购买 LM285D-2.5 | LM285D-2.5数据表 | Heisener.com
联系我们
SalesDept@heisener.com 86-755-83210559 x831

LM285D-2.5

hot LM285D-2.5

LM285D-2.5

仅供参考

零件编号 LM285D-2.5
制造商 ON Semiconductor
描述 IC VREF SHUNT 2.5V 8SOIC
数据表
封装 8-SOIC (0.154", 3.90mm Width)
ECAD
库存 541,272 piece(s)
单价 Request a Quote
交货时间 可立即发货
预计送达时间 四月 27 - 五月 2 (选择速递服务)
请求报价
支付方式
送货服务
  • 我们提供的 LM285D-2.5 具有全球市场竞争力的价格,如有需要请发送询价单给我们。谢谢!
  • 添加 LM285D-2.5 及其数量至BOM以便提交您的报价请求。 Heisener.com 无需注册便可以提交 LM285D-2.5 的报价请求。

LM285D-2.5参数

制造商ON Semiconductor
类别集成电路(IC) - PMIC - 电压基准
封装8-SOIC (0.154", 3.90mm Width)
ECAD
系列-
参考类型Shunt
输出类型Fixed
电压 - 输出(最小/固定)2.5V
电压 - 输出(最大值)-
电流 - 输出20mA
公差±1.5%
温度系数80ppm/°C Typical
噪音 - 0.1Hz至10Hz-
噪音 - 10Hz至10kHz120µVrms
电压 - 输入-
供电-
电流 - 阴极30µA
工作温度-40°C ~ 85°C (TA)
安装类型Surface Mount
包/箱8-SOIC (0.154", 3.90mm Width)
供应商设备包8-SOIC

LM285D-2.5 Packaging

Customized Labels
Sealing
Packing
Insepction

LM285D-2.5 FAQ

  • 1. How to order LM285D-2.5 on Heisener?
    Currently, Heisener only provide peer-to-peer order processing. While you submit the RFQ, our professional agent will contact you with the competitive prices in the global market, and our agent will prompt you to finish the order if you accept our offers.
  • 2. How does Heisener guarantee that LM285D-2.5 is from the original manufacturer or authorized agents?
    We have a professional and experienced quality control team to strictly verify and test the LM285D-2.5. All suppliers must pass our qualification reviews before they can publish their products including LM285D-2.5 on Heisener; we pay more attention to the channels and quality of LM285D-2.5 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
  • 3. Are the LM285D-2.5 price and inventory displayed accurate?
    The price and inventory of LM285D-2.5 fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.
  • 4. What forms of payment are accepted?
    Wire Transfer, PayPal, Alipay, Wechat, Credit Card, Western Union, MoneyGram, and Escrow are all acceptable.
    Warm Tips: Some orders in certain payment forms may require handling fee.
  • 5. How is the shipping arranged?
    Customers can choose industry-leading freight companies, including DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is also available.
    Once your order has been processed for shipment, our salesperson will send you an email advising you of the shipping status and tracking number.
    Warm Tips: It may take up to 24 hours for the carriers to display tracking information. Usually, express delivery takes 3-5 days, and registered mail takes 25-60 days.
  • 6. What is the process for return or replacement of LM285D-2.5?
    All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LM285D-2.5 we delivered, we will accept the replacement or return of the LM285D-2.5 only when all of the below conditions are fulfilled:
    (1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
    (2)We are informed of the defect described above within 90 days after the delivery of LM285D-2.5.
    (3)The PartNo is unused and only in the original unpacked packaging.
    Two processes to return the products:
    (1)Inform us within 90 days
    (2)Obtain Requesting Return Authorizations
  • 7.How to contact us to get technical supports, such as LM285D-2.5 pin diagram, LM285D-2.5 datasheet?
    If you need any after-sales service, please do not hesitate to contact us.

LM285D-2.5相关产品

1812GC102KATRE 1812GC102KATRE AVX Corporation, CAP CER 1000PF 2KV X7R 1812, 1812 (4532 Metric), - 查看
hotOPA251UA OPA251UA Texas Instruments, IC OPAMP GP 35KHZ RRO 8SOIC, 8-SOIC (0.154", 3.90mm Width), - 查看
MF-R500-AP-99 MF-R500-AP-99 Bourns Inc., FUSE PTC RESETTABLE, Radial, Disc, - 查看
RT0805CRD0715R4L RT0805CRD0715R4L Yageo, RES SMD 15.4 OHM 0.25% 1/8W 0805, 0805 (2012 Metric), - 查看
1946380000 1946380000 Weidmuller, TERM BLOCK PLUG 15POS 5.08MM, -, - 查看
ESS-107-T-25 ESS-107-T-25 Samtec Inc., ELEVATED SOCKET STRIPS, -, - 查看
0022022125 0022022125 Molex, LLC, CONN RECEPT 12POS .100 VERT PCB, -, - 查看
D38999/24FD19JN D38999/24FD19JN Amphenol Aerospace Operations, CONN RCPT FMALE 19POS GOLD CRIMP, -, - 查看
MS24266R16T10SN MS24266R16T10SN Cinch Connectivity Solutions, CONN PLUG FMALE 10POS GOLD CRIMP, -, - 查看
AIT6AC10SL-3PC-B30 AIT6AC10SL-3PC-B30 Amphenol Industrial Operations, ER 3C 3#16S PIN PLUG, -, - 查看
ACC61DTAZ-S664 ACC61DTAZ-S664 Sullins Connector Solutions, CONN EDGE DUAL FMALE 122POS .100, -, - 查看
EL5412IRZ-T7 EL5412IRZ-T7 Renesas Electronics America, IC OPAMP VFB 22MHZ RRO 14TSSOP, 14-TSSOP (0.173", 4.40mm Width), - 查看

LM285D-2.5 保证

Service Guarantee

服务保证

我们保证100%的客户满意度。

我们经验丰富的销售团队和技术支持团队支持我们的服务以满足所有客户。

Quality Guarantee

质量保证

我们提供90天保修。

如果您收到的物品质量不合格,我们将负责您的退款或更换,但物品必须以原始状态退回。

全球供应链-可靠的授权分销商资源

零件编号 制造商 描述 库存

LM285D-2.5R2G

D# V72:2272_07303995

ON Semiconductor

V-Ref Precision 2.5V 20mA 8-Pin SOIC N T/R

RoHS: Compliant
0

LM285D-2-5

D# V99:2348_07270608

Texas Instruments

V-Ref Precision 2.5V 20mA 8-Pin SOIC Tube

RoHS: Compliant
0

LM285D-2.5G

D# V36:1790_07301339

ON Semiconductor

V-Ref Precision 2.5V 20mA 8-Pin SOIC N Tube

RoHS: Compliant
0
零件编号 制造商 描述 库存

LM285D-2.5G

D# LM285D-2.5G

ON Semiconductor

V-Ref Precision 2.5V 20mA 8-Pin SOIC N Rail - Bulk (Alt: LM285D-2.5G)

RoHS: Compliant
0

LM285D-2.5R2

D# LM285D-2.5R2

ON Semiconductor

V-REF PRECISION 2.5V 20MA 8SOIC N - Bulk (Alt: LM285D-2.5R2)

RoHS: Not Compliant
0

LM285D-2.5R2G

D# LM285D-2.5R2G

ON Semiconductor

V-Ref Precision 2.5V 20mA 8-Pin SOIC N T/R - Bulk (Alt: LM285D-2.5R2G)

RoHS: Compliant
0
零件编号 制造商 描述 库存

LM285D-2.5R2G

D# LM285D-2.5R2G

ON Semiconductor

V-Ref Precision 2.5V 20mA 8-Pin SOIC N T/R (Alt: LM285D-2.5R2G)

RoHS: Compliant
0

LM285D-2.5G

D# LM285D-2.5G

ON Semiconductor

V-Ref Precision 2.5V 20mA 8-Pin SOIC N Rail (Alt: LM285D-2.5G)

RoHS: Compliant
0
零件编号 制造商 描述 库存

LM285D-2.5G

D# LM285D-2.5G

ON Semiconductor

V-Ref Precision 2.5V 20mA 8-Pin SOIC N Rail (Alt: LM285D-2.5G)

0

LM285D-2.5R2G

D# LM285D-2.5R2G

ON Semiconductor

V-Ref Precision 2.5V 20mA 8-Pin SOIC N T/R (Alt: LM285D-2.5R2G)

0
零件编号 制造商 描述 库存

LM285D-2-5

Texas Instruments

43

LM285D-2.5R2

Motorola Semiconductor Products

320

LM285D-2.5

Texas Instruments

600

LM285D-2.5R2G

ON Semiconductor

250
零件编号 制造商 描述 库存

LM285D-2.5R2

ON Semiconductor

ANA MICROPWR V-REG DIODE - Tape and Reel

262500

LM285D-2.5

ON Semiconductor

ANA MICROPWR V-REG DIODE - Tape and Reel

262500

LM285D-2.5G

ON Semiconductor

SHUNT V-REFERENCE, DIODE2.5V, 1.5%, 8-SOIC, Reference Type:Shunt, Input Voltage Min:-, Input Voltage Max:-, Reference Voltage:2.5V, Reference Voltage Tolerance:-, Voltage Reference Case Style:SOIC, No. of Pins:8, Packaging:Each , RoHS Compliant: Yes

0

LM285D-2-5

ON Semiconductor

ANA MICROPWR V-REG DIODE - Tape and Reel

262500

LM285D-2.5R2G

ON Semiconductor

ANA MICROPWR V-REG DIODE - Tape and Reel

262500
零件编号 制造商 描述 库存

LM285D-2.5R2G

ON Semiconductor

2.5V ±, 1.5% 80ppm/C SOIC-8_150mil Voltage References RoHS

3054

LM285D-2.5G

ON Semiconductor

SOIC-8 Voltage References RoHS

1957
零件编号 制造商 描述 库存

LM285D25R2

ON Semiconductor

RoHS: Not Compliant
0

LM285D25

Texas Instruments

RoHS: Compliant
0
零件编号 制造商 描述 库存

LM285D-2-5

D# 296-9522-5-ND

Texas Instruments

IC VREF SHUNT 1.5% 8SOIC

2665

LM285D2.5G

D# 2156-LM285D2.5G-OS-ND

Rochester Electronics LLC

IC VREF SHUNT 2.5V 8SOIC

980

LM285D-2.5R2

D# 2156-LM285D-2.5R2-ONTR-ND

Rochester Electronics LLC

TWO TERMINAL VOLTAGE REFERENCE

11596

LM285D-2.5G

D# LM285D-2.5GOS-ND

ON Semiconductor

IC VREF SHUNT 1.5% 8SOIC

24

LM285D-2.5

D# LM285D-2.5-ND

ON Semiconductor

IC VREF SHUNT 1.5% 8SOIC

0

LM285D-2.5R2G

D# LM285D-2.5R2GOSCT-ND

ON Semiconductor

IC VREF SHUNT 1.5% 8SOIC

4311
零件编号 制造商 描述 库存

LM285D-2.5

D# LM285D-2.5

National Semiconductor Corporation

Industry Leading ISO:9001/AS9120A Stocking Distributor of Obsolete & Hard to Find IC's/Semi's, Specializing in Altera/Xilinx. In-House Counterfeit Detection Lab. In Business 20 Years. Free Shipping on Orders Over $250. Buy American, Buy Direct

1117

LM285D-2.5R2

D# LM285D-2.5R2

National Semiconductor Corporation

Industry Leading ISO:9001/AS9120A Stocking Distributor of Obsolete & Hard to Find IC's/Semi's, Specializing in Altera/Xilinx. In-House Counterfeit Detection Lab. In Business 20 Years. Free Shipping on Orders Over $250. Buy American, Buy Direct

1968
零件编号 制造商 描述 库存

LM285D-2.5R2

Motorola Semiconductor Products

In stock shipping within 2days

1962

LM285D-2-5

Texas Instruments

In stock shipping within 2days

1150

LM285D-2.5R2G

ON Semiconductor

In stock shipping within 2days

6110
零件编号 制造商 描述 库存

LM285D-2-5

D# 8389195RL

Texas Instruments

VOLTAGE REF, SHUNT, 2.5V, SOIC-8

RoHS: Compliant
Min Qty: 1
Container: Reel
0

LM285D-2.5R2G

D# 2318565RL

ON Semiconductor

VOLTAGE REF, SHUNT, 2.5V, NSOIC-8

RoHS: Compliant
Min Qty: 1
Container: Reel
0

LM285D-2.5G

D# 2724320

ON Semiconductor

VOLTAGE REF, SHUNT, 2.5V, SOIC-8

RoHS: Compliant
Min Qty: 1
Container: Each
1442
零件编号 制造商 描述 库存

LM285D-2-5

Texas Instrumets

NEW AND ORGINAL. ISRAEL W.HOUSE

428

LM285D-2.5G

ON Semiconductor

NEW AND ORGINAL. ISRAEL W.HOUSE

428
零件编号 制造商 描述 库存

LM285D-2.5R2G

ON Semiconductor

LM385 Series 2.5 V 20 mA SMT Micropower Voltage Reference Diode - SOIC-8

RoHS: Compliant
pbFree: Yes
2500

LM285D-2.5G

ON Semiconductor

LM385 Series 2.5 V 20 mA SMT Micropower Voltage Reference Diode - SOIC-8

RoHS: Compliant
pbFree: Yes
406
零件编号 制造商 描述 库存

LM285D25G

OEM/CM QUOTES ONLY | NO BROKERS

2355

LM285D25R2G

ON Semiconductor

OEM/CM QUOTES ONLY | NO BROKERS

69600

LM285D25R2

National Semiconductor Corporation

OEM/CM QUOTES ONLY | NO BROKERS

17400

LM285D25G4

Texas Instruments

OEM/CM QUOTES ONLY | NO BROKERS

57

LM285D25

OEM/CM QUOTES ONLY | NO BROKERS

5800
零件编号 制造商 描述 库存

LM285D25VNEWROHS

Texas Instruments

OEM/CM ONLY

583

LM285D25V

Texas Instruments

OEM/CM ONLY

787

LM285D25R2GPBF

Texas Instruments

OEM/CM ONLY

1600

LM285D25R2S08ON

Maxim Integrated Products

OEM/CM ONLY

4211

LM285D25SO8

Texas Instruments

OEM/CM ONLY

365
零件编号 制造商 描述 库存

LM285D-2-5

Texas Instruments

In stock

43

LM285D-2.5R2G

ON Semiconductor

In Stock

250
零件编号 制造商 描述 库存

LM285D-2.5R2G

D# C7931

ON Semiconductor

5554

LM285D-2.5G

D# C480796

ON Semiconductor

1957
零件编号 制造商 描述 库存

LM285D-2.5R2G

ON Semiconductor

in stock - can ship the same day

982
零件编号 制造商 描述 库存

LM285D-2.5

Texas Instruments

OEM/CM Immediate delivery

17033

LM285D-2.5G

ON Semiconductor

OEM/CM Immediate delivery

52

LM285D-2.5R2G

ON Semiconductor

OEM/CM Immediate delivery

30000

LM285D-2-5

Texas Instruments

OEM/CM Immediate delivery

17033
零件编号 制造商 描述 库存

LM285D-2-5

D# 595-LM285D-2-5

Texas Instruments

Voltage References 2.5V Micro Pwr

RoHS: Compliant
2401

LM285D-2.5R2G

D# 863-LM285D-2.5R2G

ON Semiconductor

Voltage References 2.5V 10uA-20mA

RoHS: Compliant
1550
零件编号 制造商 描述 库存

LM285D-2.5G

D# XSKDRABS0039905

ON SEMICONDUCTOR

ANA MICROPWR V-REG DIODE

784

LM285D-2.5R2G

D# XSFP00000075112

ON SEMICONDUCTOR

LM385 Series 2.5 V 20 mA SMT Micropower Voltage Reference Diode - SOIC-8

5000
零件编号 制造商 描述 库存

LM285D-2.5G.

D# 29AC7489

ON Semiconductor

Voltage Reference Type:Shunt - Fixed, Product Range:-, Reference Voltage:2.5V, Initial Accuracy:1.5%, Temperature Coefficient:80ppm/°C, Voltage Reference Case Style:SOIC, No. of Pins:8Pins, Operating Temperature Min:-40°C RoHS Compliant: Yes

RoHS: Compliant
Min Qty: 98
Container: Bulk
0

LM285D-2.5G

D# 13AC9289

ON Semiconductor

VOLTAGE REF, SHUNT, 2.5V, SOIC-8, Voltage Reference Type:Shunt - Fixed, Product Range:-, Reference Voltage:2.5V, Initial Accuracy:1.5%, Temperature Coefficient:80ppm/°C, Voltage Reference Case Style:SOIC, No. of Pins:8Pins, OperatingRoHS Compliant: Yes

RoHS: Compliant
Min Qty: 1
Container: Bulk
671

LM285D-2-5

D# 29AH6263

Texas Instruments

VOLTAGE REF, SHUNT, 2.5V, SOIC-8, Voltage Reference Type:Shunt - Fixed, Product Range:LM285 Series, Reference Voltage:2.5V, Initial Accuracy:1.5%, Temperature Coefficient:± 20ppm/°C, Voltage Reference Case Style:SOIC, No. of RoHS Compliant: Yes

RoHS: Compliant
Min Qty: 1
Container: Bulk
1166

LM285D-2.5R2G

D# 38X6193

ON Semiconductor

VOLTAGE REFERENCE, 2.5V, SOIC-8, Voltage Reference Type:Shunt - Fixed, Product Range:LM285 Series, Reference Voltage:2.5V, Initial Accuracy:1.5%, Temperature Coefficient:80ppm/°C, Voltage Reference Case Style:NSOIC, No. of Pins:8PinsRoHS Compliant: Yes

RoHS: Compliant
Min Qty: 2500
Container: Cut Tape
0
零件编号 制造商 描述 库存

LM285D-2.5R2G

D# NS-LM285D-2.5R2G

ON Semiconductor

OEM/CM ONLY

7552

LM285D-2-5

D# NS-LM285D-2-5

Texas Instruments

OEM/CM ONLY

8894

LM285D-2.5R2

D# NS-LM285D-2.5R2

ON Semiconductor

OEM/CM ONLY

6145

LM285D-2.5G

D# NS-LM285D-2.5G

ON Semiconductor

OEM/CM ONLY

4903

LM285D-2.5

D# NS-LM285D-2.5

ON Semiconductor

OEM/CM ONLY

2444
零件编号 制造商 描述 库存

LM285D-2.5G

ON Semiconductor

1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8

196

LM285D-2.5R2

ON Semiconductor

Voltage Reference, Fixed, 2.5V, 8 Pin, Plastic, SOP

128

LM285D-2.5G4

Texas Instruments

1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5V, PDSO8

49
零件编号 制造商 描述 库存

LM285D-2.5R2

D# LM285D-2dot5R2

ON Semiconductor

Semiconductor

1670

LM285D-2.5

D# LM285D-2dot5

ON Semiconductor

Semiconductor

4346
零件编号 制造商 描述 库存

LM285D-2.5G

D# 6888780

ON Semiconductor

ON Semiconductor Fixed Shunt Voltage Reference 2.5V 1.5 % 8-Pin SOIC, LM285D-2.5G, PK

Min Qty: 2
Container: Package
400
零件编号 制造商 描述 库存

LM285D2.5G

ON Semiconductor

IC VREF SHUNT 2.5V 8SOIC

RoHS: Compliant
980

LM285D-2.5R2G

ON Semiconductor

LM285 - Two Terminal Voltage Reference

RoHS: Compliant
44000

LM285D-2.5R2

ON Semiconductor

LM285 - Two Terminal Voltage Reference

RoHS: Compliant
11596

LM285D-2.5G

ON Semiconductor

LM285 - IC VREF SHUNT 2.5V 8SOIC

RoHS: Compliant
10120
零件编号 制造商 描述 库存

LM285D2.5R2G

ON Semiconductor

OEM/CM ONLY

12516

LM285D2.5G4

Texas Instruments

OEM/CM ONLY

65

LM285D2.5G

ON Semiconductor

OEM/CM ONLY

1166

LM285D2.5

Texas Instruments

OEM/CM ONLY

10330

LM285D2.5R2

ON Semiconductor

OEM/CM ONLY

17387
零件编号 制造商 描述 库存

LM285D-2.5

Texas Instruments

IN stock Immediate delivery

17018

LM285D-2.5G

ON Semiconductor

IN stock Immediate delivery

47

LM285D-2-5

Texas Instruments

IN stock Immediate delivery

17018

LM285D-2.5R2G

ON Semiconductor

IN stock Immediate delivery

29985
零件编号 制造商 描述 库存

LM285D-2-5

Texas Instruments

2.5-V, –40°C to +85°C, micropower voltage reference

3
零件编号 制造商 描述 库存

LM285D-2.5R2G

ON Semiconductor

shipping today

17

LM285D-2.5R2

ON Semiconductor

shipping today

14999

LM285D-2.5G

ON Semiconductor

shipping today

51
零件编号 制造商 描述 库存

LM285D-2.5G

D# 53416128

ON Semiconductor

V-Ref Precision 2.5V 20mA 8-Pin SOIC N Tube

RoHS: Compliant
0
零件编号 制造商 描述 库存

LM285D-2.5GOS

ON Semiconductor

RFQ

12487

LM285D-2.5R2

Motorola Semiconductor Products

RFQ

3175

LM285D-2.5R2GOSTR

ON Semiconductor

RFQ

9971

LM285D-2.5

mfr

RFQ

7029

LM285D-2.5R2GOSCT

ON Semiconductor

RFQ

8356

LM285D-2-5

Texas Instruments

RFQ

6510

LM285D25

ON Semiconductor

RFQ

6944
零件编号 制造商 描述 库存

LM285D-2.5R2G

ON Semiconductor

IC VREF SHUNT 2.5V 8SOIC

3520
零件编号 制造商 描述 库存

LM285D-2-5

D# 3124365

Texas Instruments

VOLTAGE REF, SHUNT, 2.5V, SOIC-8

RoHS: Compliant
Min Qty: 1
Container: Each
1166

LM285D-2.5R2G

D# 2318565RL

ON Semiconductor

VOLTAGE REF, SHUNT, 2.5V, NSOIC-8

RoHS: Compliant
Min Qty: 1
Container: Reel
0

LM285D-2.5G

D# 2724320

ON Semiconductor

VOLTAGE REF, SHUNT, 2.5V, SOIC-8

RoHS: Compliant
Min Qty: 1
Container: Each
671

Quick Inquiry

LM285D-2.5

质量认证

黑森尔对质量的承诺,塑造了我们的采购、测试、运输流程以及它们之间的每一步。这个基准是我们所销售的每一个元器件的基础。

广东省“守合同重信用”企业ISO9001:2015, ICAS, IAF, UKAS

查看证书

联系我们

您有关于 LM285D-2.5 的问题吗?

LM285D-2-5 QRCode

扫描以查看此页面

推荐产品

766161102GPTR13

RES ARRAY 15 RES 1K OHM 16SOIC

LT1308BIS8#TRPBF

IC REG BOOST SEPIC ADJ 2A 8SOIC

DS1818R-10+T&R

IC 2.88V W/PB 10% SOT23-3

AD5546BRUZ

IC DAC 16BIT PARALL IN 28-TSSOP

744066101

FIXED IND 100UH 1.2A 300 MOHM

MBR0530T1G

DIODE SCHOTTKY 30V 500MA SOD123

ATMEGA169P-16AU

IC MCU 8BIT 16KB FLASH 64TQFP

SP0506BAATG

TVS DIODE 5.5VWM 8.5VC 8MSOP

MC9S08DN16ACLC

IC MCU 8BIT 16KB FLASH 32LQFP

MTFC8GLWDQ-3M AIT Z TR

IC FLASH 64GBIT 100LBGA

更多 »

LM285D-2.5 Tags

  • LM285D-2.5
  • LM285D-2.5 PDF
  • LM285D-2.5 数据表
  • LM285D-2.5 规格
  • LM285D-2.5 图片
  • ON Semiconductor
  • ON Semiconductor LM285D-2.5
  • 买 LM285D-2.5
  • LM285D-2.5 价格
  • LM285D-2.5 经销商
  • LM285D-2.5 供应商
  • LM285D-2.5 批发

LM285D-2.5可用于