LOW-POWER PLL FREQUENCY SYNTHESIZER WITH POWER SAVE FUNCTION (1.1GHz)

The Fujitsu MB1503 is a serial input phase-locked loop (PLL) frequency synthesizer with a pulse-swallow function. A stand-by mode is provided to limit power consumption during intermittent operation.

The MB1503 is configured of a 1.1GHz dual-modulus prescaler with 128/129 divide ratio, control signal generator, 16-bit shift register, 15-bit latch, programmable reference divider (binary 14-bit programmable reference counter), 1-bit switch counter, phase comparator with phase conversion function, charge pump, crystal oscillator, 19-bit shift register, 18-bit latch, programmable divider (binary 7-bit swallow counter and binary 11-bit programmable counter), analog switches, and an intermittent operation control circuit that selects the operating or stand-by mode depending on the power-save control input state (PS).

The MB1503 operates from a single +5 V supply. Fujitsu’s advanced technology achieves an Icc of 8mA, typical. The stand-by mode current consumption is just 100µA.

Features

• High operating frequency : fIN = 1.1GHz (PIN = –10dBm)

• Pulse-swallow function : High-speed dual-modulus prescaler with 128/129 divide ratio

• Low supply current : ICC = 8mA typ. at 5V

• Power-saving stand-by mode : 100µA

• Serial input, 18-bit programmable divider consisting of:

– Binary 7-bit swallow counter : 0 to 127

– Binary 11-bit programmable counter : 16 to 2,047

• Serial input 15-bit programmable reference divider consisting of:

– Binary 15-bit programmable reference counter: 8 to 16,383

– 1-bit switch counter sets prescaler divide ratio

• On-chip analog switch for fast lock-up

• On-chip charge pump

• Wide operating temperature range: –40 to +85°C

• Plastic 16–pin dual inline package (Suffix : –P)

Plastic 16–pin small outline package (Suffix : –PF)