LC7152 PLL Frequency Synthesizer
Universal Dual-PLL Frequency Synthesizers
Overview
The LC7152, 7152M, 7152NM, 7152KM are universal dual-PLL frequency synthesizers for use in weak signal type cordless telephone applications in the USA, South Korea, and Japan, and broadcast satellite (BS) tuners in the USA and Europe.
Features
. Dual charge pump built in for fast channel switching
. Digital lock detector enables PLL lock status check with crystal oscillator precision
. Programmable reference frequency divider supports various applications
. The LC7152NM is a built-in power-on reset circuit version of the LC7152M
. The LC7152KM is an enhanced frequency characteristics version of the LC7152M
Functions
. 2-system PLL built-in (dual PLL)
. 16-bit programmable local-oscillator divider 1.5 to 55 MHz (V DD = 2.0 to 3.3 V), LC7152KM: 55 to 80 MHz (V DD = 2.7 to 3.3 V)
. 14-bit programmable reference-frequency divider 320 Hz to 640 kHz reference frequency using a 10.24 MHz crystal oscillator
. Digital lock detector
. Dual charge pump
. Amplifier built-in for an active LPF
. Serial transmission data input (CCB format)
. LC7152NM with power-on reset circuit (pins OUTA and OUTB become open at power-on)
. 2.0 to 3.3 V supply voltage
. DIP24S and MFP24S packages
Serial Data Input Timing
Divide Ratio of Reference Divider
Divide Ratio of Programmable Divider
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