Datasheet NA555, NE555, SA555, SE555 (Texas Instruments) - 3

NA555, NE555, SA555, SE555 www.ti.com
SLFS022I – SEPTEMBER 1973 – REVISED SEPTEMBER 2014
6 Pin Configuration and Functions NA555...D OR P PACKAGE SE555...FK PACKAGE NE555...D, P, PS, OR PW PACKAGE (TOP VIEW) SA555...D OR P PACKAGE SE555...D, JG, OR P PACKAGE
CC
(TOP VIEW)
NC GND NC V NC GND 1 8 V 3 2 1 20 19 CC NC 4 18 NC TRIG 2 7 DISCH TRIG 5 17 DISCH OUT 3 6 THRES NC 6 16 NC RESET 4 5 CONT OUT 7 15 THRES NC 8 14 NC 9 10 11 12 13 NC NC NC CONT RESET NC – No internal connection
Pin Functions PIN D, P, PS, FK I/O DESCRIPTION PW, JG NAME NO.
Controls comparator thresholds, Outputs 2/3 VCC, allows bypass capacitor CONT 5 12 I/O connection DISCH 7 17 O Open collector output to discharge timing capacitor GND 1 2 – Ground 1, 3, 4, 6, 8, 9, 11, 13, NC – No internal connection 14, 16, 18, 19 OUT 3 7 O High current timer output signal RESET 4 10 I Active low reset input forces output and discharge low. THRES 6 15 I End of timing input. THRES > CONT sets output low and discharge low TRIG 2 5 I Start of timing input. TRIG < ½ CONT sets output high and discharge open VCC 8 20 – Input supply voltage, 4.5 V to 16 V. (SE555 maximum is 18 V) Copyright © 1973–2014, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: NA555 NE555 SA555 SE555 Document Outline 1 Features 2 Applications 3 Description 4 Simplified Schematic Table of Contents 5 Revision History 6 Pin Configuration and Functions 7 Specifications 7.1 Absolute Maximum Ratings 7.2 Handling Ratings 7.3 Recommended Operating Conditions 7.4 Electrical Characteristics 7.5 Operating Characteristics 7.6 Typical Characteristics 8 Detailed Description 8.1 Overview 8.2 Functional Block Diagram 8.3 Feature Description 8.3.1 Mono-stable Operation 8.3.2 A-stable Operation 8.3.3 Frequency Divider 8.4 Device Functional Modes 9 Applications and Implementation 9.1 Application Information 9.2 Typical Applications 9.2.1 Missing-Pulse Detector 9.2.1.1 Design Requirements 9.2.1.2 Detailed Design Procedure 9.2.1.3 Application Curves 9.2.2 Pulse-Width Modulation 9.2.2.1 Design Requirements 9.2.2.2 Detailed Design Procedure 9.2.2.3 Application Curves 9.2.3 Pulse-Position Modulation 9.2.3.1 Design Requirements 9.2.3.2 Detailed Design Procedure 9.2.3.3 Application Curves 9.2.4 Sequential Timer 9.2.4.1 Design Requirements 9.2.4.2 Detailed Design Procedure 9.2.4.3 Application Curves 10 Power Supply Recommendations 11 Device and Documentation Support 11.1 Related Links 11.2 Trademarks 11.3 Electrostatic Discharge Caution 11.4 Glossary 12 Mechanical, Packaging, and Orderable Information