Microchip SY89545L Bedienungsanleitung
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SY89545L
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Precision Edge
®
SY89545L
Micrel, Inc.
M9999-060308
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 3.3V +10%
–40°C to +85°C temperature range
Available in 32-pin (5mm x 5mm) MLF
®
package
FEATURES
APPLICATIONS
SONET/SDH channel select applications
Fiber Channel multi-channel select applications
Gigabit Ethernet multi-channel select
1
Rev.: D Amendment: /0
Issue Date: June 2008
The SY89545L 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 SY89545L 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 SY89545L operates from a single 3.3V supply, and
is guaranteed over the full industrial temperature range
(–40°C to +85°C). For applications that require a 2.5V supply,
consider the SY89544U. For applications that require two
differential outputs, consider the SY89546U or
SY89545L.The SY89545L is part of a 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
3.3V, 3.2Gbps DIFFERENTIAL
4:1 LVDS MULTIPLEXER with
INTERNAL INPUT TERMINATION
Precision Edge
®
SY89545L
2
Precision Edge
®
SY89545L
Micrel, Inc.
M9999-060308
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.
1, 5, 8, VCC Positive Power Supply: Bypass with 0.1µF0.01µF low ESR capacitors. The 0.01µF
17, 20, 24, 28, 29 capacitor should be as close to 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
SY89545LMI MLF-32 Industrial SY89545L Sn-Pb
SY89545LMITR
(2)
MLF-32 Industrial SY89545L Sn-Pb
SY89545LMG
(3)
MLF-32 Industrial SY89545L with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY89545LMGTR
(2, 3)
MLF-32 Industrial SY89545L 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.
Produktspezifikationen
| Marke: | Microchip |
| Kategorie: | Nicht kategorisiert |
| Modell: | SY89545L |
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