• Device Type: Fluorescent Display / LCD Segment Driver
• Package Type: DIP-40
• Technology: High-Voltage Bipolar Driver IC

General Features

• 34 high-voltage output channels
• Serial data input
• Built-in shift register and latch
• High-current sink driver outputs
• Designed for multiplexed display systems
• Cascade connection capability for larger displays

Electrical Characteristics

• Logic Supply Voltage (VDD):
  • 4.5 V to 5.5 V
  • Typical: 5 V
• Output Supply Voltage (VBB):
  • Up to 50 V
• Output Current Capability:
  • Up to 25 mA per output (typical application)
• Logic Input Levels:
  • TTL/CMOS compatible

Internal Functions

• 34-bit shift register
• 34-bit data latch
• Output driver stage
• Serial data transfer
• Latch enable control
• Output enable control

Interface Signals

• DATA IN (DIN) – Serial data input
• CLOCK (CLK) – Shift clock input
• LATCH (STB) – Data latch strobe
• OUTPUT ENABLE (OE) – Output control
• DATA OUT (DOUT) – Cascade output

Output Characteristics

• Number of Outputs: 34
• Open-collector/high-voltage outputs
• Suitable for direct driving of:
  • Vacuum Fluorescent Displays (VFD)
  • Fluorescent indicators
  • LED arrays (with appropriate supply circuitry)

Package Information

• Package Type: PDIP
• Pin Count: 40 Pins
• Mounting Style: Through-Hole

Operating Temperature

• Commercial Range:
  • -20°C to +75°C

Typical Applications

• Vacuum fluorescent display (VFD) modules
• Audio equipment front panels
• VCR displays
• CD player displays
• Microwave oven displays
• Industrial display panels
• Instrumentation displays
• Consumer electronics indicators