Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsN/A Case type DIP8 Type (misc.) Precision timer Case type DIP8 Type (misc.) Precis

NE555, NE555Y, SA555, SE555, SE555C

PRECISION TIMERS

SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Timing From Microseconds to Hours

Astable or Monostable Operation

Adjustable Duty Cycle

TTL-Compatible Output Can Sink or

Source up to 200 mA

Designed To Be Interchangeable With

Signetics NE555, SA555, SE555, and

SE555C

SE555C FROM TI IS NOT RECOMMENDED

FOR NEW DESIGNS

description

These devices are precision monolithic timing

circuits capable of producing accurate time delays

or oscillation. In the time-delay or monostable

mode of operation, the timed interval is controlled

by a single external resistor and capacitor

network. In the astable mode of operation, the

frequency and duty cycle can be controlled

independently with two external resistors and a

single external capacitor.

The threshold and trigger levels normally are two-thirds and one-third, respectively, of V

. 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 flip-flop is reset and the output is low. RESET 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 DISCH and ground.

The 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.

The NE555 is characterized for operation from 0°C to 70°C. The SA555 is characterized for operation from

–40°C to 85°C. The SE555 and SE555C are characterized for operation over the full military range of –55°C

to 125°C.

AVAILABLE OPTIONS

PACKAGE

CHIP FORM

THRES

MAX

= 15 V

SMALL OUTLINE

(D)

CHIP CARRIER

(FK)

CERAMIC DIP

(JG)

PLASTIC DIP

(P)

CHIP

FORM

(Y)

0°C to 70°C 11.2 V NE555D NE555P

–40°C to 85°C 11.2 V SA555D SA555P

NE555Y

–55°C to 125°C

10.6 V

11.2 V

SE555D

SE555CD

SE555FK

SE555CFK

SE555JG

SE555CJG

SE555P

SE555CP

NE555Y

The D package also is available taped and reeled. Add the suffix R to the device type (e.g., NE555DR).

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

GND

TRIG

OUT

RESET

DISCH

THRES

CONT

D, JG, OR P PACKAGE

(TOP VIEW)

32120 19

910111213

DISCH

THRES

TRIG

OUT

FK PACKAGE

(TOP VIEW)

GND

CONT

VCC

RESET

NC–No internal connection

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.

Summary of content (15 pages)

PAGE 1
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 D D D D D D, JG, OR P PACKAGE (TOP VIEW) Timing From Microseconds to Hours Astable or Monostable Operation Adjustable Duty Cycle TTL-Compatible Output Can Sink or Source up to 200 mA Designed To Be Interchangeable With Signetics NE555, SA555, SE555, and SE555C GND TRIG OUT RESET 1 8 2 7 3 6 4 5 VCC DISCH THRES CONT FK PACKAGE (TOP VIEW) NC GND NC VCC NC SE555C FROM TI IS NOT RECOMMENDED FO
PAGE 2
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 RESET TRIGGER VOLTAGE† FUNCTION TABLE THRESHOLD VOLTAGE† OUTPUT DISCHARGE SWITCH Low Irrelevant Irrelevant Low On High <1/3 VDD Irrelevant High Off High >1/3 VDD >2/3 VDD Low On High >1/3 VDD † Voltage levels shown are nominal.
PAGE 3
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING TA = 85°C POWER RATING TA = 125°C POWER RATING FK 1375 mW 11.0 mW/°C 880 mW 715 mW 275 mW JG (SE555, SE555C) 1050 mW 8.4 mW/°C 672 mW 546 mW 210 mW JG (SA555, NE555C) 825 mW 6.
PAGE 4
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 electrical characteristics, VCC = 5 V to 15 V, TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN THRES voltage level VCC = 15 V VCC = 5 V TYP MAX MIN 9.4 10 10.6 2.7 3.3 4 30 250 5 5.2 THRES current (see Note 3) 4.8 VCC = 15 V TA = –55°C to 125°C TRIG voltage level TRIG current RESET voltage level RESET current 3 1.45 VCC = 5 V 0.
PAGE 5
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 operating characteristics, VCC = 5 V and 15 V PARAMETER MIN Initial error of timing interval‡ Each timer, monostable§ Each timer, astable¶ TA = 25°C Temperature coefficient of timing interval Each timer, monostable§ Each timer, astable¶ TA = MIN to MAX Supply-voltage y g sensitivity y of timing interval Each timer, monostable§ Each timer, astable¶ TA = 25°C Output-pulse rise time Output-pulse f
PAGE 6
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 electrical characteristics, VCC = 5 V to 15 V, TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS NE555Y MIN TYP MAX UNIT VCC = 15 V VCC = 5 V 8.8 10 11.2 2.4 3.3 4.2 30 250 TRIG voltage level VCC = 15 V VCC = 5 V 4.5 5 5.6 1.1 1.67 2.2 TRIG current TRIG at 0 V 0.5 2 µA 0.7 1 V 0.1 0.4 – 0.4 – 1.
PAGE 7
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 TYPICAL CHARACTERISTICS† LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 4 2 1 0.7 0.4 ÏÏÏÏ ÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ ÏÏÏÏ 10 7 VCC = 5 V TA = – 55°C TA = 25°C ÏÏÏÏ TA = 125°C 0.2 0.1 0.07 0.04 VOL – Low-Level Output Voltage – V VOL – Low-Level Output Voltage – V 10 7 LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 0.02 VCC = 10 V 4 2 TA = 25°C 1 0.
PAGE 8
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 TYPICAL CHARACTERISTICS† NORMALIZED OUTPUT PULSE DURATION (MONOSTABLE OPERATION) vs SUPPLY VOLTAGE SUPPLY CURRENT vs SUPPLY VOLTAGE Pulse Duration Relative to Value at VCC = 10 V 10 Output Low, No Load 9 I CC – Supply Current – mA 8 TA = 25°C 7 6 5 TA = –55°C 4 TA = 125°C 3 2 1 0 1.015 1.010 1.005 1 0.995 0.990 0.
PAGE 9
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 APPLICATION INFORMATION monostable operation For monostable operation, any of these timers can be connected as shown in Figure 9. If the output is low, application of a negative-going pulse to TRIG sets the flip-flop (Q goes low), drives the output high, and turns off Q1. Capacitor C then is charged through RA until the voltage across the capacitor reaches the threshold voltage of THRES input.
PAGE 10
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 APPLICATION INFORMATION astable operation As shown in Figure 12, adding a second resistor, RB, to the circuit of Figure 9 and connecting the trigger input to the threshold input causes the timer to self-trigger and run as a multivibrator. The capacitor C charges through RA and RB and then discharges through RB only. Therefore, the duty cycle is controlled by the values of RA and RB.
PAGE 11
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 APPLICATION INFORMATION Figure 13 shows typical waveforms generated during astable operation. The output high-level duration tH and low-level duration tL can be calculated as follows: 100 k + 0.693 (RA ) RB) C H t + 0.693 (R C L B) RA + 2 RB = 1 kΩ f – Free-Running Frequency – Hz t Other useful relationships are shown below. + tH ) tL + 0.693 (RA ) 2RB) C 1.
PAGE 12
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 APPLICATION INFORMATION frequency divider By adjusting the length of the timing cycle, the basic circuit of Figure 9 can be made to operate as a frequency divider. Figure 17 shows a divide-by-three circuit that makes use of the fact that retriggering cannot occur during the timing cycle. ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ ÏÏÏÏÏ Voltage – 2 V/div VCC = 5 V RA = 1250 Ω C = 0.
PAGE 13
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 APPLICATION INFORMATION VCC (5 V to 15 V) 2 Clock Input RL 8 RESET VCC OUT TRIG 5 CONT RA Modulation Input Voltage 3 Output 7 DISCH Modulation Input (see Note A) RA = 3 kΩ C = 0.
PAGE 14
NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS SLFS022A – SEPTEMBER 1973 – REVISED SEPTEMBER 2000 APPLICATION INFORMATION sequential timer VCC 4 RESET 2 8 VCC OUT TRIG S DISCH 5 0.01 µF CONT 4 RESET RA 33 kΩ 3 2 0.001 µF 7 1 6 TRIG CONT 0.01 µF CA CA = 10 µF RA = 100 kΩ Output A RB THRES GND 1 CB 4 RESET 33 kΩ 3 2 0.001 µF DISCH 7 5 THRES GND 8 VCC OUT 0.01 µF Output B CB = 4.7 µF RB = 100 kΩ TRIG DISCH 5 6 8 VCC OUT CONT THRES GND 1 RC 3 7 6 CC CC = 14.
PAGE 15
IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete.