DS92CK16 [TI]

3V BLVDS 1:6 时钟缓冲器/总线收发器;
DS92CK16
型号: DS92CK16
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

3V BLVDS 1:6 时钟缓冲器/总线收发器

时钟 总线收发器
文件: 总20页 (文件大小:1120K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
DS92CK16  
www.ti.com  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
DS92CK16 3V BLVDS 1 to 6 Clock Buffer/Bus Transceiver  
Check for Samples: DS92CK16  
1
FEATURES  
DESCRIPTION  
The DS92CK16 1 to 6 Clock Buffer/Bus Transceiver  
is a one to six CMOS differential clock distribution  
device utilizing Bus Low Voltage Differential Signaling  
(BLVDS) technology. This clock distribution device is  
designed for applications requiring ultra low power  
dissipation, low noise, and high data rates. The  
BLVDS side is a transceiver with a separate channel  
acting as a return/source clock.  
2
Master/Slave Clock Selection in a Backplane  
Application  
125 MHz Operation (Typical)  
100 ps Duty Cycle Distortion (Typical)  
50 ps Channel to Channel Skew (Typical)  
3.3V Power Supply Design  
Glitch-free Power on at CLKI/O Pins  
Low Power Design (20 mA @ 3.3V Static)  
The DS92CK16 accepts LVDS (300 mV typical)  
differential input levels, and translates them to 3V  
CMOS output levels. An output enable pin OE , when  
high, forces all CLKOUT pins high.  
Accepts Small Swing (300 mV Typical)  
Differential Signal Levels  
Industrial Temperature Operating Range (-40°C  
to +85°C)  
The device can be used as a source synchronous  
driver. The selection of the source driving is  
controlled by the CrdCLKIN and DE pins. This device  
can be the master clock, driving the inputs of other  
clock I/O pins in a multipoint environment. Easy  
master/slave clock selection is achieved along a  
backplane.  
Available in 24-pin TSSOP Packaging  
Function Diagram and Truth Table  
Table 1. Receive Mode Truth Table  
INPUT  
OUTPUT  
OE  
H
DE  
H
CrdCLKIN  
(CLKI/O+)–(CLKI/O)  
X
CLKOUT  
X
X
X
H
H
L
L
H
VID0.07V  
VID≤ −0.07V  
L
H
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.  
2
All trademarks are the property of their respective owners.  
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 © 1999–2013, Texas Instruments Incorporated  
DS92CK16  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
www.ti.com  
Table 2. Driver Mode Truth Table  
INPUT  
OUTPUT  
OE  
L
DE  
L
CrdCLKIN  
CLK/I/O+  
CLKI/O−  
CLKOUT  
L
H
L
L
H
L
H
L
L
L
L
H
H
H
H
H
H
H
L
H
L
L
H
X
H
Z
H
Z
Connection Diagram  
TSSOP Package  
See Package Number PW (R-PDSO-G24)  
TSSOP PACKAGE PIN DESCRIPTIONS  
Description  
Pin Name  
CLKI/O+  
CLKI/O−  
OE  
Pin #  
Type  
I/O  
I/O  
I
6
7
2
True (Positive) side of the differential clock input.  
Complementary (Negative) side of the differential clock input.  
OE; this pin is active Low. When High, this pin forces all CLKOUT pins High. When Low,  
CLKOUT pins logic state is determined by either the CrdCLKIN or the VID at the CLK/I/O pins  
with respect to the logic level at the DE pin. This pin has a weak pullup device to VCC. If OE  
is floating, then all CLKOUT pins will be High.  
DE  
11  
I
DE; this pin is active LOW. When Low, this pin enables the CardCLKIN signal to the CLKI/O  
pins and CLKOUT pins. When High, the Driver is TRI-STATE, the CLKI/O pins are inputs and  
determine the state of the CLKOUT pins. This pin has a weak pullup device to VCC. If DE is  
floating, then CLKI/O pins are TRI-STATE.  
CLKOUT  
13, 15, 17,  
19, 21, 23  
O
6 Buffered clock (CMOS) outputs.  
CrdCLKIN  
VCC  
9
I
Input clock from Card (CMOS level or TTL level).  
16, 20, 24  
Power  
VCC; Analog VCCA (Internally separate from VCC, connect externally or use separate power  
supplies). No special power sequencing required. Either VCCA or VCC can be applied first, or  
simultaneously apply both power supplies.  
GND  
VCCA  
1, 12, 14, 18,  
22  
Ground  
Power  
GND  
4
Analog VCCA (Internally separate from VCC, connect externally or use separate power  
supplies). No special power sequencing required. Either VCCA or VCC can be applied first, or  
simultaneously apply both power supplies.  
GNDA  
NC  
5, 8  
Ground  
Analog Ground (Internally separate from Ground must be connected externally).  
No Connects  
3, 10  
2
Submit Documentation Feedback  
Copyright © 1999–2013, Texas Instruments Incorporated  
Product Folder Links: DS92CK16  
DS92CK16  
www.ti.com  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
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.  
(1)(2)  
Absolute Maximum Ratings  
Supply Voltage (VCC  
)
0.3V to +4V  
Enable Input Voltage  
(DE, OE, CrdCLKIN  
)
0.3V to +4V  
0.3V to (VCC + 0.3V)  
0.3V to +4V  
Voltage (CLKOUT  
)
Voltage (CLKI/O±)  
Driver Short Circuit Current  
Receiver Short Circuit Current  
Maximum Package Power Dissipation at +25°C  
PW Package  
momentary  
momentary  
1500 mW  
8.2 mW/°C above +25°C  
95°C/W  
Derate PW Package  
θJA  
θJC  
30°C/W  
Storage Temperature Range  
Lead Temperature Range  
(Soldering, 4 sec.)  
65°C to +150°C  
260°C  
>3000V  
>1000V  
>200V  
(3)  
ESD Ratings: HBM  
(3)  
CDM  
(3)  
Machine Model  
(1) “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be verified. These ratings are not meant to  
imply that the devices should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device  
operation.  
(2) If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.  
(3) ESD Rating: ESD qualification is performed per the following: HBM (1.5 k, 100 pF), Machine Model (250V, 0), IEC 1000-4-2. All VCC  
pins connected together, all ground pins connected together.  
Recommended Operating Conditions  
Min  
Typ  
Max  
Units  
Supply Voltage (VCC  
)
+3.0  
+3.3  
+3.6  
V
CrdCLKIN, DE, OE  
Input Voltage  
0
VCC  
+85  
V
Operating Free Air  
Temperature (TA)  
40  
25  
°C  
DC Electrical Characteristics  
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified  
(1) (2)  
.
Symbol  
VTH  
Parameter  
Input Threshold High  
Input Threshold Low  
Conditions  
Pin  
Min  
Typ  
Max  
Units  
CLKI/O+,  
CLKI/O−  
25  
+70  
mV  
mV  
VTL  
70  
-35  
VCMR Common Mode Voltage  
VID = 250 mV pk to pk  
|VID|/2  
2.4 - |VID|/2  
+20  
V
(3)  
Range  
IIN  
Input Current  
VIN = 0V to VCC, DE = VCC, OE =  
VCC, Other Input = 1.2V ± 50 mV  
20  
±5  
µA  
(1) Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground  
except VID, VOD, VTH, and VTL.  
(2) All typicals are given for: VCC = +3.3V and TA = +25°C.  
(3) The VCMR range is reduced for larger VID. Example: If VID=400 mV, then VCMR is 0.2V to 2.2V A VID up to |VCC–0V| may be applied  
between the CLKI/O+ and CLKI/Oinputs, with the Common Mode set to VCC/2.  
Copyright © 1999–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
3
Product Folder Links: DS92CK16  
DS92CK16  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
www.ti.com  
DC Electrical Characteristics (continued)  
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (1) (2)  
.
Symbol  
VOH1R  
VOH2R  
VOL1R  
VOL2R  
IODHR  
Parameter  
Output High Voltage  
Output High Voltage  
Output Low Voltage  
Output Low Voltage  
CLKOUT Dynamic Output  
Conditions  
Pin  
Min  
Typ  
2.9  
Max  
Units  
VID = 250 mV, IOH = 1.0 mA  
VID = 250 mV, IOH = 6 mA  
IOL = 1.0 mA, VID = 250 mV  
IOL = 6 mA, VID = 250 mV  
VID = +250 mV, VOUT = VCC1V  
CLKOUT  
V
CC0.4  
CC0.8  
V
V
V
V
V
2.5  
0.06  
0.3  
0.4  
0
8  
-16  
21  
-30  
35  
mA  
mA  
(4)  
Current  
IODLR  
CLKOUT Dynamic Output  
VID = 250 mV, VOUT = 1V  
10  
(4)  
Current  
VIH  
VIL  
Input High Voltage  
Input Low Voltage  
Input High Current  
Input Low Current  
Input Current  
DE, OE,  
CrdCLKIN  
2.0  
GND  
10  
20  
5  
VCC  
0.8  
V
V
IIH  
VIN = VCC or 2.4V  
OE, DE  
2  
5  
+10  
+20  
+5  
µA  
µA  
µA  
IIL  
VIN = GND or 0.4V  
VIN = 0V to VCC, OE = VCC  
IOUT = 1.5 mA  
IINCRD  
VCL  
CrdCLKIN  
Input Voltage Clamp  
OE, DE,  
CrdCLKIN  
0.8  
V
ICC  
No Load Supply Current  
Outputs Enabled, No VID  
Applied  
OE = DE = 0V,  
CrdCLKIN = VCC or GND,  
CLKI/O (±) = Open  
VCC  
13  
10  
mA  
CLKOUT (0:5) = Open Circuit  
ICC1  
No Load Supply Current  
OE = GND  
Outputs Enabled, VID over DE = VCC  
Common Mode Voltage  
Range  
CrdCLKIN = VCC or GND,  
VID = 250 mV  
mA  
(0.125V VCM 2.275V),  
CLKOUT (0:5) = Open Circuit  
ICCD  
Driver Loaded Supply  
Current  
DE = OE = 0V,  
CrdCLKIN = VCC or GND,  
RL = 37.5between CLKI/O+ and  
CLKI/O,  
20  
25  
mA  
mV  
CLKOUT (0:5) = Open Circuit  
VOD  
Driver Output Differential  
Voltage  
RL = 37.5, Figure 5  
DE = 0V  
CLKI/O+,  
CLKI/O−  
250  
1.1  
350  
450  
ΔVOD  
Driver VOD Magnitude  
Change  
10  
1.29  
5
20  
1.5  
20  
mV  
V
VOS  
Driver Offset Voltage  
ΔVOS  
Driver Offset Voltage  
Magnitude Change  
mV  
VOHD  
VOLD  
IOS1D  
Driver Output High  
Driver Output Low  
1.35  
1.05  
1.8  
V
V
0.80  
Driver Differential Short  
CrdCLKIN = VCC or GND, VOD = 0V,  
(outputs shorted together) DE = 0V  
|30|  
36  
|50|  
70  
mA  
mA  
mA  
mA  
mA  
µA  
(5)  
Circuit Current  
IOS2D  
IOS3D  
IOS4D  
IOS5D  
IOFF  
Driver Output Short Circuit CrdCLKIN = GND, DE = 0V, CLKI/O+  
(5)  
Current to VCC  
= VCC  
Driver Output Short Circuit CrdCLKIN = VCC, DE = 0V, CLKI/O−  
34  
70  
(5)  
Current to VCC  
= VCC  
Driver Output Short Circuit CrdCLKIN = VCC, DE = 0V, CLKI/O+  
47  
50  
70  
70  
±20  
(5)  
Current to GND  
= 0V  
Driver Output Short Circuit CrdCLKIN = GND, DE = 0V, CLKI/O−  
(5)  
Current to GND  
= 0V  
Power Off Leakage Current VCC = 0V or Open,  
VAPPLIED = 3.6V  
(4) Only one output should be momentarily shorted at a time. Do not exceed package power dissipation rating.  
(5) Only one output should be momentarily shorted at a time. Do not exceed package power dissipation rating.  
4
Submit Documentation Feedback  
Copyright © 1999–2013, Texas Instruments Incorporated  
Product Folder Links: DS92CK16  
 
DS92CK16  
www.ti.com  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
Switching Characteristics  
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified  
(1) (2)  
.
Symbol  
Parameter  
Conditions  
Min  
Typ  
Max  
Units  
DIFFERENTIAL RECEIVER CHARACTERISTICS  
tPHLDR  
tPLHDR  
tSK1R  
Differential Propagation Delay High to Low. CLKI/O to CLKOUT CL = 15 pF  
1.3  
1.3  
2.8  
2.9  
3.8  
3.8  
ns  
ns  
VID = 250 mV  
Figure 1 Figure 2  
Differential Propagation Delay Low to High. CLKI/O to CLKOUT  
Duty Cycle Distortion(3)  
(pulse skew)  
100  
30  
400  
ps  
|tPLH–tPHL  
|
(4)  
tSK2R  
tSK3R  
tTLHR  
Channel to Channel Skew; Same Edge  
80  
ps  
ns  
(5)  
Part to Part Skew  
2.5  
(6)  
Transition Time Low to High  
0.4  
0.4  
1.0  
1.4  
1.3  
3
2.4  
2.2  
4.5  
4.5  
ns  
ns  
ns  
(20% to 80% )  
Transition Time High to Low(6)  
(80% to 20% )  
tTHLR  
tPLHOER  
tPHLOER  
fMAX  
Propagation Delay Low to High  
CL = 15 pF  
( OEto CLKOUT  
Propagation Delay High to Low  
(OE to CLKOUT  
Maximum Operating Frequency  
)
Figure 3 Figure 4  
1.0  
3
ns  
)
(7)  
100  
125  
MHz  
DIFFERENTIAL DRIVER TIMING REQUIREMENTS  
tPHLDD  
Differential Propagation Delay High to Low. CrdCLKIN to  
CLKI/O  
CL = 15 pF  
RL = 37.5Ω  
Figure 6 Figure 7  
0.5  
0.5  
1.8  
1.8  
2.5  
2.5  
ns  
ns  
tPLHDD  
Differential Propagation Delay Low to High. CrdCLKIN to  
CLKI/O  
tPHLCrd  
tPLHCrd  
tSK1D  
CrdCLKIN to CLKOUT Propagation Delay High to Low  
CrdCLKIN to CLKOUT Propagation Delay Low to High  
CL = 15 pF  
Figure 8 Figure 9  
2.0  
2.0  
4.5  
4.5  
6.0  
6.0  
ns  
ns  
Duty Cycle Distortion (pulse skew)  
600  
2.0  
1.4  
ps  
ns  
ns  
(8)  
|tPLH–tPHL  
|
(9)  
tSK2D  
tTLHD  
Differential Part-to-Part Skew  
(6)  
Differential Transition Time  
(20% to 80% )  
0.4  
0.4  
0.75  
0.75  
(6)  
tTHLD  
Differential Transition Time  
(80% to 20% )  
1.4  
ns  
tPHZD  
tPLZD  
tPZHD  
tPZLD  
fMAX  
Transition Time High to TRI-STATE. DE to CLKI/O  
Transition Time Low to TRI-STATE. DE to CLKI/O  
Transition Time TRI-STATE to High. DE to CLKI/O  
Transition Time TRI-STATE to Low. DE to CLKI/O  
10  
10  
32  
32  
ns  
ns  
VIN = 0V to VCC  
CL = 15 pF,  
RL = 37.5Ω  
ns  
ns  
Figure 10 Figure 11  
(7)  
Maximum Operating Frequency  
100  
125  
MHz  
(1) CL includes probe and fixture capacitance.  
(2) Generator waveform for all tests unless otherwise specified: f = 25 MHz, Zo = 50, tr = 1 ns, tf = 1 ns (10%–90%). To ensure fastest  
propagation delay and minimum skew, clock input edge rates should not be slower than 1 ns/V; control signals not slower than 3 ns/V.  
In general, the faster the input edge rate, the better the AC performance.  
(3) tSK1R is the difference in receiver propagation delay (|tPLH–tPHL|) of one device, and is the duty cycle distortion of the output at any given  
temperature and VCC. The propagation delay specification is a device to device worst case over process, voltage and temperature.  
(4) tSK2R is the difference in receiver propagation delay between channels in the same device of any outputs switching in the same  
direction. This parameter is specified by design and characterization.  
(5) tSK3R, part-to-part skew, is the difference in receiver propagation delay between devices of any outputs switching in the same direction.  
This specification applies to devices over recommended operating temperature and voltage ranges, and across process distribution.  
TSK3R is defined as Max–Min differential propagation delay.This parameter is specified by design and characterization.  
(6) All device output transition times are based on characterization measurements and are specified by design.  
(7) Generator input conditions: tr/tf < 1 ns, 50% duty cycle, differential (1.10V to 1.35V pk-pk). Output Criteria: 60%/40% duty cycle,  
VOL(max) 0.4V, VOH(min) 2.7V, Load = 7 pF (stray plus probes).  
(8) tSK1D is the difference in driver propagation delay (|tPLH–tPHL|) and is the duty cycle distortion of the CLKI/O outputs.  
(9) tSK2D part-to-part skew, is the difference in driver propagation delay between devices of any outputs switching in the same direction.  
This specification applies to devices over recommended operating temperature and voltage ranges, and across process distribution.  
tSK2D is defined as Max–Min differential propagation delay.  
Copyright © 1999–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
5
Product Folder Links: DS92CK16  
DS92CK16  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
www.ti.com  
PARAMETER MEASUREMENT INFORMATION  
Figure 1. Receiver Propagation Delay and Transition Time Test Circuit  
Generator waveform for all test unless otherwise specified: f = 25 MHz, 50% Duty Cycle, Zo = 50, tTLH = 1 ns, tTHL  
=
1 ns.  
Figure 2. Receiver Propagation Delay and Transition Time Waveforms  
Figure 3. Output Enable (OE) Delay Test Circuit  
Figure 4. Output Enable (OE) Delay Waveforms  
6
Submit Documentation Feedback  
Copyright © 1999–2013, Texas Instruments Incorporated  
Product Folder Links: DS92CK16  
DS92CK16  
www.ti.com  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
Figure 5. Differential Driver DC Test  
Figure 6. Driver Propagation Delay Test Circuit  
Figure 7. Driver Propagation Delay and Transition Time Waveforms  
Figure 8. CrdCLKIN Propagation Delay Time Test Circuit  
Copyright © 1999–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
7
Product Folder Links: DS92CK16  
DS92CK16  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
www.ti.com  
Figure 9. CrdCLKIN Propagation Delay Time Waveforms  
Figure 10. Driver TRI-STATE Test Circuit  
Figure 11. Driver TRI-STATE Waveforms  
8
Submit Documentation Feedback  
Copyright © 1999–2013, Texas Instruments Incorporated  
Product Folder Links: DS92CK16  
DS92CK16  
www.ti.com  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
APPLICATIONS INFORMATION  
General application guidelines and hints for BLVDS/LVDS transceivers, drivers and receivers may be found in  
the following application notes: LVDS Owner's Manual, AN805(SNOA233), AN807(SNLA027), AN808(SNLA028),  
AN903(SNLA034), AN905(SNLA035), AN916(SNLA219), AN971(SNLA165), AN977(SNLA166) .  
BLVDS drivers and receivers are intended to be used in a differential backplane configuration. Transceivers or  
receivers are connected to the driver through a balanced media such as differential PCB traces. Typically, the  
characteristic differential impedance of the media (Zo) is in the range of 50Ω to100Ω. Two termination resistors of  
ZoΩ each are placed at the ends of the transmission line backplane. The termination resistor converts the  
current sourced by the driver into a voltage that is detected by the receiver. The effects of mid-stream  
connector(s), cable stub(s), and other impedance discontinuities as well as ground shifting, noise margin limits,  
and total termination loading must be taken into account.  
The DS92CK16 differential line driver is a balanced current source design. A current mode driver, generally  
speaking has a high output impedance (100 ohms) and supplies a constant current for a range of loads (a  
voltage mode driver on the other hand supplies a constant voltage for a range of loads). Current is switched  
through the load in one direction to produce a logic state and in the other direction to produce the other logic  
state. The output current is typically 9.330 mA. The current changes as a function of load resistor. The current  
mode requires (as discussed above) that a resistive termination be employed to terminate the signal and to  
complete the loop. Unterminated configurations are not allowed. The 9.33 mA loop current will develop a  
differential voltage of about 350mV across 37.5Ω (double terminated 75differential transmission backplane)  
effective resistance, which the receiver detects with a 280 mV minimum differential noise margin neglecting  
resistive line losses (driven signal minus receiver threshold (350 mV – 70 mV = 280 mV)). The signal is centered  
around +1.2V (Driver Offset, VOS) with respect to ground. Note that the steady-state voltage (VSS) peak-to-peak  
swing is twice the differential voltage (VOD) and is typically 700 mV.  
The current mode driver provides substantial benefits over voltage mode drivers, such as an RS-422 driver. Its  
quiescent current remains relatively flat versus switching frequency. Whereas the RS-422 voltage mode driver  
increases exponentially in most case between 20 MHz–50 MHz. This is due to the overlap current that flows  
between the rails of the device when the internal gates switch. Whereas the current mode driver switches a fixed  
current between its output without any substantial overlap current. This is similar to some ECL and PECL  
devices, but without the heavy static ICC requirements of the ECL/PECL designs. LVDS requires > 80% less  
current than similar PECL devices. AC specifications for the driver are a tenfold improvement over other existing  
RS-422 drivers.  
The TRI-STATE function allows the driver outputs to be disabled, thus obtaining an even lower power state when  
the transmission of data is not required.  
POWER DECOUPLING RECOMMENDATIONS  
Bypass capacitors must be used on power pins. High frequency ceramic (surface mount is recommended) 0.1µF  
in parallel with 0.01µF, in parallel with 0.001µF at the power supply pin as well as scattered capacitors over the  
printed circuit board. Multiple vias should be used to connect the decoupling capacitors to the power planes. A  
4.7µF (35V) or greater solid tantalum capacitor should be connected at the power entry point on the printed  
circuit board.  
PC BOARD CONSIDERATIONS  
Use at least 4 PCB layers (top to bottom); BLVDS signals, ground, power, TTL signals.  
Isolate TTL signals from BLVDS signals, otherwise the TTL may couple onto the BLVDS lines. It is best to put  
TTL and BLVDS signals on different layers which are isolated by a power/ground plane(s).  
Keep drivers and receivers as close to the (BLVDS port side) connectors as possible to create short stub  
lengths.  
Copyright © 1999–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
9
Product Folder Links: DS92CK16  
DS92CK16  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
www.ti.com  
DIFFERENTIAL TRACES  
Use controlled impedance traces which match the differential impedance of your transmission medium (ie.  
backplane or cable) and termination resistor(s). Run the differential pair trace lines as close together as possible  
as soon as they leave the IC . This will help eliminate reflections and ensure noise is coupled as common-mode.  
In fact, we have seen that differential signals which are 1mm apart radiate far less noise than traces 3mm apart  
since magnetic field cancellation is much better with the closer traces. Plus, noise induced on the differential  
lines is much more likely to appear as common-mode which is rejected by the receiver.  
Match electrical lengths between traces to reduce skew. Skew between the signals of a pair means a phase  
difference between signals which destroys the magnetic field cancellation benefits of differential signals and EMI  
will result. (Note the velocity of propagation, v = c/Er where c (the speed of light) = 0.2997mm/ps or 0.0118  
in/ps). Do not rely solely on the autoroute function for differential traces. Carefully review dimensions to match  
differential impedance and provide isolation for the differential lines. Minimize the number or vias and other  
discontinuities on the line.  
Avoid 90° turns (these cause impedance discontinuities). Use arcs or 45° bevels.  
Within a pair of traces, the distance between the two traces should be minimized to maintain common-mode  
rejection of the receivers. On the printed circuit board, this distance should remain constant to avoid  
discontinuities in differential impedance. Minor violations at connection points are allowable.  
STUB LENGTH  
Stub lengths should be kept to a minimum. The typical transition time of the DS92CK16 BLVDS output is 0.75ns  
(20% to 80%). The 100 percent time is 0.75/0.6 or 1.25ns. For a general approximation, if the electrical length of  
a trace is greater than 1/5 of the transition edge, then the trace is considered a transmission line. For example,  
1.25ns/5 is 250 picoseconds. Let velocity equal 160ps per inch for a typical loaded backplane. Then maximum  
stub length is 250ps/160ps/in or 1.56 inches. To determine the maximum stub for your backplane, you need to  
know the propagation velocity for the actual conditions (refer to application notes AN– 905(SNLA035) and  
AN–808(SNLA028)).  
TERMINATION  
Use a resistor which best matches the differential impedance of your loaded transmission line. Remember that  
the current mode outputs need the termination resistor to generate the differential voltage. BLVDS will not work  
without resistor termination.  
Surface mount 1% to 2% resistors are best.  
PROBING BLVDS TRANSMISSION LINES  
Always use high impedance (> 100k), low capacitance (< 2pF) scope probes with a wide bandwidth (1GHz)  
scope. Improper probing will give deceiving results.  
CABLES AND CONNECTORS, GENERAL COMMENTS  
Use controlled impedance media. The connectors you use should have a matched differential impedance of  
about Zo . They should not introduce major impedance discontinuities.  
Balanced cables (e.g. twisted pair) are usually better than unbalanced cables (ribbon cable, simple coax.) for  
noise reduction and signal quality. Balanced cables tend to generate less EMI due to field canceling effects and  
also tend to pick up electromagnetic radiation a common-mode (not differential mode) noise which is rejected by  
the receiver. For cable distances < 0.5M, most cables can be made to work effectively. For distances 0.5M d ≤  
10M, CAT 3 (category 3) twisted pair cable works well, is readily available and relatively inexpensive.  
10  
Submit Documentation Feedback  
Copyright © 1999–2013, Texas Instruments Incorporated  
Product Folder Links: DS92CK16  
 
DS92CK16  
www.ti.com  
SNAS044C NOVEMBER 1999REVISED APRIL 2013  
REVISION HISTORY  
Changes from Revision B (April 2013) to Revision C  
Page  
Changed layout of National Data Sheet to TI format .......................................................................................................... 10  
Copyright © 1999–2013, Texas Instruments Incorporated  
Submit Documentation Feedback  
11  
Product Folder Links: DS92CK16  
PACKAGE OPTION ADDENDUM  
www.ti.com  
30-Sep-2021  
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)  
DS92CK16TMTC  
ACTIVE  
TSSOP  
TSSOP  
TSSOP  
PW  
24  
24  
24  
61  
Non-RoHS  
& Green  
Call TI  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
-40 to 85  
-40 to 85  
-40 to 85  
DS92CK16T  
MTC  
DS92CK16TMTC/NOPB  
DS92CK16TMTCX/NOPB  
ACTIVE  
ACTIVE  
PW  
61  
RoHS & Green  
SN  
SN  
DS92CK16T  
MTC  
PW  
2500 RoHS & Green  
DS92CK16T  
MTC  
(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.  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
30-Sep-2021  
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 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
5-Jan-2022  
TAPE AND REEL INFORMATION  
*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)  
DS92CK16TMTCX/NOPB TSSOP  
PW  
24  
2500  
330.0  
16.4  
6.95  
8.3  
1.6  
8.0  
16.0  
Q1  
Pack Materials-Page 1  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
5-Jan-2022  
*All dimensions are nominal  
Device  
Package Type Package Drawing Pins  
TSSOP PW 24  
SPQ  
Length (mm) Width (mm) Height (mm)  
367.0 367.0 35.0  
DS92CK16TMTCX/NOPB  
2500  
Pack Materials-Page 2  
PACKAGE MATERIALS INFORMATION  
www.ti.com  
5-Jan-2022  
TUBE  
*All dimensions are nominal  
Device  
Package Name Package Type  
Pins  
SPQ  
L (mm)  
W (mm)  
T (µm)  
B (mm)  
DS92CK16TMTC  
DS92CK16TMTC  
PW  
PW  
PW  
TSSOP  
TSSOP  
TSSOP  
24  
24  
24  
61  
61  
61  
495  
495  
495  
8
8
8
2514.6  
2514.6  
2514.6  
4.06  
4.06  
4.06  
DS92CK16TMTC/NOPB  
Pack Materials-Page 3  
PACKAGE OUTLINE  
PW0024A  
TSSOP - 1.2 mm max height  
S
C
A
L
E
2
.
0
0
0
SMALL OUTLINE PACKAGE  
SEATING  
PLANE  
C
6.6  
6.2  
TYP  
A
0.1 C  
PIN 1 INDEX AREA  
22X 0.65  
24  
1
2X  
7.15  
7.9  
7.7  
NOTE 3  
12  
B
13  
0.30  
24X  
4.5  
4.3  
NOTE 4  
0.19  
1.2 MAX  
0.1  
C A B  
0.25  
GAGE PLANE  
0.15  
0.05  
(0.15) TYP  
SEE DETAIL A  
0.75  
0.50  
0 -8  
A
20  
DETAIL A  
TYPICAL  
4220208/A 02/2017  
NOTES:  
1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing  
per ASME Y14.5M.  
2. This drawing is subject to change without notice.  
3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not  
exceed 0.15 mm per side.  
4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.25 mm per side.  
5. Reference JEDEC registration MO-153.  
www.ti.com  
EXAMPLE BOARD LAYOUT  
PW0024A  
TSSOP - 1.2 mm max height  
SMALL OUTLINE PACKAGE  
SYMM  
24X (1.5)  
(R0.05) TYP  
24  
1
24X (0.45)  
22X (0.65)  
SYMM  
12  
13  
(5.8)  
LAND PATTERN EXAMPLE  
EXPOSED METAL SHOWN  
SCALE: 10X  
SOLDER MASK  
OPENING  
METAL UNDER  
SOLDER MASK  
SOLDER MASK  
OPENING  
METAL  
EXPOSED METAL  
EXPOSED METAL  
0.05 MAX  
ALL AROUND  
0.05 MIN  
ALL AROUND  
NON-SOLDER MASK  
DEFINED  
SOLDER MASK  
DEFINED  
15.000  
(PREFERRED)  
SOLDER MASK DETAILS  
4220208/A 02/2017  
NOTES: (continued)  
6. Publication IPC-7351 may have alternate designs.  
7. Solder mask tolerances between and around signal pads can vary based on board fabrication site.  
www.ti.com  
EXAMPLE STENCIL DESIGN  
PW0024A  
TSSOP - 1.2 mm max height  
SMALL OUTLINE PACKAGE  
24X (1.5)  
SYMM  
(R0.05) TYP  
24  
1
24X (0.45)  
22X (0.65)  
SYMM  
12  
13  
(5.8)  
SOLDER PASTE EXAMPLE  
BASED ON 0.125 mm THICK STENCIL  
SCALE: 10X  
4220208/A 02/2017  
NOTES: (continued)  
8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate  
design recommendations.  
9. Board assembly site may have different recommendations for stencil design.  
www.ti.com  
IMPORTANT NOTICE AND DISCLAIMER  
TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE  
DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”  
AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY  
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD  
PARTY INTELLECTUAL PROPERTY RIGHTS.  
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate  
TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable  
standards, and any other safety, security, regulatory or other requirements.  
These resources are subject to change without notice. TI grants you permission to use these resources only for development of an  
application that uses the TI products described in the resource. Other reproduction and display of these resources is prohibited. No license  
is granted to any other TI intellectual property right or to any third party intellectual property right. TI disclaims responsibility for, and you  
will fully indemnify TI and its representatives against, any claims, damages, costs, losses, and liabilities arising out of your use of these  
resources.  
TI’s products are provided subject to TI’s Terms of Sale or other applicable terms available either on ti.com or provided in conjunction with  
such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for  
TI products.  
TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE  
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265  
Copyright © 2022, Texas Instruments Incorporated  

相关型号:

DS92CK16MDC

暂无描述
NSC

DS92CK16MWC

IC LINE TRANSCEIVER, UUC, WAFER, Line Driver or Receiver
NSC

DS92CK16TMTC

3V BLVDS 1 to 6 Clock Buffer/Bus Transceiver
NSC

DS92CK16TMTC

DS92CK16 3V BLVDS 1 to 6 Clock Buffer/Bus Transceiver
MACOM

DS92CK16TMTC

3V BLVDS 1:6 时钟缓冲器/总线收发器 | PW | 24 | -40 to 85
TI

DS92CK16TMTC/NOPB

IC LINE TRANSCEIVER, PDSO24, TSSOP-24, Line Driver or Receiver
NSC

DS92CK16TMTC/NOPB

3V BLVDS 1:6 时钟缓冲器/总线收发器 | PW | 24 | -40 to 85
TI

DS92CK16TMTCNOPB

DS92CK16 3V BLVDS 1 to 6 Clock Buffer/Bus Transceiver
MACOM

DS92CK16TMTCX

Six Distributed-Output Clock Driver
NSC

DS92CK16TMTCX

DS92CK16 3V BLVDS 1 to 6 Clock Buffer/Bus Transceiver
MACOM

DS92CK16TMTCX/NOPB

IC LINE TRANSCEIVER, PDSO24, TSSOP-24, Line Driver or Receiver
NSC

DS92CK16TMTCX/NOPB

3V BLVDS 1:6 时钟缓冲器/总线收发器 | PW | 24 | -40 to 85
TI