sy89850u Micrel Semiconductor, sy89850u Datasheet - Page 9

• Manufacturer Part Number: sy89850u
• Description: Precision Low-power Lvpecl Line Driver/receiver With Internal Termination
• Manufacturer: Micrel Semiconductor

Output Interface Applications
LVPECL has a high input impedance, a very low
output impedance (open emitter), and a small signal
swing which results in low EMI. LVPECL is ideal for
driving
transmission lines. There are several techniques for
Related Product and Support Documentation
Part Number
SY58601U
HBW Solutions
August 2007
50Ω-
Note:
1.
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
Function
Ultra-Precision Differential 800mV LVPECL
Line Driver/Receiver with Internal Termination
MLF
New Products and Applications
and
For +2.5V systems, R1 = 250Ω, R2 = 62.5Ω.
b
®
resistor sets the DC bias voltage, equal to V
Application Note
100Ω-controlled
b
Figure 4a. Parallel Termination-Thevenin Equivalent
= 19Ω.
Figure 4b. Parallel Termination (3-Resistor)
impedance
T
.
9
Data Sheet Link
www.micrel.com/product-info/products/sy58601u.shtml
www.amkor.com/products/notes_papers/MLF_AppNote.pdf
www.micrel.com/product-info/products/solutions.shtml
terminating the LVPECL output: Parallel Termination-
Thevenin Equivalent, Parallel Termination (3-resistor),
and AC-coupled Termination. Unused output pairs
may be
must be terminated, or balanced.
left
floating. However,
[e-mail]
single-
or [phone]
M9999-083007-B
ended outputs