sy58032u Micrel Semiconductor, sy58032u Datasheet - Page 7

• Manufacturer Part Number: sy58032u
• Description: Sy58032u Ultra-precision 1 8 Fanout Buffer With Lvpecl Outputs And Internal Termination
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
impedance (open emitter), and small signal swing which
results in low EMI. LVPECL is ideal for driving 50ý and
100ý controlled impedance transmission lines. There are
several techniques for terminating the LVPECL
M9999-082707
[e-mail] or [phone]
Part Number
SY58031U
SY58032U
SY58033U
LVPECL OUTPUT
RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION
LVPECL has high input impedance, and very low output
Function
Ultra-Precision 1:8 Fanout Buffer with 400mV CML
Outputs and Internal I/O Termination
Ultra-Precision 1:8 Fanout Buffer with LVPECL
Outputs and Internal Termination
Ultra-Precision 1:8 Fanout Buffer with 400mV LVPECL
Outputs and Internal Termination
32-MLF
Application Note
HBW Solutions
®
Manufacturing Guidelines Exposed Pad
“source”
Figure 4. Parallel Termination-Thevenin Equivalent
Notes:
1. Power-saving alternative to Thevenin termination.
2. Place termination resistors as close to destination inputs as possible.
3. R
4. For 2.5V systems, R
+3.3V
+3.3V
b
For +2.5V systems,
R1 = 250Ω, R2 = 62.5Ω
resistor sets the DC bias voltage, equal to V
Figure 5. Parallel Termination (3-Resistor)
Z
Z
O
O
= 50Ω
Z = 50Ω
= 50Ω
Z = 50Ω
b
= 19Ω, For 3.3V systems, R
130Ω
82Ω
R1
R2
50Ω
7
output: Parallel Termination-Thevenin Equivalent, Parallel
Termination (3-resistor), and AC-coupled Termination.
Unused output pairs may be left floating. However, single-
ended outputs must be terminated, or balanced.
+3.3V
Data Sheet Link
http://www.micrel.com/product-info/products/sy58031u.shtml
http://www.micrel.com/product-info/products/sy58032u.shtml
http://www.micrel.com/product-info/products/sy58033u.shtml
www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf
http://www.micrel.com/product-info/as/solutions.shtml
R
T
50Ω
.
b
R1
130Ω
R2
82Ω
b
= 50Ω
C1 (optional)
0.01µF
V
“destination”
+3.3V
T
= V
+3.3V
V
CC
CC
—2V
Precision Edge
SY58032U
®