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SN75LBC777 SINGLE CHIP GEOPORTTM/AppleTalkTM TRANSCEIVER
SLLS227 - SEPTEMBER 1996
D D D D D D D D
Single-Chip Interface Solution for the 9-Pin GeoPortTM Peripheral Data CircuitTerminating Equipment (DCE) for the Intelligent Network Port Designed to Operate up to 4-Mbits/s Full Duplex Single 5-V Supply Operation 10-kV ESD Protection on Bus Terminals Backward Compatible with AppleTalkTM and LocalTalkTM LANs Combines Multiple Components into a Single Chip Solution Complements the SN75LBC776 9-Terminal GeoPort Host Data Terminal Equipment (DTE) Interface Device LinBiCMOSTM Process Technology
DW PACKAGE (TOP VIEW)
DA1 VEE C- C+ SHDN DZ2 DY2 GND DEN DA2
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
GND VCC DY1 DY3 DA3 RB2 RY2 RB1 RA1 RY1
logic diagram (positive logic)
description
The SN75LBC777 is a low-power LinBiCMOS device that incorporate the drivers and receivers for a 9-pin GeoPort peripheral interface. GeoPort combines hybrid EIA/TIA-422-B and EIA/ TIA-423-B drivers and receivers to transmit data up to four-Mbit/s full duplex. GeoPort is a serial communications standard that is intended to replace the RS-232, AppleTalk, and printer ports all in one connector in addition to providing real-time data transfer capability. The SN75LBC777 provides point-to-point connections between GeoPort-compatible devices with data transmission rates up to 4-Mbit/s full duplex over a 4-foot cable. Applications include connection to telephone, integrated services digital network (ISDN), digital sound and imaging, fax-data modems, and other traditional serial and parallel connections. The GeoPort is backwardly compatible to both LocalTalk and AppleTalk LANs. While the SN75LBC777 is powered off (VCC = 0) the outputs are in a high-impedance state. When the shutdown (SHDN) terminal is high, the charge pump is powered down and the outputs are in a high-impedance state. When high, the driver enable (DEN) terminal puts the outputs of the differential driver into a high-impedance state.
DA2 DEN 10 9 7 6 DY2 DZ2
12 RY1 11 13
RA1 RB1
DA1
1
18
DY1
DA3
16
17
DY3
RY2
14
15
RB2
SHDN
5
VCC GND
19 8 Charge Pump 2 VEE
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. GeoPort, LocalTalk, and AppleTalk are trademarks of Apple Computer, Incorporated. LinBiCMOS is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright (c) 1996, Texas Instruments Incorporated
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SN75LBC777 SINGLE CHIP GEOPORTTM/AppleTalkTM TRANSCEIVER
SLLS227 - SEPTEMBER 1996
description (continued)
A switched-capacitor voltage converter generates the negative voltage required from a single 5-V supply using two 0.33-F capacitors. One capacitor is between the C+ and C- terminals and the other is between VEE and ground. The SN75LBC777 is characterized for operation over the 0C to 70C temperature range.
DRIVER FUNCTION TABLE INPUTS DA1 H L X X OPEN X X X DA2 X X H L OPEN X X X DA3 H L X X OPEN X X X ENABLE SHDN L L L L L H X OPEN DEN X X L L L X H OPEN DY1 L H X X L Z X Z OUTPUTS DY2 X X H L H Z Z Z DZ2 X X L H L Z Z Z DY3 H L X X H Z X Z
H = high level, L= low level, X = irrelevant, ? = indeterminate, Z = high impedance (off) RECEIVER FUNCTION TABLE INPUTS RA1 H L RB1 L H RB2 H L OPEN SHORT X ENABLE SHDN L L L L H OUTPUTS RY1 H L H ? Z RY2 L H H ? Z
OPEN SHORT X X
X X X OPEN Z Z -0.2 V < VID < 0.2 V H = high level, L= low level, X = irrelevant, ? = indeterminate, Z = high impedance (off)
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SN75LBC777 SINGLE CHIP GEOPORTTM/AppleTalkTM TRANSCEIVER
SLLS227 - SEPTEMBER 1996
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Positive supply voltage range, VCC, (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 to 7 V Negative supply voltage range, VEE, (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 7 to 0.5 V Receiver input voltage range (RA1, RB1, RB2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 15 V to 15 V Receiver differential input voltage range, VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 12 V to 12 V Receiver output voltage range (RY1, RY2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 V to 5.5 V Driver output voltage range (Power Off)(DY1, DY2, DZ2, DY3) . . . . . . . . . . . . . . . . . . . . . . . . . . . - 15 V to 15 V Driver output voltage range (Power On)(DY1, DY2, DZ2, DY3) . . . . . . . . . . . . . . . . . . . . . . . . . . . - 11 V to 11 V Driver input voltage range (DA, SHDN, DEN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 V to VCC +0.4 V Electrostatic discharge (see Note 2) Bus Pins (Class 3 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 kV Bus Pins (Class 3 B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 V All Pins (Class 3, A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV All Pins (Class 3 B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 V Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150 C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260C
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 values are with respect to the network ground terminal unless otherwise noted. 2. This rating is measured using MIL-STD-883C Method, 3015.7. DISSIPATION RATING TABLE PACKAGE DW TA 25C POWER RATING 1125 mW DERATE FACTOR ABOVE TA = 25C 9.0C TA = 70C POWER RATING 720 mW
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SN75LBC777 SINGLE CHIP GEOPORTTM/AppleTalkTM TRANSCEIVER
SLLS227 - SEPTEMBER 1996
recommended operating conditions
MIN Supply voltage, VCC High-level input voltage, VIH Low-level input voltage, VIL (DA, SHDN, DEN) (DA, SHDN, DEN) -7 -12 0.33 0 0.2 70 4.75 2 NOM 5 MAX 5.25 5.25 0.8 7 12 UNIT V V V V V F C
Receiver common-mode input voltage, VIC Receiver differential input voltage, VID Voltage converter filter capacitance Voltage converter filter capacitor equivalent series resistance (ESR) Operating free-air temperature, TA
driver electrical characteristics over operating free-air temperature range (unless otherwise noted)
PARAMETER VOH VOL |VOD| |VOD| VOC |VOC(SS)| |VOC(PP)| ICC IOZ IOS High-level High level output voltage Single ended, g , See Figure 1 Low-level Low level output voltage Magnitude of differential output voltage |VDY - VDZ| Change in differential voltage magnitude Common-mode output voltage Magnitude of change, common-mode steadystate output voltage Magnitude of change, common-mode peak-to-peak output voltage Supply current High-impedance output current Short-circuit output current SHDN = DEN = 0 V, SHDN = DEN = 5 V, VCC = 0 or 5 V, VCC = 5.25 V, See Note 3 No Load No Load -10 VO 10 V - 5 V VO 5 V, 170 See Figure 3 700 7 15 100 100 450 -1 TEST CONDITIONS RL= 12 k RL= 120 RL= 12 k RL = 120 , RL = 120 , See Figure 2 g 4 250 3 200 MIN 3.6 2 TYP 4.5 3.6 - 4.5 - 2.7 -3.6 - 1.8 MAX UNIT V V V V V mV V mV mV mA A A mA
NOTE 3: Not more than one output should be shorted at one time.
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SLLS227 - SEPTEMBER 1996
driver switching characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER tPHL tPLH tPZL tPZH tPLZ tPHZ tr tf tPHL tPLH tPZL tPZH tPLZ tPHZ tr tf tSK(P) Propagation delay time, high-to-low level output Propagation delay time, low-to-high level output Driver output enable time to low-level output Driver output enable time to high-level output Driver output disable time from low-level output Driver output disable time from high-level output Rise time Fall time Propagation delay time, high-to-low level output Propagation delay time, low-to-high level output Driver output enable time to low-level output low level Driver output enable time to high-level output high level Driver output disable time from low-level output low level Driver output disable time from high-level output high level Rise time Fall time Pulse skew, |tPLH - tPHL| SHDN DEN SHDN DEN SHDN DEN SHDN DEN 10 10 Differential, RL = 120 , See Figure 5 SHDN SHDN SHDN SHDN 10 10 Single-ended, RL = 120 , See Figure 4 TEST CONDITIONS MIN TYP 40 40 25 25 30 30 25 25 40 40 25 35 25 35 30 30 35 35 25 25 MAX 75 75 100 100 100 100 75 75 75 75 100 100 100 150 100 100 100 100 75 75 22 UNIT ns ns s s ns ns ns ns ns ns s ns s ns ns ns ns ns ns ns ns
receiver electrical characteristics over free-air temperature range (unless otherwise noted)
PARAMETER VIT+ VIT- Vhys VOH VOL IOS RI Positive-going input threshold voltage Negative-going input threshold voltage Differential input voltage hysteresis (VIT+ - VIT-) High-level output voltage (see Note 4) Low-level output voltage Short-circuit Short circuit output current Input resistance IOH = 2 mA, IOL = -2 mA, VO = 0 VO = 5.25 V VCC = 0 or 5.25 V, -12 V VI 12 V VIC = 0 VIC = 0 2 -85 6 -200 50 4.9 0.2 - 45 45 30 85 0.8 TEST CONDITIONS MIN TYP MAX 200 UNIT mV mV mV V V mA mA k
NOTE 4: If the inputs are left unconnected, RA1 interprets this as a high-level input and RB1 and RB2 interpret this as a low-level input so that all outputs are at the high level.
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5
SN75LBC777 SINGLE CHIP GEOPORTTM/AppleTalkTM TRANSCEIVER
SLLS227 - SEPTEMBER 1996
receiver switching characteristics over free-air temperature range (unless otherwise noted)
PARAMETER tPHL tPLH tr tf tsk(p) tPZL tPZH tPLZ tPHZ tPZL tPZH tPLZ tPHZ Propagation delay time, high-to-low level output Propagation delay time, low-to-high level output Rise time Fall time Pulse skew |tPLH-tPHL| Receiver output enable time to low-level output Receiver output enable time to high-level output Receiver output disable time from low-level output Receiver output disable time from high-level output Receiver output enable time to low-level output Receiver output enable time to high-level output Receiver output disable time from low-level output Receiver output disable time from high-level output Single-ended, g , See Figure 7 CL = 50 pF, , Differential, See Figure 7 CL = 50 pF, 35 35 21 21 12 12 25 125 RL = 2 k, k See Figure 6 CL = 15 pF, F TEST CONDITIONS MIN TYP 30 30 15 15 MAX 75 75 30 30 20 100 100 100 100 25 25 100 400 UNIT ns ns ns ns ns ns ns ns ns s s ns ns
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SN75LBC777 SINGLE CHIP GEOPORTTM/AppleTalkTM TRANSCEIVER
SLLS227 - SEPTEMBER 1996
PARAMETER MEASUREMENT INFORMATION
CL CL II DA1 VI SHDN DEN or SHDN TEST CIRCUIT NOTES: A. CL = 50 pF B. Driver 3 is a noninverting version of driver 1. VO DY1 IO RL DA2 VI DZ2 IO VO RL II DY2 VO CL IO RL
Figure 1. Single-Ended Driver DC Parameter Test Circuits
DY2 VOD VI DZ2 60 50 pF 60
II DA2
IO
DEN or SHDN TEST CIRCUIT
Figure 2. Differential Driver DC Parameter Test Circuit
DY2 DA2 VI DZ2 VOD 60 VOC 15 pF 60
DEN or SHDN TEST CIRCUIT (see Note A)
3V VI 1.5 V 1.5 V 0V
VOC
0V V VOC(PP) OC(SS)
VOLTAGE WAVEFORM NOTE A. Measured 3dB Bandwidth = 300 MHz
Figure 3. Differential Driver Common-Mode Output Voltage Test Circuit and Waveform
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SN75LBC777 SINGLE CHIP GEOPORTTM/AppleTalkTM TRANSCEIVER
SLLS227 - SEPTEMBER 1996
PARAMETER MEASUREMENT INFORMATION
CL CL DA1 VO SHDN SHDN or DEN TEST CIRCUIT (see Note A) DY1 RL II DA2 VI DZ2 IO VO RL IO DY2 VO CL RL
SHDN or DEN
3V 1.5 V 1.5 V 1.5 V 1.5 V 0V 3V
DA
1.5 V
1.5 V 0V tPLH
tPHL DY1, DZ2 90% 10% tPZH tf
tPLZ
tPZL 90% 90% 10% 50% 10% tr
tPHZ 90% VOH 0V VOL tPLZ tPHL
50% 10%
tPLH
tPHZ tPZH
DY2 90% 50% 10% tr
90%
90%
10%
90% 50% 10% tf 10%
VOH 0V VOL
tPZL
VOLTAGE WAVEFORM (see Note B) NOTES: A. CL = 50 pF, RL = 120 B. The input waveform tr, tf 10 ns. C. Driver 3 is a noninverting version of driver 1.
Figure 4. Single-Ended Driver Propagation and Transition Times Test Circuits and Waveform
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SLLS227 - SEPTEMBER 1996
PARAMETER MEASUREMENT INFORMATION
DY2 DA2 VI SHDN or DEN TEST CIRCUIT SHDN or DEN 3V 1.5 V 1.5 V 1.5 V 1.5 V 0V 3V DA 1.5 V 1.5 V 0V tPHL tPLH tPHZ 90% 90% VOD tPZL tr VOLTAGE WAVEFORM NOTE A: For the input waveform tr, tf < = 10 ns tf 50% 10% 90% 10% tPZH 90% 50% 10% 10% tPLZ VOD(H) 0V VOD(L) DZ2 VOD RL = 60 50 pF RL = 60
Figure 5. Differential Driver Propagation and Transition Times Test Circuit and Waveforms
VCC II Input VI 2 k RA + RB _ RY 15 pF SHDN TEST CIRCUIT NOTE A: For the input waveform tr, tf < = 10 ns IO Output VO VO VI tPLH 0V tPHL 90% 10% tr tf VOLTAGE WAVEFORM 90% VOH 1.5 V 10% V OL 0V - 2.5 V 2.5 V
Figure 6. Receiver Propagation and Transition Times Test Circuit and Waveform
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SLLS227 - SEPTEMBER 1996
PARAMETER MEASUREMENT INFORMATION
VCC - 2.5 V or 2.5 V RA + RB _ RY RL = 500 S1 CL = 50 pF SHDN TEST CIRCUIT 3V SHDN tPLZ S1 at VCC 10% VO tPHZ 90% S1 at GND 10% tPZH VOH 0V 1.5 V tPZL VCC 90% VOL 1.5 V 0V
VOLTAGE WAVEFORM NOTE A: For the input waveform tr, tf < = 10 ns
Figure 7. Receiver Enable and Disable Test Circuit and Waveforms
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SLLS227 - SEPTEMBER 1996
APPLICATION INFORMATION
GeoPort Host SN75LBC776 9-Terminal DTE 13 12 7 6 18 15 RxD- RxD + TxD + TxD - GND RESET/ATT SCLK 6 7 12 13 15 18 19 17 GeoPort Peripheral Device SN75LBC777 9-Terminal DCE
RESET/ATT
10 11 5 14
RxD TxD SHDN DTR RTXC CTS RTS
GeoPort Control Logic
Power 16 TxHS/Wake-Up
1 SCLK 16 TxHS/WAKE-UP 9
DEN
VCC
Standard 19 Peripheral SN75LBC777 9-Terminal DCE 4 3
6 7
RxD - RxD +
17 TxHS/WAKE-UP 12 13 TxD + TxD - 3 6 4 1 7 9 2 8 5 Power VCC
0.33 F
+
-5 V 0.33 F
VEE +
2 8 20 15 18 RESET/ATT SCLK
GND
NOTE A: A potential charge pump capacitor is the AVX 0805YC334MATXA or an equivalent.
Figure 8. GeoPort 9-terminal DCE Connection Application
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SN75LBC777 SINGLE CHIP GEOPORTTM/AppleTalkTM TRANSCEIVER
SLLS227 - SEPTEMBER 1996
generator characteristics
PARAMETER TEST CONDITIONS Open circuit |VO| IOS RO(OFF) IO(OFF) SR tt Output voltage magnitude Short-circuit output current Power-off source resistance Power-off output current Output voltage slew rate 3.3 V to 3.3 V Output transition time 3 V to 3 V 10% to 90% VO(RING) Output voltage ringing ui is the unit interval and is the inverse of the signaling rate (a.k.a. bit time). NA NA NA 0.04 3 k RL 7 k RL = 450 VO = 0 VCC = 0, VCC = 0, |VO| < 2 V |VO| < 6 V 5 NA 100 300 NA 30 NA NA NA 0.3 10% NA 100 232/V.28 MIN MAX 25 15 423/V.10 MIN 4 NA 3.6 150 300 NA 4 0.22 NA NA 5% 30 2.1 MAX 6 3.7 NA 60 562 MIN MAX 13.2 UNIT V V V mA A V/s s ui ui
receiver characteristics
PARAMETER |VI| VIT RI Input voltage Input voltage threshold Input resistance |VI| < 15 V |VI| < 10 V 3 V < |VI| < 15 V |VI| < 10 V -3 NA 3 NA 7 TEST CONDITIONS 232/V.28 MIN MAX 25 3 NA -0.2 NA 4 0.2 423/V.10 MIN MAX 10 -3 NA 3 NA 7 562 MIN MAX 25 3 UNIT V V V k k
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MECHANICAL INFORMATION
DW (R-PDSO-G**)
16 PIN SHOWN
PLASTIC SMALL-OUTLINE PACKAGE
0.050 (1,27) DIM 0.020 (0,51) 0.014 (0,35) 16 9 0.010 (0,25) M
PINS **
16 0.410 (10,41) 0.400 (10,16)
20 0.510 (12,95) 0.500 (12,70)
24 0.610 (15,49) 0.600 (15,24)
28 0.710 (18,03) 0.700 (17,78)
A MAX
A MIN
0.419 (10,65) 0.400 (10,15) 0.299 (7,59) 0.293 (7,45) 0.010 (0,25) NOM
Gage Plane 0.010 (0,25) 1 A 8 0- 8 0.050 (1,27) 0.016 (0,40)
Seating Plane 0.104 (2,65) MAX 0.012 (0,30) 0.004 (0,10) 0.004 (0,10) 4040000 / B 03/95 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 MS-013
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PACKAGE OPTION ADDENDUM
www.ti.com
4-Feb-2005
PACKAGING INFORMATION
Orderable Device SN75LBC777DW SN75LBC777DWR
(1)
Status (1) ACTIVE ACTIVE
Package Type SOIC SOIC
Package Drawing DW DW
Pins Package Eco Plan (2) Qty 20 20 25 2000 Pb-Free (RoHS) Pb-Free (RoHS)
Lead/Ball Finish CU NIPDAU CU NIPDAU
MSL Peak Temp (3) Level-2-250C-1YEAR/ Level-1-220C-UNLIM Level-2-250C-1YEAR/ Level-1-220C-UNLIM
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 - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. None: Not yet available Lead (Pb-Free). 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. Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder temperature. 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
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