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LMX2370 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LMX2370
Description  PLLatinum™ Dual Frequency Synthesizer for RF Personal Communications
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LMX2370 Datasheet(HTML) 3 Page - National Semiconductor (TI)

 
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Pin Descriptions (Continued)
Pin No.
Pin
Name
I/O
Description
24-Pin
CSP
20-Pin
TSSOP
16
14
Vµc
Power supply for MICROWIRE circuitry. Must be
≤ V
CC. Typically connected to
same supply level as µprocessor or baseband controller to enable programming at
low voltages.
17
15
GND
Ground for Aux analog circuitry.
18
16
f
IN2
I
Auxiliary prescaler input. Small signal input from the VCO.
19
17
GND
Ground for Aux digital, MICROWIRE, FoLD, and oscillator.
20
18
CP
o2
O
Aux internal charge pump output. For connection to a loop filter for driving the
input of an external VCO.
22
19
Vp2
Power supply for Aux charge pump. Must be
≥ V
CC.
23
20
V
CC2
Power supply voltage input for Aux analog, Aux digital, FoLD, and oscillator
circuits. Input may range from 2.7V to 5.5V. V
CC2 must equal VCC1. Bypass
capacitors should be placed as close as possible to this pin and be connected
directly to the ground plane.
1, 9,
13, 21
NC
No Connect
Block Diagram
DS101026-4
www.national.com
3


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