SM840001 Datasheet PDF - MICREL

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SM840001
MICREL

Part Number SM840001
Description 106.25MHz Ultra-Low Jitter Clock Synthesizer
Page 8 Pages


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SM840001
106.25MHz Ultra-Low Jitter Clock
Synthesizer
General Description
The SM840001 synthesizer series were designed for Fibre
Channel applications. The device design is optimized for
106.25MHz or 212.5MHz using a 26.5625MHz
fundamental parallel resonant crystal, with stability and
accuracy over the full operating range. The SM840001
includes a unique power reduction methodology, along
with a patented RotaryWaveTM architecture, that provides
a stable clock with very low noise for optimized
performance. This yields an overall improved Bit Error
Rate (BER) and improved waveform integrity.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
Generates a single LVCMOS/LVTTL output
Integrated loop filter components
RMS Phase Jitter:
- 510 fs (typ) at 106.25MHz
- 320 fs (typ) at 212.50MHz
Operates with either a 3.3V or 2.5V supply
Power consumption is <77mA @ 3.3 V
Fundamental crystal oscillator interface
Input frequency of 26.5625 MHz parallel resonant
Selectable output frequency: 106.25MHz or 212.5MHz
Temperature range: –40°C to +75°C
Available in 8-pin TSSOP package
Applications
Fibre Channel
Storage
___________________________________________________________________________________________________________
Block Diagram
www.DataSheet4U.com
RotaryWave is a trademark of Multigig, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 2010
M9999-031810-B
hbwhelp@micrel.com or (408) 955-1690



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Micrel, Inc.
Ordering Information(1)
Part Number
SM840001KA
SM840001KA TR(2)
Package
Type
K-8
K-8
Operating Range
-40°C to +75°C
-40°C to +75°C
Note:
1. Devices are Green, RoHS-compliant and PFOS-compliant.
2. Tape and Reel.
SM840001
Package Marking Lead Finish
840001
840001
NiPdAu
NiPdAu
Pin Configuration
8-Pin TSSOP (K-8)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
VDDA
OE
XTAL OUT
XTAL IN
FSEL
GND
Q0
VDD
Type
P
I
O
I
I
P
O
P
Frequency Select Table
FSEL
0
1
Output (MHz)
106.25 (Default)
212.5
Output Enable
www.DataSheetO4UE.com
0
1
Output
Disable
Enable
Level
Pull-up
Pull-down
Pin Function
Analog Power.
Output Enable: 1 = Enable, 0 = Disable.
Crystal Out.
Crystal Input.
Frequency Select Pin.
Ground.
Single Ended LVCMOS Clock Out.
Core Power.
March 2010
2 M9999-031810-B
hbwhelp@micrel.com or (408) 955-1690



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Micrel, Inc.
SM840001
Absolute Maximum Ratings(1)
Supply Voltage (VDD)...................................................+4.6V
Input Voltage (VIN) ................................ –0.50V to VDD+0.5V
Output Voltage (VOUT) .......................... –0.50V to VDD+0.5V
Lead Temperature (soldering, 20sec.)....................... 260°C
Storage Temperature (Ts) .........................–65°C to +150°C
Operating Ratings(2)
Supply Voltage (VIN)............................. +2.375V to +3.465V
Ambient Temperature (TA) .......................... –40°C to +75°C
Junction Thermal Resistance
TSSOP (θJA).....................................................150°C/W
DC Electrical Characteristics
VDD = 2.5V ±5%; TA = –40°C to +75°C, unless noted.
Symbol
Parameter
VDD
VDDA
IDD
IDDA
Core Supply Voltage
Analog Supply Voltage
Core Supply Current
Analog Supply Current
No load
Condition
DC Electrical Characteristics
VDD = 3.3V ±5%; TA = -40°C to +75°C, unless noted.
Symbol Parameter
Condition
VDD
VDDA
IDD
IDDA
Core Supply Voltage
Analog Supply Voltage
Core Supply Current
Analog Supply Current
No load
LVCMOS DC Characteristics
VDD = 2.5V and 3.3V ±5%; TA = -40°C to +75°C, unless noted.
Symbol
VIH
Parameter
Input HIGH Voltage
VIL Input LOW Voltage
VOH Output HIGH Voltage
VOL Output LOW Voltage
IIH Input HIGH Current
IIL Input LOW Current
IIH Input HIGH Current
wwIwIL .DataSheeItn4pUu.ct oLmOW Current
Condition
VDD = 3.3V ±5%
VDD = 2.5V ±5%
VDD = 3.3V ±5%
VDD = 2.5V ±5%
VDD = 3.3V ±5%
VDD = 2.5V ±5%
Output Enable input
Output Enable input
FSEL input
FSEL input
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
March 2010
3
Min
2.375
2.375
Typ
2.50
2.50
12
48
Max
2.625
2.625
20
55
Units
V
V
mA
mA
Min
3.135
3.135
Typ
3.30
3.30
15
49
Max
3.465
3.465
22
55
Units
V
V
mA
mA
Min
2
1.7
-0.30
-0.30
2.6
1.8
-150
-5
Typ Max Units
VDD +0.3
V
VDD + 0.3
0.80
V
V
0.70 V
V
V
0.5 V
5 µA
µA
150 µA
µA
M9999-031810-B
hbwhelp@micrel.com or (408) 955-1690



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Micrel, Inc.
SM840001
AC Electrical Characteristics
VDD = 2.5V and 3.3V ±5%; TA = -40°C to +75°C, unless noted.
Symbol Parameter
Condition
FOUT
Output Frequency
FSEL=1
FSEL=0
106.25MHz,
tJITTER
RMS Phase Jitter
Integration Range: 637kHz to 10MHz
212.50MHz
Integration Range: 2.55MHz to 20MHz
tR / tF
ODC
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
106.25MHz
212.50MHz
Min
186.66
93.33
Typ
212.5
106.25
510
Max
226.66
113.33
Units
MHz
MHz
fs
320 fs
100 350 ps
48 52 %
45 55 %
3.3V Carrier Frequency, 106.25MHz
Offset from Carrier
100Hz
1kHz
10kHz
100kHz
1MHz
10MHz
40MHz
Measured Phase Noise
-97
-122
-131
-126
-144
-163
-165
Unit
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
3.3V Carrier Frequency, 212.5MHz
Offset from Carrier
100Hz
1kHz
10kHz
100kHz
1MHz
10MHz
40MHz
Measured Phase Noise
-92
-116
-124
-120
-138
-161
-163
Unit
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
Crystal Characteristics
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitor
Drive Level
www.DataSheet4U.com
Condition
Min Typ Max Units
Fundamental Parallel Resonant
26.5625
MHz
50
7 pF
1 mW
March 2010
4 M9999-031810-B
hbwhelp@micrel.com or (408) 955-1690



SM840001 datasheet pdf
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SM840001 pdf
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