SY89221UHY Micrel Inc, SY89221UHY Datasheet - Page 16

• Manufacturer Part Number: SY89221UHY
• Description: 2.5V/3.3V Integrated Divider + Fanout With 15 LVPECL Outputs Asn FSI Inputs (I Temp, )
• Manufacturer: Micrel Inc
• Series: Precision Edge®r
• Type: Fanout Buffer (Distribution), Divider, Multiplexerr

Specifications of SY89221UHY

• Number Of Circuits: 1
• Ratio - Input:output: 2:15
• Differential - Input:output: Yes/Yes
• Input: CML, LVDS, PECL
• Output: LVPECL
• Frequency - Max: 2GHz
• Voltage - Supply: 2.375 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Frequency-max: 2GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-1616

LVPECL Output Interface Applications
LVPECL has high input impedance, and very low
output impedance (open emitter), and small signal
swing which results in low EMI. LVPECL is ideal for
driving
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.
Related Product and Support Documentation
Part Number
SY89218U
SY89200U
SY89202U
HBW
Solutions
August 2007
Figure 5a. Parallel Termination-Thevenin
50Ω-
Function
Precision 1:15 LVDS Fanout Buffer with 2:1
MUX and Four ÷1/÷2/÷4 Clock Divider Output
Banks
Ultra-Precision 1:8 LVDS Fanout with Three
÷1/÷2/÷4 Clock Divider Output Banks
Ultra-Precision 1:8 LVPECL Fanout with Three
÷1/÷2/÷4 Clock Divider Output Banks
New Products and Applications
and
Equivalent
100Ω-controlled
impedance
16
Data Sheet Link
http://www.micrel.com/_PDF/HBW/sy89218u.pdf
http://www.micrel.com/_PDF/HBW/sy89200u.pdf
http://www.micrel.com/_PDF/HBW/sy89202u.pdf
http://www.micrel.com/page.do?page=/product-
info/as/HBWsolutions.shtml
Figure 5b. Parallel Termination
[e-mail]
(3-Resistor)
or [phone]
M9999-082407-C