SY55855VKI [MICREL]
DUAL CML/PECL/LVPECL-to-LVDS TRANSLATOR; 双CML / PECL / LVPECL至LVDS转换器
| 型号： | SY55855VKI |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | DUAL CML/PECL/LVPECL-to-LVDS TRANSLATOR |
| 文件： | 总7页 (文件大小：85K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SuperLite™
M
DUALCML/PECL/LVPECL-to-LVDS
TRANSLATOR
SY55855V
FINAL
FEATURES
■ Guaranteed f
>750MHz over temperature
MAX
SuperLite™
■ 1.5Gbps throughput capability
■ 3.0V to 5.7V power supply
DESCRIPTION
■ Guaranteed <700ps propagation delay over
temperature
The SY55855V is a fully differential, CML/PECL/
LVPECL-to-LVDS translator. It achieves LVDS signaling
up to 1.5Gbps, depending on the distance and the
characteristics of the media and noise coupling sources.
LVDS is intended to drive 50Ω impedance transmission
line media such as PCB traces, backplanes, or cables.
SY55855V inputs can be terminated with a single
resistor between the true and the complement pins of a
given input.
■ Guaranteed <50ps within-device skew over
temperature
■ LVDS compatible outputs
■ Fully differential I/O architecture
■ Wide operating temperature range: –40°C to +85°C
■ Available in a tiny 10-pin MSOP package
The SY55855V is a member of Micrel’s new
SuperLite™ family of high-speed logic devices. This family
features very small packaging, high signal integrity, and
operation at many different supply voltages.
PIN CONFIGURATION
D0
/D0
1
2
3
4
5
10 VCC
9
8
7
6
Q0
APPLICATIONS
D1
/Q0
Q1
/D1
■ High-speed logic
GND
/Q1
■ Data communications systems
■ Wireless communications systems
■ Telecom systems
10-Pin MSOP
PIN NAMES
FUNCTIONAL BLOCK DIAGRAM
Pin
D0, /D0
D1, /D1
Q0, /Q0
Q1, /Q1
GND
Function
CML/PECL/LVPECL Input Data
CML/PECL/LVPECL Input Data
LVDS Output Data
LVDS Output Data
Ground
D0
Q0
/D0
/Q0
D1
Q1
/D1
/Q1
VCC
VCC
SuperLite is a trademark of Micrel, Inc.
Rev.: C
Amendment:/0
1
Issue Date: March 2003
SuperLite™
SY55855V
Micrel
PIN DESCRIPTIONS
Q0, /Q0 – LVDS Output (Differential)
D0, /D0 – CML/PECL/LVPECL Input (Differential)
This is one LVDS output. It buffers the CML input that
appears at D0, /D0.
This is one of the inputs. It is converted to LVDS onto
the Q0 and /Q0 outputs.
D1, /D1 – CML/PECL/LVPECL Input (Differential)
Q1, /Q1 – LVDS Output (Differential)
This is the other input. It is converted to LVDS onto the
Q1 and /Q1 outputs.
This is the other LVDS output. It buffers the CML input
that appears at D1, /D1.
FUNCTIONAL DESCRIPTION
Establishing Static Logic Inputs
unconnected. For V ≤ 3.0V, connect the complement input
CC
The true pin of an input pair is internally biased to ground to V
and leave the true input unconnected. To make an
CC
through a 75kΩ resistor. The complement pin of an input input static logic one, connect the true input to V , leave
CC
pair is internally biased halfway between V
and ground the complement input unconnected. These are the only two
CC
by a voltage divider consisting of two 75kΩ resistors. In this safe ways to cause inputs to be at a static value. In particular,
way, unconnected inputs appear as logic zeros. To keep an no input pin should be directly connected to ground. All NC
input at static logic zero at V
> 3.0V, leave both inputs (no connect) pins should be unconnected.
CC
VCC
NC
X
NC
NC
X
/X
/X
VCC > 3.0V
(1)
Figure 1. Hard Wiring a Logic “1”
Note 1. X is either D0 or D1 input. /X is either /D0 or /D1 input.
NC
X
VCC
/X
TRUTH TABLE
D0
0
D1
0
Q0
0
/Q0
1
Q1
0
/Q1
1
VCC ≤ 3.0V
0
1
0
1
1
0
(1)
Figure 2. Hard Wiring a Logic “0”
1
0
1
0
0
1
Note 1. X is either D0 or D1 input. /X is either /D0 or /D1 input.
1
1
1
0
1
0
2
SuperLite™
SY55855V
Micrel
LVDS OUTPUTS
LVDS stands for Low Voltage Differential Swing. LVDS between an LVDS driver and receiver. Also, change in
specifies a small swing of 350mV typical, on a nominal common mode voltage, as a function of data input, is also
1.25V common mode above ground. The common mode kept tight, to keep EMI low.
voltage has tight limits to permit large variations in ground
50Ω
100Ω
±1%
vOD
50Ω
vOH, vOL
vOH, vOL
GND
Figure 3. LVDS Differential Measurement
49.9Ω, ±1%
vOCM
,
49.9Ω, ±1%
∆vOCM
GND
Figure 4. LVDS Common Mode Measurement
50Ω
100Ω
50Ω
Figure 5. LVDS Output Termination
3
SuperLite™
SY55855V
Micrel
(1)
ABSOLUTE MAXIMUM RATINGS
Symbol
Rating
Value
–0.5 to +6.0
–0.5 to VCC +0.5
±10%
Unit
V
VCC
VIN
Power Supply Voltage
Input Voltage
V
IOUT
TA
LVDS Output Current
mA
°C
°C
Operating Temperature Range
Storage Temperature Range
–40 to +85
–65 to +150
Tstore
Note 1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS 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
RATlNG conditions for extended periods may affect device reliability.
(1)
DC ELECTRICAL CHARACTERISTICS
(2)
V
= 3.0V to 5.7V; GND = 0V; T = –40°C to +85°C
CC
A
TA = –40°C
TA = +25°C
Typ.
TA = +85°C
Symbol
VCC
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
V
Power Supply Voltage
3.0
5.7
3.0
—
5.7
3.0
5.7
ICC
Power Supply Current
mA
3.6V <VCC <5.7V
CC ≤3.6V
—
—
80
50
—
—
—
30
80
50
—
—
80
50
V
Note 1. Specification for packaged product only.
Note 2. Equilibrium temperature.
(1)
CML DC ELECTRICAL CHARACTERISTICS
(2)
V
= 3.0V to 5.7V; GND = 0V; T = –40°C to +85°C
CC
A
Symbol
Parameter
Min.
100
1.6
Typ.
—
Max.
Unit
mV
V
Condition
VID
VIH
VIL
Differential Input Voltage
Input HIGH Voltage
Input LOW Voltage
—
—
VCC
1.5
—
VCC – 0.1
V
Note 1. Specification for packaged product only.
Note 2. Equilibrium temperature.
(1)
LVDS DC ELECTRICAL CHARACTERISTICS
(2)
V
= 3.0V to 5.7V; GND = 0V; T = –40°C to +85°C
CC
A
Symbol
Parameter
Min.
250
Typ.
—
Max.
450
Unit
mV
V
Condition
VOD
Differential Output Voltage(4)
100Ω Termination
VOCM
Output Common Mode
Voltage(3)
1.125
—
1.375
∆VOCM
Change in Common Mode
Voltage(3)
–50
—
+50
mV
VOH
VOL
Output HIGH Voltage(4), (5)
Output LOW Voltage(4), (5)
—
—
—
1.474
V
V
IOH = –4.0mA
0.925
—
IOL = 4.0mA
Note 1. Specification for packaged product only.
Note 2. Equilibrium temperature.
Note 3. Measured as per Figure 4.
Note 4. Measured as per Figure 3.
Note 5. Do not short output to GND.
4
SuperLite™
SY55855V
Micrel
(1)
AC ELECTRICAL CHARACTERISTICS
(2)
V
= 3.0V to 5.7V; GND = 0V; T = –40°C to +85°C
A
CC
Symbol
Parameter
Min.
750
300
Typ.
—
Max.
—
Unit
MHz
ps
Condition
fMAX
Maximum Operating Frequency
tPLH
tPHL
Propagation Delay
D0 to Q0, D1 to Q1
—
700
tSKEW
Within-Device Skew(3)
Part-to-Part Skew (Diff.)
—
—
—
—
50
250
ps
ps
tr
tf
LVDS Output Differential
Rise/Fall Times (20% to 80%)
100
—
300
Note 1. Specification for packaged product only.
Note 2. Equilibrium temperature.
Note 3. Worst case difference between Q0 and Q1 from either D0 or D1, when both outputs have the same transition.
PRODUCT ORDERING CODE
Ordering
Code
Package
Type
Operating
Range
Package
Marking
SY55855VKI
K10-1
Industrial
855V
5
SuperLite™
SY55855V
Micrel
(1)
EYE DIAGRAMS
1.25Gbps
1.5Gbps
622Mbps
3.3V LVPECL-to-LVDS
3.3V LVPECL-to-LVDS
3.3V LVPECL-to-LVDS
622Mbps
1.25Gbps
1.5Gbps
3.3V CML-to-LVDS
3.3V CML-to-LVDS
3.3V CML-to-LVDS
Note 1. 223–1 pattern.
6
SuperLite™
SY55855V
Micrel
10 LEAD MSOP (K10-1)
Rev. 00
MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com
The information furnished by Micrel in this datasheet 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.
© 2003 Micrel, Incorporated.
7
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