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MB1508 PLL Frequency Synthesizer

PIN-description
SERIAL INPUT PLL FREQUENCY SYNTHESIZER ON CHIP 2.5 GHz PRESCALER DESCRIPTION

The MB1508 with an on chip 2.5 GHz dual modulus prescaler is a serial input PLL (Phase Locked Loop) frequency synthesizer with pulse swallow function. It is well suited for BS tuner, CATV system, and TV tuner applications.
It operates with a supply voltage of 5.0V typ. and dissipates 16mA typ. of current realized through the use of unique U-ESBIC Bi-CMOS technology.
Block Diagram
FEATURES
&127; Power supply voltage: V CC = 4.5 to 5.5V &127; High operating frequency: f IN = 2.5 GHz (P IN = –4dBm)
&127; 2.5 GHz dual modulus prescaler: P = 256/272, 512/528
&127; Low supply current: I CC = 16mA typ.
&127; Programmable reference divider consisting of:
Binary 2-bit programmable reference counter (R = 256, 512, 1024, 2048)
&127; Programmable divider consisting of:
Binary 5-bit swallow counter (A = 0 to 31)
Binary 12-bit programmable counter (N = 32 to 4095)


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