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551SDCGI8

P1-P3P4-P6P7-P9P10-P12
DATASHEET
551S REVISION A 03/18/15 1 ©2015 Integrated Device Technology, Inc.
Low Skew 1 to 4 Clock Buffer 551S
Description
The 551S is a low cost, high-speed single input to four output
clock buffer. The 551S has best in class Additive Phase Jitter
of sub 50fsec.
IDT makes many non-PLL and PLL based low skew output
devices as well as Zero Delay Buffers to synchronize clocks.
Contact IDT for all of your clocking needs.
Features
• Low additive phase jitter RMS: 50fs
• Extremely low skew outputs (50ps)
• Low cost clock buffer
• Packaged in 8-pin SOIC and 8-pin DFN, Pb-free
• Input/Output clock frequency up to 200 MHz
• Non-inverting output clock
• Ideal for networking clocks
• Operating Voltages: 1.8V to 3.3V
• Output Enable mode tri-states outputs
• Advanced, low power CMOS process
• Extended temperature range (-40°C to +105°C)
Block Diagram
Q1
ICLK
Q2
Q3
Q4
Output Enable
LOW SKEW 1 TO 4 CLOCK BUFFER 2 REVISION A 03/18/15
551S DATASHEET
Pin Assignment
Pin Descriptions
External Components
A minimum number of external components are required for proper operation. A decoupling capacitor of 0.01F should be
connected between VDD on pin 7 and GND on pin 6, as close to the device as possible. A 33 series terminating resistor may
be used on each clock output if the trace is longer than 1 inch.
1
2
3
ICLK
4
Q1
Q2
VDD
Q3
GND
Q4
8
7
6
5
OE
8 Pin (150 mil) SOIC
1
2
3
ICLK
4
Q1
Q2
VDD
Q3
GND
Q4
8
7
6
5
OE
8-pin DFN
Pin
Number
Pin
Name
Pin
Type
Pin Description
1 ICLK Input Clock input. Internal pull-up resistor.
2 Q1 Output Clock output 1.
3 Q2 Output Clock output 2.
4 Q3 Output Clock output 3.
5 Q4 Output Clock output 4.
6 GND Power Connect to ground.
7 VDD Power Connect +1.8V, +2.5V or +3.3V.
8 OE Input Output Enable. Tri-states outputs when low. Internal pull-up resistor.
REVISION A 03/18/15 3 LOW SKEW 1 TO 4 CLOCK BUFFER
551S DATASHEET
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the 551S. These ratings, which are standard values
for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these or any other conditions
above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods can affect product reliability. Electrical parameters are guaranteed only over the recommended
operating temperature range.
Recommended Operation Conditions
Item Rating
Supply Voltage, VDD 3.465V
All Inputs and Outputs -0.5 V to
3.465V
Ambient Operating Temperature, Extended -40 to +105C
Storage Temperature -65 to +150C
Junction Temperature 125C
Soldering Temperature 260C
Parameter Min. Typ. Max. Units
Ambient Operating Temperature, extended -40 – +105 C
Power Supply Voltage (measured in respect to GND) +1.71 +3.465 V
P1-P3P4-P6P7-P9P10-P12

551SDCGI8

Mfr. #:
Buy 551SDCGI8
Manufacturer:
IDT
Description:
Clock Buffer Low Skew 1 to 4 50fs 50ps 200 MHz
Lifecycle:
New from this manufacturer.
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