DS15MB200 [TI]

具有预加重功能的双路 1.5Gbps 2:1/1:2 LVDS 多路复用器/缓冲器;
DS15MB200
型号: DS15MB200
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

具有预加重功能的双路 1.5Gbps 2:1/1:2 LVDS 多路复用器/缓冲器

复用器
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DS15MB200  
www.ti.com  
SNLS196E NOVEMBER 2005REVISED MARCH 2013  
DS15MB200 Dual 1.5 Gbps 2:1/1:2 LVDS Mux/Buffer with Pre-Emphasis  
Check for Samples: DS15MB200  
1
FEATURES  
DESCRIPTION  
The DS15MB200 is a dual-port 2 to 1 multiplexer and  
1 to 2 repeater/buffer. High-speed data paths and  
flow-through pinout minimize internal device jitter and  
simplify board layout, while pre-emphasis overcomes  
ISI jitter effects from lossy backplanes and cables.  
The differential inputs and outputs interface to LVDS  
or Bus LVDS signals such as those on Texas  
Instrument's 10-, 16-, and 18-bit Bus LVDS SerDes,  
or to CML or LVPECL signals.  
2
1.5 Gbps Data Rate Per Channel  
Configurable Off/On Pre-emphasis Drives  
Lossy Backplanes and Cables  
LVDS/BLVDS/CML/LVPECL Compatible Inputs,  
LVDS Compatible Outputs  
Low Output Skew and Jitter  
On-chip 100Input and Output Termination  
15 kV ESD Protection on LVDS Inputs/Outputs  
Hot Plug Protection  
The 3.3V supply, CMOS process, and robust I/O  
ensure high performance at low power over the entire  
industrial -40 to +85°C temperature range.  
Single 3.3V Supply  
Industrial -40 to +85°C Temperature Range  
48-pin WQFN Package  
Typical Application  
Switch  
Fabric A  
FPGA  
or  
Mux Buffer  
ASIC  
Switch  
Fabric B  
Figure 1.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2005–2013, Texas Instruments Incorporated  
DS15MB200  
SNLS196E NOVEMBER 2005REVISED MARCH 2013  
www.ti.com  
Block Diagram  
PREA_0  
ENA_0  
PREB_0  
ENB_0  
LI_0  
SOA_0  
SOB_0  
PREL_0  
ENL_0  
SIA_0  
SIB_0  
LO_0  
MUX_S0  
Channel 0  
Channel 1  
Figure 2.  
PIN DESCRIPTIONS  
Pin  
Name  
WQFN Pin  
Number  
I/O, Type  
Description  
SWITCH SIDE DIFFERENTIAL INPUTS  
SIA_0+  
SIA_0  
30  
29  
I, LVDS  
I, LVDS  
I, LVDS  
I, LVDS  
Switch A-side Channel 0 inverting and non-inverting differential inputs. LVDS, Bus LVDS, CML, or  
LVPECL compatible.  
SIA_1+  
SIA_1−  
19  
20  
Switch A-side Channel 1 inverting and non-inverting differential inputs. LVDS, Bus LVDS, CML, or  
LVPECL compatible.  
SIB_0+  
SIB_0−  
28  
27  
Switch B-side Channel 0 inverting and non-inverting differential inputs. LVDS, Bus LVDS, CML, or  
LVPECL compatible.  
SIB_1+  
SIB_1−  
21  
22  
Switch B-side Channel 1 inverting and non-inverting differential inputs. LVDS, Bus LVDS, CML, or  
LVPECL compatible.  
LINE SIDE DIFFERENTIAL INPUTS  
LI_0+  
LI_0−  
40  
39  
I, LVDS  
Line-side Channel 0 inverting and non-inverting differential inputs. LVDS, Bus LVDS, CML, or  
LVPECL compatible.  
LI_1+  
LI_1−  
9
10  
I, LVDS  
Line-side Channel 1 inverting and non-inverting differential inputs. LVDS, Bus LVDS, CML, or  
LVPECL compatible.  
SWITCH SIDE DIFFERENTIAL OUTPUTS  
SOA_0+  
SOA_0−  
34  
33  
O, LVDS  
O, LVDS  
O, LVDS  
O, LVDS  
Switch A-side Channel 0 inverting and non-inverting differential outputs. LVDS compatible(1)(2)  
Switch A-side Channel 1 inverting and non-inverting differential outputs. LVDS compatible(1)(2)  
Switch B-side Channel 0 inverting and non-inverting differential outputs. LVDS compatible(1)(2)  
Switch B-side Channel 1 inverting and non-inverting differential outputs. LVDS compatible(1)(2)  
.
.
.
.
SOA_1+  
SOA_1−  
15  
16  
SOB_0+  
SOB_0−  
32  
31  
SOB_1+  
SOB_1−  
17  
18  
LINE SIDE DIFFERENTIAL OUTPUTS  
LO_0+  
LO_0−  
42  
41  
O, LVDS  
Line-side Channel 0 inverting and non-inverting differential outputs. LVDS compatible(1)(2)  
.
.
LO_1+  
LO_1−  
7
8
O, LVDS  
Line-side Channel 1 inverting and non-inverting differential outputs. LVDS compatible(1)(2)  
(1) For interfacing LVDS outputs to CML or LVPECL compatible inputs, refer to the applications section of this datasheet (planned).  
(2) The LVDS outputs do not support a multidrop (BLVDS) environment. The LVDS output characteristics of the DS15MB200 device have  
been optimized for point-to-point backplane and cable applications.  
2
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DS15MB200  
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SNLS196E NOVEMBER 2005REVISED MARCH 2013  
PIN DESCRIPTIONS (continued)  
Pin  
Name  
WQFN Pin  
Number  
I/O, Type  
Description  
DIGITAL CONTROL INTERFACE  
MUX_S0  
MUX_S1  
38  
11  
I, LVTTL  
Mux Select Control Inputs (per channel) to select which Switch-side input, A or B, is passed through  
to the Line-side.  
PREA_0  
PREA_1  
PREB_0  
PREB_1  
26  
23  
25  
24  
I, LVTTL  
Output pre-emphasis control for Switch-side outputs. Each output driver on the Switch A-side and B-  
side has a separate pin to control the pre-emphasis on or off.  
PREL_0  
PREL_1  
44  
5
I, LVTTL  
I, LVTTL  
Output pre-emphasis control for Line-side outputs. Each output driver on the Line A-side and B-side  
has a separate pin to control the pre-emphasis on or off.  
ENA_0  
ENA_1  
ENB_0  
ENB_1  
36  
13  
35  
14  
Output Enable Control for Switch A-side and B-side outputs. Each output driver on the A-side and  
B-side has a separate enable pin.  
ENL_0  
ENL_1  
45  
4
I, LVTTL  
Output Enable Control for The Line-side outputs. Each output driver on the Line-side has a separate  
enable pin.  
POWER  
VDD  
2, 6, 12,  
37, 43, 46,  
48  
3, 47(3)  
I, Power  
I, Power  
VDD = 3.3V ±0.3V.  
GND  
Ground reference for LVDS and CMOS circuitry.  
For the WQFN package, the DAP is used as the primary GND connection to the device. The DAP is  
the exposed metal contact at the bottom of the WQFN-48 package. It should be connected to the  
ground plane with at least 4 vias for optimal AC and thermal performance.  
(3) Note that the DAP on the backside of the WQFN package is the primary GND connection for the device when using the WQFN  
package.  
Connection Diagrams  
12 11 10  
13  
9
8
7
6
5
4
3
2
1
V
V
ENA_1  
ENB_1  
48  
DD  
DD  
ENA_1  
ENB_1  
Channel 1  
GND  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
GND  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
V
DD  
SOA_1+  
SOA_1-  
SOB_1+  
SOB_1-  
SIA_1+  
SIA_1-  
V
SOA_1+  
SOA_1-  
SOB_1+  
SOB_1-  
SIA_1+  
SIA_1-  
DD  
ENL_0  
ENL_0  
PREL_0  
PREL_0  
Channel 0  
V
DD  
V
DD  
DAP  
(GND)  
LO_0+  
LO_0-  
LI_0+  
LO_0+  
LO_0-  
LI_0+  
SIB_1+  
SIB_1-  
SIB_1+  
SIB_1-  
LI_0-  
LI_0-  
MUX_S0  
PREA_1  
PREB_1  
MUX_S0  
PREA_1  
PREB_1  
V
DD  
V
DD  
25 26 27 28 29 30 31 32 33 34 35 36  
Figure 3. WQFN Top View  
DAP = GND  
Figure 4. Directional Signal Paths Top View  
(Refer to pin names for signal polarity)  
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DS15MB200  
SNLS196E NOVEMBER 2005REVISED MARCH 2013  
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Output Characteristics  
The output characteristics of the DS15MB200 have been optimized for point-to-point backplane and cable  
applications, and are not intended for multipoint or multidrop signaling.  
A 100output (source) termination resistor is incorporated in the device to eliminate the need for an external  
resistor, providing excellent drive characteristics by locating the source termination as close to the output as  
physically possible.  
Pre-Emphasis Controls  
The pre-emphasis is used to compensate for long or lossy transmission media. Separate pins are provided for  
each output to minimize power consumption. Pre-emphasis is programmable to be off or on per the Pre-  
emphasis Control Table.  
PREx_n(1)  
Output Pre-Emphasis  
0
1
0%  
100%  
(1) Applies to PREA_0, PREA_1, PREB_0, PREB_1, PREL_0, PREL_1  
Multiplexer Truth Table(2)(3)  
Data Inputs  
Control Inputs  
Output  
LO_0  
SIB_0  
SIA_0  
Z
SIA_0  
X
SIB_0  
valid  
X
MUX_S0  
ENL_0  
0
1
X
1
1
0
valid  
X
X
(2) Same functionality for channel 1  
(3) X = Don't Care  
Z = High Impedance (TRI-STATE)  
Repeater/Buffer Truth Table(1)(2)  
Data Input  
Control Inputs  
Outputs  
LI_0  
X
ENA_0  
ENB_0  
SOA_0  
Z
SOB_0  
Z
0
0
1
1
0
1
0
1
valid  
valid  
valid  
Z
LI_0  
Z
LI_0  
LI_0  
LI_0  
(1) Same functionality for channel 1  
(2) X = Don't Care  
Z = High Impedance (TRI-STATE)  
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam  
during storage or handling to prevent electrostatic damage to the MOS gates.  
4
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DS15MB200  
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SNLS196E NOVEMBER 2005REVISED MARCH 2013  
Absolute Maximum Ratings(1)  
Value  
Unit  
Supply Voltage (VDD  
)
0.3 to +4.0  
V
V
V
CMOS Input Voltage  
-0.3 to  
(VDD+0.3)  
LVDS Receiver Input Voltage(2)  
LVDS Driver Output Voltage  
-0.3 to  
(VDD+0.3)  
-0.3 to  
(VDD+0.3)  
V
mA  
°C  
°C  
°C  
W
LVDS Output Short Circuit Current  
Junction Temperature  
+40  
+150  
Storage Temperature  
65 to +150  
Lead Temperature (Solder, 4sec)  
Max Pkg Power Capacity @ 25°C  
260  
5.2  
24  
Thermal Resistance (θJA  
)
°C/W  
mW/°C  
kV  
Package Derating above +25°C  
41.7  
8
HBM, 1.5k, 100pF  
LVDS pins to GND only  
EIAJ, 0, 200pF  
CDM  
15  
kV  
ESD Last Passing Voltage  
250  
1000  
V
V
(1) Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met,  
without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables.  
Texas Instruments does not recommend operation of products outside of recommended operation conditions.  
(2) VID max < 2.4V  
Recommended Operating Conditions  
Min  
Max  
Unit  
Supply Voltage (VCC  
Input Voltage (VI)(1)  
Output Voltage (VO)  
)
3.0  
0
3.6  
VCC  
VCC  
+85  
V
V
0
V
Operating Temperature (TA) Industrial  
(1) VID max < 2.4V  
40  
°C  
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SNLS196E NOVEMBER 2005REVISED MARCH 2013  
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Units  
Electrical Characteristics  
Over recommended operating supply and temperature ranges unless other specified.  
Symbol  
Parameter  
Conditions  
Min  
Typ(1)  
Max  
LVTTL DC SPECIFICATIONS (MUX_Sn, PREA_n, PREB_n, PREL_n, ENA_n, ENB_n, ENL_n)  
VIH  
VIL  
High Level Input Voltage  
Low Level Input Voltage  
High Level Input Current  
High Level Input Current  
Low Level Input Current  
Input Capacitance  
2.0  
GND  
10  
40  
VDD  
0.8  
V
V
IIH  
VIN = VDD = VDDMAX  
+10  
200  
+10  
µA  
µA  
µA  
pF  
pF  
V
IIHR  
IIL  
PREA_n, PREB_n, PREL_n  
VIN = VSS, VDD = VDDMAX  
Any Digital Input Pin to VSS  
Any Digital Output Pin to VSS  
ICL = 18 mA  
10  
CIN1  
COUT1  
VCL  
2.0  
4.0  
Output Capacitance  
Input Clamp Voltage  
1.5  
0.8  
LVDS INPUT DC SPECIFICATIONS (SIA±, SIB±, LI±)  
VTH  
Differential Input High Threshold(2)  
VCM = 0.8V or 1.2V or 3.55V,  
VDD = 3.6V  
0
0
100  
mV  
mV  
VTL  
Differential Input Low Threshold(2)  
VCM = 0.8V or 1.2V or 3.55V,  
VDD = 3.6V  
100  
VID  
Differential Input Voltage  
Common Mode Voltage Range  
Input Capacitance  
VCM = 0.8V to 3.55V, VDD = 3.6V  
VID = 150 mV, VDD = 3.6V  
IN+ or INto VSS  
100  
2400  
3.55  
mV  
V
VCMR  
CIN2  
IIN  
0.05  
2.0  
pF  
µA  
µA  
Input Current  
VIN = 3.6V, VDD = VDDMAX or 0V  
VIN = 0V, VDD = VDDMAX or 0V  
15  
15  
+15  
+15  
LVDS OUTPUT DC SPECIFICATIONS (SOA_n±, SOB_n±, LO_n±)  
VOD  
Differential Output Voltage,  
0% Pre-emphasis(2)  
RL is the internal 100between OUT+  
and OUT−  
250  
360  
500  
mV  
ΔVOD  
Change in VOD between  
Complementary States  
Offset Voltage(3)  
-35  
1.05  
-35  
35  
1.475  
35  
mV  
V
VOS  
1.22  
ΔVOS  
Change in VOS between  
Complementary States  
mV  
mA  
pF  
IOS  
Output Short Circuit Current  
Output Capacitance  
OUT+ or OUTShort to GND  
21  
-40  
COUT2  
OUT+ or OUTto GND when TRI-  
STATE  
4.0  
SUPPLY CURRENT (Static)  
ICC  
Supply Current  
All inputs and outputs enabled and  
active, terminated with external load of  
100between OUT+ and OUT-.  
225  
0.6  
275  
4.0  
mA  
mA  
ICCZ  
Supply Current - Powerdown Mode  
ENA_0 = ENB_0 = ENL_0 = ENA_1 =  
ENB_1 = ENL_1 = L  
SWITCHING CHARACTERISTICS—LVDS OUTPUTS  
tLHT  
Differential Low to High Transition  
Time  
Use an alternating 1 and 0 pattern at 200  
170  
170  
1.0  
250  
250  
2.5  
ps  
ps  
ns  
Mb/s, measure between 20% and 80% of  
(4)  
VOD  
.
tHLT  
Differential High to Low Transition  
Time  
tPLHD  
tPHLD  
Differential Low to High Propagation Use an alternating 1 and 0 pattern at 200  
Delay  
Mb/s, measure at 50% VOD between  
input to output.  
Differential High to Low Propagation  
Delay  
1.0  
25  
50  
2.5  
75  
ns  
ps  
ps  
(4)  
tSKD1  
tSKCC  
Pulse Skew  
|tPLHD–tPHLD|  
Output Channel to Channel Skew  
Difference in propagation delay (tPLHD or  
tPHLD) among all output channels.(4)  
115  
(1) Typical parameters are measured at VDD = 3.3V, TA = 25°C. They are for reference purposes, and are not production-tested.  
(2) Differential output voltage VOD is defined as ABS(OUT+–OUT). Differential input voltage VID is defined as ABS(IN+–IN).  
(3) Output offset voltage VOS is defined as the average of the LVDS single-ended output voltages at logic high and logic low states.  
(4) Not production tested. Guaranteed by statistical analysis on a sample basis at the time of characterization.  
6
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Electrical Characteristics (continued)  
Over recommended operating supply and temperature ranges unless other specified.  
Symbol  
Parameter  
Conditions  
Min  
Typ(1)  
1.1  
Max  
1.5  
34  
Units  
psrms  
psp-p  
psp-p  
tJIT  
Jitter (0% Pre-emphasis)(5)  
RJ - Alternating 1 and 0 at 750MHz(6)  
DJ - K28.5 Pattern, 1.5 Gbps(7)  
TJ - PRBS 27-1 Pattern, 1.5 Gbps(8)  
20  
14  
28  
tON  
LVDS Output Enable Time  
Time from ENA_n, ENB_n, or ENL_n to  
OUT± change from TRI-STATE to active.  
0.5  
1.5  
µs  
tON2  
LVDS Output Enable Time from  
Powerdown Mode  
Time from ENA_n, ENB_n, or ENL_n to  
OUT± change from Powerdown Mode to  
active.  
10  
20  
µs  
tOFF  
LVDS Output Disable Time  
Time from ENA_n, ENB_n, or ENL_n to  
OUT± change from active to TRI-STATE  
or Powerdown mode.  
12  
ns  
(5) Jitter is not production tested, but guaranteed through characterization on a sample basis.  
(6) Random Jitter, or RJ, is measured RMS with a histogram including 1500 histogram window hits. The input voltage = VID = 500mV, 50%  
duty cycle at 750MHz, tr = tf = 50ps (20% to 80%).  
(7) Deterministic Jitter, or DJ, is measured to a histogram mean with a sample size of 350 hits. Stimulus and fixture jitter have been  
subtracted. The input voltage = VID = 500mV, K28.5 pattern at 1.5 Gbps, tr = tf = 50ps (20% to 80%). The K28.5 pattern is repeating bit  
streams of (0011111010 1100000101).  
(8) Total Jitter, or TJ, is measured peak to peak with a histogram including 3500 window hits. Stimulus and fixture jitter have been  
subtracted. The input voltage = VID = 500mV, 27-1 PRBS pattern at 1.5 Gbps, tr = tf = 50ps (20% to 80%).  
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WQFN Performance Characteristics  
Power Supply Current vs. Bit Data Rate  
350  
Total Jitter vs. Bit Data Rate  
60  
300  
250  
200  
150  
100  
50  
50  
40  
30  
20  
10  
0
PRE-EMPHASIS ON  
PRE-EMPHASIS OFF  
VCM = 1.2V  
VCM = 0.25V  
VCM = 3.0V  
0
0
500  
1000  
1500  
2000  
0
500  
1000  
1500  
2000  
BIT DATA RATE (Mbps)  
BIT DATA RATE (Mbps)  
Dynamic power supply current was measured with all channels  
active and toggling at the bit data rate. Data pattern has no effect  
on the power consumption.  
Total Jitter measured at 0V differential while running a PRBS 27-1  
pattern with one channel active, all other channels are disabled.  
VDD = 3.3V, TA = +25°C, VID = 0.5V, pre-emphasis off.  
VDD = 3.3V, TA = +25°C, VID = 0.5V, VCM = 1.2V  
Figure 5.  
Figure 6.  
Total Jitter vs. Temperature  
30  
25  
20  
15  
10  
5
0
-40 -20  
0
20  
40  
60  
80 100  
TEMPERATURE (°C)  
Total Jitter measured at 0V differential while running a PRBS 27-1 pattern with one channel active, all other channels are disabled. VDD  
=
3.3V, VID = 0.5V, VCM = 1.2V, 1.5 Gbps data rate, pre-emphasis off.  
Figure 7.  
8
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TRI-STATE AND POWERDOWN MODES  
The DS15MB200 has output enable control on each of the six onboard LVDS output drivers. This control allows  
each output individually to be placed in a low power TRI-STATE mode while the device remains active, and is  
useful to reduce power consumption on unused channels. In TRI-STATE mode, some outputs may remain active  
while some are in TRI-STATE.  
When all six of the output enables (all drivers on both channels) are deasserted (LOW), then the device enters a  
Powerdown mode that consumes only 0.5mA (typical) of supply current. In this mode, the entire device is  
essentially powered off, including all receiver inputs, output drivers and internal bandgap reference generators.  
When returning to active mode from Powerdown mode, there is a delay until valid data is presented at the  
outputs because of the ramp to power up the internal bandgap reference generators.  
Any single output enable that remains active will hold the device in active mode even if the other five outputs are  
in TRI-STATE.  
When in Powerdown mode, any output enable that becomes active will wake up the device back into active  
mode, even if the other five outputs are in TRI-STATE.  
Input Failsafe Biasing  
External pull up and pull down resistors may be used to provide enough of an offset to enable an input failsafe  
under open-circuit conditions. This configuration ties the positive LVDS input pin to VDD thru a pull up resistor  
and the negative LVDS input pin is tied to GND by a pull down resistor. The pull up and pull down resistors  
should be in the 5kto 15krange to minimize loading and waveform distortion to the driver. The common-  
mode bias point ideally should be set to approximately 1.2V (less than 1.75V) to be compatible with the internal  
circuitry. Please refer to application note AN-1194, “Failsafe Biasing of LVDS Interfaces” (SNLA051) for more  
information.  
Interfacing LVPECL to LVDS  
An LVPECL driver consists of a differential pair with coupled emitters connected to GND via a current source.  
This drives a pair of emitter-followers that require a 50 ohm to VCC-2.0 load. A modern LVPECL driver will  
typically include the termination scheme within the device for the emitter follower. If the driver does not include  
the load, then an external scheme must be used. The 1.3 V supply is usually not readily available on a PCB,  
therefore, a load scheme without a unique power supply requirement may be used.  
50W  
15MB200  
LVPECL  
50W  
R1  
R2  
150W 150W  
Figure 8. DC Coupled LVPECL to LVDS Interface  
Figure 8 is a separated π termination scheme for a 3.3 V LVPECL driver. R1 and R2 provides proper DC load for  
the driver emitter followers, and may be included as part of the driver device(1). The DS15MB200 includes a 100  
ohm input termination for the transmission line. The common mode voltage will be at the normal LVPECL  
levels – around 2 V. This scheme works well with LVDS receivers that have rail-to-rail common mode voltage,  
VCM, range. Most Texas Instrument's LVDS receivers have wide VCM range. The exceptions are noted in devices’  
respective datasheets. Those LVDS devices that do have a wide VCM range do not vary in performance  
significantly when receiving a signal with a common mode other than standard LVDS VCM of 1.2 V.  
(1) The bias networks shown above for LVPECL drivers and receivers may or may not be present within the driver device. The LVPECL  
driver and receiver specification must be reviewed closely to ensure compatibility between the driver and receiver terminations and  
common mode operating ranges.  
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DS15MB200  
SNLS196E NOVEMBER 2005REVISED MARCH 2013  
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0.1 mF  
0.1 mF  
50W  
50W  
15MB200  
LVPECL  
R1  
R2  
150W  
150W  
Figure 9. AC Coupled LVPECL to LVDS Interface  
An AC coupled interface is preferred when transmitter and receiver ground references differ more than 1 V. This  
is a likely scenario when transmitter and receiver devices are on separate PCBs. Figure 9 illustrates an AC  
coupled interface between a LVPECL driver and LVDS receiver. R1 and R2, if not present in the driver device(2),  
provide DC load for the emitter followers and may range between 140-220 ohms for most LVPECL devices for  
this particular configuration. The DS15MB200 includes an internal 100 ohm resistor to terminate the transmission  
line for minimal reflections. The signal after AC coupling capacitors will swing around a level set by internal  
biasing resistors (i.e. fail-safe) which is either VDD/2 or 0 V depending on the actual failsafe implementation. If  
internal biasing is not implemented, the signal common mode voltage will slowly wander to GND level.  
Interfacing LVDS to LVPECL  
An LVDS driver consists of a current source (nominal 3.5mA) which drives a CMOS differential pair. It needs a  
differential resistive load in the range of 70 to 130 ohms to generate LVDS levels. In a system, the load should  
be selected to match transmission line characteristic differential impedance so that the line is properly  
terminated. The termination resistor should be placed as close to the receiver inputs as possible. When  
interfacing an LVDS driver with a non-LVDS receiver, one only needs to bias the LVDS signal so that it is within  
the common mode range of the receiver. This may be done by using separate biasing voltage which demands  
another power supply. Some receivers have required biasing voltage available on-chip (VT, VTT or VBB).  
50W  
LVPECL  
15MB200  
50W  
R1  
R2  
50W  
50W  
V
T
Figure 10. DC Coupled LVDS to LVPECL Interface  
Figure 10 illustrates interface between an LVDS driver and a LVPECL with a VT pin available. R1 and R2, if not  
present in the receiver(2), provide proper resistive load for the driver and termination for the transmission line,  
and VT sets desired bias for the receiver.  
(2) The bias networks shown above for LVPECL drivers and receivers may or may not be present within the driver device. The LVPECL  
driver and receiver specification must be reviewed closely to ensure compatibility between the driver and receiver terminations and  
common mode operating ranges.  
10  
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Product Folder Links: DS15MB200  
 
 
DS15MB200  
www.ti.com  
SNLS196E NOVEMBER 2005REVISED MARCH 2013  
V
DD  
R1  
R2  
83W  
83W  
0.1 mF  
0.1 mF  
50W  
50W  
LVPECL  
15MB200  
R3  
R4  
130W 130W  
Figure 11. AC Coupled LVDS to LVPECL Interface  
Figure 11 illustrates AC coupled interface between an LVDS driver and LVPECL receiver without a VT pin  
available. The resistors R1, R2, R3, and R4, if not present in the receiver(2), provide a load for the driver,  
terminate the transmission line, and bias the signal for the receiver.  
Packaging Information  
The Leadless Leadframe Package (WQFN) is a leadframe based chip scale package (CSP) that may enhance  
chip speed, reduce thermal impedance, and reduce the printed circuit board area required for mounting. The  
small size and very low profile make this package ideal for high density PCBs used in small-scale electronic  
applications such as cellular phones, pagers, and handheld PDAs. The WQFN package is offered in the no  
Pullback configuration. In the no Pullback configuration the standard solder pads extend and terminate at the  
edge of the package. This feature offers a visible solder fillet after board mounting.  
The WQFN has the following advantages:  
Low thermal resistance  
Reduced electrical parasitics  
Improved board space efficiency  
Reduced package height  
Reduced package mass  
For more details about WQFN packaging technology, refer to applications note AN-1187, "Leadless Leadframe  
Package" (SNOA401).  
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DS15MB200  
SNLS196E NOVEMBER 2005REVISED MARCH 2013  
www.ti.com  
REVISION HISTORY  
Changes from Revision D (March 2013) to Revision E  
Page  
Changed layout of National Data Sheet to TI format .......................................................................................................... 11  
12  
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Copyright © 2005–2013, Texas Instruments Incorporated  
Product Folder Links: DS15MB200  
PACKAGE OPTION ADDENDUM  
www.ti.com  
10-Dec-2020  
PACKAGING INFORMATION  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan  
Lead finish/  
Ball material  
MSL Peak Temp  
Op Temp (°C)  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4/5)  
(6)  
DS15MB200TSQ/NOPB  
DS15MB200TSQX/NOPB  
ACTIVE  
ACTIVE  
WQFN  
WQFN  
RHS  
RHS  
48  
48  
250  
RoHS & Green  
SN  
Level-3-260C-168 HR  
Level-3-260C-168 HR  
-40 to 85  
-40 to 85  
15M200  
15M200  
2500 RoHS & Green  
SN  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance  
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may  
reference these types of products as "Pb-Free".  
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.  
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based  
flame retardants must also meet the <=1000ppm threshold requirement.  
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.  
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.  
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation  
of the previous line and the two combined represent the entire Device Marking for that device.  
(6)  
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two  
lines if the finish value exceeds the maximum column width.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information  
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and  
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.  
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
10-Dec-2020  
Addendum-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
9-Aug-2022  
TAPE AND REEL INFORMATION  
REEL DIMENSIONS  
TAPE DIMENSIONS  
K0  
P1  
W
B0  
Reel  
Diameter  
Cavity  
A0  
A0 Dimension designed to accommodate the component width  
B0 Dimension designed to accommodate the component length  
K0 Dimension designed to accommodate the component thickness  
Overall width of the carrier tape  
W
P1 Pitch between successive cavity centers  
Reel Width (W1)  
QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE  
Sprocket Holes  
Q1 Q2  
Q3 Q4  
Q1 Q2  
Q3 Q4  
User Direction of Feed  
Pocket Quadrants  
*All dimensions are nominal  
Device  
Package Package Pins  
Type Drawing  
SPQ  
Reel  
Reel  
A0  
B0  
K0  
P1  
W
Pin1  
Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant  
(mm) W1 (mm)  
DS15MB200TSQ/NOPB WQFN  
DS15MB200TSQX/NOPB WQFN  
RHS  
RHS  
48  
48  
250  
178.0  
330.0  
16.4  
16.4  
7.3  
7.3  
7.3  
7.3  
1.3  
1.3  
12.0  
12.0  
16.0  
16.0  
Q1  
Q1  
2500  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
9-Aug-2022  
TAPE AND REEL BOX DIMENSIONS  
Width (mm)  
H
W
L
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
SPQ  
Length (mm) Width (mm) Height (mm)  
DS15MB200TSQ/NOPB  
DS15MB200TSQX/NOPB  
WQFN  
WQFN  
RHS  
RHS  
48  
48  
250  
208.0  
356.0  
191.0  
356.0  
35.0  
35.0  
2500  
Pack Materials-Page 2  
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IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD  
PARTY INTELLECTUAL PROPERTY RIGHTS.  
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TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable  
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These resources are subject to change without notice. TI grants you permission to use these resources only for development of an  
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