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SN74LS123
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Parameters

Technical/Catalog InformationSN74LS123D
VendorTexas Instruments
CategoryIntegrated Circuits (ICs)
Logic TypeMonostable
Independent Circuits2
Voltage - Supply4.75 V ~ 5.25 V
Mounting TypeSurface Mount
Package / Case16-SOIC (3.9mm Width)
PackagingTube
Operating Temperature0°C ~ 70°C
Propagation Delay28ns
Current - Output High, Low400A, 8mA
Schmitt Trigger InputNo
Drawing Number296; 4040047-4; D; 16
Lead Free StatusLead Free
RoHS StatusRoHS Compliant
Other Names SN74LS123D
SN74LS123D
296 1635 5 ND
29616355ND
296-1635-5

Product Manufacturers Pack D/C
SN74LS123 - - -

Pinout/Connection Diagram

sn74ls123 Circuit
In machine and equipment design, some applications require measurement of both the shaft speed and the direction of rotation. Fig. 56-4 shows the circuit of a tachometer, which also indicates the direction of rotation. The flywheel has two magnets embedded in the outer rim about 45° apart. One magnet has the north pole toward the outside and the other magnet has the south pole toward the outside rim of the flywheel. Because of the magnet spacing, a short on pulse is produced by the TL3101 in one direction and a long on pulse in the other direction. A 0-50 μA meter is used to monitor the flywheel speed while the LEDs indicate the direction of rotation. The direction-of-rotation circuit can be divided into three parts:

· TLC372 device for input conditioning and reference adjustment.
· Two 2N2222 transistors which apply the VCC to the two LEDs when needed.
· The two TTL 220 LEDs which indicate clockwise (CW) or counterclockwise (CCW) direction of rotation.

Supplier

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  Part Number Mfg Pack D/C Qty Note
SN74LS123 TI CDIP 10+ 5512
  E-core Electronics Co. China (Mainland)
Contact: Mr. Eric   MSN:ecore-ic@hotmail.com Tel: +86-754-89970968 Fax: +86-754-89970567
SN74LS123 TI DIP 89 212 Real Stock . We are STRC member.
  Win Source Electronic Technology Limited Hong Kong
Contact: Ms. Amanda   MSN:winsource3@hotmail.com Tel: 86-755-83566469 Fax: 86-755-83957728
SN74LS123 TI SOP 91 40 New and original
  OneNew(HK)Electronics Co.,Ltd China (Mainland)
Contact: Mr. Bill   MSN:bill12124@gmail.com Tel: 86-0755-83987701 Fax: 86-0755-83987726
SN74LS123 280055
  BST INT'L ELECTRONIC(HK) CO., LIMITED Hong Kong
Contact: Ms. Tina   MSN:tina-bst@live.cn Tel: 00-852-30504229 Fax: 00-852-30691955
SN74LS123 5000
  HK Truly Electronics Tech Co.,LTD China (Mainland)
Contact: Ms. Candy   MSN:sarryx@hotmail.com Tel: 86-755-33071327 Fax: 86-755-83011657
SN74LS123 SOP 1550
  Dong Yu yuan Electronic Limited China (Mainland)
Contact: Mr. Yang   MSN:Stevenyoung0012@hotmail.com Tel: 86-754-84471271 Skype:dongyuyuan2008 Fax: 86-754-84471271 ACCEPT SMALL ORDER
SN74LS123 TI 32000 SOP-16
  Crystal holding Electronic Co., Limited China (Mainland)
Contact: Mr. Li   MSN:crystaldz99@hotmail.com Tel: 86-755-83245210 Fax:
SN74LS123 SOP 1550 ICQ#426661950,http://99ictrade.taobao.com/
  HongKong 99IC Trade Co.,Ltd. China (Mainland)
Contact: Ms. Wenggie Weng   MSN:w99ic@hotmail.com Tel: 86-755-83253970 Fax: 86-755-82500640
SN74LS123 TI 488 CDIP
  HK XINYUE ELECTRONICS CO.,LIMITE  China (Mainland)
Contact: Mr. Edward   MSN:zh10086@hotmail.com Tel: +86-0755-82815026 Fax: +86-0755-83996795
SN74LS123 TI SOP 03+ 800 new and original part instock
  Goldensand Electronic Co., Ltd China (Mainland)
Contact: Mr. sam   MSN:goldensand2@hotmail.com Tel: 86-0755-83286526 Fax: 86-0755-82539822
SN74LS123 TI CDIP N/A 300
  SHUANGZHI(HK)CO.,LTD Hong Kong
Contact: Mr. chan   MSN:leochan64588@msn.cn MSN:zimingchan@msn.cn Tel: 86-0755-82794881 Fax: 86-0755-82794836
SN74LS123 MOT ROHS 10+ 10000 New&original
  Ao Yue (HK) Electronics Trading Co., Ltd China (Mainland)
Contact: Mr. Max Lee   MSN:Aoyue-ics@hotmail.com Tel: 0086-0754-89972682 Fax: 0086-0754-89972616
SN74LS123 TI CDIP 05+ 480
  Universal Technical Components Limited China (Mainland)
Contact: Ms. Amy   MSN:amy-840308@hotmail.com Tel: 0086-027-83083551 Fax: 0086-027-83083551
SN74LS123 TI CDIP 488
  SHENZHEN TINBO OPTOELECTRONICS CO.,LTD China (Mainland)
Contact: Mr. Eric He   MSN:tbgeric@hotmail.com Tel: +86-755-83995390 Fax: +86-755-88363122
SN74LS123 TI SOP 97 965
  ICCN Electronic Technology Co.,Ltd China (Mainland)
Contact: Mr. sucrechow   MSN:iccn-1@hotmail.com Tel: 86-0755-83250080 Fax: 86-0755-83251007
SN74LS123 TI 488 CDIP
  Centerchip Technology co.,Ltd China (Mainland)
Contact: Ms. lisa huang   MSN:lisa_ccic@hotmail.com Tel: 86-755-83958497 Fax: 86-755-83958504
SN74LS123 TI CDIP N/A 371
  Bosson Electronics(HK)CO.,LIMITED China (Mainland)
Contact: Ms. Lucky   MSN:bosson_ic@hotmail.com Tel: 86-755-83215115 Fax: 86-755-83378029
SN74LS123 TI DIP N/A 50PCS
  Aosiwei Commercial & Trade Co., Ltd. China (Mainland)
Contact: Ms. Sophia   MSN:aosi@vip.163.com Tel: 86-755-83019442 Fax: 86-755-83019443
SN74LS123 TI 97+ 965 SOP-16
  STARS SYSTEM LIMITED China (Mainland)
Contact: Ms. Angel   MSN:angel.hkstars.syatem@hotmail.com Tel: 86-0755-82500770 Fax: 86-0755-82500550
SN74LS123 480 TI CDIP
  Anduo Components Co.,Ltd China (Mainland)
Contact: Ms. Susan Zhao   MSN:susan@anduocomp.com Tel: 86-10-58816651 Fax: 86-10-58816652
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PDF / Datasheet

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SN74LS123

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