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| LM556 LM556C Dual Timer February 1995 LM556 LM556C Dual Timer General Description The LM556 Dual timing circuit is a highly stable controller capable of producing accurate time delays or oscillation The 556 is a dual 555 Timing is provided by an external resistor and capacitor for each timing function The two timers operate independently of each other sharing only VCC and ground The circuits may be triggered and reset on falling waveforms The output structures may sink or source 200 mA Y Y Y Y Y Adjustable duty cycle Output can source or sink 200 mA Output and supply TTL compatible Temperature stability better than 0 005% per C Normally on and normally off output Applications Y Y Y Y Y Y Y Features Y Y Y Y Direct replacement for SE556 NE556 Timing from microseconds through hours Operates in both astable and monostable modes Replaces two 555 timers Precision timing Pulse generation Sequential timing Time delay generation Pulse width modulation Pulse position modulation Linear ramp generator Schematic Diagram TL H 7852 - 2 Connection Diagram Dual-In-Line and Small Outline Packages Order Number LM556J or LM556CJ See NS Package Number J14A Order Number LM556CM See NS Package Number M14A Order Number LM556CN See NS Package Number N14A TL H 7852 - 1 Top View C1995 National Semiconductor Corporation TL H 7852 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Power Dissipation (Note 1) LM556J LM556CJ LM556CN Operating Temperature Ranges LM556C LM556 a 18V Storage Temperature Range Soldering Information Dual-In-Line Package Soldering (10 seconds) Small Outline Package Vapor phase (60 seconds) Infrared (15 seconds) b 65 C to a 150 C 260 C 1785 mW 1620 mW 0 C to a 70 C b 55 C to a 125 C 215 C 220 C See AN-450 ``Surface Mounting Methods and Their Effect on Product Reliability'' for other methods of soldering surface mount devices Electrical Characteristics (TA e 25 C Parameter Supply Voltage Supply Current (Each Timer Section) Timing Error Monostable Initial Accuracy Drift with Temperature Accuracy over Temperature Drift with Supply Timing Error Astable Initial Accuracy Drift with Temperature Accuracy over Temperature Drift with Supply Trigger Voltage Trigger Current Reset Voltage Reset Current Threshold Current Control Voltage Level and Threshold Voltage Pin 1 13 Leakage Output High Pin 1 13 Sat Output Low Output Low (Note 4) VCC e 5V RL e % VCC e 15V RL e % (Low State) (Note 2) Conditions VCC e a 5V to a 15V unless otherwise specified) LM556 Min 45 3 10 Typ Max 18 5 11 Min 45 3 10 LM556C Typ Max 16 6 14 V mA mA Units RA e 1k to 100 kX C e 0 1 mF (Note 3) 05 30 15 0 05 15 90 25 0 15 48 1 45 5 1 67 01 04 05 01 52 19 05 1 04 01 250 10 4 38 100 240 100 9 26 04 45 1 25 0 75 50 15 01 2 25 150 30 0 30 5 1 67 02 05 01 0 03 10 3 33 1 180 80 55 20 10 1 06 01 250 11 4 100 300 200 % ppm C % %V % ppm C % %V V V mA V mA mA nA V V nA mV mV RA RB e 1k to 100 kX C e 0 1 mF (Note 3) VCC e 15V VCC e 5V VTH e V-Control (Note 5) VTH e 11 2V VCC e 15V VCC e 5V 96 29 0 03 10 3 33 1 (Note 6) VCC e 15V I e 15 mA VCC e 4 5V I e 4 5 mA 150 70 2 Electrical Characteristics (TA e 25 C Parameter Output Voltage Drop (Low) VCC e a 5V to a 15V unless otherwise specified) (Continued) LM556 Min Typ 01 04 2 25 01 12 5 13 3 33 100 100 Max 0 15 05 2 25 Min LM556C Typ 01 04 2 25 Max 0 25 0 75 2 75 V V V V V V V V V ns ns 20 05 % ppm C %V Units Conditions VCC e 15V ISINK e 10 mA ISINK e 50 mA ISINK e 100 mA ISINK e 200 mA VCC e 5V ISINK e 8 mA ISINK e 5 mA ISOURCE e 200 mA VCC e 15V ISOURCE e 100 mA VCC e 15V VCC e 5V 13 3 0 25 0 25 12 75 2 75 12 5 13 3 33 100 100 02 02 01 g10 0 35 Output Voltage Drop (High) Rise Time of Output Fall Time of Output Matching Characteristics Initial Timing Accuracy Timing Drift with Temperature Drift with Supply Voltage (Note 7) 0 05 g10 01 02 Note 1 For operating at elevated temperatures the device must be derated based on a a 150 C maximum junction temperature and a thermal resistance of 70 C W (Ceramic) 77 C W (Plastic DIP) and 110 C W (SO-14 Narrow) Note 2 Supply current when output high typically 1 mA less at VCC e 5V Note 3 Tested at VCC e 5V and VCC e 15V Note 4 As reset voltage lowers timing is inhibited and then the output goes low Note 5 This will determine the maximum value of RA a RB for 15V operation The maximum total (RA a RB) is 20 MX Note 6 No protection against excessive pin 1 13 current is necessary providing the package dissipation rating will not be exceeded Note 7 Matching characteristics refer to the difference between performance characteristics of each timer section Note 8 Refer to RETS556X drawing for specifications of military LM556J version 3 Typical Performance Characteristics Minimum Pulse Width Required for Triggering Supply Current vs Supply Voltage (Each Section) High Output Voltage vs Output Source Current Low Output Voltage vs Output Sink Current Low Output Voltage vs Output Sink Current Low Output Voltage vs Output Sink Current Output Propagation Delay vs Voltage Level of Trigger Pulse Output Propagation Delay vs Voltage Level of Trigger Pulse Discharge Transistor (Pin 1 13) Voltage vs Sink Current Discharge Transistor (Pin 1 13) Voltage vs Sink Current TL H 7852 - 3 4 Physical Dimensions inches (millimeters) Ceramic Dual-In-Line Package (J) Order Number LM556J or LM556CJ NS Package Number J14A S O Molded Package (M) Order Number LM556CM NS Package Number M14A 5 LM556 LM556C Dual Timer Physical Dimensions inches (millimeters) (Continued) Molded Dual-In-Line Package (N) Order Number LM556CN NS Package Number N14A LIFE SUPPORT POLICY NATIONAL'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or systems which (a) are intended for surgical implant into the body or (b) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user National Semiconductor Corporation 1111 West Bardin Road Arlington TX 76017 Tel 1(800) 272-9959 Fax 1(800) 737-7018 2 A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness National Semiconductor Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications |
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