| 部品番号 | UC3843D |
|---|---|
| メーカ | ON Semiconductor |
| 説明 | IC REG CTRLR 14SOIC |
| データシート | |
| パッケージ | 14-SOIC (0.209", 5.30mm Width) |
| ECAD |
|
| 在庫 | 8,208 piece(s) |
| 単価 | $ 1.6759 * |
| リードタイム | すぐに出荷可能 |
| 推定配達時間 | 4 30 - 5 5 (迅速な出荷を選択) |
| 見積もりを依頼する |
|
| お支払い方法 | |
| 配達サービス |
| メーカ | ON Semiconductor |
| 範疇 | 集積回路（IC） - PMIC - 電圧レギュレータ－DC DCスイッチングコントローラ |
| パッケージ | 14-SOIC (0.209", 5.30mm Width) |
| ECAD |
|
| シリーズ | - |
| 出力タイプ | Transistor Driver |
| 関数 | Step-Up, Step-Up/Step-Down |
| 出力構成 | Positive |
| トポロジー | Boost, Flyback |
| 出力数 | 1 |
| 出力フェーズ | 1 |
| 電圧 - 電源（Vcc / Vdd） | 7.6 V ~ 30 V |
| 周波数 - スイッチング | Up to 500kHz |
| デューティサイクル（最大） | 97% |
| 同期整流器 | No |
| クロック同期 | No |
| シリアルインタフェース | - |
| 制御機能 | Frequency Control |
| 動作温度 | 0°C ~ 70°C (TA) |
| パッケージ/ケース | 14-SOIC (0.209", 5.30mm Width) |
| サプライヤデバイスパッケージ | 14-SOP |
|
1825Y0250104JXT | Knowles Syfer, CAP CER 0.1UF 25V X7R 1825, 1825 (4564 Metric), - | 見る |
|
|
100B9R1JW500XT | American Technical Ceramics, CAP CER 9.1PF 500V P90 1111, 1111 (2828 Metric), - | 見る |
|
25ZL1800MEFCGC16X20 | Rubycon, CAP ALUM 1800UF 20% 25V RADIAL, Radial, Can, - | 見る |
|
S-1112B17PI-L6CTFU | SII Semiconductor Corporation, IC REG LINEAR 1.7V 150MA SNT6A, 6-SMD, Flat Leads, - | 見る |
|
|
JAN1N6152 | Microsemi Corporation, TVS DIODE 20.6VWM 39.27VC CPKG, Axial, - | 見る |
|
|
HTB-54M-R | Eaton, FUSE HLDR CART 250V 16A PNL MNT, -, - | 見る |
|
|
S0603-10NJ1 | API Delevan Inc., FIXED IND 10NH 700MA 160 MOHM, 0603 (1608 Metric), - | 見る |
|
|
85810-112 | Amphenol FCI, 85810-112 METRAL CONNECTOR, -, - | 見る |
|
|
50015-1180ALF | Amphenol FCI, 4 ROW VERTICAL HEADER SOLDER, -, - | 見る |
|
LEG75W-142-C0530 | Thomas Research Products, LED DRIVR CC AC/DC 48-142V 530MA, -, - | 見る |
|
MP6-1V-1V-1V-4LL-00 | Artesyn Embedded Technologies, MP CONFIGURABLE POWER SUPPLY, -, - | 見る |
|
|
VE-B4M-IU-F4 | Vicor Corporation, CONVERTER MOD DC/DC 10V 200W, Full Brick, - | 見る |
100％の顧客満足度を保証します。
経験豊富なセールスチームとテクニカルサポートチームがすべての顧客を満足させるためにサービスをサポートしています
90日間の保証を提供します。
あなたが受け取ったアイテムが完全な品質でないならば、我々はあなたの払い戻しまたは交換に対して責任があります、しかし、アイテムは彼らの元の状態で返されなければなりません。
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D D# V36:1790_07428531 |
Texas Instruments |
Current Mode PWM Controller 200mA 500kHz 14-Pin SOIC Tube RoHS: Compliant
|
0 |
UC3843DTR D# V72:2272_07428544 |
Texas Instruments |
Current Mode PWM Controller 200mA 500kHz 14-Pin SOIC T/R RoHS: Compliant
|
0 |
UC3843D8G4 D# V36:1790_07428535 |
Texas Instruments |
Current Mode PWM Controller 200mA 500kHz 8-Pin SOIC Tube RoHS: Compliant
|
0 |
UC3843D8 D# V36:1790_07428532 |
Texas Instruments |
Current Mode PWM Controller 200mA 500kHz 8-Pin SOIC Tube RoHS: Compliant
|
0 |
UC3843D8TR D# V72:2272_07428537 |
Texas Instruments |
Current Mode PWM Controller 200mA 500kHz 8-Pin SOIC T/R RoHS: Compliant
|
0 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D D# UC3843D |
Texas Instruments |
Current Mode PWM Controller 1A 14-Pin SOIC Tube (Alt: UC3843D) |
0 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843DTR |
Unitrode Corporation | 4995 | |
UC3843D |
UNIT | 336 | |
UC3843D8 |
Unitrode Corporation | 370 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843DTRG4 |
Texas Instruments |
IC REG CTRLR PWM CM 14SOIC |
0 |
UC3843DTR |
Texas Instruments |
IC REG CTRLR PWM CM 14SOIC |
0 |
UC3843D |
Fairchild Semiconductor Corporation |
N/A 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO14 SOP-14 |
810 |
UC3843D8TR |
Texas Instruments |
CURRENT MODE PWM CONTROLLER, 25V, 8-SOIC, Input Voltage:25V, Output Voltage:13.5V, Output Current:200mA, Supply Voltage Min:12V, Supply Voltage Max:25V, Controller IC Case Style:SOIC, No. of Pins:8, Frequency:450kHz , RoHS Compliant: Yes |
0 |
UC3843DX |
Fairchild Semiconductor Corporation |
N/A 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO14 SOP-14 |
810 |
UC3843D8TRG4 |
Texas Instruments |
(T/R) CUR MODE PWM CONT - Tape and Reel |
0 |
UC3843D8G4 |
Texas Instruments |
IC REG CTRLR PWM CM 8SOIC |
0 |
UC3843DG4 |
Texas Instruments |
PWM CONTROLLER CURRENT MODE, SOIC14, Input Voltage:25V, Output Voltage:13.5V, Output Current:1A, Supply Voltage Min:12V, Supply Voltage Max:25V, Controller IC Case Style:SOIC, No. of Pins:14, Frequency:500kHz, Operating Temperature , RoHS Compliant: Yes |
382 |
UC3843D8 |
Texas Instruments |
CURRENT MODE PWM CONTROLLER, 25V, 8-SOIC, Input Voltage:25V, Output Voltage:13.5V, Output Current:200mA, Supply Voltage Min:12V, Supply Voltage Max:25V, Controller IC Case Style:SOIC, No. of Pins:8, Frequency:450kHz , RoHS Compliant: Yes |
0 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D1X |
Fairchild Semiconductor Corporation |
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8 RoHS: Compliant
|
0 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8TR D# 296-46260-1-ND |
Texas Instruments |
IC REG CTRLR MULT TOPOLOGY 8SOIC |
4399 |
UC3843DX D# UC3843DX-ND |
ON Semiconductor |
IC REG CTRLR 14SOIC |
0 |
UC3843D8 D# 296-11287-5-ND |
Texas Instruments |
IC REG CTRLR MULT TOPOLOGY 8SOIC |
681 |
UC3843DR-8 D# 2156-UC3843DR-8-ND |
Rochester Electronics LLC |
SWITCHING CONTROLLER |
22500 |
UC3843D8TRG4 D# UC3843D8TRG4-ND |
Texas Instruments |
IC REG CTRLR MULT TOPOLOGY 8SOIC |
0 |
UC3843D D# 2156-UC3843D-FS-ND |
Rochester Electronics LLC |
SWITCHING CONTROLLER |
12903 |
UC3843DG4 D# UC3843DG4-ND |
Texas Instruments |
IC REG CTRLR MULT TOP 14SOIC |
0 |
UC3843D8G4 D# UC3843D8G4-ND |
Texas Instruments |
IC REG CTRLR MULT TOPOLOGY 8SOIC |
0 |
UC3843DTR D# 296-46261-1-ND |
Texas Instruments |
IC REG CTRLR MULT TOP 14SOIC |
12 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D013TR |
STMicroelectronics |
In stock shipping within 2days |
5260 |
UC3843DR |
- |
In stock shipping within 2days |
120 |
UC3843D8 |
Texas Instruments |
In stock shipping within 2days |
342 |
UC3843D |
N |
In stock shipping within 2days |
4662 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8 D# 3008565 |
Texas Instruments |
PWM CONTROLLER, SMD, 3843, SOIC8 RoHS: Compliant
Min Qty: 1
Container: Each
|
359 |
UC3843D D# 1505584 |
ON Semiconductor |
IC, PWM CONTROLLER RoHS: Compliant
Min Qty: 4860
Container: Each
|
0 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D |
STMicroelectronics |
Stock |
320 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843DB |
ORIGINAL |
OEM/CM QUOTES ONLY | NO BROKERS |
45 |
UC3843D013TR1 |
STMicroelectronics |
OEM/CM QUOTES ONLY | NO BROKERS |
2975 |
UC3843D |
STMICR |
OEM/CM QUOTES ONLY | NO BROKERS |
53550 |
UC3843D1X |
Fairchild Semiconductor Corporation |
OEM/CM QUOTES ONLY | NO BROKERS |
1660 |
UC3843D013 |
STMicroelectronics |
OEM/CM QUOTES ONLY | NO BROKERS |
1767 |
UC3843D8TR |
TI Texas Instruments |
OEM/CM QUOTES ONLY | NO BROKERS |
4605 |
UC3843DW |
UNI |
OEM/CM QUOTES ONLY | NO BROKERS |
21791 |
UC3843DR8 |
Rochester Electronics LLC |
OEM/CM QUOTES ONLY | NO BROKERS |
26775 |
UC3843D8SMD |
N/A |
OEM/CM QUOTES ONLY | NO BROKERS |
2509 |
UC3843D8 |
Texas Instruments |
OEM/CM QUOTES ONLY | NO BROKERS |
4033 |
UC3843D8TRG4 |
Texas Instruments |
OEM/CM QUOTES ONLY | NO BROKERS |
5950 |
UC3843D013TR |
OEM/CM QUOTES ONLY | NO BROKERS |
14875 | |
UC3843DR |
Texas Instruments |
OEM/CM QUOTES ONLY | NO BROKERS |
8925 |
UC3843DTR |
251 |
OEM/CM QUOTES ONLY | NO BROKERS |
5950 |
UC3843DX |
FAIR |
OEM/CM QUOTES ONLY | NO BROKERS |
3570 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8G4 |
Texas Instruments |
OEM/CM ONLY |
242 |
UC3843DG4 |
Texas Instruments |
OEM/CM ONLY |
1081 |
UC3843DFAIR |
Texas Instruments |
OEM/CM ONLY |
1774 |
UC3843D14 |
Texas Instruments |
OEM/CM ONLY |
110 |
UC3843DSOP14 |
Texas Instruments |
OEM/CM ONLY |
1100 |
UC3843DB |
Texas Instruments |
OEM/CM ONLY |
598 |
UC3843DTRG4 |
Texas Instruments |
OEM/CM ONLY |
230 |
UC3843D1R2G |
Texas Instruments |
OEM/CM ONLY |
4600 |
UC3843D8PR |
Texas Instruments |
OEM/CM ONLY |
871 |
UC3843D8TRG |
Texas Instruments |
OEM/CM ONLY |
910 |
UC3843DRSOIC14 |
Texas Instruments |
OEM/CM ONLY |
656 |
UC3843D8C |
Texas Instruments |
OEM/CM ONLY |
391 |
UC3843D8SOIC8 |
Texas Instruments |
OEM/CM ONLY |
849 |
TIUC3843D8 |
Texas Instruments |
OEM/CM ONLY |
6022 |
UC3843D8TRG4 |
Texas Instruments |
OEM/CM ONLY |
902 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843DTR |
Texas Instruments |
Boost, Buck, Buck-Boost, Flyback, Forward Regulator Positive, Isolation Capable Output Step-Up, Step-Down, Step-Up/Step-Down - DC-DC Controller IC 14-SOIC RoHS: Compliant
|
2795 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D |
Unitrode Corporation |
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14 |
20 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843DB |
UC |
OEM/CM Immediate delivery |
855 |
UC3843DTR |
Texas Instruments |
OEM/CM Immediate delivery |
2795 |
UC3843D |
Fairchild Semiconductor Corporation |
OEM/CM Immediate delivery |
36530 |
UC3843D8TR |
Texas Instruments |
OEM/CM Immediate delivery |
1667 |
UC3843DX |
Fairchild Semiconductor Corporation |
OEM/CM Immediate delivery |
36530 |
UC3843D8 |
Texas Instruments |
OEM/CM Immediate delivery |
180 |
UC3843D013TR |
STMicroelectronics |
OEM/CM Immediate delivery |
30000 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8TRG4 D# 595-UC3843D8TRG4 |
Texas Instruments |
Switching Controllers Current-Mode PWM Controller RoHS: Compliant
|
144 |
UC3843D D# 595-UC3843D |
Texas Instruments |
Switching Controllers Current Mode RoHS: Compliant
|
854 |
UC3843DTR D# 595-UC3843DTR |
Texas Instruments |
Switching Controllers Current-Mode PWM Controller RoHS: Compliant
|
771 |
UC3843D8G4 D# 595-UC3843D8G4 |
Texas Instruments |
Switching Controllers Current-Mode PWM Controller RoHS: Compliant
|
600 |
UC3843D8 D# 595-UC3843D8 |
Texas Instruments |
Switching Controllers Current Mode RoHS: Compliant
|
651 |
UC3843D8TR D# 595-UC3843D8TR |
Texas Instruments |
Switching Controllers Current-Mode PWM Controller RoHS: Compliant
|
4009 |
UC3843DG4 D# 595-UC3843DG4 |
Texas Instruments |
Switching Controllers Current-Mode PWM Controller RoHS: Compliant
|
372 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8 D# 29AH8389 |
Texas Instruments |
PWM CONTROLLER, SMD, 3843, SOIC8, Input Voltage:15V, Output Voltage:5V, Output Current:1A, Supply Voltage Min:12V, Supply Voltage Max:25V, Controller IC Case Style:SOIC, No. of Pins:8Pins, Frequency:450kHz, Operating Temperature RoHS Compliant: Yes RoHS: Compliant
Min Qty: 1
Container: Bulk
|
359 |
UC3843D8 . D# 20M7804 |
Texas Instruments |
PWM CONTROLLER, SMD, 3843, SOIC8, Input Voltage:15V, Output Voltage:5V, Output Current:1A, Supply Voltage Min:12V, Supply Voltage Max:25V, Controller IC Case Style:SOIC, No. of Pins:8Pins, Frequency:450kHz, Operating Temperature RoHS Compliant: Yes RoHS: Compliant
Min Qty: 1
Container: Bulk
|
4 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8G4 D# NS-UC3843D8G4 |
Texas Instruments |
OEM/CM ONLY |
6232 |
UC3843DG4 D# NS-UC3843DG4 |
Texas Instruments |
OEM/CM ONLY |
5539 |
UC3843D8 D# NS-UC3843D8 |
Texas Instruments |
OEM/CM ONLY |
1874 |
UC3843DTRG4 D# NS-UC3843DTRG4 |
Texas Instruments |
OEM/CM ONLY |
2712 |
UC3843D1 D# NS-UC3843D1 |
VARIOUS |
OEM/CM ONLY |
7370 |
UC3843DTR D# NS-UC3843DTR |
Texas Instruments |
OEM/CM ONLY |
3675 |
UC3843D8TR D# NS-UC3843D8TR |
Texas Instruments |
OEM/CM ONLY |
7416 |
UC3843DX D# NS-UC3843DX |
Fairchild Semiconductor Corporation |
OEM/CM ONLY |
4322 |
UC3843D D# NS-UC3843D |
Texas Instruments |
OEM/CM ONLY |
1636 |
UC3843D8TRG4 D# NS-UC3843D8TRG4 |
Texas Instruments |
OEM/CM ONLY |
4138 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843DR |
Texas Instruments |
Swithed-Mode Power Supply Controller, Current Mode Type, Bi-Polar, 14 Pin, Plastic, SOP |
551 |
UC3843DTR |
Unitrode Corporation |
1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO14 |
3996 |
UC3843D |
Unitrode Corporation |
Swithed-Mode Power Supply Controller, Current Mode Type, Bi-Polar, 14 Pin, Plastic, SOP |
10 |
UC3843D8TR |
Unitrode Corporation | 429 | |
UC3843D8 |
Texas Instruments |
Swithed-Mode Power Supply Controller, Current Mode Type, Bi-Polar, 8 Pin, Plastic, SOP |
46 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D D# UC3843D |
Texas Instruments |
Semiconductor |
197 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8 D# 6615336P |
Texas Instruments |
Texas Instruments UC3843D8, PWM Current Mode Controller, 1 A, 500 kHz, 8-Pin SOIC, TU Min Qty: 5
Container: Tube
|
15 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8 |
Texas Instruments |
UC3843 Current-Mode PWM Controller RoHS: Compliant
|
18159 |
UC3843DR-8 |
Texas Instruments |
UC3843 Current-Mode PWM Controller RoHS: Compliant
|
22500 |
UC3843D |
Texas Instruments |
UC3843 Current-Mode PWM Controller RoHS: Compliant
|
12903 |
UC3843D8G4 |
Texas Instruments |
UC3843 Current-Mode PWM Controller RoHS: Compliant
|
40 |
UC3843DTR |
Texas Instruments |
UC3843 Current-Mode PWM Controller RoHS: Compliant
|
10982 |
UC3843D8TR |
Texas Instruments |
UC3843 Current-Mode PWM Controller RoHS: Compliant
|
24208 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8TRG4 |
Texas Instruments |
OEM/CM ONLY |
5011 |
UC3843DX |
Fairchild Semiconductor Corporation |
OEM/CM ONLY |
3016 |
UC3843D |
Fairchild Semiconductor Corporation |
OEM/CM ONLY |
69422 |
UC3843D013TR |
SGS Semiconductor Ltd |
OEM/CM ONLY |
12516 |
UC3843DR |
Texas Instruments |
OEM/CM ONLY |
8205 |
UC3843D8 |
Texas Instruments |
OEM/CM ONLY |
3099 |
UC3843D013 |
STMicroelectronics |
OEM/CM ONLY |
1501 |
UC3843DB |
ORIGINAL |
OEM/CM ONLY |
54 |
UC3843D1X |
Fairchild Semiconductor Corporation |
OEM/CM ONLY |
1411 |
UC3843D1 |
Fairchild Semiconductor Corporation |
OEM/CM ONLY |
115 |
UC3843DW |
Texas Instruments |
OEM/CM ONLY |
18328 |
UC3843D8SMD |
OEM/CM ONLY |
2124 | |
UC3843DTR |
Texas Instruments |
OEM/CM ONLY |
10011 |
UC3843D8TR |
Texas Instruments |
OEM/CM ONLY |
3886 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8 |
Texas Instruments |
IN stock Immediate delivery |
175 |
UC3843DB |
UC |
IN stock Immediate delivery |
850 |
UC3843DTR |
Texas Instruments |
IN stock Immediate delivery |
2810 |
UC3843D8TR |
Texas Instruments |
IN stock Immediate delivery |
1682 |
UC3843D |
Fairchild Semiconductor Corporation |
IN stock Immediate delivery |
36515 |
UC3843DX |
Fairchild Semiconductor Corporation |
IN stock Immediate delivery |
36515 |
UC3843D013TR |
STMicroelectronics |
IN stock Immediate delivery |
29985 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D |
Texas Instruments |
Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle, 0C to 70C |
7 |
UC3843DTR |
Texas Instruments |
Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle, 0C to 70C |
1 |
UC3843D8TR |
Texas Instruments |
Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle, 0C to 70C |
106 |
UC3843D8 |
Texas Instruments |
Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle, 0C to 70C |
9 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8TR |
Texas Instruments |
shipping today |
12496 |
UC3843D8 |
Texas Instruments |
shipping today |
6109 |
UC3843D013TR |
UC |
shipping today |
558 |
UC3843D |
UC |
shipping today |
1456 |
UC3843DR |
Texas Instruments |
shipping today |
2349 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843DTR D# 36439000 |
Texas Instruments |
Current Mode PWM Controller 200mA 500kHz 14-Pin SOIC T/R RoHS: Compliant
|
0 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8 TI |
Texas Instruments |
RFQ |
9365 |
UC3843DG4 |
Texas Instruments |
RFQ |
1774 |
UC3843D8G4 |
Texas Instruments |
RFQ |
3723 |
UC3843D |
Texas Instruments |
RFQ |
13181 |
UC3843D013TR-1 |
STMicroelectronics |
RFQ |
7520 |
UC3843D8 |
Texas Instruments |
RFQ |
223 |
UC3843DB |
UC |
RFQ |
3585 |
UC3843D1 |
Fairchild Semiconductor Corporation |
RFQ |
7009 |
UC3843D-8 |
Texas Instruments |
RFQ |
4824 |
UC3843D8TR |
Texas Instruments |
RFQ |
8024 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8TR |
Texas Instruments |
IC REG CTRLR MULT TOPOLOGY 8SOIC |
14282 |
UC3843D8 |
Texas Instruments |
IC REG CTRLR MULT TOPOLOGY 8SOIC |
870 |
UC3843D |
Texas Instruments |
IC REG CTRLR MULT TOP 14SOIC |
4600 |
| 部品番号 | メーカ | 説明 | 在庫 |
UC3843D8 D# 3008565 |
Texas Instruments |
PWM CONTROLLER, SMD, 3843, SOIC8 RoHS: Compliant
Min Qty: 1
Container: Each
|
359 |
Heisenerの品質へのこだわりは、調達、テスト、出荷、そしてその間のあらゆるステップのための私達のプロセスを形作りました。 この基盤は私達が販売する各部品の基礎になります。
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