|
|
PDF SY54020R Data sheet ( Hoja de datos )
| Número de pieza | SY54020R | |
| Descripción | Low Voltage 1.2V/1.8V/2.5V CML 1:4 Fanout Buffer | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de SY54020R (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
|
No Preview Available !
www.DataSheet.co.kr
SY54020R
Low Voltage 1.2V/1.8V/2.5V CML 1:4 Fanout
Buffer with /EN and Fail-Safe Input
3.2Gbps, 2.5GHz
General Description
The SY54020R is a fully differential, low voltage
1.2V/1.8V/2.5V CML 1:4 Fanout Buffer with active-low
Enable (/EN) and Fail-Safe Input (FSI). The Enable is
synchronous so that the outputs will only be
enabled/disabled when they are already in the LOW
state. This avoids any chance of generating a runt clock
pulse when the device is enabled/disabled as can
happen with an asynchronous control. When this device
is used as a clock fanout, disabling the downstream
clock may reduce system power. FSI is a special circuit
designed to sense the amplitude of the input signal and
to latch the output when an invalid or no signal is
present at the input. The SY54020R can process clock
signals up to 2.5 GHz or data patterns up to 3.2Gbps.
The differential input includes Micrel’s unique, 3-pin
input termination architecture that interfaces to LVPECL,
LVDS or CML differential signals as small as 100mV
(200mVpp) without any level-shifting or termination
resistor networks in the signal path. For AC-coupled
input interface applications, an internal voltage
reference is provided to bias the VT pin. The outputs are
CML, with extremely fast rise/fall times guaranteed to be
less than 100ps.
The SY54020R operates from a 2.5V ±5% core supply
and a 1.2V, 1.8V or 2.5V ±5% output supply and is
guaranteed over the full industrial temperature range
(–40°C to +85°C).
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Functional Block Diagram
Features
Precision Edge®
• 1.2V/1.8V/2.5V CML 1:4 Fanout Buffer with FSI
• Active-low Enable (/EN) input to disable the outputs
• Guaranteed AC performance over temperature and
voltage:
– DC-to > 3.2Gbps Data throughput
– DC-to > 2.5GHz Clock throughput
– <400 ps propagation delay (IN-to-Q)
– <20ps within-device skew
– <100 ps rise/fall times
• Ultra-low jitter design
– <1psRMS cycle-to-cycle jitter
• High-speed CML outputs
• 2.5V ±5% VCC , 1.2/1.8V/2.5V ±5% VCCO power supply
operation
• Industrial temperature range: –40°C to +85°C
• Available in 16-pin (3mm x 3mm) MLF® package
Applications
• SONET clock and data distribution
• Fibre Channel clock and data distribution
• Gigabit Ethernet clock and data distribution
Markets
• Storage
• ATE
• Test and measurement
• Enterprise networking equipment
• High-end servers
• Access
• Metro area network equipment
Precision Edge is a registered trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 2009
M9999-041409-A
[email protected] or (408) 955-1690
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Micrel, Inc.
SY54020R
CML Outputs DC Electrical Characteristics (5)
VCCO = 1.14V to 1.26V, RL = 50Ω to VCCO,
VCCO = 1.7V to 1.9V; 2.375V to 2.625V, RL = 50Ω to VCCO or 100Ω across the outputs,
VCC = 2.375V to 2.625V. TA = –40°C to +85°C, unless otherwise stated.
Symbol Parameter
Condition
Min
VOH Output HIGH Voltage
RL = 50Ω to VCCO
VCCO-0.020
VOUT
Output Voltage Swing
See Figure 3a
300
VDIFF_OUT Differential Output Voltage Swing See Figure 3b
600
ROUT
Output Source Impedance
45
Typ
VCCO-0.010
390
780
50
Max
VCCO
475
950
55
Units
V
mV
mV
Ω
LVTTL/CMOS DC Electrical Characteristics (5)
VCC = 2.5V ±5%, TA = –40°C to +85°C, unless otherwise stated.
Symbol Parameter
Condition
Min Typ Max
VIH Input HIGH Voltage
2.0 VCC
VIL Input LOW Voltage
0.8
IIH Input HIGH Current
VIH = VCC
200
IIL Input LOW Current
VIL = 0V
-5 75
Note:
5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
Units
V
V
µA
µA
April 2009
5 M9999-041409-A
[email protected] or (408) 955-1690
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
Micrel, Inc.
Input and Output Stage
SY54020R
Figure 2a. Simplified Differential Input Buffer
Single-Ended and Differential Swings
Figure 2b. Simplified CML Output Buffer
Figure 3a. Single-Ended Swing
Figure 3b. Differential Swing
April 2009
11
M9999-041409-A
[email protected] or (408) 955-1690
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet SY54020R.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| SY54020AR | Low Voltage 1.2V/1.8V/2.5V CML 1:4 Fanout Buffer | Micrel Semiconductor |
| SY54020R | Low Voltage 1.2V/1.8V/2.5V CML 1:4 Fanout Buffer | Micrel Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |