces component count and complexity in your design. You can achieve vibrant, clear display output quickly and efficiently, making it an excellent choice for consumer electronics and industrial devices that require appealing visual feedback.

Key Features:

• High Drive Capacity: Directly drives the high-voltage grids and segments required by VFDs, eliminating the need for external driver transistors.
• Large Display Support: Handles dot matrix displays up to 32 x 16 segments or 16-digit, 16-segment displays, offering flexibility for complex visual layouts.
• Serial Data Interface: Utilizes a compact serial interface (often 3-wire or 4-wire) to receive display data from the host MCU, minimizing required control pins.
• Built-in Dimming Control: Incorporates a pulse width modulation (PWM) dimming function, allowing you to easily adjust display brightness for various ambient light conditions.
• On-Chip Key Scan Function: Often includes an integrated key scanning feature to process input from a keypad, further simplifying the overall system design.

Technical Specifications:

• Operating Voltage (Logic): 3.0 V to 5.5 V DC
• Display Output Voltage: Up to ≈ 40 V to 60 V (VFD drive voltage)
• Output Channels (Grid/Segment): Typically 48 outputs (32 segments and 16 grids, or similar configuration)
• Clock Frequency (Max): Varies, generally up to a few MHz for serial communication.
• Interface: Serial Input (e.g., DIN, CLK, STB)

Mechanical Specifications:

• Package Type: TQFP-64 (Thin Quad Flat Package, 64-pin)
• Lead Pitch: Often 0.8 mm or 0.5 mm (Surface Mount Device)
• Mounting: Surface Mount Technology (SMT) required.

Dimensions:

• Body Size: Varies (Standard TQFP-64 is often 10 mm x 10 mm or 12 mm x 12 mm)
• Height: ≈ 1.0 mm to 1.4 mm
• Weight: ≈ 0.5 g

Pinout and Wiring:

• V_DD/V_SS: Logic Power Supply Input / Ground.
• V_DISP: High Voltage Supply for VFD Segments and Grids.
• DIN/CLK/STB: Serial Data Input, Clock Input, and Strobe/Latch Input for communicating with the MCU.
• SEG₀ to SEG_n: Segment Output Pins (Connect directly to VFD segments).
• GRD₀ to GRD_m: Grid Output Pins (Connect directly to VFD grids).
• K₀ to K_p: Key Input Pins (If key scan function is used).

Datasheet Reference:

• Download LC75710NE VFD Driver Datasheet

Commonly Used in:

• Home Audio Equipment: Driving status displays on stereo receivers, amplifiers, and CD players.
• Automotive Dashboards: Controlling clear, high-contrast VFD status indicators in car radios and clock displays.
• Industrial Control Panels: Providing durable, bright information panels in machinery and testing equipment.

Applications:

• Multi-Function Clocks and Timers: Displaying time, date, and alarm status with distinct clarity.
• Consumer Appliances: Implementing feedback displays in microwaves, air conditioners, and washing machines.
• Custom Dot Matrix Message Displays: Creating scrolling text or graphical icons for compact devices.

Equivalent Models:

• PT6955 / PT6958: Other common serial VFD/LED drivers with similar segment/grid configurations.
• MAX6921 / MAX6923: Maxim Integrated VFD drivers, often used for more complex, high-reliability designs.
• TM16xx Series (e.g., TM1638): Simpler LED/VFD drivers sometimes used as a substitute for basic display needs.

Package Includes:

• 1 x LC75710NE Dot Matrix VFD Display Driver (TQFP-64)