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SY89544UMG

P1-P3P4-P6P7-P9P10-P10
1
Precision Edge
®
SY89544U
Micrel, Inc.
M9999-082407
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
■ 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
FEATURES
2.5V, 3.2Gbps, DIFFERENTIAL 4:1
LVDS MULTIPLEXER WITH
INTERNAL INPUT TERMINATION
Precision Edge
®
SY89544U
APPLICATIONS
■ SONET/SDH channel select applications
■ Fibre Channel multi-channel select applications
■ Gigabit Ethernet multi-channel select
Rev.: C Amendment: /0
Issue Date: August 2007
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.
TYPICAL PERFORMANCE
FUNCTIONAL BLOCK DIAGRAM
Precision Edge
®
IN0
/IN0
V
T0
50Ω
50Ω
IN1
/IN1
V
T1
50Ω
50Ω
Q
/Q
0
1
MUX
4:1 MUX
LVDS
IN2
/IN2
V
T2
50Ω
50Ω
2
IN3
/IN3
V
T3
50Ω
50Ω
3
S0
S1
SEL0
SEL1
Precision Edge is a registered trademark of Micrel, Inc.
Micro
LeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
0
50
100
150
200
250
300
350
400
0123456
OUTPUT AMPLITUDE (mV)
FREQUENCY (GHz)
Output Amplitude
vs. Frequency
2
Precision Edge
®
SY89544U
Micrel, Inc.
M9999-082407
hbwhelp@micrel.com or (408) 955-1690
Pin Number Pin Name Pin Function
4, 2, 32, IN0, /IN0, Differential Inputs: These input pairs are the differential signal inputs to the device. Inputs
30, 27, 25, 23, 21 IN1, /IN1, accept AC- or DC-coupled signals as small as 100mV. Each pin of a pair internally
IN2, /IN2, terminates to a V
T
pin through 50Ω. Note that these inputs will default to an indeterminate
IN3, /IN3 state if left open. Unused differential input pairs can be terminated by connecting one input
to V
CC
and the complementary input to GND through a 1kΩ resistor. The V
T
pin is to be
left open in this configuration. Please refer to the “Input Interface Applications” section for
more details.
3, 31, 26, 22 VT0, VT1, Input Termination Center-Tap: Each side of the differential input pair, terminates to a V
T
VT2, VT3 pin. The V
T0
, V
T1
, V
T2
, V
T3
pins provide a center-tap to a termination network for
maximum interface flexibility. See “Input Interface Applications” section for more details.
6, 19 SEL0, SEL1 These single-ended TTL/CMOS compatible inputs select the inputs to the multiplexers.
Note that these inputs are internally connected to a 25kΩ pull-up resistor and will default
to a logic HIGH state if left open. Input switching threshold is V
CC
/2.
1, 5, 8, VCC Positive Power Supply: Bypass with 0.1µF||0.01µF low ESR capacitors. The 0.01µF
17, 20, 24, 28, 29 capacitor should be as close to a V
CC
pin as possible.
10, 11 Q, /Q Differential Outputs: This LVDS output pair is the output of the device. It is a
logic function of the IN0, IN1, IN0, IN1 and SEL0 inputs. Please refer to the “Truth Table’”
for details.
7, 9, 12, 13, 16, 18 GND, Ground: Ground pin and exposed pad must be connected to the same ground plane.
Exposed pad
14, 15 NC No connect (unused pins).
PIN DESCRIPTION
PACKAGE/ORDERING INFORMATION
24
23
22
21
20
19
18
17
VCC
IN3
VT3
/IN3
VCC
SEL1
GND
VCC
VCC
/IN0
VT0
/IN0
VCC
SEL0
GND
VCC
1
2
3
4
5
6
7
8
910111213141516
32 31 30 29 28 27 26 25
VCC
VCC
/IN1
VT1
IN1
IN2
VT2
/IN2
GND
GND
/Q
Q
GND
NC
NC
GND
32-Pin MLF
®
Ordering Information
(1)
Package Operating Package Lead
Part Number Type Range Marking Finish
SY89544UMI MLF-32 Industrial SY89544U Sn-Pb
SY89544UMITR
(2)
MLF-32 Industrial SY89544U Sn-Pb
SY89544UMG
(3)
MLF-32 Industrial SY89544U with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY89544UMGTR
(2, 3)
MLF-32 Industrial SY89544U with Pb-Free
Pb-Free bar-line indicator NiPdAu
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25°C, DC electricals only.
2. Tape and Reel.
3. Recommended for new designs.
3
Precision Edge
®
SY89544U
Micrel, Inc.
M9999-082407
hbwhelp@micrel.com or (408) 955-1690
Absolute Maximum Ratings
(1)
Supply Voltage (V
CC
) ................................. –0.5V to +4.0V
Input Voltage (V
IN
) ........................................ –0.5V to V
CC
Termination Current
(3)
Source or sink current on V
T
..................................... ±100mA
Input Current
Source or sink current on IN, /IN ..........................±50mA
Lead Temperature (soldering, 20 sec.) ................... +260°C
Storage Temperature (TS) ...................... –65°C to +150°C
Operating Ratings
(2)
Supply Voltage (V
CC
) .......................... +2.375V to +2.625V
Ambient Temperature (T
A
) ........................ –40°C to +85°C
Package Thermal Resistance
(4)
MLF
®
(θ
JA
)
Still-Air ................................................................ 35°C/W
500lfpm .............................................................. 28°C/W
MLF
®
(Ψ
JB
)
Junction-to-Board ............................................... 20°C/W
T
A
= –40°C to +85°C; Unless otherwise stated.
Symbol Parameter Condition Min Typ Max Units
V
CC
Power Supply 2.375 2.5 2.625 V
I
CC
Power Supply Current No load, Max. V
CC
(6)
50 70 mA
R
DIFF_IN
Differential Input Resistance 80 100 120 Ω
(IN-to-/IN)
R
IN
Input Resistance 40 50 60 Ω
(IN-to-V
T
, /IN-to-V
T
)
V
IH
Input High Voltage 1.2 V
CC
V
(IN, /IN)
V
IL
Input Low Voltage 0 V
IH
–0.1 V
(IN, /IN)
V
IN
Input Voltage Swing Notes 7 0.1 V
CC
V
(IN, /IN)
V
DIFF_IN
Differential Input Voltage Swing Notes 7 0.2 V
|IN – /IN|
IN-to-V
T
Voltage from Input to V
T
1.8 V
Notes:
1. Permanent device damage may occur if the ratings in the “Absolute Maximum Ratings” section are exceeded. This is a stress rating only and
functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute
maximum ratings conditions for extended periods may affect device reliability.
2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. Due to the limited drive capability, use for input of the same package only.
4. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the device’s most negative potential on the PCB. Ψ
JB
uses 4-layer
θ
JA
in still-air unless otherwise stated.
5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
6. Includes current through internal 50Ω pull-ups.
7. See “Single-Ended and Differential Swings” section for V
IN
and V
DIFF_IN
definitions.
DC ELECTRICAL CHARACTERISTICS
(5)
P1-P3P4-P6P7-P9P10-P10

SY89544UMG

Mfr. #:
Buy SY89544UMG
Manufacturer:
Microchip Technology / Micrel
Description:
Encoders, Decoders, Multiplexers & Demultiplexers 2.5V, 3.2Gbps 4:1 LVDS Multiplexer
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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