LC72344W

Ordering number : ENN6171 CMOS IC LC72344W, 72345W Low-Voltage ETR Controller with On-Chip DC-DC Converter Overview The LC72344W and LC72345W are low-voltage electronic tuning microcontrollers that include a DC-DC converter, a PLL that operates up to 230 MHz, a 1/4 duty 1/2 bias LCD driver and other functions on chip. The built-in DC-DC converter provided by these ICs can easily implement a tuning system voltage generator circuit, and furthermore, since the transistor required for the low-pass filter is built in, these ICs can contribute to further end product cost reductions. Additionally, the DC-DC converter output voltage can be provided to other external ICs, making these products optimal for low-voltage portable audio equipment that includes a radio receiver. Package Dimensions unit: mm 3190-SQFP64 [LC72344W, 72345W] 12.0 10.0 1.25 48 49 0.5 0.18 1.25 33 32 0.15 12.0 10.0 0.5 1.25 64 17 1 16 Functions Program memory (ROM): 3072 × 16 bits (6 KB) LC72344W 4096 × 16 bits (8 KB) LC72345W Data memory (RAM): 192 × 4 bits LC72344W 256 × 4 bits LC72345W Cycle time: 40 µs (all 1-word instructions) Stack: 8 levels LCD driver: 48 to 76 segments (1/4 duty, 1/2 bias drive) Interrupts: One external interrupt Timer interrupts (1, 5, 10, and 50 ms) A/D converter: Two input channels (5-bit successive approximation conversion) Input ports: 6 ports (of which 2 can be switched for use as A/D converter inputs) Output ports: 6 ports (of which 1 can be switched f...