LM1246DEW/NA DIP-24 Signal Processing Chip IC

Description

LM1246DEW/NA DIP-24 Signal Processing Chip IC The LM1246 is a high-performance, 150 MHz integrated CMOS CRT preamplifier designed for modern CRT displays. It features an I²C compatible interface, allowing a microcontroller to digitally control all parameters necessary for video setup and adjustment, including gain and contrast. ✨Features High-Speed Operation: 150 MHz channel bandwidth. Full OSD Capability: Internal 512 character OSD ROM. Internal 512 character OSD RAM. Fully addressable 512 character OSD. Features like OSD Window Fade In/Fade Out and Half Tone Transparency. Digital Control: Enhanced I²C compatible microcontroller interface. Integrated DACs: Four 8-bit resolution DAC outputs for bus controlled CRT bias and brightness. System Integration: Matched for use with LM246x drivers and LM2479/80 bias IC’s. Video Data dectection for Auto Centering & Sizing. OSD override allows OSD messages to override video. Blanking Control: Horizontal and vertical blanking and OSD synchronization directly from deflection signals. Vertical blanking duration is register programmable. 4-Bit Programmable start position for internal Horizontal Blanking. Protection & Power: Spot killer which blanks the video outputs when V CC falls below the specified threshold. Power Saving Mode with 65% power reduction. ESD protection of 3.0 kV. 📋Specifications Parameter Value Operating Conditions Supply Voltage (V CC ) 4.75V to 5.25V Operating Temperature Range 0°C to +70°C Video Inputs (pk-pk) 0.0V to 1.0V Video Performance Channel Bandwidth (-3 dB, Typ) 150 MHz Video Rise Time (Typ) 3.1 ns Video Fall Time (Typ) 2.9 ns Maximum Voltage Gain (Typ) 4.1 V/V Maximum Contrast Attenuation (Typ) -20 dB Maximum Gain Match between Channels ±0.5 dB Power Consumption Supply Current (Typ) 200 mA Supply Current (Power Save Mode, Typ) 70 mA DAC Outputs Resolution 8-bit Min Output Voltage 0.5V (Min), 0.7V (Max) Max Output Voltage (Mode 00) 3.7V (Min), 4.2V (Max) Max Load Current ±1.0 mA System Interface Horizontal Frequency (Min) 25 kHz Horizontal Frequency (Max) 110 kHz Package 24-lead DIP 🎯 Applications Low-end 15″ and 17″ bus-controlled monitors that require OSD . 1024×768 displays running up to 85 Hz that need OSD capability . Very low-cost monitor systems using the LM246x driver . DataSheet LM1246

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