购买 MC74AC02D | MC74AC02D数据表 | Heisener.com
联系我们
SalesDept@heisener.com +86-0755-87210559 ext.802

MC74AC02D

MC74AC02D

MC74AC02D

仅供参考

零件编号 MC74AC02D
制造商 ON Semiconductor
描述 IC GATE NOR 4CH 2-INP 14-SOIC
数据表
封装 14-SOIC (0.154", 3.90mm Width)
ECAD
库存 2,240 piece(s)
单价 $ 0.0931 *
交货时间 待确认
预计送达时间 十二月 25 - 十二月 30 (选择速递服务)
请求报价
支付方式
送货服务
  • 我们提供的 MC74AC02D 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 MC74AC02D 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 MC74AC02D 的报价请求。

MC74AC02D参数

制造商ON Semiconductor
类别集成电路(IC) - 逻辑 - 栅极和逆变器
封装14-SOIC (0.154", 3.90mm Width)
ECAD
系列74AC
逻辑类型NOR Gate
电路数量4
输入数量2
特征-
电压 - 电源2 V ~ 6 V
电流 - 静态(最大)4µA
电流 - 输出高,低24mA, 24mA
逻辑电平 - 低0.9 V ~ 1.65 V
逻辑电平 - 高2.1 V ~ 3.85 V
最大传播延迟@ V,最大CL6.5ns @ 5V, 50pF
工作温度-40°C ~ 85°C
安装类型Surface Mount
供应商设备包14-SOIC
包/箱14-SOIC (0.154", 3.90mm Width)

MC74AC02D Packaging

Customized Labels
Sealing
Packing
Insepction

MC74AC02D FAQ

  • 1. How to order MC74AC02D 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 MC74AC02D is from the original manufacturer or authorized agents?
    We have a professional and experienced quality control team to strictly verify and test the MC74AC02D. All suppliers must pass our qualification reviews before they can publish their products including MC74AC02D on Heisener; we pay more attention to the channels and quality of MC74AC02D products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
  • 3. Are the MC74AC02D price and inventory displayed accurate?
    The price and inventory of MC74AC02D 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 MC74AC02D?
    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 MC74AC02D we delivered, we will accept the replacement or return of the MC74AC02D 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 MC74AC02D.
    (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 MC74AC02D pin diagram, MC74AC02D datasheet?
    If you need any after-sales service, please do not hesitate to contact us.

MC74AC02D相关产品

C1812X273F4JACAUTO C1812X273F4JACAUTO KEMET, CAP CER 1812 27NF 16V U2J 1%, -, 74AC 查看
2225J1K50820GCT 2225J1K50820GCT Knowles Syfer, CAP CER 2225, -, 74AC 查看
36D163G040BE2A 36D163G040BE2A Vishay Sprague, CAP ALUM 16000UF 40V SCREW, Radial, Can - Screw Terminals, 74AC 查看
hotSN75LVDS387DGGG4 SN75LVDS387DGGG4 Texas Instruments, IC 16-CH HS DIFF DRIVER 64-TSSOP, 64-TFSOP (0.240", 6.10mm Width), 74AC 查看
TMS320LC50PQ50 TMS320LC50PQ50 Texas Instruments, IC DSP 132-BQFP, 132-BQFP Bumpered, 74AC 查看
MLW3020-28RD-2A MLW3020-28RD-2A NKK Switches, SWITCH ROCKER SP3T 5A 125V, -, 74AC 查看
MDF7-13S-2.54DSA(55) MDF7-13S-2.54DSA(55) Hirose Electric Co Ltd, CONN RECEPT 13POS SINGLE TIN, -, 74AC 查看
SFW26R-3STE1LF SFW26R-3STE1LF Amphenol FCI, CONN FFC BOTTOM 26POS 1.00MM R/A, -, 74AC 查看
195-015-213L551 195-015-213L551 NorComp Inc., CONN D-SUB HD RCPT 15POS PNL MNT, -, 74AC 查看
MS3102R24-12PZ MS3102R24-12PZ ITT Cannon, LLC, CONN RCPT 5 POS BOX MNT W/PINS, -, 74AC 查看
RSC36DTEI RSC36DTEI Sullins Connector Solutions, CONN EDGE DUAL FMALE 72POS 0.100, -, 74AC 查看
VE-21L-EY-F2 VE-21L-EY-F2 Vicor Corporation, CONVERTER MOD DC/DC 28V 50W, Full Brick, 74AC 查看

MC74AC02D 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

MC74AC02DTR2G

D# V72:2272_07297812

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin TSSOP W T/R

RoHS: Compliant
0

MC74AC02DG

D# V36:1790_07323121

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC N Tube

RoHS: Compliant
0

MC74AC02DR2G

D# V72:2272_07310107

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC N T/R

RoHS: Compliant
0
零件编号 制造商 描述 库存

MC74AC02DTR2G

D# MC74AC02DTR2G

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin TSSOP T/R - Bulk (Alt: MC74AC02DTR2G)

0

MC74AC02D

D# MC74AC02D

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC Rail - Bulk (Alt: MC74AC02D)

RoHS: Not Compliant
0

MC74AC02DTR2

D# MC74AC02DTR2

ON Semiconductor

NOR GATE 4-ELEM 2-IN CMOS 14TSSOP - Bulk (Alt: MC74AC02DTR2)

0

MC74AC02DG

D# MC74AC02DG

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC Rail - Rail/Tube (Alt: MC74AC02DG)

RoHS: Compliant
0

MC74AC02DT

D# MC74AC02DT

ON Semiconductor

- Bulk (Alt: MC74AC02DT)

0

MC74AC02DR2G

D# MC74AC02DR2G

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC T/R - Bulk (Alt: MC74AC02DR2G)

0
零件编号 制造商 描述 库存

MC74AC02DR2G

D# MC74AC02DR2G

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC T/R (Alt: MC74AC02DR2G)

0
零件编号 制造商 描述 库存

MC74AC02DTR2G

D# MC74AC02DTR2G

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin TSSOP T/R (Alt: MC74AC02DTR2G)

0

MC74AC02DG

D# MC74AC02DG

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC Rail (Alt: MC74AC02DG)

0

MC74AC02DR2G

D# MC74AC02DR2G

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC T/R (Alt: MC74AC02DR2G)

0
零件编号 制造商 描述 库存

MC74AC02D

ON Semiconductor

356

MC74AC02DTR2

ON Semiconductor

720

MC74AC02DG

ON Semiconductor

6

MC74AC02DR2

ON Semiconductor

5470
零件编号 制造商 描述 库存

MC74AC02DTR2G

ON Semiconductor

LOG CMOS GATE NOR QUAD - Tape and Reel

0

MC74AC02D

ON Semiconductor

Min Qty 12

5725

MC74AC02DTR2

ON Semiconductor

LOG CMOS GATE NOR QUAD - Tape and Reel

0

MC74AC02DG

ON Semiconductor

IC, QUAD NOR GATE, 2I/P, SOIC-14

1471

MC74AC02DR2G

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC N T/R

2500

MC74AC02DR2

ON Semiconductor

Min Qty 12

5725
零件编号 制造商 描述 库存

MC74AC02DR2G

ON Semiconductor

NOR Gate SOIC-14_150mil 74 Series RoHS

2383
零件编号 制造商 描述 库存

MC74AC02DTR2G

D# MC74AC02DTR2GOSTR-ND

ON Semiconductor

IC GATE NOR 4CH 2-INP 14TSSOP

0

MC74AC02D

D# 2156-MC74AC02D-ON-ND

Rochester Electronics LLC

IC GATE NOR 4CH 2-INP 14SOIC

24915

MC74AC02DTR2

D# 2156-MC74AC02DTR2-ONTR-ND

Rochester Electronics LLC

IC GATE NOR 4CH 2-INP 14TSSOP

125000

MC74AC02DG

D# MC74AC02DGOS-ND

ON Semiconductor

IC GATE NOR 4CH 2-INP 14SOIC

869

MC74AC02DT

D# 2156-MC74AC02DT-ND

Rochester Electronics LLC

IC GATE NOR 4CH 2-INP 14-TSSOP

11458

MC74AC02DR2G

D# MC74AC02DR2GOSCT-ND

ON Semiconductor

IC GATE NOR 4CH 2-INP 14SOIC

4556

MC74AC02DR2

D# MC74AC02DR2OSTR-ND

ON Semiconductor

IC GATE NOR 4CH 2-INP 14SOIC

0
零件编号 制造商 描述 库存

MC74AC02DTR2

ON Semiconductor

In stock shipping within 2days

350

MC74AC02DG

ON Semiconductor

In stock shipping within 2days

4270

MC74AC02DR2

ON Semiconductor

In stock shipping within 2days

400
零件编号 制造商 描述 库存

MC74AC02DTR2G

D# 2534393RL

ON Semiconductor

NOR GATE, QUAD, 2 I/P, TSSOP-14

RoHS: Compliant
Min Qty: 5
Container: Reel
0

MC74AC02DG

D# 2534672

ON Semiconductor

NOR GATE, QUAD, 2 I/P, SOIC-14

RoHS: Compliant
Min Qty: 5
Container: Each
91

MC74AC02DR2G

D# 2534392

ON Semiconductor

NOR GATE, QUAD, 2 I/P, SOIC-14

RoHS: Compliant
Min Qty: 5
Container: Cut Tape
1586
零件编号 制造商 描述 库存

MC74AC02DTR2G

ON Semiconductor

Quad 2-input NOR Gate - TSSOP−14 package

RoHS: Compliant
pbFree: Yes
2500

MC74AC02DG

ON Semiconductor

MC74AC02 Series 2 to 6 V Quad 2-Input NOR Gate - SOIC-14

RoHS: Compliant
pbFree: Yes
3795

MC74AC02DR2G

ON Semiconductor

MC74AC02 Series 2 to 6 V Quad 2-Input NOR Gate - SOIC-14

RoHS: Compliant
pbFree: Yes
7500
零件编号 制造商 描述 库存

MC74AC02DTR2G

ON Semiconductor

OEM/CM QUOTES ONLY | NO BROKERS

20300

MC74AC02D

ON SEMICONDUCTOR

OEM/CM QUOTES ONLY | NO BROKERS

62356

MC74AC02DTR2

Rochester Electronics LLC

OEM/CM QUOTES ONLY | NO BROKERS

145000

MC74AC02DG

ON Semiconductor

OEM/CM QUOTES ONLY | NO BROKERS

8294

MC74AC02DT

Rochester Electronics LLC

OEM/CM QUOTES ONLY | NO BROKERS

13291

MC74AC02DR

Motorola Semiconductor Products

OEM/CM QUOTES ONLY | NO BROKERS

2320

MC74AC02DR2G

ON Semiconductor

OEM/CM QUOTES ONLY | NO BROKERS

21457

MC74AC02DR2

Motorola Semiconductor Products

OEM/CM QUOTES ONLY | NO BROKERS

27495

MC74AC02DW

Motorola Semiconductor Products

OEM/CM QUOTES ONLY | NO BROKERS

1007
零件编号 制造商 描述 库存

MC74AC02DTR2

ON Semiconductor

In Stock

720
零件编号 制造商 描述 库存

MC74AC02DR2G

D# C233451

ON Semiconductor

2383
零件编号 制造商 描述 库存

MC74AC02DTR2

ON Semiconductor

OEM/CM Immediate delivery

250

MC74AC02DG

ON Semiconductor

OEM/CM Immediate delivery

1326

MC74AC02DR2

Motorola Semiconductor Products

OEM/CM Immediate delivery

8000
零件编号 制造商 描述 库存

MC74AC02DTR2G

D# 863-MC74AC02DTR2G

ON Semiconductor

Logic Gates 2-6V Quad 2-Input NOR

RoHS: Compliant
6561

MC74AC02DG

D# 863-MC74AC02DG

ON Semiconductor

Logic Gates 2-6V Quad 2-Input NOR

RoHS: Compliant
1530
零件编号 制造商 描述 库存

MC74AC02DTR2G

D# XSFP00000203958

ON SEMICONDUCTOR

5000

MC74AC02DG

D# XSFP00000148758

ON SEMICONDUCTOR

MC74AC02 Series 2 to 6 V Quad 2-Input NOR Gate - SOIC-14

3025

MC74AC02DR2G

D# XSFP00000087802

ON SEMICONDUCTOR

MC74AC02 Series 2 to 6 V Quad 2-Input NOR Gate - SOIC-14

11231
零件编号 制造商 描述 库存

MC74AC02DTR2G.

D# 27AC8699

ON Semiconductor

Logic Function:NOR Gate, No. of Elements:Quad, No. of Inputs:2Inputs, No. of Pins:14Pins, Logic Case Style:TSSOP, Product Range:74AC02, Logic IC Family:74AC, Supply Voltage Min:2V, Supply Voltage Max:6V, Output Current:- RoHS Compliant: Yes

RoHS: Compliant
Min Qty: 5000
Container: TAPE & REEL - FULL
0

MC74AC02DTR2G

D# 81Y6616

ON Semiconductor

NOR GATE, QUAD, 2 I/P, TSSOP-14, Logic Family / Base Number:74AC02, Logic Type:NOR, Output Current:-, No. of Inputs:2, Supply Voltage Min:2V, Supply Voltage Max:6V, Logic Case Style:TSSOP, No. of Pins:14Pins, Logic IC Family:74AC, RoHS Compliant: Yes

RoHS: Compliant
Min Qty: 5
Container: Cut Tape
2125

MC74AC02DG

D# 71J5560

ON Semiconductor

QUAD NOR GATE, 2I/P, SOIC-14, Logic Function:NOR Gate, No. of Elements:Quad, No. of Inputs:2Inputs, No. of Pins:14Pins, Logic Case Style:SOIC, Product Range:74AC02, Logic IC Family:74AC, Supply Voltage Min:2V, Supply Voltage Max:6V RoHS Compliant: Yes

RoHS: Compliant
Min Qty: 1
Container: Bulk
2843

MC74AC02DR2G

D# 81Y6615

ON Semiconductor

NOR GATE, QUAD, 2 I/P, SOIC-14, Logic Family / Base Number:74AC02, Logic Type:NOR, Output Current:-, No. of Inputs:2, Supply Voltage Min:2V, Supply Voltage Max:6V, Logic Case Style:SOIC, No. of Pins:14Pins, Logic IC Family:74AC, RoHS Compliant: Yes

RoHS: Compliant
Min Qty: 5
Container: Cut Tape
1291
零件编号 制造商 描述 库存

MC74AC02DTEL

D# NS-MC74AC02DTEL

ON Semiconductor

OEM/CM ONLY

5025

MC74AC02DTR2G

D# NS-MC74AC02DTR2G

ON Semiconductor

OEM/CM ONLY

5735

MC74AC02D

D# NS-MC74AC02D

ON Semiconductor

OEM/CM ONLY

3141

MC74AC02DTR2

D# NS-MC74AC02DTR2

ON Semiconductor

OEM/CM ONLY

5116

MC74AC02DG

D# NS-MC74AC02DG

ON Semiconductor

OEM/CM ONLY

3677

MC74AC02DT

D# NS-MC74AC02DT

ON Semiconductor

OEM/CM ONLY

1812

MC74AC02DR2G

D# NS-MC74AC02DR2G

ON Semiconductor

OEM/CM ONLY

2641

MC74AC02DR2

D# NS-MC74AC02DR2

ON Semiconductor

OEM/CM ONLY

3669

MC74AC02-D

D# NS-MC74AC02-D

ON Semiconductor

OEM/CM ONLY

1656
零件编号 制造商 描述 库存

MC74AC02DTR2G

ON Semiconductor

1867

MC74AC02D

Motorola Semiconductor Products

Logic Circuit, Quad 2-Input NOR, AC-CMOS, 14 Pin, Plastic, SOP

766

MC74AC02DR2

ON Semiconductor

Logic Circuit, Quad 2-Input NOR, AC-CMOS, 14 Pin, Plastic, SOP

2400
零件编号 制造商 描述 库存

MC74AC02D

D# MC74AC02D

Motorola Semiconductor Products

Semiconductor

2041

MC74AC02DR2

D# MC74AC02DR2

Motorola Semiconductor Products

Semiconductor

9744
零件编号 制造商 描述 库存

MC74AC02DG

D# 1844266

ON Semiconductor

ON Semiconductor MC74AC02DG, Quad 2-Input NOR Schmitt Trigger Logic Gate, 14-Pin SOIC, TU

Min Qty: 55
Container: Tube
3960

MC74AC02DR2G

D# 8062138P

ON Semiconductor

ON Semiconductor MC74AC02DR2G, Quad 2-Input NOR Logic Gate, 14-Pin SOIC, RL

Min Qty: 50
Container: Reel
1700
零件编号 制造商 描述 库存

MC74AC02DTR2G

ON Semiconductor

NOR Gate, AC Series, 4-Func, 2-Input, CMOS, PDSO14

RoHS: Compliant
10897

MC74AC02D

ON Semiconductor

NOR Gate, AC Series, 4-Func, 2-Input, CMOS, PDSO14

RoHS: Not Compliant
24915

MC74AC02DTR2

ON Semiconductor

NOR Gate, AC Series, 4-Func, 2-Input, CMOS, PDSO14

RoHS: Compliant
125000

MC74AC02DG

ON Semiconductor

NOR Gate, AC Series, 4-Func, 2-Input, CMOS, PDSO14

RoHS: Compliant
13740

MC74AC02DT

ON Semiconductor

IC GATE NOR 4CH 2-INP 14-TSSOP

RoHS: Compliant
11458

MC74AC02DR2G

ON Semiconductor

NOR Gate, AC Series, 4-Func, 2-Input, CMOS, PDSO14

RoHS: Compliant
19536
零件编号 制造商 描述 库存

MC74AC02DTR2G

ON Semiconductor

OEM/CM ONLY

27516

MC74AC02D

ON Semiconductor

OEM/CM ONLY

58737

MC74AC02DTR2

ON Semiconductor

OEM/CM ONLY

3178

MC74AC02DG

ON Semiconductor

OEM/CM ONLY

7001

MC74AC02DR

Motorola Semiconductor Products

OEM/CM ONLY

2016

MC74AC02DR2G

ON Semiconductor

OEM/CM ONLY

28299

MC74AC02DR2

Motorola Semiconductor Products

OEM/CM ONLY

105739

MC74AC02DW

Motorola Semiconductor Products

OEM/CM ONLY

884
零件编号 制造商 描述 库存

MC74AC02DTR2

ON Semiconductor

IN stock Immediate delivery

245

MC74AC02DG

ON Semiconductor

IN stock Immediate delivery

1341

MC74AC02DR2

MOTO

IN stock Immediate delivery

8015
零件编号 制造商 描述 库存

MC74AC02DR2G

ON Semiconductor

shipping today

4999

MC74AC02DR2

Motorola Mobility LLC

shipping today

473
零件编号 制造商 描述 库存

MC74AC02DG

D# 30280628

ON Semiconductor

NOR Gate 4-Element 2-IN CMOS 14-Pin SOIC N Tube

RoHS: Compliant
0
零件编号 制造商 描述 库存

MC74AC02D

mfr

RFQ

3922

MC74AC02DGOS

ON Semiconductor

RFQ

3752
零件编号 制造商 描述 库存

MC74AC02DG

ON Semiconductor

Quad 2−, Input NOR Gate

3400
零件编号 制造商 描述 库存

MC74AC02DTR2G

D# 2534393

ON Semiconductor

NOR GATE, QUAD, 2 I/P, TSSOP-14

RoHS: Compliant
Min Qty: 1
Container: Cut Tape
2125

MC74AC02DG

D# 2534672

ON Semiconductor

NOR GATE, QUAD, 2 I/P, SOIC-14

RoHS: Compliant
Min Qty: 1
Container: Each
0

MC74AC02DR2G

D# 2534392

ON Semiconductor

NOR GATE, QUAD, 2 I/P, SOIC-14

RoHS: Compliant
Min Qty: 1
Container: Cut Tape
1276

Quick Inquiry

MC74AC02D

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 MC74AC02D 的问题吗?

MC74AC02D QRCode

扫描以查看此页面

推荐产品

ATB2012-50011-T000

XFRMR BALUN RF 40-860MHZ SMD

MAX815TESA+T

IC SUPERVISOR MPU LP 8SOIC

MC33174DG

IC OPAMP GP 1.8MHZ 14SOIC

ATMEGA32U2-AU

IC MCU 8BIT 32KB FLASH 32TQFP

MCP4921T-E/SN

IC DAC 12BIT SNGL W/SPI 8SOIC

M41T00SM6F

IC RTC CLK/CALENDAR I2C 8-SOIC

DA14585-00ATDEVKT-B

BT5.0 BASIC KIT

B5B-PH-K-S(LF)(SN)

CONN HEADER PH TOP 5POS 2MM

HCPL-060L-000E

OPTOISO 3.75KV OPN COLLECTOR 8SO

LT6350HMS8#PBF

IC DIFF CONVERT/ADC DRIVER 8MSOP

更多 »

MC74AC02D Tags

  • MC74AC02D
  • MC74AC02D PDF
  • MC74AC02D 数据表
  • MC74AC02D 规格
  • MC74AC02D 图片
  • ON Semiconductor
  • ON Semiconductor MC74AC02D
  • 买 MC74AC02D
  • MC74AC02D 价格
  • MC74AC02D 经销商
  • MC74AC02D 供应商
  • MC74AC02D 批发

MC74AC02D可用于