MK2049-34SAILFTR IDT, Integrated Device Technology Inc, MK2049-34SAILFTR Datasheet

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MK2049-34SAILFTR

Manufacturer Part Number
MK2049-34SAILFTR
Description
IC VCXO PLL CLK SYNTH 20-SOIC
Manufacturer
IDT, Integrated Device Technology Inc
Type
PLL Clock Synthesizerr
Datasheet

Specifications of MK2049-34SAILFTR

Pll
Yes
Input
Clock
Output
Clock
Number Of Circuits
1
Ratio - Input:output
1:3
Differential - Input:output
No/No
Frequency - Max
77.76MHz
Divider/multiplier
Yes/Yes
Voltage - Supply
3.15 V ~ 3.45 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-SOIC
Frequency-max
44.736MHz
Number Of Elements
2
Supply Current
7mA
Pll Input Freq (min)
8KHz
Pll Input Freq (max)
36MHz
Operating Supply Voltage (typ)
3.3V
Operating Temp Range
-40C to 85C
Package Type
SOIC
Output Frequency Range
1.544 to 77.76MHz
Operating Supply Voltage (min)
3.15V
Operating Supply Voltage (max)
3.45V
Operating Temperature Classification
Industrial
Pin Count
20
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MK2049-34SAILFTR
Manufacturer:
IDT
Quantity:
20 000
3.3 VOLT COMMUNICATIONS CLOCK VCXO PLL
Description
The MK2049-34A is a VCXO Phased Locked Loop (PLL)
based clock synthesizer that accepts multiple input
frequencies. With an 8 kHz clock input as a reference, the
MK2049-34A generates T1, E1, T3, E3, ISDN, xDSL, and
other communications frequencies. This allows for the
generation of clocks frequency-locked and phase-locked to
an 8 kHz backplane clock, simplifying clock synchronization
in communications systems. The MK2409-34 can also
accept a T1 or E1 input clock and provide the same output
for loop timing. All outputs are frequency locked together
and to the input.
This part also has a jitter-attenuated Buffer capability. In this
mode, the MK2049-34A is ideal for filtering jitter from 27
MHz video clocks or other clocks with high jitter.
IDT can customize these devices for many other different
frequencies.
Block Diagram
IDT™ 3.3 VOLT COMMUNICATIONS CLOCK VCXO PLL
F
REQUENCY
I
(T
NPUT
YPICALLY
C
R
LOCK
EFERENCE
S
ELECT
8
K
H
Z
)
4
(M
VCXO-B
G
ASTER
ENERATOR
PLL
C
ASED
LOCK
)
E
(external loop filter)
XTERNAL
M
P
F
REQUENCY
ULTIPLYING
ULLABLE
1
Features
PLL
Packaged in 20-pin SOIC
Pb (lead) free package
3.3 V + 5% operation
Fixed I/O phase relationship on all selections
Meets the TR62411, ETS300 011, and GR-1244
specification for MTIE, Pull-in/Hold-in Range, Phase
Transients, and Jitter Generation for Stratum 3, 4, and 4E
Accepts multiple inputs: 8 kHz backplane clock, Loop
Timing frequencies, or 10 to 36 MHz
Locks to 8 kHz + 100 ppm (External mode)
Buffer Mode allows jitter attenuation of 10 to 36 MHz
input and x1/x0.5 or x2/x4 outputs
Exact internal ratios enable zero ppm error
Output clock rates include T1, E1, T3, E3, ISDN, xDSL,
and the OC3 submultiples
See the MK2049-01, -02, and -03 for more selections at
5 V
Industrial temperature range
C
RYSTAL
2
C
C
8
LOCK
LOCK
K
H
Z
(R
MK2049-34A
O
O
EGENERATED
UTPUT
UTPUT
MK2049-34A
DATASHEET
/ 2
REV E 051310
)

Related parts for MK2049-34SAILFTR

MK2049-34SAILFTR Summary of contents

Page 1

... Buffer Mode allows jitter attenuation MHz input and x1/x0.5 or x2/x4 outputs • Exact internal ratios enable zero ppm error • Output clock rates include T1, E1, T3, E3, ISDN, xDSL, and the OC3 submultiples • See the MK2049-01, -02, and -03 for more selections • Industrial temperature range XTERNAL ...

Page 2

... Connect the loop filter ceramic capacitors and resistor between this pin and — Connect a 10-200k resistor to ground. Contact IDT for recommended value for your application. Input Frequency select 0. Determines CLK input/outputs per table on page 3. 2 VCXO AND SYNTHESIZER Pin Description MK2049-34A REV E 051310 ...

Page 3

... The 8 kHz input clock does not need to have a 50% duty cycle; a “high” or “on” pulse as narrow acceptable. In the MK2049-34, the rising edges of CLK and CLK/2 are both aligned with the rising edge of the 8 kHz ICLK; refer to Figure 1 on page 4 for more details. ...

Page 4

... In fact, the input and output clocks probably are locked and the MK2049 will have zero delay to the average position of the 8 kHz input clock. In order to see this clearly, a low jitter 8 kHz input clock is necessary. Most lab frequency sources are NOT SUITABLE for this since they have high jitter at low frequencies ...

Page 5

... VOLT COMMUNICATIONS CLOCK VCXO PLL PC Board Layout A proper board layout is critical to the successful use of the MK2049-34A. In particular, the CAP1 and CAP2 pins are very sensitive to noise and leakage (CAP2 at pin 18 is the most sensitive). Traces must be as short as possible and the two capacitors and resistor must be mounted next to the device as shown below ...

Page 6

... Crystal Operation The MK2049-34A operates by phase locking the input signal to a VCXO which consists of the recommended pullable VCXO crystals and the integrated VCXO oscillator circuit on the MK2049-34A. To achieve the best performance and reliability, the layout guidelines shown on the previous page should be closely followed. ...

Page 7

... External Mode, Note 1 ICLK t pi ICLK to ICLK CLK to CLK/2 t 0 2 VDD/2, except 8 kHz Any clock selection 7 VCXO AND SYNTHESIZER Min. Typ. Max. Units 3.15 3.3 3. 0.8 V VDD-0.4 V 2 ± Min. Typ. Max. Units 8 kHz 150 ppm MK2049-34A REV E 051310 ...

Page 8

... Part / Order Number Marking MK2049-34SAILF MK2049-34SAILF MK2049-34SAILFTR MK2049-34SAILF "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied ...

Page 9

... MK2049-34A 3.3 VOLT COMMUNICATIONS CLOCK VCXO PLL Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 Corporate Headquarters Integrated Device Technology, Inc. www.idt.com © 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc ...

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