SY89542U Datasheet, PDF (1/9 Pages) Micrel Semiconductor – 2.5Vm 3.2Gbps DUAL, DIFFERENTIAL 2:1 LVDS MULTIPLEXER WITH INTERNAL TERMINATION

Micrel, Inc.
2.5V, 3.2Gbps DUAL, DIFFERENTIAL
2:1 LVDS MULTIPLEXER WITH
INTERNAL TERMINATION
Precision Edge^®
Precision E^Sd^Yg⁸⁹e⁵®^42U
SY89542U
FEATURES
Dual 2:1 multiplexer
Guaranteed AC performance over temp and voltage:
• DC-to > 3.2Gbps data rate throughput
• < 600ps In-to-Out t_pd
• < 150ps t_r/t_f
Ultra-low jitter design:
• < 1ps_RMS random jitter
• < 10ps_PP deterministic jitter
• < 10ps_PP total jitter (clock)
• < 0.7ps_RMS crosstalk-induced jitter
Unique input isolation design minimizes crosstalk
Internal input termination
Unique input termination and V_T pin accepts
DC-Coupled and AC-coupled inputs (LVDS, LVPECL,
CML)
350mV LVDS output swing
CMOS/TTL compatible MUX select
Power supply 2.5V ±5%
–40°C to +85°C temperature range
Available in 32-pin (5mm × 5mm) MLF™ package
APPLICATIONS
DESCRIPTION
Precision Edge^®
The SY89542U includes two precision, high-speed 2:1
differential Muxes with LVDS (350mV) compatible outputs
with a guaranteed data rate throughput of 3.2Gbps over
temperature and voltage.
The SY89542U differential inputs include a unique, 3-pin
internal termination that allows access to the termination
network through a V_T pin. This feature allows the device to
easily interface to different logic standards, both AC- and
DC-coupled without external resistor-bias and termination
networks. The result is a clean, stub-free, low jitter interface
solution.
The SY89542U operates from a single 2.5V supply, and
is guaranteed over the full industrial temperature range
(–40°C to +85°C). For applications that require a 3.3V supply,
consider the SY89543L. The SY89542U is part of Micrel’s
Precision Edge^® product family.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
Redundant clock/data switchover
SONET/SDH multi-channel select applications
Fibre Channel applications
GigE applications
FUNCTIONAL BLOCK DIAGRAM
INA0
50Ω
V_TA0
50Ω
/INA0
2:1 MUX
0
MUX A
INA1
50Ω
V_TA1
50Ω
/INA1
1S
SELA (CMOS/TTL)
INB0
50Ω
V_TB0
50Ω
/INB0
LVDS
QA
/QA
INB1
50Ω
V_TB1
50Ω
/INB1
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
M9999-071505
[e-mail] or [phone]
1
2:1 MUX
0
MUX B
1S
SELB (CMOS/TTL)
LVDS
QB
/QB
Rev.: B Amendment: /0
Issue Date: July 2005