SY8809BLMGTR [MICREL]
ATM/SONET/SDH SUPPORT CIRCUIT, QCC16, LEAD FREE, MLF-16;
| 型号： | SY8809BLMGTR |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | ATM/SONET/SDH SUPPORT CIRCUIT, QCC16, LEAD FREE, MLF-16 ATM 异步传输模式 电信 电信集成电路 |
| 文件： | 总11页 (文件大小：376K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SY88309BL
3.3V, 2.7Gbps PECL Limiting Post Amplifier
with Wide Signal-Detect Range
General Description
Features
The SY88309BL low-power limiting post amplifiers are
designed for use in fiber-optic receivers. These devices
connect to typical transimpedance amplifiers (TIAs). The
linear signal output from TIAs can contain significant
amounts of noise and may vary in amplitude over time.
The SY88309BL quantizes these signals and output
PECL-level waveforms.
• Signal Detect circuit optimized to detect a larger and
wider input range (20mVPP-140mVPP)
• Chatter-free Open-Collector TTL Signal-Detect (SD)
• Single 3.3V power supply
• 155Mbps to 2.7Gbps operation
• Low-noise PECL data outputs
• Programmable SD level set (SDLVL
)
The SY88309BL operates from a single +3.3V power
supply, over temperatures ranging from –40oC to +85oC.
With their wide bandwidth and high gain, signals with
data rates up to 2.7Gbps, and as small as 5mVPP, can
be amplified to drive devices with CML or PECL inputs.
• Available in a tiny 10-pin EPAD-MSOP and 16-pin
MLF® package
Applications
It generates a Signal Detect (SD) open-collector TTL
output. The SD function is optimized to detect a larger
and wider input range, as shown in the characteristic
curve on page 6. A programmable signal-detect level set
pin (SDLVL) sets the sensitivity of the input amplitude
detection.
• PON
• Gigabit Ethernet
• 1X and 2X Fibre Channel
• SONET/SDH:OC-3/12/24/48 – STM 1/4/8/16
• High-gain line driver and line receiver
SD asserts high if the input amplitude rises above the
threshold sets by SDLVL and de-asserts low otherwise.
The SD output can be fed back to the EN input to
maintain stability. Typically, 3.5dB LOS/SD hysteresis is
provided to prevent chattering.
Markets
• FTTX
• Optical transceivers
• Datacom/Telecom
• Low-gain TIA interface
• Long-reach FOM
Datasheet and support documentation can be found on
Micrel’s web site at: www.micrel.com.
MLF and MicroLeadFrame are registered trademarks of Amkor Technolog
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY88309BL
Typical Application
Pin Configuration
16-Pin MLF® (MLF-16)
10-Pin EPAD-MSOP (K10-2)
Ordering Information
Package
Type
Operating
Range
Lead
Finish
Part Number
Package Marking
Matte-Sn
Pb-free
SY88309BLEY
K10-2
K10-2
Industrial
Industrial
Industrial
Industrial
309B with Pb-Free bar line indicator
309B with Pb-Free bar line indicator
309B with Pb-Free bar line indicator
309B with Pb-Free bar line indicator
Matte-Sn
Pb-free
SY88309BLEYTR(1)
SY88309BLMG
NiPdAu
Pb-free
MLF-16
MLF-16
NiPdAu
Pb-free
SY88309BLMGTR(1)
Note:
1. Tape and Reel.
2
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August 2007
Micrel, Inc.
SY88309BL
Pin Description
Pin Number
(MSOP)
Pin Number
Pin Name
Type
Pin Function
Enable: De-asserts true data output when LOW.
(MLF®)
TTL Input: Default is
high.
1
2
3
15
1
EN
DIN
/DIN
Data Input
True data input with 50Ω termination to VREF
Complementary data input with 50Ω termination to
VREF
Reference Voltage: Placing a capacitor here to VCC
helps stabilize SDLVL
.
4
Data Input
.
4
5
6
VREF
SDLVL
GND
.
Signal-detect Level Set: A resistor from this pin to
VCC sets the threshold for the data input amplitude
at which the SD output will be asserted.
14
Input
6
2, 3, 10, 11
Exposed Pad
Device ground. Exposed pad must be connected to
PCB ground plane.
Ground
Exposed Pad
Signal-detect: Asserts high when the data input
amplitude rises above the threshold sets by SDLVL
.
Open Collector
TTL Output
7
7
SD
For proper operation, install an external 4.75kΩ
pull-up resistor at this output.
8
9
9
12
/DOUT
DOUT
VCC
PECL Output
PECL Output
Power supply
Complementary data output.
True data output.
10
5, 8, 13, 16
Positive power supply.
3
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY88309BL
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VCC).................................... 0V to +4.0V
Input Voltage (DIN, /DIN) ................................... 0 to VCC
Supply Voltage (VCC)............................ +3.0V to +3.6V
Ambient Temperature (TA)..................–40°C to +85°C
Junction Temperature (TJ)................–40°C to +125°C
Junction Thermal Resistance(3)
Output Current (IOUT
)
Continuous.....................................................+50mA
Surge ...........................................................+100mA
/EN Voltage ........................................................ 0 to VCC
EPAD-MSOP
θ
ψ
JA (Still-Air)..............................................38oC/W
JB ............................................................22oC/W
MLF®
VREF Current .......................................-800µA to +500µA
Voltage ......................................................... VREF to VCC
Lead Temperature (soldering, 20sec.)..................260°C
Storage Temperature (Ts) .....................-65°C to +150°C
θ
ψ
JA (Still-Air)..............................................61oC/W
JB ............................................................38oC/W
DC Electrical Characteristics
VCC = 3.0V to 3.6V; RL = 50Ω to VCC-2V; TA = –40°C to +85°C; typical values at VCC = 3.3V, TA = 25oC.
Symbol
ICC
Parameter
Condition
Min
Typ
Max
60
Units
mA
V
Power Supply Current
SDLVL Voltage
No output load
38
VSDLVL
VOH
VREF
VCC
PECL Output HIGH Voltage
PECL Output LOW Voltage
Differential Output Offset
Reference Voltage
VCC-1.085 VCC-0.955 VCC-0.880
VCC-1.830 VCC-1.705 VCC-1.555
+120
V
VOL
V
VOFFSET
VREF
ZI
mV
V
VCC-1.48 VCC-1.32 VCC-1.16
Single-Ended Input Impedance
40
50
60
Ω
TTL DC Electrical Characteristics
VCC = 3.0V to 3.6V; TA = –40°C to +85°C.
Symbol
VIH
Parameter
Condition
Min
Typ
Max
Units
V
EN Input HIGH Voltage
EN Input LOW Voltage
EN Input HIGH Current
2.0
VIL
0.8
20
V
IIH
VIN = 2.7V
µA
µA
µA
µA
V
V
IN = VCC
100
IIL
EN Input LOW Current
SD Output Leakage
SD Output LOW Level
VIN = 0.5V
VOH = 3.6V
IOL = +4mA
-300
IOH
VOL
100
0.5
Notes:
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 rating 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. Thermal performance assumes the use of a 4-layer PCB. Exposed pad must be soldered (or equivalent) to the device’s most negative
potential on the PCB.
4
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY88309BL
AC Electrical Characteristics
VCC = 3.0V to 3.6V; RL = 50Ω to VCC-2V; TA = –40°C to +85°C; typical values at VCC = 3.3V, TA = +25°C.
Symbol
Parameter
Condition
Min
Typ
Max
Units
tr, tf
Output Rise/Fall Time
(20% to 80%)
ps
Note 4
150
tJITTER
Deterministic
Note 5
15
5
psPP
psRMS
mVPP
mVPP
µs
Random
Note 6
VID
Differential Input Voltage Swing
Differential Output Voltage Swing
SD Assert Time
Figure 1
5
1800
VOD
VID > 12mVPP, Figure 1
1500
2
TOFF
10
10
TON
SD De-assert Time
2
µs
SDAL
SDDL
HYSL
SDAM
SDDM
HYSM
SDAH
SDDH
HYSH
B-3dB
AV(Diff)
S21
Low SD Assert Level
Low SD De-assert Level
Low SD/LOS Hysteresis
Medium SD Assert Level
Medium SD De-assert Level
Medium SD/LOS Hysteresis
High SD Assert Level
High SD De-assert Level
High SD/LOS Hysteresis
3dB Bandwidth
RSDLVL = 15kΩ, Note 8
RSDLVL = 15kΩ, Note 8
RSDLVL = 15kΩ, Note 7
RSDLVL = 5kΩ, Note 8
RSDLVL = 5kΩ, Note 8
RSDLVL = 5kΩ, Note 7
RSDLVL = 100Ω, Note 8
RSDLVL = 100Ω, Note 8
RSDLVL = 100Ω, Note 7
27
mVPP
mVPP
dB
18
3.4
53
80
mVPP
mVPP
dB
21
2
36
3.5
137
94
3.5
1.8
42
6
200
mVPP
mVPP
dB
70
2
6
GHz
dB
Differential Voltage Gain
Single-ended Small-Signal Gain
30
36
dB
Notes:
4. Amplifier in limiting mode. Input is a 200MHz, 100mVpp square wave.
5. Deterministic jitter measured using 2.7Gbps K28.5 pattern, VID = 10mVPP
.
6. Random jitter measured using 2.7Gbps K28.7 pattern, VID = 10mVPP
.
7. This specification defines electrical hysteresis as 20log (LOS De-assert/LOS Assert). The ratio between optical hysteresis and electrical
hysteresis is found to vary between 1.5 and 2, depending upon the level of received optical power and ROSA characteristics. Based upon that
ratio, the optical hysteresis corresponding to the electrical hysteresis range 2dB-6dB, shown in the AC characteristics table, will be 1dB-3dB
Optical Hysteresis.
8. See “Typical Operating Characteristics” for a graph showing how to choose a particular RSDLVL for a particular SD assert and its associated de-
assert amplitude.
5
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY88309BL
Typical Operating Characteristics
SD Assert
SD De-assert
Functional Characteristics
6
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY88309BL
Functional Block Diagram
stage.
Detailed Description
Signal Detect
The SY88309BL low-power limiting post amplifiers
operate from a single +3.3V power supply, over
temperatures from –40oC to +85oC. Signals with data
rates up to 2.7Gbps and as small as 5mVPP can be
amplified. Figure 1 shows the allowed input voltage
swing. The SY88309BL generates an SD output
allowing feedback to EN for output stability. SDLVL sets
the sensitivity of the input amplitude detection.
The SY88309BL generates a chatter-free SD open-
collector TTL output, as shown in Figure 4. SD asserts
high if the input amplitude rises above the threshold sets
by SDLVL and de-asserts low otherwise. The SD output
can be fed back to the EN input to maintain stability
Signal-Detect Level Set
Programmable SD level set pin (SDLVL) sets the
threshold of the input amplitude detection. Connecting
an external resistor between VCC and SDLVL set the
Input Amplifier/Buffer
Figure 2 shows a simplified schematic of the input
stage. The high-sensitivity of the input amplifier allows
signals as small as 5mVPP to be amplified. The input
amplifier also allows input signals as large as
1800mVPP. Input signals below 12mVPP are linearly
amplified with a typical 42dB differential voltage gain.
Since it is a limiting amplifier, these devices output
typically 1500mVPP voltage-limited waveforms for input
signals greater than 12mVPP. Applications requiring the
SY88309BL to operate with strong signals should have
the upstream TIA placed as close as possible to the
devices’ input pins. This ensures the best performance
of the device.
voltage at SDLVL. This voltage ranges from VCC to VREF
.
The external resistor creates a voltage divider between
VCC and VREF, as shown in Figure 5.
Hysteresis
The SY88309BL typically provide 3.5dB SD electrical
hysteresis. By definition, a power ratio measured in dB
is 10log (power ratio). Power is calculated as V2IN/R for
an electrical signal. Hence, the same ratio can be stated
as 20log (voltage ratio). While in linear mode, the
electrical voltage input changes linearly with the optical
power and therefore, the ratios change linearly. Thus,
the optical hysteresis in dB is half the electrical
hysteresis in dB given in the data sheet. Since the
SY88309BL are electrical devices, this data sheet refers
to hysteresis in electrical terms. With 3.5dB SD
hysteresis, a voltage factor of 1.5 is required to assert or
de-assert SD.
Output Buffer
The SY88309BL PECL output buffers are designed to
drive 50Ω lines. The output buffer requires appropriate
termination for proper operation. An external 50Ω
resistor to VCC-2V for each output pin provides this.
Figure 3 shows a simplified schematic of the output
7
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY88309BL
Figure 1. VIS and VID
Figure 2. Input Structure
Figure 3. Output Structure
Figure 4. SD Output Structure
Figure 5. SDLVL Setting Circuit
8
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY88309BL
Package Information
10-Pin EPAD-MSOP (K10-2)
9
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY88309BL
16-Pin MLF® (MLF-16)
PCB Thermal Consideration for 16-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 pad must be soldered to a ground for proper thermal management,
solder void has to be less than 50% of the epad area.
10
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
Micrel, Inc.
SY88309BL
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 a Purchaser’s own risk
and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale.
© 2007 Micrel, Incorporated.
11
M9999-082307-A
hbwhelp@micrel.com or (408) 955-1690
August 2007
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