General Description

The PMB 2304R PLL is a high speed CMOS IC, especially designed for use in battery powered radio equipment and mobile telephones and serves as a functional replacement of the PMB 2307R. The primary applications are in digital cellular and cordless systems e.g. GSM 900/1800/1900 and DECT systems. The wide range of dividing ratios also allows application in analog systems.

Features

■ Low operating current consumption (typically 3.5 mA)

■ High input sensitivity, high input frequencies (220 MHz)

■ Extremely fast phase detector without dead zone

■ Linearization of the phase detector output by current sources

■ Synchronous programming of the counters (N-, N/A-, R-counters) and system parameters

■ Fast modulus switchover for 65-MHz operation

■ Switchable modulus trigger edge

■ Serial control (3-wire bus: data, clock, enable) for fast programming (fmax ~ 10 MHz)

■ Large dividing ratios for small channel spacing A counter 0 to 127 N counter 3 to 16.383 R counter 3 to 65.535

■ Serial control (3-wire bus: data, clock, enable) for fast programming (fmax ~ 10 MHz)

■ Switchable polarity and phase detector current programmable

■ 2 Multifunction outputs frn, fvn outputs of the R- and N/A- counters for test

■ Output port (e.g. for standby of the prescaler)

■ External current setting for PD output

■ Lock detect output with quasidigital lock detect

Application

■ GSM 900 / 1800 / 1900

■ DECT

■ Analog systems