SY58037UMI [MICREL]
ULTRA PRECISION 8:1 MUX WITH INTERNAL TERMINATION AND 1:2 CML FANOUT BUFFER; 超精密8 ： 2的CML扇出缓冲器：1的内部终端和1 MUX
| 型号： | SY58037UMI |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | ULTRA PRECISION 8:1 MUX WITH INTERNAL TERMINATION AND 1:2 CML FANOUT BUFFER |
| 文件： | 总11页 (文件大小：172K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
ULTRA PRECISION 8:1 MUX
WITH INTERNAL TERMINATION AND
1:2 CML FANOUT BUFFER
®
Precision Edge
SY58037U
FEATURES
■ Selects between 1 of 8 inputs, and provides two
®
precision, low skew CML output copies
Precision Edge
■ Guaranteed AC performance over temperature and
DESCRIPTION
voltage:
• DC to 5Gbps throughput
The SY58037U is a low jitter, low skew, high-speed 8:1
multiplexer with a 1:2 differential fanout buffer optimized for
precision telecom and enterprise server distribution
applications. The SY58037U distributes clock frequencies
from DC to 4GHz and data rates to 5Gpbs guaranteed over
temperature and voltage.
• <450ps propagation delay IN-to-Q (VIN ≥ 300mV)
• <70ps t / t time
r
f
• <15ps skew (output-to-output)
■ Unique, patent-pending, channel-to-channel
isolation design provides superior crosstalk
performance
The SY58037U differential input includes Micrel’s unique,
3-pin input termination architecture that directly interfaces
to any differential signal (AC- or DC-coupled) as small as
100mV (200mVpp) without any level shifting or termination
resistor networks in the signal path. The outputs are 50Ω
source-terminated CML with extremely fast rise/fall time
guaranteed to be less than 70ps.
■ Ultra-low jitter design:
• <1ps
random jitter
RMS
• <10ps deterministic jitter
PP
• <10ps total jitter (clock)
PP
• <0.7ps
crosstalk-induced jitter
RMS
■ Unique, patent-pending, input termination and VT
pin accepts DC- and AC-coupled inputs (CML, PECL,
LVDS)
The SY58037U features a patent-pending isolation design
that significantly improves channel-to-channel crosstalk
performance.
■ 400mV CML output swing
■ 50Ω source terminated outputs minimize round-trip
The SY58037U operates from a 2.5V ±5% or 3.3V ±10%
supply and is guaranteed over the full industrial temperature
range of –40°C to +85°C. The SY58037U is part of Micrel’s
reflections
■ Power supply 2.5V ±5% or 3.3V ±10%
■ –40°C to +85°C temperature range
®
high-speed, Precision Edge product line.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
®
■ Available in 44-pin (7mm × 7mm) MLF package
APPLICATIONS
■ Data communication systems
■ All SONET/SDH data/clock applications
■ All Fibre Channel applications
■ All Gigabit Ethernet applications
Precision Edge is a registered trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Rev.: C
Amendment: /0
M9999-020707
hbwhelp@micrel.com or (408) 955-1690
Issue Date: February 2007
1
Precision Edge®
SY58037U
Micrel, Inc.
FUNCTIONAL BLOCK DIAGRAM
IN0
50Ω
V
T0
50Ω
/IN0
REF-AC0
IN1
V
V
V
50Ω
50Ω
V
T1
/IN1
IN2
50Ω
50Ω
8:1 MUX
V
T2
0
1
2
3
4
/IN2
REF-AC1
IN3
1:2 Fanout
50Ω
50Ω
V
T3
Q0
/IN3
IN4
/Q0
MUX
50Ω
50Ω
5
6
Q1
V
T4
/Q1
/IN4
REF-AC2
IN5
7
S2
S1
50Ω
50Ω
S0
V
T5
/IN5
IN6
50Ω
50Ω
V
T6
/IN6
REF-AC3
IN7
V
50Ω
50Ω
V
T7
/IN7
SEL0 (CMOS/TTL)
SEL1 (CMOS/TTL)
SEL3 (CMOS/TTL)
TRUTH TABLE
SEL2
SEL1
SEL0
Q
/Q
L
L
L
L
L
H
L
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
/IN0
/IN1
/IN2
/IN3
/IN4
/IN5
/IN6
/IN7
L
H
H
L
L
H
L
H
H
H
H
L
H
L
H
H
H
M9999-020707
hbwhelp@micrel.com or (408) 955-1690
2
Precision Edge®
SY58037U
Micrel
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
Package Operating
Package
Marking
Lead
Finish
Part Number
Type
Range
44 43 42 41 40 39 38 37 36 35 34
SY58037UMI
MLF-44
MLF-44
MLF-44
Industrial
Industrial
Industrial
SY58037U
SY58037U
Sn-Pb
Sn-Pb
IN5
VREF-AC2
/IN4
1
2
33
GND
VCC
/Q1
32
31
SY58037UMITR(2)
SY58037UMG(3)
3
VT4
IN4
NC
4
Q1
30
29
28
27
SY58037U with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
5
VCC
GND
VCC
/Q0
Q0
VCC
GND
6
/IN3
VT3
IN3
VREF-AC1
/IN2
7
SY58037UMGTR(2, 3) MLF-44
Industrial
SY58037U with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
8
26
25
24
23
9
10
11
Notes:
12 13 14 15 16 17 18 19 20 21 22
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
®
44-Pin MLF (MLF-44)
PIN DESCRIPTION
Pin Number
Pin Name
Pin Function
20, 18,
16, 14,
13, 11,
9, 7,
IN0, /IN0,
IN1, /IN1,
IN2, /IN2,
IN3, /IN3,
IN4, /IN4,
IN5,/IN5,
IN6, /IN6,
IN7, /IN7
Differential Inputs: These input pairs are the differential signal inputs to the device. Inputs accept
AC or DC-coupled signals as small as 100mV. Each pin of a pair internally terminates to a VT
pin through 50Ω. Note that these inputs will default to an indeterminate state if left open.
Please refer to the “Input Interface Applications” section for more details.
5, 3,
1, 43,
42, 40,
38, 36
19,15,
12, 8,
4, 44,
41, 37
VT0, VT1
VT2, VT3,
VT4, VT5,
VT6, VT7
Input Termination Center-Tap: Each side of the differential input pair terminates to a VT pin.
The VT pins provide a center-tap to a termination network for maximum interface flexibility.
See “Input Interface Applications” section for more details.
17,
10,
2
VREF-AC0,
VREF-AC1,
VREF-AC2,
VREF-AC3
Reference Voltage: This output biases to VCC–1.2V. It is used when AC coupling the inputs
(IN, /IN). For AC-coupled applications, connect VREF_AC to the VT pin and bypass with a
0.01µF low ESR capacitor to VCC. See “Input Interface Applications” section for more details.
39
21,
22,
35
SEL0,
SEL1,
SEL2
The TTL/CMOS-compatible inputs select the inputs to the multiplexer. Note that this input is
internally connected to a 25kΩ pull-up resistor and will default to a logic HIGH state if left open.
24, 27, 29, 32
VCC
Positive Power Supply. Bypass with 0.1µF0.01µF low ESR capacitors as close to each VCC
pin.
25, 26,
30, 31
Q0,/Q0,
Q1,/Q1
Differential Outputs: These CML output pairs are the outputs of the device. Please refer to
the truth table below for details. Unused output pairs may be left open. Each output is designed
to drive 400mV into 100Ω across each output pair.
23, 28, 33
GND,
Exposed Pad
Ground. GND and exposed pad must both be connected to the most negative potential of chip
ground.
3
Precision Edge®
SY58037U
Micrel
Absolute Maximum Ratings(1)
Operating Ratings(2)
Power Supply Voltage (V ) ...................... –0.5V to +4.0V
Power Supply Voltage (V ) ............... +2.375V to +2.625V
CC
CC
Input Voltage (V ) ......................................... –0.5V to V
............................................................ +3.0V to +3.6V
IN
CC
LVPECL Output Current (I
)
Ambient Temperature Range (T ) ............. –40°C to +85°C
OUT
A
(4)
Continuous .............................................................50mA
Surge....................................................................100mA
Package Thermal Resistance
®
MLF (θ )
JA
(3)
Termination Current
Still-Air .............................................................24°C/W
®
Source or sink current on VT pin........................ ±100mA
MLF (ψ )
JB
Junction-to-board ............................................12°C/W
Lead Temperature (soldering, 20 sec.) ..................... 260°C
Storage Temperature Range (T ) ........... –65°C to +150°C
S
(5)
DC ELECTRICAL CHARACTERISTICS
TA= –40°C to +85°C, unless otherwise stated.
Symbol
Parameter
Condition
Min
2.375
3.0
Typ
2.5
3.3
145
50
Max
2.625
3.6
Units
V
VCC
Power Supply Voltage
VCC = 2.5V.
VCC = 3.3V.
V
ICC
Power Supply Current
No load, max. VCC
.
200
60
mA
Ω
RIN
Input Resistance (IN-to-VT)
40
80
RDIFF_IN
Differential Input Resistance
(IN-to-/IN)
100
120
Ω
VIH
Input HIGH Voltage
(IN-to-/IN)
VCC–1.2
VCC
VIH–0.1
1.7
V
V
V
V
VIL
Input LOW Voltage
(IN-to-/IN)
0
VIN
Input Voltage Swing
(IN-to-/IN)
See Figure 1a.
See Figure 1b.
0.1
0.2
VDIFF_IN
Differential Input Voltage Swing
(IN-to-/IN)
VT_IN
IN to VT (IN-to-/IN)
1.28
V
V
VREF-AC
Output Reference Voltage
VCC–1.3 VCC–1.2 VCC–1.1
Notes:
1. Permanent device damage may occur if ratings in the “Absolute Maximum Ratings” section are exceeded. This is a stress rating only and functional
operation is not implied for 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 uses 4-layer
JB
θ
in still-air number unless otherwise stated.
JA
5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
4
Precision Edge®
SY58037U
Micrel
(7)
CML OUTPUT DC ELECTRICAL CHARACTERISTICS
VCC = 2.5V ±5% or 3.3V ±10%; TA= –40°C to +85°C; RL = 100Ω across each output pair, unless otherwise stated.
Symbol
Parameter
Condition
Min
Typ
Max
Units
VOH
Output HIGH Voltage
Q, /Q
VCC–0.040 VCC–0.010
VCC
V
VOUT
Output Differential Swing
Q, /Q
See Figure 1a.
See Figure 1b.
325
650
40
400
800
50
mV
mV
Ω
VDIFF_OUT
ROUT
Differential Output Voltage Swing
Q, /Q
Output Source Impedance
60
(7)
LVTTL/CMOS DC ELECTRICAL CHARACTERISTICS
VCC = 2.5V ±5% or 3.3V ±10%; TA= –40°C to +85°C, unless otherwise stated.
Symbol
VIH
Parameter
Condition
Min
Typ
Max
VCC
0.8
Units
V
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
2.0
VIL
V
IIH
–125
–300
30
µA
µA
IIL
Note:
7. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
5
Precision Edge®
SY58037U
Micrel
(8)
AC ELECTRICAL CHARACTERISTICS
VCC = 2.5V ±5% or 3.3V ±10%; TA= –40°C to +85°C, RL = 100Ω across each output pair or equivalent, unless otherwise stated.
Symbol
Parameter
Condition
Min
Typ
Max
Units
fMAX
Maximum Operating Frequency
NRZ data
Clock
5
4
Gbps
GHz
tpd
Differential Propagation Delay
VIN ≥ 100mV
(IN-to-Q)
240
100
35550
215
450
550
ps
ps
(SEL-to-Q)
∆tpd Tempco Differential Propagation Delay
fs/°C
Temperature Coefficient
tSKEW
Output-to-Output Skew Note 9
Part-to-Part Skew Note 10
15
150
1
ps
ps
tJITTER
Data
Random Jitter (RJ) Note 11
psRMS
psPP
Deterministic Jitter (DJ) Note 12
10
Clock
Cycle-to-Cycle Jitter Note 13
Total Jitter (TJ) Note 14
1
10
psRMS
psPP
Crosstalk-induced Jitter Note 15
0.7
70
psRMS
ps
tr, tf
Output Rise/Fall Time
At full output swing, 20% to 80%.
20
40
Notes:
8. High-frequency AC-parameters are guaranteed by design and characterization.
9. Output-to-output skew is measured between two different outputs under identical input transitions.
10. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the
respective inputs
11. Random jitter is measured with a K28.7 character pattern, measured at ≤f
.
MAX
23
12. Deterministic jitter is measured at 2.5Gbps/3.2Gbps, with both K28.5 and 2 –1 PRBS pattern.
13. Cycle-to-cycle jitter definition: the variation of periods between adjacent cycles, T – T
where T is the time between rising
n
n–1
edges of the output signal.
12
14. Total jitter definition: with an ideal clock input of frequency ≤f
, no more than one output edge in 10 output edges will deviate by more than the
MAX
specified peak-to-peak jitter value.
15. Crosstalk is measured at the output while applying two similar differential clock frequencies that are asynchronous with respect to each other
adjacent inputs.
6
Precision Edge®
SY58037U
Micrel
TYPICAL OPERATING CHARACTERISTICS
V
= 3.3V, GND = 0, V = 100mV, T = 25°C, unless otherwise stated.
IN A
CC
Output Amplitude
vs. Frequency
Within Device Skew
vs. Temperature
Propagation Delay
vs. Temperature
900
800
700
600
500
400
300
1.2
1.0
0.8
0.6
0.4
0.2
0
365
360
355
350
345
340
335
330
0
1000 2000 3000 4000 5000
FREQUENCY (MHz)
-40 -20
0
20 40 60 80 100
-40 -20
0
20 40 60 80 100
TEMPERATURE (°C)
TEMPERATURE (°C)
7
Precision Edge®
SY58037U
Micrel
FUNCTIONAL CHARACTERISTICS
V
= 3.3V, GND = 0, V = 100mV, T = 25°C, unless otherwise stated.
CC
IN
A
1.25Gbps Output (Q – /Q)
2.5Gbps Output (Q – /Q)
TIME (200ps/div.)
TIME (100ps/div.)
5Gbps Output (Q – /Q)
200MHz Output (Q – /Q)
TIME (50ps/div.)
TIME (600ps/div.)
622MHz Output (Q – /Q)
TIME (100ps/div.)
8
Precision Edge®
SY58037U
Micrel
SINGLE-ENDED AND DIFFERENTIAL SWINGS
VDIFF_IN
,
VIN,
VOUT
VDIFF_OUT 800mV (Typ.)
400mV (Typ.)
Figure 1a. Single-Ended Voltage Swing
Figure 1b. Differential Voltage Swing
INPUT AND OUTPUT STAGES
VCC
VCC
VCC
50Ω
50Ω
50Ω
50Ω
ZO = 50Ω
ZO = 50Ω
/Q
/Q
100Ω
IN
VT
Q
Q
ZO = 50Ω
ZO = 50Ω
50Ω
50Ω
DC bias
per application
100mA
100mA
GND
GND
GND
/IN
Figure 2b. CML DC-Coupled
Figure 2c. CML AC-Coupled
Figure 2a. Simplified Differential
Input Stage
(100Ω Termination)
(50Ω Termination)
9
Precision Edge®
SY58037U
Micrel
INPUT INTERFACE APPLICATIONS
VCC
VCC
VCC
IN
IN
IN
LVPECL
LVPECL
/IN
CML
VCC
/IN
/IN
SY58037U
GND
SY58037U
Rpd
Rpd
VCC
SY58037U
0.01µF
VT
GND
GND
NC
VT
VT
NC
NC
VREF-AC
Rpd
VREF-AC
VREF-AC
GND
0.01µF
For VCC = 3.3V, Rpd = 50Ω.
For VCC = 2.5V, Rpd = 19Ω.
For 3.3V, Rpd = 100Ω.
For 2.5V, Rpd = 50Ω.
Option: May connect VT to VCC
.
Figure 3c. CML
Figure 3a. LVPECL
Figure 3b. LVPECL
Interface (DC-Coupled)
Interface (DC-Coupled)
Interface (AC-Coupled)
VCC
VCC
IN
CML
IN
/IN
LVDS
/IN
SY58037U
GND
VCC
SY58037U
VT
GND
VREF-AC
VT
NC
NC
0.01µF
VREF-AC
Figure 3d. CML
Figure 3e. LVDS Interface
Interface (AC-Coupled)
RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION
Part Number
Function
Data Sheet Link
SY58037U
Ultra Precision 8:1 MUX with Internal Termination
and 1:2 CML Fanout Buffer
http://www.micrel.com/product-info/products/sy58037u.shtml
http://www.micrel.com/product-info/products/sy58038u.shtml
http://www.micrel.com/product-info/products/sy58039u.shtml
SY58038U
SY58039U
Ultra Precision 8:1 MUX with Internal Termination
and 1:2 LVPECL Fanout Buffer
Ultra Precision 8:1 MUX with Internal Termination
and 1:2 400mV LVPECL Fanout Buffer
MLF® Application Note
www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf
www.micrel.com/product-info/products/solutions.shtml
HBW Solutions New Products and Applications
10
Precision Edge®
SY58037U
Micrel
®
44-PIN MicroLeadFrame (MLF-44)
Package
EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heat Dissipation
VEE
Heavy Copper Plane
Heavy Copper Plane
®
VEE
PCB Thermal Consideration for 44-Pin MLF Package
(Always solder, or equivalent, the exposed pad to the PCB)
Package Notes:
1. Package meets Level 2 qualification.
2. All parts are dry-packaged before shipment.
3. Exposed pads must be soldered to a ground for proper thermal management.
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2005 Micrel, Incorporated.
11
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