[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-671560-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-671560-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","555-timer-datasheet-precision-timers","555 Timer Datasheet - Precision Timers","","555 precision timers provide accurate timing delays or free-running oscillation across microseconds to hours, supporting astable and monostable operation with an adjustable duty cycle. Output is TTL-compatible for 5 V supplies and can sink or source up to 200 mA. Timing intervals are set by external resistor/capacitor networks, with threshold/trigger levels derived from VCC and override via RESET. Includes device information by package type, plus a simplified schematic and revision history.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/technology/","Technology",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/555-timer-datasheet-precision-timers/671560/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/555-timer-datasheet-precision-timers/671560.png","ImageObject",300,407,{"name":42,"@type":43},"Hazel","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-02","2026-11-01",true,{"@type":52,"interactionType":53,"userInteractionCount":26},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What timing modes does the xx555 timer support?","Question",{"text":62,"@type":63},"It supports astable operation for frequency/duty-cycle control and monostable (time-delay) operation using a single external resistor/capacitor network.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"How are threshold and trigger levels determined?",{"text":67,"@type":63},"The threshold and trigger levels are normally two-thirds and one-third of VCC, and can be changed via the control-voltage terminal.",{"name":69,"@type":60,"acceptedAnswer":70},"What does the RESET input do?",{"text":71,"@type":63},"When RESET goes low, it overrides other inputs by resetting the flip-flop and forcing the output low, initiating a new timing cycle.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},671560,1793577248,{"code":4,"msg":81,"data":82},"success",[83,87,91,95,100,104,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":92,"show_sort_weight":93,"slug":94},"Exam",70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":102,"slug":103},6,50,"technology",{"id":105,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},7,"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":96,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":101,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":26,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":139,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":79,"read_time":144},137441390410,"https://ap-avatar.wpscdn.com/avatar/2000252f4ab5702993?_k=1776741390130283984","xx555 Precision Timers  \n1 Features 3 Description  \n• Timing From Microseconds to Hours  \n• Astable or Monostable Operation  \n• Adjustable Duty Cycle  \n• TTL-Compatible Output Can Sink or Source Up to 200 mA  \n• On Products Compliant to MIL-PRF-38535, All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.  \n2 Applications  \n• Fingerprint Biometrics  \n• Iris Biometrics  \n• RFID Reader  \nThese devices are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or mono-stable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the a-stable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor.  \nThe threshold and trigger levels normally are twothirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flipflop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.  \nThe output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs.  \nDevice Information(1)  \n\n| PART NUMBER | PACKAGE | BODY SIZE (NOM) |\n| --- | --- | --- |\n| xx555 | PDIP (8) | 9.81 mm × 6.35 mm |\n|  | SOP (8) | 6.20 mm × 5.30 mm |\n|  | TSSOP (8) | 3.00 mm × 4.40 mm |\n|  | SOIC (8) | 4.90 mm × 3.91 mm |\n\n(1) For all available packages, see the orderable addendum atthe end of the datasheet.  \n4 Simplified Schematic  \nAn IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.  \nNA555, NE555, SA555, SE555  \nSLFS022I –SEPTEMBER 1973–REVISED SEPTEMBER 2014  \n[www.ti.com](www.ti.com)  \n\n| Table of Contents |  |  |\n| --- | --- | --- |\n| 1 Features ..................................................................\u003Cbr>2 Applications ...........................................................\u003Cbr>3 Description .............................................................\u003Cbr>4 Simplified Schematic.............................................\u003Cbr>5 Revision History.....................................................\u003Cbr>6 Pin Configuration and Functions .........................\u003Cbr>7 Specifications.........................................................\u003Cbr>7.1 Absolute Maximum Ratings .....................................\u003Cbr>7.2 Handling Ratings .......................................................\u003Cbr>7.3 Recommended Operating Conditions .......................\u003Cbr>7.4 Electrical Characteristics ...........................................\u003Cbr>7.5 Operating Characteristics..........................................\u003Cbr>7.6 Typical Characteristics ..............................................\u003Cbr>8 Detailed Description .............................................. | 1\u003Cbr>1\u003Cbr>1\u003Cbr>1\u003Cbr>2 3\u003Cbr>4\u003Cbr>4\u003Cbr>4\u003Cbr>4\u003Cbr>56\u003Cbr>7\u003Cbr>9 | 8.1 Overview ................................................................... 9\u003Cbr>8.2 Functional Block Diagram ......................................... 9\u003Cbr>8.3 Feature Description ................................................... 9\u003Cbr>8.4 Device Functional Modes........................................ 12\u003Cbr>9 Applications and Implementation ...................... 13\u003Cbr>9.1 Application Information...........","cbCaikboXeLBBcWR","https://ap.wps.com/l/cbCaikboXeLBBcWR","pdf",1320387,34,"English","# Features\n# Applications\n# Description\n# Simplified Schematic\n# Revision History\n# Pin Configuration and Functions\n# Specifications\n## Absolute Maximum Ratings\n## Handling Ratings\n## Recommended Operating Conditions\n## Electrical Characteristics\n## Operating Characteristics\n## Typical Characteristics\n# Detailed Description\n## Overview\n## Functional Block Diagram\n## Feature Description\n## Device Functional Modes\n# Applications and Implementation\n## Application Information\n## Typical Applications\n# Power Supply Recommendations\n# Device and Documentation Support\n## Related Links\n## Trademarks\n## Electrostatic Discharge Caution\n## Glossary\n# Mechanical, Packaging, and Orderable Information","[{\"question\":\"What timing modes does the xx555 timer support?\",\"answer\":\"It supports astable operation for frequency/duty-cycle control and monostable (time-delay) operation using a single external resistor/capacitor network.\"},{\"question\":\"How are threshold and trigger levels determined?\",\"answer\":\"The threshold and trigger levels are normally two-thirds and one-third of VCC, and can be changed via the control-voltage terminal.\"},{\"question\":\"What does the RESET input do?\",\"answer\":\"When RESET goes low, it overrides other inputs by resetting the flip-flop and forcing the output low, initiating a new timing cycle.\"}]","555 Timer Datasheet - Precision Timers | PDF",86]