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LMX2306 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LMX2306
Description  PLLatinum™ Low Power Frequency Synthesizer for RF Personal Communications
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LMX2306 Datasheet(HTML) 2 Page - National Semiconductor (TI)

 
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Connection Diagrams
Pin Descriptions
16-Pin
TSSOP
16-Pin
CSP
Pin
Name
I/O
Description
115
FL
o
O
FastLock Output. For connection of parallel resistor to the loop filter. (See Section 1.3.4
FASTLOCK MODES description.)
216
CP
o
O
Charge Pump Output. For connection to a loop filter for driving the input of an external VCO.
3
1
GND
Charge Pump Ground.
4
2
GND
Analog Ground.
53
f
IN
I
RF Prescaler Complementary Input. A bypass capacitor should be placed as close as possible to
this pin and be connected directly to the ground plane. The complementary input can be left
unbypassed, with some degradation in RF sensitivity.
64
f
IN
I
RF Prescaler Input. Small signal input from the VCO.
75
V
CC1
Analog Power Supply Voltage Input. Input may range from 2.3V to 5.5V. Bypass capacitors should
be placed as close as possible to this pin and be connected directly to the ground plane. V
CC1
must equal V
CC2.
8
6
OSC
IN
I
Oscillator Input. This input is a CMOS input with a threshold of approximately V
CC/2 and an
equivalent 100k input resistance. The oscillator input is driven from a reference oscillator.
9
7
GND
Digital Ground.
10
8
CE
I
Chip Enable. A LOW on CE powers down the device and will TRI-STATE the charge pump output.
Taking CE HIGH will power up the device depending on the status of the power down bit F2. (See
Section 1.3.1 POWERDOWN OPERATION and Section 1.7.1 DEVICE PROGRAMMING AFTER
FIRST APPLYING V
CC.)
11
9
Clock
I
High Impedance CMOS Clock Input. Data for the various counters is clocked in on the rising edge
into the 21-bit shift register.
12
10
Data
I
Binary Serial Data Input. Data entered MSB first. The last two bits are the control bits. High
impedance CMOS input.
13
11
LE
I
Load Enable CMOS Input. When LE goes HIGH, data stored in the shift registers is loaded into one
of the 3 appropriate latches (control bit dependent).
14
12
Fo/LD
O
Multiplexed Output of the RF Programmable or Reference Dividers and Lock Detect. CMOS output.
(See
Table 4.)
15
13
V
CC2
Digital Power Supply Voltage Input. Input may range from 2.3V to 5.5V. Bypass capacitors should
be placed as close as possible to this pin and be connected directly to the ground plane. V
CC1
must equal V
CC2.
16
14
V
P
Power Supply for Charge Pump. Must be
≥ V
CC.
LMX2306/16/26
DS100127-2
16-Lead (0.173” Wide) Thin Shrink Small Outline
Package(TM)
Order Number LMX2306TM, LMX2306TMX,
LMX2316TM, LMX2316TMX,
LMX2326TM or LMX2326TMX
See NS Package Number MTC16
LMX2306/16/26
DS100127-19
16-pin Chip Scale Package
Order Number LMX2306SLBX, LMX2316SLBX or
LM2326SLBX
See NS Package Number SLB16A
www.national.com
2


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