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LMX2330A Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LMX2330A
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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LMX2330A Datasheet(HTML) 2 Page - National Semiconductor (TI)

 
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Connection Diagram
Pin Description
Pin
No.
Pin
Name
I/O
Description
1V
CC1
Power supply voltage input for RF analog and RF digital circuits. Input may range from 2.7V to
5.5V. V
CC1 must equal VCC2. Bypass capacitors should be placed as close as possible to this
pin and be connected directly to the ground plane.
2V
P1
Power Supply for RF charge pump. Must be
≥ V
CC.
3D
o RF
O
Internal charge pump output. For connection to a loop filter for driving the input of an external
VCO.
4
GND
Ground for RF digital circuitry.
5f
IN RF
I
RF prescaler input. Small signal input from the VCO.
6f
IN RF
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. Capacitor is optional with some loss of
sensitivity.
7
GND
Ground for RF analog circuitry.
8
OSC
in
I
Oscillator input. The input has a V
CC/2 input threshold and can be driven from an external CMOS
or TTL logic gate.
9
GND
Ground for IF digital, MICROWIRE,F
oLD, and oscillator circuits.
10
F
oLD
O
Multiplexed output of the RF/IF programmable or reference dividers, RF/IF lock detect signals
and Fastlock mode. CMOS output
(see Programmable Modes).
11
Clock
I
High impedance CMOS Clock input. Data for the various counters is clocked in on the rising
edge, into the 22-bit shift register.
12
Data
I
Binary serial data input. Data entered MSB first. The last two bits are the control bits. High
impedance CMOS input.
13
LE
I
Load enable high impedance CMOS input. When LE goes HIGH, data stored in the shift registers
is loaded into one of the 4 appropriate latches (control bit dependent(.
14
GND
Ground for IF analog circuitry.
15
f
IN IF
I
IF prescaler complementry input. A bypass capacitor should be placed as close as possible to
this pin and be connected directly to the ground plane. Capacitor is optional with some loss of
sensitivity.
16
f
IN IF
I
IF prescaler input. Small signal input from the VCO.
17
GND
Ground for IF digital, MICROWIRE, F
oLD, and oscillator circuits.
18
D
o IF
O
IF charge pump output. For connection to a loop filter for driving the input of an external VCO.
19
V
P2
Power Supply for IF charge pump. Must be
≥ V
CC.
Thin Shrink Small Outline Package (TM)
DS012331-2
Order Number LMX2330ATM, LMX2331ATM or LMX2332ATM
NS Package Number MTC20
www.national.com
2


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