LMX2335LM National Semiconductor, LMX2335LM Datasheet

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LMX2335LM

Manufacturer Part Number
LMX2335LM
Description
IC FREQ SYNTHESIZER DUAL 16-SOIC
Manufacturer
National Semiconductor
Series
PLLatinum™r
Type
PLL Frequency Synthesizerr
Datasheet

Specifications of LMX2335LM

Pll
Yes with Bypass
Input
CMOS, TTL
Output
CMOS
Number Of Circuits
1
Ratio - Input:output
3:1
Differential - Input:output
No/No
Frequency - Max
1.1GHz
Divider/multiplier
Yes/No
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Frequency-max
1.1GHz
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*LMX2335LM

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LMX2335LM
Manufacturer:
NS/国半
Quantity:
20 000
© 2004 National Semiconductor Corporation
LMX2335L/LMX2336L
LMX2335L
LMX2336L
PLLatinum
RF Personal Communications
General Description
The LMX2335L and LMX2336L are monolithic, integrated
dual frequency synthesizers, including two high frequency
prescalers, and are designed for applications requiring two
RF phase-lock loops. They are fabricated using National’s
0.5µ ABiC V silicon BiCMOS process.
The LMX2335L/36L contains two dual modulus prescalers. A
64/65 or a 128/129 prescaler can be selected for each RF
synthesizer. A second reference divider chain is included in
the IC for improved system noise. The LMX2335L/36L com-
bined with a high quality reference oscillator, two loop filters,
and two external voltage controlled oscillators generates
very stable low noise RF local oscillator signals.
Serial data is transferred into the LMX2335L/36L via a three
wire interface (Data, Enable, Clock). Supply voltage can
range from 2.7V to 5.5V. The LMX2335L/36L feature very
low current consumption; LMX2335L 4.0 mA at 5V,
LMX2336L 5.5 mA at 5V. The LMX2335L is available in SO,
TSSOP and CSP 16-pin surface mount plastic packages.
The LMX2336L is available in a TSSOP 20-pin and CSP
24-pin surface mount plastic package.
Functional Block Diagram
TRI-STATE
Fastlock
, MICROWIRE
®
is a registered trademark of National Semiconductor Corporation.
and PLLatinum
Low Power Dual Frequency Synthesizer for
are trademarks of National Semiconductor Corporation.
1.1 GHz/1.1 GHz
2.0 GHz/1.1 GHz
DS012807
Features
n Ultra low current consumption
n 2.7V to 5.5V operation
n Selectable synchronous and asynchronous powerdown
n Dual modulus prescaler: 64/65 or 128/129
n Selectable charge pump TRI-STATE
n Selectable charge pump current levels
n Selectable Fastlock
n Upgrade and compatible to LMX2335/36
n Small-outline, plastic, surface mount TSSOP package
n LMX2336 available in CSP package
Applications
n Cellular telephone systems (AMPS, ETACS, RCR-27)
n Cordless telephone systems
n Personal Communication Systems
n Dual Mode PCS phones
n Cable TV Tuners (CATV)
n Other wireless communication systems
mode:
I
(DECT, ISM , PHS, CT-1+)
(DCS-1800, PCN-1900)
CC
= 1 µA (typ)
mode
PRELIMINARY
®
01280701
mode
February 2001
www.national.com

Related parts for LMX2335LM

LMX2335LM Summary of contents

Page 1

... LMX2336L 5 5V. The LMX2335L is available in SO, TSSOP and CSP 16-pin surface mount plastic packages. The LMX2336L is available in a TSSOP 20-pin and CSP 24-pin surface mount plastic package. Functional Block Diagram TRI-STATE ® registered trademark of National Semiconductor Corporation. Fastlock ™ , MICROWIRE ™ and PLLatinum ™ ...

Page 2

... Connection Diagrams LMX2335L (Top View) Order Number LMX2335LM or LM2335LTM NS Package Number M16A and MTC16 LMX2336L (Top View) Order Number LMX2336LTM NS Package Number MTC20 Pin Descriptions Pin No. Pin No. Pin No. Pin No. 2336LTM 2336LSLB 2335LTM 2335LSLB www.national.com 01280702 01280703 Pin I/O Name Power supply voltage input for RF1 analog and RF1 digital CC circuits ...

Page 3

Pin Descriptions (Continued) Pin No. Pin No. Pin No. Pin No. 2336LTM 2336LSLB 2335LTM 2335LSLB ...

Page 4

Block Diagram Note supplies power to the RF1 prescaler, N-counter, R-counter, and phase detector detector, R-counter along with the OSC buffer, MICROWIRE, and F in voltage level. Note and V 2 can ...

Page 5

... Absolute Maximum Ratings 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Power Supply Voltage Voltage on Any Pin with GND = Storage Temperature Range ( Lead Temperature (solder 4 sec Electrical Characteristics V = 5.0V 5.0V 25˚C, except as specified ...

Page 6

Electrical Characteristics V = 5.0V 5.0V 25˚C, except as specified Symbol Parameter I vs Charge Pump Sink Do-SINK I vs Soure Mismatch Do-SOURCE Charge Pump Do Do Current Vs Voltage ...

Page 7

Charge Pump Current Specification Definitions − ∆ sink current sink current ∆ sink current ...

Page 8

Typical Performance Characteristics LMX2335L Charge Pump Current HIGH cp www.national.com 01280720 Voltage Charge Pump Current 01280722 LMX2336L 01280721 Voltage ...

Page 9

Typical Performance Characteristics LMX2335L Input Impedance (for SO package 2.7V to 5.5V MHz to 1.5 GHz CC IN Marker GHz, Real = 94, Imaginary = −118 Marker 2 = 1.2 GHz, Real ...

Page 10

Typical Performance Characteristics LMX2335L RF/IF PLL, LMX2336 IF PLL (for CSP 2.7V to 5.5V MHz to 1.5 GHz CC IN Marker 1 = 100 MHz, 446 −j279 ohm Marker 2 = 500 MHz, 178 −j210 ...

Page 11

Typical Performance Characteristics LMX2335L RF2 Sensitivity vs Frequency LMX2336L RF2 Sensitivity vs Frequency (Continued) LMX2336L RF1 Sensitivity vs Frequency 01280728 Oscillator Input Sensitivity vs Frequency 01280730 11 01280729 01280737 www.national.com ...

Page 12

Functional Description The simplified block diagram below shows the 22-bit data register, two 15-bit R Counters and two 18-bit N Counters (intermediate latches are not shown). The data stream is clocked (on the rising edge of Clock) into the DATA ...

Page 13

Functional Description PROGRAMMABLE DIVIDER (N COUNTER) Each N counter consists of the 7-bit swallow counter (A counter) and the 11-bit programmable counter (B counter). If the Control Bits are (10 for RF2 counter and 11 for RF1 ...

Page 14

Functional Description Phase Detector Polarity (Note 10) 0 Negative 1 Positive Note 8: Refer to POWERDOWN OPERATION in Functional Description. Note 9: The I LOW current state = 1 CPo Note 10: ...

Page 15

Functional Description RF1 R[19] RF2 R[19] (RF1 LD) (RF2 LD — don’t care condition Note ...

Page 16

Functional Description SERIAL DATA INPUT TIMING Parenthesis data indicates programmable reference divider data. Data shifted into register on clock rising edge. Data is shifted in MSB first Data to Clock Set Up Time Data to ...

Page 17

Typical Application Example Operational Notes: * VCO is assumed AC coupled increases impedance so that VCO output power is provided to the load rather than the PLL. Typical values are 10Ω 200Ω depending on the VCO ...

Page 18

Application Information A block diagram of the basic phase locked loop is shown in Figure 1. Loop Gain Equations A linear control system model of the phase feedback for a PLL in the locked state is shown in Figure 2. ...

Page 19

Application Information If we were now to redefine the cut off frequency, wp’, as double the frequency which gave us our original loop band- width, wp, the loop response time would be approximately halved. Because the filter attenuation at the ...

Page 20

www.national.com 20 ...

Page 21

Physical Dimensions inches (millimeters) unless otherwise noted 24-Pin Chip Scale Package Order Number LMX2336LSLB *For Tape and Reel (2500 Units Per Reel) Order Number LMX2336LSLBX NS Package Number SLB24A 21 www.national.com ...

Page 22

... Order Number LMX2335LM *For Tape and Reel (2500 Units Per Reel) Order Number LMX2335LMX NS Package Number M16A 16-Lead Thin Shrink Small Outline Package (TM) Order Number LMX2335LTM *For Tape and Reel (2500 Units Per Reel) ...

Page 23

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead (0.173" Wide) Thin Shrink Small Outline Package (TM) Order Number LMX2336LTM *For Tape and Reel (2500 Units Per Reel) Order Number LMX2336LTMX NS Package Number MTC20 23 www.national.com ...

Page 24

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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