OVERVIEW

The SM5170AV is a PLL synthesizer IC developed for application in pagers. It incorporates independently-controlled reference frequency and FIN input frequency dividers, and operates from a low-voltage supply to realize low power dissipation. It features a charge pump that operates at 3 V, making possible a wide range of VCO designs.

FEATURES

■ Supply voltages

• VDD1 = 0.95 to 1.2 V (prescaler, counters)

• VDD2 = 2.0 to 3.3 V (charge pump)

■ FIN input frequency

• fFIN = 300 MHz (VDD1 = 0.95 V)

• fFIN = 330 MHz (VDD1 = 1.0 V)

■ Reference frequency

• fXIN = 25 MHz (VDD1 = 0.95 V)

■ 20 to 262140 reference frequency divider ratio range (with 1/4 prescaler built-in)

■ 1056 to 131071 FIN input frequency divider ratio range

■ −10 to 60 °C operating temperature range

■ 16-pin VSOP