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PDF SY100EPT28L Data sheet ( Hoja de datos )
| Número de pieza | SY100EPT28L | |
| Descripción | 3V LVTTL-TO-DIFFERENTIAL LVPECL AND DIFFERENTIAL LVPECL-TO-LVTTL TRANSLATOR | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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Micrel, Inc.
3V LVTTL-TO-DIFFERENTIAL LVPECL
AND DIFFERENTIAL LVPECL-TO-LVTTL
TRANSLATOR
ECL Pro™
SY10EPT28L
ESCYL10P0rEoP™T28L
SY10EPT28L
SY100EPT28L
FEATURES
■ 3.3V ±10% power supply
■ Guaranteed AC parameters over temperature:
fMAX > 275MHz (LVTTL)
■ < 2ns LVPECL-to-LVTTL propagation delay
■ < 600ps LVTTL-to-LVPECL propagation delay
■ Internal 75kΩ input pull-down resistors
■ Industrial temperature range: –40°C to +85°C
■ Available in 8-pin MSOP and SOIC packages
ECL Pro™
DESCRIPTION
The SY10/100EPT28L is a differential LVPECL-to-
LVTTL translator and a LVTTL-to-differential LVPECL
translator in a single package. Because LVPECL (Positive
ECL) levels are used, only +3.3V and ground are required.
The small outline 8-pin package and the dual translation
design of the EPT28L makes it ideal for applications
which are sending and receiving signals across a
backplane.
The 100k series includes temperature compensation.
Thus, logic levels are constant over temperature.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
www.DataSheet4U.com
PIN NAMES
Pin
D_LVTTL
Q_LVTTL
D_LVPECL
/D_LVPECL
Q_LVPECL
/Q_LVPECL
VCC
GND
Function
Low Voltage TTL Input
Low Voltage TTL Output
Low Voltage Differential PECL Inputs
with 75kΩ internal pull-down
Low Voltage Differential PECL Outputs
3.3V Positive Supply
Ground
ECL Pro is a trademark of Micrel, Inc.
M9999-111605
[email protected] or (408) 955-1690
1
Rev.: C Amendment: /0
Issue Date: November 2005
1 page  
Micrel, Inc.
TERMINATION RECOMMENDATIONS
+3.3V
+3.3V
R1
ZO = 50Ω 130Ω
ZO = 50Ω
R2
82Ω
R1
130Ω +3.3V
R2
82Ω Vt = VCC —2V
Figure 1. LVPECL Parallel Termination–Thevenin Equivalent
+3.3V
Z = 50Ω
Z = 50Ω
+3.3V
source
50Ω 50Ω
destination
Rb
Figure 2. LVPECL Three-Resistor “Y–Termination”
Notes:
1. Power-saving alternative to 4-resistor, Thevenin termination.
2. Place termination resistors as close to destination inputs as possible.
3. Rb resistor sets the DC bias voltage, equal to Vt. For 3.3V supply, Rb value is between 46Ω to 50Ω.
ECL Pro™
SY10EPT28L
SY100EPT28L
M9999-111605
[email protected] or (408) 955-1690
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SY100EPT28L.PDF ] | |
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