3.2 Gbps Precision, 1:2 LVDS Fanout Buffer with Internal Termination and
Fail Safe Input
Features
• Precision 1:2 LVDS Fanout Buffer
• Guaranteed AC Performance Over Temperature
and Voltage:
- DC-to > 3.2 Gbps Throughput
- <300 ps Propagation Delay (IN-to-Q)
- <20 ps Within-Device Skew
- <100 ps Rise/Fall Times
• Fail Safe Input
- Prevents Outputs From Oscillating When
Input Is Invalid
• Ultra-Low Jitter Design
- 130 fs
RMS
Typical Additive Phase Jitter
- High-Speed LVDS Outputs
• 2.5V ±5% Power Supply Operation
• Industrial Temperature Range: –40°C to +85°C
• Available In 16-pin (3 mm x 3 mm) QFN Package
General Description
The SY58608U is a 2.5V, high-speed, fully differential
1:2 LVDS fanout buffer optimized to provide two
identical output copies with less than 20 ps of skew and
130 fs
RMS
typical additive phase jitter. The SY58608U
can process clock signals as fast as 2 GHz or data
patterns up to 3.2 Gbps.
The differential input includes Microchip’s unique, 3-pin
input termination architecture that interfaces to
LVPECL, LVDS or CML differential signals, (AC- or
DC-coupled) as small as 100 mV (200 mV
PP
) without
any level-shifting or termination resistor networks in the
signal path. For AC-coupled input interface
applications, an integrated voltage reference (V
REF-AC
)
is provided to bias the V
T
pin. The outputs are 325 mV
LVDS, with rise/fall times guaranteed to be less than
100 ps.
The SY58608U operates from a 2.5V ±5% supply and
is guaranteed over the full industrial temperature range
(–40°C to +85°C). The SY58608U is part of Microchip’s
high-speed, Precision Edge
®
product line.
Applications
•
•
•
•
All SONET Clock And Data Distribution
Fibre Channel Clock And Data Distribution
Gigabit Ethernet Clock And Data Distribution
Backplane Distribution
Package Type
SY58608U
3x3 QFN-16
Top View
Markets
•
•
•
•
•
DataCom
Telecom
Storage
ATE
Test and Measurement
GND
GND
14
VCC
16
15
13
12
11
10
9
VCC
IN
VT
VREF-AC
/IN
1
2
3
4
5
6
7
8
Q0
/Q0
Q1
/Q1
GND
VCC
United States Patent No. RE44,134
2018 Microchip Technology Inc.
GND
DS20005605A-page 1
VCC
SY58608U
Functional Block Diagram
Q0
IN
50
V
T
50
/IN
V
REF-AC
Q1
/Q1
/Q0
DS20005605A-page 2
2018 Microchip Technology Inc.
SY58608U
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage, V
CC
.................................................................................................................................. –0.5V to +4.0V
Input Voltage, V
IN
...............................................................................................................................–0.5V to V
CC
+0.3V
LVDS Output Current, I
OUT
................................................................................................................................... ±10 mA
Input Current
Source or Sink Current on, IN, /IN ............................................................................................................. ±50 mA
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