Samsung S5T8808X01-V0B0 Datasheet
PLL FREQUENCY SHNTHESIZER FOR PAGER S5T8808
INTRODUCTION
16−SSOP−0044
S5T8808 is a superior low-power-programmable PLL frequency
synthesizer which can be used in a high performance Wide Area
Pager system.
KS8808 consists of 2 kinds of divider block including a 17-bit 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.
FEATURES
(Magnification = 1 : 4)
• Maximum operating frequency:
150MHz @ 500mV
180MHz @ 500mV
P-P
P-P
, V
, V
DD1
DD1
= 0.95V
= 1.0V
• On-chip reference oscillator supports external crystal which oscillates up to 18MHz
• Superior supply current: (V
— F
— F
— F
• Operating voltage: V
= 90MHz, I
FIN
= 150MHz, I
FIN
= 180MHz, I
FIN
= 0.6mA (Typ.)
DD1
DD1
DD3
DD1
DD1
= V
= 1.0V, V
DD2
= 0.9mA (Typ.)
= 1.1mA (TyP.)
= 0.95 ~ 2.0V and V
= 3.0V)
DD3
= 0.95V ~ 2.0V and V
DD2
= 2.0V ~ 3.3V
DD3
• 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-SSOP (0.8mm)
ORDERING INFORMATION
Device Package Operating Temperature
S5T8808X01-V0B0 16−SSOP−0044 −25°C to +75°C
1
S5T8808 PLL FREQUENCY SHNTHESIZER FOR PAGE
BLOCK DIAGRAM
VDD2
OSCI
1
Amp
¡Ü
¡Ü
14-Bit Divider
( R - counter )
¡Ü
15
¢º
Fr
OSCO
VDD3
NC
EN
CLK
VSS
2
3
16
13
12
11
6
VDD1
VDD3
Schmitt
Trigger
¢º
¢º
¢º
¢º
FRC FnFr
¢º
¢º
¢º
¢º
14
16-Bit Latch
¢º
Shift Register
17- Bit
16
¢º
16-Bit Latch
16
¢º
¡Ü
*
¢º
Phase
Detector
¢º
Lock
Detector
¢º
Charge
Pump
10
¢º
¢º
¢º
LDT
4
PDA
5
PDP
2
Fin
VDD1
16
¢º
7
¡Ü
Amp
8
VDD1 VDD2
¡Ü
16-Bit Divider
( N - counter )
FnFr
¢º
9
VDD2
14
¢º
Fn
PLL FREQUENCY SHNTHESIZER FOR PAGER S5T8808
PIN CONFIGURATION
OSCI
OSCO
V
DD3
PDA
PDP
V
SS
Fin
VDD1
1
2
3
4
5
6
7
8
S5T8808
KS8808D
16
15
14
13
12
11
10
9
NC
Fr
Fn
EN
DATA
CLK
LDT
V
DD2
3
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