SY89544U_08 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – 2.5V, 3.2Gbps, DIFFERENTIAL 4:1

Micrel, Inc.
2.5V, 3.2Gbps, DIFFERENTIAL 4:1
LVDS MULTIPLEXER WITH
INTERNAL INPUT TERMINATION
Precision Edge^®
Precision E^Sd^Y8g⁹e^5®44U
SY89544U
FEATURES
■ Selects among four differential inputs
■ 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 x 5mm) MLF^® package
APPLICATIONS
■ SONET/SDH channel select applications
■ Fibre Channel multi-channel select applications
■ Gigabit Ethernet multi-channel select
TYPICAL PERFORMANCE
Output Amplitude
vs. Frequency
400
350
300
250
200
150
100
50
00 _{1 2 3 4 5 6}
FREQUENCY (GHz)
Precision Edge^®
DESCRIPTION
The SY89544U is a fast, low-jitter, 4:1 differential MUX
with an LVDS (350mV) compatible output with guaranteed
data rate throughput of 3.2Gbps over temperature and
voltage.
The SY89544U 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 SY89544U 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 SY89545L. For applications that require two
differential outputs, consider the SY89546U or SY89547L.
The SY89544U is part of Micrel’s Precision Edge^® product
family.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
FUNCTIONAL BLOCK DIAGRAM
IN0
50Ω
V_T0
50Ω
/IN0
IN1
50Ω
V_T1
50Ω
/IN1
IN2
50Ω
V_T2
50Ω
/IN2
IN3
50Ω
V_T3
50Ω
/IN3
4:1 MUX
0
1
MUX
2
S1
3 ^S0
LVDS
Q
/Q
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
M9999-082407
[e-mail] or [phone]
1
SEL0
SEL1
Rev.: C Amendment: /0
Issue Date: August 2007