LMX2310U National Semiconductor Corporation, LMX2310U Datasheet - Page 3

• Manufacturer Part Number: LMX2310U
• Description: Pllatinum? Ultra Low Power Frequency Synthesizer For Rf Personal Communicationscommunications
• Manufacturer: National Semiconductor Corporation

Pin Descriptions
Pin Number
10
1
2
3
4
5
6
7
8
9
Pin Name
NC
CP
GND
F
F
OSC
NC
OSC
FoLD
Clock
IN
INB
o
IN
OUT
I/O
O Oscillator output. The OSC
O Multi-function CMOS output pin that
— No Connect.
— Analog ground.
— No Connect.
O Charge Pump output. For connection to a
I RF prescaler input. Small signal input
I RF prescaler complementary input. For
I Oscillator input. An input to a CMOS low
I High impedance CMOS Clock input. Data
loop filter for driving the voltage control
input of an external VCO.
from the VCO.
single ended operation, this pin should be
AC grounded. The LMX2310/1/2/3U can
be driven differentially when a bypass
capacitor is omitted.
noise inverting buffer. The input can be
driven from an external CMOS or TTL
logic gate.
buffer drives an independent oscillator
buffer. Its output is connected to the
OSC
provide the reference oscillator frequency
to other circuitry or as a crystal oscillator.
provides multiplexed access to digital lock
detect, open drain analog lock detect, as
well as the outputs of the R and N
counters. The FoLD pin is internally
referenced to V
for the counters is clocked in on the rising
edge, into the 22-bit shift register. The
Clock is internally referenced to V
OUT
pin. It can be used as a buffer to
Description
µC
.
3
IN
low noise
µC
.
I/O Circuit Configuration
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