sy58033u Micrel Semiconductor, sy58033u Datasheet - Page 7

• Manufacturer Part Number: sy58033u
• Description: Sy58033u Ultra-precision 1 8 Fanout Buffer With 400mv Lvpecl Outputs And Internal Termination
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
impedance (open emitter), and small signal swing which
results in low electromagnetic interference (EMI). LVPECL
is ideal for driving 50ý and 100ý controlled impedance
transmission lines. There are several techniques in
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
+3.3V
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
source
+3.3V
For +2.5V systems,
R1 = 250Ω, R2 = 62.5Ω
b
resistor sets the DC bias voltage, equal to V
Figure 5. Parallel Termination (3-Resistor)
Z
Z
O
O
= 50Ω
= 50Ω
Z = 50Ω
Z = 50Ω
b
= 19Ω, For 3.3V systems, R
R1
130Ω
R2
82Ω
50Ω
7
terminating the LVPECL output, which are the Parallel
Termination-Thevenin Equivalent, the Parallel Termination
(3-Resistor), and the 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
T
R
.
50Ω
b
b
R1
130Ω
R2
82Ω
= 50Ω
C1 (optional)
0.01µF
destination
+3.3V
V
T
V
+3.3V
= V
CC
CC
—2V
Precision Edge
SY58033U
®