LMX2371TM National Semiconductor, LMX2371TM Datasheet - Page 3

• Manufacturer Part Number: LMX2371TM
• Description: IC FREQ SYNTH DUAL 20-TSSOP
• Manufacturer: National Semiconductor
• Series: PLLatinum™r
• Type: PLL Frequency Synthesizerr

Specifications of LMX2371TM

• Pll: Yes with Bypass
• Input: CMOS, TTL
• Output: CMOS
• Number Of Circuits: 1
• Ratio - Input:output: 3:1
• Differential - Input:output: Yes/No
• Frequency - Max: 2GHz, 1.2GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Frequency-max: 2GHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LMX2371TM

24-Pin
Pin Descriptions
CSP
10
11
12
14
15
16
17
18
19
20
22
8
Pin No.
TSSOP
20-Pin
10
11
12
13
14
15
16
17
18
19
8
9
OSC
Name
Fo/LD
Clock
CP
GND
GND
GND
Data
Vp2
Vµc
Pin
f
LE
IN
o
2
2
in
(Continued)
I/O
—
—
—
—
—
O
O
I
I
I
I
I
Oscillator input. The input has a V
threshold and can be driven from an external
CMOS or TTL logic gate.
Ground for Aux digital, MICROWIRE, FoLD, and
oscillator circuits.
Multiplexed output of the Main/Aux
programmable or reference dividers,
Main/Auxiliary lock detect signals and Fastlock
mode. CMOS output (see Programmable Modes
in the Datasheet).
High impedance CMOS Clock input. Data for the
various counters is clocked in on the rising edge,
into the 22-bit shift register.
Binary serial data input. Data entered MSB first.
The last two bits are the control bits. High
impedance CMOS input.
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).
Power supply for MICROWIRE circuitry. Must be
as µprocessor or baseband controller to enable
programming at low voltages.
Ground for Aux analog circuitry.
Auxiliary prescaler input. Small signal input from
the VCO.
Ground for Aux digital, MICROWIRE, FoLD, and
oscillator.
Aux internal charge pump output. For connection
to a loop filter for driving the input of an external
VCO.
Power supply for Aux charge pump. Must be
V
CC
V
CC
.
. Typically connected to same supply level
Description
3
CC
/2 input
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