SCDS117C − JANUARY 2003 − REVISED OCTOBER 2003
D Member of the Texas Instruments
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
Widebus Family
Undershoot Protection for Off-Isolation on
A and B Ports Up To −2 V
B-Port Outputs Are Precharged by Bias
Voltage (BIASV) to Minimize Signal
Distortion During Live Insertion and
Hot-Plugging
Supports PCI Hot Plug
Bidirectional Data Flow, With Near-Zero
Propagation Delay
Low ON-State Resistance (ron)
Characteristics (ron = 3 Ω Typical)
Low Input/Output Capacitance Minimizes
Loading and Signal Distortion
(Cio(OFF) = 5.5 pF Typical)
Data and Control Inputs Provide
Undershoot Clamp Diodes
Low Power Consumption
(ICC = 3 µA Max)
VCC Operating Range From 4 V to 5.5 V
Data I/Os Support 0 to 5-V Signaling Levels
(0.8-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, 5-V)
Control Inputs Can Be Driven by TTL or
5-V/3.3-V CMOS Outputs
Ioff Supports Partial-Power-Down Mode
Operation
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Performance Tested Per JESD 22
− 2000-V Human-Body Model
(A114-B, Class II)
− 1000-V Charged-Device Model (C101)
Supports Both Digital and Analog
Applications: PCI Interface, Memory
Interleaving, Bus Isolation, Low-Distortion
Signal Gating
BIASV
1A1
1A2
1A3
1A4
1A5
1A6
GND
1A7
1A8
1A9
1A10
2A1
2A2
VCC
2A3
GND
2A4
2A5
2A6
2A7
2A8
2A9
2A10
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12
37
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
1OE
2OE
1B1
1B2
1B3
1B4
1B5
GND
1B6
1B7
1B8
1B9
1B10
2B1
2B2
2B3
GND
2B4
2B5
2B6
2B7
2B8
2B9
2B10
description/ordering information
The SN74CBT16800C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron),
allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the
SN74CBT16800C provides protection for undershoot up to −2 V by sensing an undershoot event and ensuring
that the switch remains in the proper OFF state. The device also precharges the B port to a user-selectable bias
voltage (BIASV) to minimize live-insertion noise.
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.
Widebus is a trademark of Texas Instruments.
Copyright 2003, Texas Instruments Incorporated
!"#$% ! & '("") % $& ! *(+, '$% ! -$%).
"!-('%& '! !"# %! &*)' '$% ! & *)" %/) %)"#& ! )0$& &%"(#) %&
&%$ -$"- 1$""$ %2. "!-('% ! *"!')&& 3 -!)& !% )')&&$" ,2 ',(-)
%)&% 3 ! $,, *$"$#)%)"&.
POST OFFICE BOX 655303
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1
SCDS117C − JANUARY 2003 − REVISED OCTOBER 2003
description/ordering information (continued)
The SN74CBT16800C is organized as two 10-bit bus switches with separate output-enable (1OE, 2OE) inputs.
It can be used as two 10-bit bus switches or as one 20-bit bus switch. When OE is low, the associated 10-bit
bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When
OE is high, the associated 10-bit bus switch is OFF, and a high-impedance state exists between the A and B
ports. The B port is precharged to BIASV through the equivalent of a 10-kΩ resistor when OE is high, or if the
device is powered down (VCC = 0 V).
During insertion (or removal) of a card into (or from) an active bus, the card’s output voltage may be close to
GND. When the connector pins make contact, the card’s parasitic capacitance tries to force the bus signal to
GND, creating a possible glitch on the active bus. This glitching effect can be reduced by using a bus switch
with precharged bias voltage (BIASV) of the bus switch equal to the input threshold voltage level of the receivers
on the active bus. This method will ensure that any glitch produced by insertion (or removal) of the card will not
cross the input threshold region of the receivers on the active bus, minimizing the effects of live-insertion noise.
This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that
damaging current will not backflow through the device when it is powered down. The device has isolation during
power off.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
SSOP − DL
−40°C
−40
C to 85
85°C
C
ORDERABLE
PART NUMBER
PACKAGE†
TA
TSSOP − DGG
Tube
SN74CBT16800CDL
Tape and reel
SN74CBT16800CDLR
Tube
SN74CBT16800CDGG
Tape and reel
SN74CBT16800CDGGR
TOP-SIDE
MARKING
CBT16800C
CBT16800C
TVSOP − DGV
Tape and reel
SN74CBT16800CDGVR
CY800C
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
FUNCTION TABLE
(each 10-bit bus switch)
2
INPUT
OE
INPUT/OUTPUT
A
FUNCTION
L
B
A port = B port
H
Z
Disconnect
B port = BIASV
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• DALLAS, TEXAS 75265
SCDS117C − JANUARY 2003 − REVISED OCTOBER 2003
logic diagram (positive logic)
1
1A1
1A10
46
2
SW
12
36
SW
BIASV
1B1
1B10
48
1OE
35
13
SW
2A1
2A10
24
2B1
25
SW
2B10
47
2OE
simplified schematic, each FET switch (SW)
A
B
Undershoot
Protection Circuit
EN†
† EN is the internal enable signal applied to the switch.
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3
SCDS117C − JANUARY 2003 − REVISED OCTOBER 2003
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Bias supply voltage range, BIASV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Control input voltage range, VIN (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Switch I/O voltage range, VI/O (see Notes 1, 2, and 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Control input clamp current, IIK (VIN < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA
I/O port clamp current, II/OK (VI/O < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA
ON-state switch current, II/O (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±128 mA
Continuous current through VCC or GND terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
Package thermal impedance, θJA (see Note 5): DGG package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W
DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
DL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltages are with respect to ground unless otherwise specified.
2. The input and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
3. VI and VO are used to denote specific conditions for VI/O.
4. II and IO are used to denote specific conditions for II/O.
5. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 6)
MIN
MAX
VCC
BIASV
Supply voltage
4
5.5
V
Bias supply voltage
0
V
VIH
VIL
High-level control input voltage
2
VCC
5.5
Low-level control input voltage
0
0.8
V
VI/O
TA
Data input/output voltage
0
5.5
V
−40
85
°C
Operating free-air temperature
UNIT
V
NOTE 6: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004. BIASV is a supply voltage, not a control input.
4
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• DALLAS, TEXAS 75265
SCDS117C − JANUARY 2003 − REVISED OCTOBER 2003
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VIK
Control inputs
VCC = 4.5 V,
VIKU
Data inputs
VCC = 5 V,
VO(USP)‡
IIN = −18 mA
0 mA > II ≥ −50 mA,
VIN = VCC or GND,
MIN
Switch OFF
VCC = BIASV = 5 V,
II = −10 mA,
VIN = VCC or GND,
Switch OFF
B port
VCC = 0 V,
BIASV = Vx,
IO = 0
IIN
Control inputs
VCC = 5.5 V,
VIN = VCC or GND
BIASV = 2.4 V,
VO = 0,
Switch OFF,
VIN = VCC or GND
VO = 0 to 5.5 V,
VI = 0,
Switch OFF,
VIN = VCC or GND
VO = 0 to 5.5 V,
II/O = 0,
VIN = VCC or GND,
VI = 0
Other inputs at VCC or GND
B port
VCC = 4.5 V,
IOZ§
VCC = 5.5 V,
Ioff
VCC = 0,
ICC
VCC = 5.5 V,
∆ICC¶
Cin
Control inputs
VCC = 5.5 V,
VIN = 3 V or 0
One input at 3.4 V,
Control inputs
Cio(OFF)
A port
VI/O = 3 V or 0,
Switch OFF,
VI/O = 3 V or 0,
VCC = 4 V,
TYP at VCC = 4 V
Cio(ON)
ron#
VCC = 4.5 V
MAX
UNIT
−1.8
V
−2
V
3
VO
IO
TYP†
V
Vx−0.1
Vx
V
±1
µA
0.25
mA
±10
µA
10
µA
3
µA
2.5
mA
Switch ON or OFF
4.5
pF
VIN = VCC or GND
5.5
pF
Switch ON,
VIN = VCC or GND
15.5
pF
VI = 2.4 V,
IO = −15 mA
8
12
IO = 64 mA
IO = 30 mA
3
6
VI = 0
3
6
Ω
VI = 2.4 V,
IO = −15 mA
5
10
VIN and IIN refer to control inputs. VI, VO, II, and IO refer to data pins.
† All typical values are at VCC = 5 V (unless otherwise noted), TA = 25°C.
‡ VO(USP) = A-port undershoot static protection.
§ For I/O ports, the parameter IOZ includes the input leakage current.
¶ This is the increase in supply current for each input that is at the specified voltage level, rather than VCC or GND.
# Measured by the voltage drop between the A and B terminals at the indicated current through the switch. ON-state resistance is determined by
the lower of the voltages of the two (A or B) terminals.
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 1)
PARAMETER
TEST
CONDITIONS
tpd||
tPZH
BIASV = GND
tPZL
BIASV = 3 V
tPHZ
BIASV = GND
tPLZ
BIASV = 3 V
FROM
(INPUT)
TO
(OUTPUT)
A or B
B or A
OE
A or B
OE
A or B
VCC = 4 V
VCC = 5 V
± 0.5 V
MIN
MIN
MAX
0.24
UNIT
MAX
0.15
6.5
1.5
6
6.5
1.5
6
6.5
1.5
6
6.5
1.5
6
ns
ns
ns
|| The propagation delay is the calculated RC time constant of the typical ON-state resistance of the switch and the specified load capacitance,
when driven by an ideal voltage source (zero output impedance).
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
SCDS117C − JANUARY 2003 − REVISED OCTOBER 2003
PARAMETER MEASUREMENT INFORMATION
VCC
Input Generator
VIN
50 Ω
50 Ω
VG1
TEST CIRCUIT
DUT
7V
Input Generator
VI
S1
RL
VO
GND
50 Ω
50 Ω
VG2
CL
(see Note A)
RL
TEST
VCC
S1
RL
VI
CL
tpd(s)
5 V ± 0.5 V
4V
Open
Open
500 Ω
500 Ω
VCC or GND
VCC or GND
50 pF
50 pF
tPLZ/tPZL
5 V ± 0.5 V
4V
7V
7V
500 Ω
500 Ω
GND
GND
50 pF
50 pF
0.3 V
0.3 V
tPHZ/tPZH
5 V ± 0.5 V
4V
Open
Open
500 Ω
500 Ω
VCC
VCC
50 pF
50 pF
0.3 V
0.3 V
Output
Control
(VIN)
V∆
3V
1.5 V
3V
1.5 V
1.5 V
0V
tPLH
VOH
Output
1.5 V
Output
Waveform 1
S1 at 7 V
(see Note B)
tPLZ
3.5 V
1.5 V
tPZH
tPHL
1.5 V
VOL
Output
Waveform 2
S1 at Open
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES (tpd(s))
1.5 V
0V
tPZL
Output
Control
(VIN)
Open
VOL + V∆
VOL
tPHZ
1.5 V
VOH − V∆
VOH
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd(s). The tpd propagation delay is the calculated RC time constant of the typical ON-state
resistance of the switch and the specified load capacitance, when driven by an ideal voltage source (zero output impedance).
H. All parameters and waveforms are not applicable to all devices.
Figure 1. Test Circuit and Voltage Waveforms
6
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PACKAGE OPTION ADDENDUM
www.ti.com
1-Aug-2011
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package
Drawing
Pins
Package Qty
Eco Plan
(2)
Lead/
Ball Finish
MSL Peak Temp
(3)
Samples
(Requires Login)
74CBT16800CDGGRE4
ACTIVE
TSSOP
DGG
48
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
74CBT16800CDGGRG4
ACTIVE
TSSOP
DGG
48
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
74CBT16800CDGVRE4
ACTIVE
TVSOP
DGV
48
TBD
Call TI
Call TI
74CBT16800CDGVRG4
ACTIVE
TVSOP
DGV
48
TBD
Call TI
Call TI
SN74CBT16800CDGGR
ACTIVE
TSSOP
DGG
48
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
SN74CBT16800CDL
ACTIVE
SSOP
DL
48
25
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
SN74CBT16800CDLG4
ACTIVE
SSOP
DL
48
25
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
SN74CBT16800CDLR
ACTIVE
SSOP
DL
48
1000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
SN74CBT16800CDLRG4
ACTIVE
SSOP
DL
48
1000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM
(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)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
1-Aug-2011
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 2
PACKAGE MATERIALS INFORMATION
www.ti.com
29-Jul-2011
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
SN74CBT16800CDGGR
TSSOP
DGG
48
2000
330.0
24.4
8.6
15.8
1.8
12.0
24.0
Q1
SN74CBT16800CDLR
SSOP
DL
48
1000
330.0
32.4
11.35
16.2
3.1
16.0
32.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
29-Jul-2011
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
SN74CBT16800CDGGR
TSSOP
DGG
48
2000
346.0
346.0
41.0
SN74CBT16800CDLR
SSOP
DL
48
1000
346.0
346.0
49.0
Pack Materials-Page 2
MECHANICAL DATA
MSSO001C – JANUARY 1995 – REVISED DECEMBER 2001
DL (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
48 PINS SHOWN
0.025 (0,635)
0.0135 (0,343)
0.008 (0,203)
48
0.005 (0,13) M
25
0.010 (0,25)
0.005 (0,13)
0.299 (7,59)
0.291 (7,39)
0.420 (10,67)
0.395 (10,03)
Gage Plane
0.010 (0,25)
1
0°–ā8°
24
0.040 (1,02)
A
0.020 (0,51)
Seating Plane
0.110 (2,79) MAX
0.004 (0,10)
0.008 (0,20) MIN
PINS **
28
48
56
A MAX
0.380
(9,65)
0.630
(16,00)
0.730
(18,54)
A MIN
0.370
(9,40)
0.620
(15,75)
0.720
(18,29)
DIM
4040048 / E 12/01
NOTES: A.
B.
C.
D.
All linear dimensions are in inches (millimeters).
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion not to exceed 0.006 (0,15).
Falls within JEDEC MO-118
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MECHANICAL DATA
MTSS003D – JANUARY 1995 – REVISED JANUARY 1998
DGG (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
48 PINS SHOWN
0,27
0,17
0,50
48
0,08 M
25
6,20
6,00
8,30
7,90
0,15 NOM
Gage Plane
1
0,25
24
0°– 8°
A
0,75
0,50
Seating Plane
0,15
0,05
1,20 MAX
PINS **
0,10
48
56
64
A MAX
12,60
14,10
17,10
A MIN
12,40
13,90
16,90
DIM
4040078 / F 12/97
NOTES: A.
B.
C.
D.
All linear dimensions are in millimeters.
This drawing is subject to change without notice.
Body dimensions do not include mold protrusion not to exceed 0,15.
Falls within JEDEC MO-153
POST OFFICE BOX 655303
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IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
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power.ti.com
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microcontroller.ti.com
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