S5T8808A

PLL FREQUENCY SHNTHESIZER FOR PAGER S5T8808A INTRODUCTION S5T8808A is a superior low-power-programmable PLL frequency synthesizer which can be used in a high performance Wide Area Pager system. S5T8808A consists of 2 kinds of divider block including a 17bit Shift register, 16-bit Latch, 14/16-bits Counter, Prescaler, and a phase detector block including a Phase detector, Lock detector and a Charge pump. 16−TSSOP−0044 FEATURES Maximum operating frequency: 120MHz @ 500mVP-P, VDD1 = 0.95V, VDD2 = 3.0V 165MHz @ 500mVP-P, VDD1 = 1.0V, VDD2 = 3.0V ( Magnification = 1 : 4 ) On-chip reference oscillator supports external crystal which oscillates up to 18MHz Superior supply current: FFIN = 90MHz, IDD1 = 0.6mA (Typ.) @ VDD1 = 1.0V, VDD2 = 3.0V FFIN = 150MHz, IDD1 = 0.9mA (Typ.) @ VDD1 = 1.0V, VDD2 = 3.0V Operating voltage: VDD1 = 0.95 ~ 2.0V and VDD2 = 2.0 ~ 3.3V Reference frequency counter divider range: 1 / 28 ~ 1 / 65532 (Multiple 4) But, the Divider range with FRC_High state: 1 / 7 ~ 1 / 16383 RX frequency counter divider range: 1 / 28 ~ 1 / 65535 Package type: 16−TSSOP (0.65mm) ORDERING INFORMATION Device +S5T8808A01-R0B0 +: New Product Package 16−TSSOP−0044 Operating Temperature −25°C to +75°C 1 S5T8808A PLL FREQUENCY SHNTHESIZER FOR PAGE BLOCK DIAGRAM OSCI 1 OSCO 2 VDD1 VDD2 Amp 14-Bit Divider ( R - counter ) FnFr Lock Detector 15 10 Fr LDT FRC 14 VDD2 3 16-Bit Latch NC 16 Schmitt Trigger 16 Phase Detector EN DATA CLK 13 12 11 4 16 Cha...