LC723481W

www.DataSheet4U.com Ordering number : ENN7253 CMOS IC LC723481W,723482W,723483W Low-Voltage ETR-Controller Overview The LC723481W, 723482W, and 723483W are lowvoltage electronic tuning radio microcontrollers that include a PLL that operates up to 250 MHz and a 1/4 duty 1/2 bias LCD driver on chip. These ICs include an on-chip DC-DC converter, making it is easy to create the supply voltages required for tuning and allowing cost reductions in end products. These ICs are optimal for use in low-voltage portable audio equipment that includes a radio receiver. Package Dimensions unit: mm 3190A-SQFP64 [LC723481W/2W/3W] 0.5 12.0 10.0 48 49 33 32 Function Program memory (ROM): — 2048 × 16 bits (4K bytes) LC723481W — 3072 × 16 bits (6K bytes) LC723482W — 4096 × 16 bits (8K bytes) LC723483W Data memory (RAM): — 128 × 4 bits LC723481W — 192 × 4 bits LC723482W — 256 × 4 bits LC723483W Cycle time: 40 µs (all 1-word instructions) at 75kHz crystal oscillation Stack: 4 levels (8 levels) LC723481W(LC723482W/3W) LCD driver: 48 to 80 segments (1/4 duty, 1/2 bias drive) Interrupts: One external interrupt Timer interrupts (1, 5, 10, and 50 ms) A/D converter: Three input channels (5-bit successive approximation conversion) Input ports: 7 ports (of which 3 can be switched for use as A/D converter inputs) Output ports: 6 ports (of which 1 can be switched for use as the beep tone output and 2 are opendrain ports) Continued on next page. 64 1 (0.5) (1.25) (1.5) 17 16 0.18 0.1...