S5T8809

PLL FREQUENCY SYNTHESIZER FOR PAGER S5T8809 INTRODUCTION S5T8809 is a superior low-power-programmable PLL frequency synthesizer which can be used in high performance / Simple application for a Wide Area Pager system. S5T8809 consists of 2 kinds of divider block including a 19-bit Shift register, 16/18-bit Latch, 13/15bits R-counter and 16/18-bit NCounter, 32/33 Prescaler, and a phase detector block including a Phase detector, Lock detector and a Charge pump. S5T8809 also has a battery saving mode which can control each register block by serial control data from the µ-controller (MICOM) and it also has boost up signal output for fast locking. 16-TSSOP-0044 ( Magnification = 1 : 4 ) FEATURES Maximum operating frequency: 330MHz @ 300mVP-P, VDD1 = 1.0V, VDD2 = 3.0V On-chip reference oscillator supports external crystal which oscillates up to 23MHz Superior supply current: — FFIN = 310MHz, IDD1 = 0.8mA (Typ.) @ VDD1 = 1.0V, VDD2 = 3.0V Operating voltage: VDD1 = 0.95 to 1.5V and VDD2 = 2.0 to 3.3V Excellent Divider range: — Ref. Divider: FRC (0): 1 / 40 to 1 / 65528 (Multiple): Default FRC (1): 1 / 5 to 1 / 32767 — Rx Divider: PBC (0): 1 / 1056 ~ 1 / 65535: Default PBC (1): 1 / 1056 ~ 1 / 262143 Boost-up signal output for Fast Locking In the Standby mode, VDD1 block can be controlled by BSB Pin status — Standby current consumption: 10µA (Max.) Programmable control the output of LD to reduce internal noise Programmable 17 / 19-bit shift register value controll...