KS8805 Serial Input PLL Frequency Synthesizer

INTRODUCTION:
The KS8805B is a superior low power-programmable dual frequency synthesizer (PLL) which can be used in high performance CT-1 cord-less phone system with frequency range under 60 MHz in all over the world.
This device has two independent phase detectors and channel divider block for transmitter and receiver part. It includes reference divider and auxiliary reference divider to generate independent reference frequency using a common reference oscillator. If required, all divider blocks can be fully programmed through MICOM serial interface.
FEATURES:
á Operating voltage range : 3.0 ~ 5.5V
á Superior supply current : 2.5mA (Typ) at 3.0V
á Included power saving mode function which can control the each register block according to program data of MICOM
á Included clock output with frequency of X-tal OSC ü3 /ü 4 for MICOM or other system and clock output on / off control by MICOM
á Superior Max operating frequency range : 60MHz at 300 mVp-p, VDD = 3.0V
á Internal reference oscillator can support the external X-tal which oscillates up to 16MHz
á Built - in Lock detect signal output
á Internal reference divider range : 16 ~ 4095
á Internal Auxiliary reference divider range : 16 ~ 16383
á Internal RX (TX) divider range : 16 ~ 65535

Pin	Name	Description
1	CLK	Clock from CPU
2	AUX DI
3	Data	Data from CPU
4	ST	Strobe from CPU
5	fMCU	Clock output terminal. This output pin provides the clock source for Micom or other system as an output of X - tal OSC ü 3 / ü 4. Which can be controlled by the bit of the control register. Clock output on / off control is possible by MICOM.
6	GND	Ground
7	RI	X-tal Oscillator Input
8	RO	X-tal Oscillator Output
9	RIF	á Input terminal of RX channel counter. á Usually, AC coupled output signal of VCO loop is introduced and the Minimum input signal level is 300mVp-p at 60 MHz
10	PDR	á There are 3 - kind output signal states in PDR pin. - If fRX > fREF (fRX is leading), the output is negative pulse state - If fRX < fREF (fRX is lagging), the output is positive pulse state - If fRX = fREF (the same phase), the output is high impedance state
11	PWDRX	á This output terminal offers the state of internal RX channel counter operation. If this pin state is high, internal RX channel counter is operating in power saving mode. So, this pin can be used in appling the power switch on / off control.
12	V_DD	Power supply input terminal
13	PWDTX	If this pin state is high, internal TX channel counter is operating in power saving mode. So, this pin can be used in appling the power switch on / off control.
14	TIF	á Usually, AC coupled output signal of VCO loop is introduced and the Minimum input signal level is 300mVp-p at 60 MHz
15	PDT	á There are 3 - kind output signal states in PDT pin. - If fTX > fREF (fTX is leading), the output is negative pulse state - If fTX < fREF (fTX is lagging), the output is positive pulse state

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