1.3GHZ DUAL PLL

S1T8825B

1

INTRODUCTION

The S1T8825B is a high performance dual frequency synthesizer with

two integrated high frequency pre-scalers for RF operation up to 1.3

GHz.

The S1T8825B is composed of modulus pre-scalers providing 64 and

66, no dead-zone PFD, selectable charge pump current, selectable

power down mode circuits, lock detector output, and loop filter’s time

constant switch.

It is fabricated using the ASP5HB Bi-CMOS process and is available

16-TSSOP with surface mount plastic packaging. Serial data is trans-

ferred into the S1T8825B via three-wire interface (CK, DATA, EN).

FEATURES

•

Two systems for receiver and transmitter

•

Very low operating current consumption: Icc = Typ. 7.0mA @ 3.0V

•

Low operating power supply voltage : 2.2 to 5.5V ( 200MHz to 550MHz Operating )

2.7 to 3.6V ( 550MHz to 1.3GHz Operating )

•

Modulus pre-scaler: 64 / 66

•

No dead-zone PFD

•

Colpitts type local oscillation

•

Selectable charge pump current

•

Selectable power down mode

•

TSSOP 16-pin package (0.65 mm pitch)

ORDERING INFORMATION

+: New Product

APPLICATIONS

•

Cordless telephone systems

•

Portable wireless communications (PCS)

•

Wireless Local Area Networks (WLANs)

•

Other wireless communication systems

Device

Package

Operating Temperature

+S1T8825B01-R0B0

16

−TSSOP−0044

−30 °C to + 85 °C

16

−TSSOP−0044