General Description

The PMB 2341 is a monolithic, low power, high performance phase-locked-loop (PLL) frequency synthesizer. It is primarily designed to be used for very stable low noise LO signals in mobile communication systems such as GSM, PCN (GSM 1800), PCS and PDC. The wide range of divider rations also allows application in modern analog systems.

Features

■ B6HFC BiCMOS technology

■ 2.7 to 4.5 V operation

■ Low operating power consumption

■ Programmable power down modes

■ High input sensitivity and high input frequencies up to 2.5 GHz

■ Reference frequencies up to 100 MHz.

■ Programmable dual modulus prescaler divide ratio (1:64/65 or 1:32/33).

■ Dividing ratios: A, N, R counter: 0 to 63, 3 to 4095, 3 to 4095, respectively

■ Fast phase detector with switchable polarity

■ charge pump output with programmable current and without dead zone

■ Fast serial 3-wire bus interface with low threshold voltage Schmitt-Trigger inputs

■ One multi-functional port

■ Very small Mini-TSSOP-10 Package