SY89856UMG Micrel Inc, SY89856UMG Datasheet - Page 10

• Manufacturer Part Number: SY89856UMG
• Description: IC 2GHZ 1:6 LVPECL FANOUT 32-MLF
• Manufacturer: Micrel Inc
• Series: Precision Edge®r
• Type: Fanout Buffer (Distribution), Multiplexerr

Specifications of SY89856UMG

• Number Of Circuits: 1
• Ratio - Input:output: 2:6
• Differential - Input:output: Yes/Yes
• Input: CML, LVDS, PECL
• Output: LVPECL
• Frequency - Max: 3GHz
• Voltage - Supply: 2.375 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-MLF®, QFN
• Frequency-max: 3GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-2102-5; SY89856UMG

August 2007
LVPECL Output Interface Applications
LVPECL has a high input impedance and a very low
output impedance (open emitter), and a small signal
swing which results in low EMI. LVPECL is ideal for
driving
Related Documentation
Part Number
SY58035U
HBW Solutions
Notes:
1. For 2.5V systems, R1 = 250Ω, R2 = 62.5Ω.
Figure 4a. Parallel Termination-Thevenin Equivalent
+3.3V
50Ω
Z
Z
and
O
O
Function
4.5GHz, 1:6 LVPECL Fanout Buffer with
2:1 MUX Input and Internal Termination
New Products and Applications
= 50
= 50
100Ω-controlled
R1
130
R2
82
+3.3V
R2
82
R1
130
impedance
+3.3V
Data Sheet Link
www.micrel.com/product-info/products/sy58035u.html
www.micrel.com/product-info/products/solutions.shtml
10
transmission lines. There are several techniques for
terminating the LVPECL 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.
source
+3.3V
Notes:
2. Power-saving alternative to Thevenin termination.
3. Place termination resistors as close to destination inputs
4. R
5. For 2.5V systems, R
Figure 4b. Parallel Termination (3-Resistors)
as possible.
b
resistor sets the DC bias voltage, equal to V
Z
Z
[e-mail]
b
= 19Ω.
R b C1
or [phone]
M9999-082907-C
0.01µF
(optional)
destination
+3.3V
T
.
V
CC