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Technical content

Features

 Low turn off time  Maximum operating frequency greater than 500KHz  Timing from microseconds to hours  Operates in both astable and monostable modes  High output current can source or sink 200mA  Adjustable duty cycle  TTL compatible  Temperature stability of 0.005% per℃

Description

The SC556 dual monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For a stable operation as an oscillator, the free running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200mA. Order Codes Pin Connections(top view) 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: 7 8

14 VccDischarge

Part Number Temperature Range Package N D SC556 0℃, 70℃ · ·

深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC556 系列(文件编号：S&CIC0813) 第 2 页 共 10 页 Block Diagram 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: Vcc+ Threshold Control Voltage Trigger Reset Inhibit /Reset S Q R Comp Comp 5KΩ 5KΩ 5KΩ Out Discharge Schematic Diagram 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: Vcc+ COM P ATOR THRESHOLD VOLTAG E CONTRO L OUTP UT THRESHOLD TRIGGER RES ET DISCHARGE GND 1 Q2 Q3 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 Q19 Q20 Q21 Q22 Q23 Q24 R1 R2 R3 R4 R5 R6 R7 R10 R11 R12 R13 R14 R15R16 R17 4.7KΩ 4.7KΩ 4.7KΩ 4.7KΩ 830Ω 1KΩ 5KΩ 6.8KΩ 220Ω 100Ω 3.9KΩ 100KΩ 100KΩ10KΩ 5KΩ 5KΩ 5KΩ D1

深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC556 系列(文件编号：S&CIC0813) 第 3 页 共 10 页 Absolute Maximum Ratings Symbol Parameter Value Unit Vcc Supply Voltage 18 V Toper Operating Free Air Temperature Range For SC556 0 to 70 ℃ Tj Junction Temperature 150 ℃ Tstg Storage Temperature Range -65 to 150 ℃ Operating Conditions Symbol Parameter SC556A Unit Vcc Supply Voltage 4.5 to 18 V Vth, Vtrig, Vcl, Vreset Maximum Input Voltage Vcc V Electrical Characteristics Tamb = + 25℃, Vcc = + 5V to + 15V(unless otherwise specified) Symbol Parameter SC556 Unit Min. Typ. Max. Icc Supply Current(RL ∞) (-note 1) - (2 timers) Low State Vcc = + 5V Vcc = + 15V High State Vcc = 5V -- 1 2 mA -- 3 6 mA -- 4 -- mA Timing Error (monostable) (RA = 2k to 100kΩ,C = 0.1uF) Initial Accuracy – (note 2) Drift with Temperature Drift with Supply Voltage -- 1 3 % -- 50 -- ppm/℃ -- 0.1 0.5 %/V Timing Error (astable) (RA, RB = 1kΩ to100kΩ, C = 0.1uF,Vcc = + 15V) Initial Accuracy – (note 2) Drift with Temperature Drift with Supply Voltage -- 2.25 -- % -- 150 -- ppm/℃ -- 0.3 -- %/V VcL Control Voltage Level Vcc = + 15V Vcc = + 5V 9 10 11 V 2.6 3.33 4 V Vth Threshold Voltage Vcc = + 15V Vcc = + 5V 8.8 10 11.2 V 2.4 3.33 4.2 V Ith Threshold Current – (note 3) -- 0.1 0.25 uA Vtrig Threshold Voltage Vcc = + 15V Vcc = + 5V 4.5 5 5.6 V 1.1 1.67 2.2 V Itrig Threshold Current (Vtig = 0V) -- 0.5 2.0 uA Vreset Reset Voltage – (note 4) -- 2.5 -- V Ireset Reset Current Vreset = + 0.4V Vreset = 0V -- 0.1 0.4 mA -- 0.4 1.5 mA

深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC556 系列(文件编号：S&CIC0813) 第 4 页 共 10 页 VoL Low Level Output Voltage Vcc = + 15V, IO(sink) = 10mA IO(sink) = 50mA IO(sink) = 100mA IO(sink) = 200mA Vcc = + 5V, IO(sink) = 8mA IO(sink) = 5mA -- 0.1 0.25 V -- 0.4 0.75 V -- 2 2.5 V -- 2.5 -- V -- 0.2 0.4 V -- 0.15 0.25 V VOH High Level Output Voltage Vcc = + 15v, IO(source) = 200mA IO(source) = 100mA Vcc = + 5v, IO(source) = 100mA -- 12.5 -- V 12.75 13.3 -- V 2.75 3.3 -- V Notes: 1. Supply current when output is high is typically 1mA less. 2. Tested at Vcc = + 5V and Vcc = + 15V. 3. This wilt determine the maximum value of R A + RB for + 15V operation the max total is R = 20M Ω and for 5V operation the max total R = 3.5MΩ. 4. Specified with trigger input high, VDD=5V  Electrical Characteristics (continued) Symbol Parameter SC556 Unit Min. Typ. Max. Idis (off) Discharge Pin Leakage Current (output high) (Vdis = 10V) -- 20 100 nA Vdis (sat) Discharge pin Saturation Voltage (output low) – (note 5 ) Vcc = + 15V, Idis = 15mA Vcc = + 5V, Idis = 4.5mA -- 180 480 mA -- 80 200 mA tr Output Rise Time -- 100 300 Ns tr Output Fall Time -- 100 300 Ns Toff Turn off Time – (note 6 ) (Vreset = Vcc) -- 0.5 -- us Notes: 1. No protection against excessive Pin 7 current is necessary, providing the pack age dissipation rating will not be exceeded. 2. Time measured from a positive going input pulse from 0 to 0.8x Vcc into the threshold to the drop from high to low of the output trigger is tied to threshold.

深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC556 系列(文件编号：S&CIC0813) 第 5 页 共 10 页

深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC556 系列(文件编号：S&CIC0813) 第 6 页 共 10 页

深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC556 系列(文件编号：S&CIC0813) 第 7 页 共 10 页 Typical Application 50% Duty Cycle Oscillator Pulse Width Modulator 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: Vcc Output 0 .0 1 uF 22KΩ Rs Ra 51KΩ C 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: t1 = 0.693 RA C. t R 2 A B A A A A B BB B RR R R RR R f ti /[ ]（ （ ）） CLn t1 t2 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: Vcc Output Ra C Trigger M ODULATION IN P UT

深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC556 系列(文件编号：S&CIC0813) 第 8 页 共 10 页 Tone Burst Generator For a tone burst generator the first timer is used as a monostable and determines the tone duration when triggered by a positive pulse at pin 6.The second timer is enabled by the high output os the monostable. It is connected as an astable and determines the frequency of the tone. 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: 14 15 +15V RA RB 0.01uF Ground Output ResetOutput Discharge Threshold Trigger Control 0.01uF Control Ground RL Trigger Trigger Discharge Threshold T f= 1.1 = 1.44AR C2R ）（ B+AR C1. Ground Astable Operation Monostable Operation 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: Vcc RL Output RL 0.01uF C RB RA f = 1.44 C2R ）（ B+AR Opera ting f requency 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: RA C 10uF RL RL Vcc Trigger Output T = 1.1 AR C1.

深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC556 系列(文件编号：S&CIC0813) 第 9 页 共 10 页 1 2 3 4 5 6 A B C D 654321 D C B A Title Nu mber Rev isio nSize B Date: 2 3-Apr-2 0 10 Sheet o f File: D:\\HMF\\电路图\\SC5 56 .d db Drawn By: t1 = 0.693 t1 = 0.693 RB ）（ A BRR + C Output High C Output High PACKAGE MECHANICAL DATA

14 PINS - PLASTIC DIP

Dimensions Millimeters Inches

深圳市富满电子有限公司 SHENZHEN FUMAN ELECTRONICS CO., LTD. SC556 系列(文件编号：S&CIC0813) 第 10 页 共 10 页

14 PINS - PLASTIC MICROPACKAGE (SO)

Dimensions Millimeters Inches c1 450 (typ.) S 80 (max)