LC723461W

www.DataSheet.co.kr Ordering number : ENN*7275 CMOS IC LC723461W, 723462W Ultralow-Voltage ETR Controller with On-Chip LCD Driver Preliminary Overview The LC723461W and LC723462W are ultralow-voltage electronic tuning microcontrollers that include a PLL that operates up to 250 MHz and a 1/4 duty 1/2 bias LCD driver on chip. This IC includes an on-chip DC-DC converter that can easily create the power supply voltages needed for electronic tuning and contribute to reducing end product costs. This IC is optimal for portable audio equipment that must operate from a single battery. switched for use as serial I/O ports) Can be switched for CMOS output/open-drain outputs. Serial I/O: One system (LC723462) PLL: Reference frequencies: 1, 3, 3.125, 5, 6.25, 12.5, and 25 kHz Input frequencies: FM band: 10 to 250 MHz AM band (high): 2 to 20 MHz AM band (low): 0.5 to 10 MHz Input sensitivity: FM band: 35 mVrms (10 mVrms at 130 MHz), 50 mVrms (130 to 250 MHz) AM band (high, low): 35 mVrms IF count: HCTR input pin: 0.4 to 12 MHz (HCTR can be switched to function as a general-purpose input port.) Continued on next page. Function Program memory (ROM): — 4096 × 16 bits (8K bytes) : LC723461 — 6144 × 16 bits (12K bytes): LC723462 Data memory (RAM): — 256 × 4 bits: LC723461 — 512 × 4 bits: LC723462 Cycle time: 40 µs (all 1-word instructions) at 75kHz crystal oscillation Stack: 8 levels LCD driver: 48 to 80 segments (1/4 duty, 1/2 bias drive) Interrupts: Two external inter...