LMX2331UEVAL National Semiconductor, LMX2331UEVAL Datasheet - Page 4

• Manufacturer Part Number: LMX2331UEVAL
• Manufacturer: National Semiconductor

Specifications of LMX2331UEVAL

• Lead Free Status / Rohs Status: Not Compliant

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Name
f
OSC
Clock
V
F
f
f
D
IN
GND
GND
Data
GND
GND
Pin Descriptions
IN
IN
V
Pin
NC
LE
o
P
o
CC
LD
RF
IF
IF
IF
IF
in
20-Pin UTCSP
Pin No.
10
11
12
13
14
15
16
17
18
19
5
6
7
8
9
X
24-Pin CSP
1, 9, 13, 21
Pin No.
(Continued)
10
11
12
14
15
16
17
18
19
20
22
23
6
7
8
20-Pin TSSOP
Pin No.
10
11
12
13
14
15
16
17
18
19
20
X
6
7
8
9
I/O
—
—
—
—
—
—
—
O
O
I
I
I
I
I
I
I
4
RF PLL prescaler complementary input. For single ended
operation, this pin should be AC grounded. The LMX233xU RF
PLL can be driven differentially when the bypass capacitor is
omitted.
Ground for the RF PLL analog circuitry.
Reference oscillator input. The input has an approximate V
threshold and can be driven from an external CMOS or TTL logic
gate.
Ground for the IF PLL digital circuits, MICROWIRE
oscillator circuits.
Programmable multiplexed output pin. Functions as a general
purpose CMOS TRI-STATE output, RF/IF PLL push-pull analog
lock detect output, N and R divider output or Fastlock output,
which connects a parallel resistor to the external loop filter.
MICROWIRE Clock input. High impedance CMOS input. Data is
clocked into the 22-bit shift register on the rising edge of Clock.
MICROWIRE Data input. High impedance CMOS input. Binary
serial data. The MSB of Data is shifted in first. The last two bits
are the control bits.
MICROWIRE Latch Enable input. High impedance CMOS input.
When LE transitions HIGH, Data stored in the shift register is
loaded into one of 4 internal control registers.
Ground for the IF PLL analog circuitry.
IF PLL prescaler complementary input. For single ended
operation, this pin should be AC grounded. The LMX233xU IF
PLL can be driven differentially when the bypass capacitor is
omitted.
IF PLL prescaler input. Small signal input from the VCO.
Ground for the IF PLL digital circuitry, MICROWIRE, F
oscillator circuits.
IF PLL charge pump output. The output is connected to the
external loop filter, which drives the input of the VCO.
IF PLL charge pump power supply. Must be ≥ V
Power supply bias for the IF PLL analog and digital circuits,
MICROWIRE, F
2.7V to 5.5V. Bypass capacitors should be placed as close as
possible to this pin and be connected directly to the ground
plane.
No connect.
o
LD, and oscillator circuits. V
Description
CC
CC
may range from
.
™
, F
o
LD, and
o
LD, and
CC
/2