NE555, NE555Y, SA555, SE555, SE555C PRECISION TIMERS
SLFS022 ± SEPTEMBER 1973 ± REVISED FEBRUARY 1992
DTiming From Microseconds to Hours
DAstable or Monostable Operation
DAdjustable Duty Cycle
DTTL-Compatible Output Can Sink or Source up to 200 mA
DFunctionally Interchangeable With the Signetics NE555, SA555, SE555, SE555C; Have Same Pinout
D, JG, OR P PACKAGE
(TOP VIEW)
GND |
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1 |
8 |
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VCC |
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TRIG |
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2 |
7 |
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DISCH |
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OUT |
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3 |
6 |
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THRES |
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RESET |
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4 |
5 |
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CONT |
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FK PACKAGE (TOP VIEW)
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 may be independently controlled with two external resistors and a single external capacitor.
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NC |
GND |
NC |
VCC |
NC |
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NC |
3 |
2 |
1 |
20 19 |
NC |
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4 |
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18 |
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TRIG |
5 |
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17 |
DISCH |
NC |
6 |
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16 |
NC |
OUT |
7 |
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15 |
THRES |
NC |
8 |
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14 |
NC |
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9 |
10 11 12 13 |
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NC |
RESET |
NC |
CONT |
NC |
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NC±No internal connection |
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The threshold and trigger levels are normally two-thirds 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 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. Whenever 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
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PACKAGE |
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CHIP FORM |
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TA |
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V |
THRES |
max |
SMALL OUTLINE |
CHIP CARRIER |
CERAMIC DIP |
PLASTIC DIP |
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(Y) |
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VCC = 15 V |
(D) |
(FK) |
(J) |
(P) |
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0°C to 70°C |
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11.2 V |
NE555D |
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NE555P |
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± 40°C to 85°C |
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11.2 V |
SA555D |
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SA555P |
NE555Y |
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± 55°C to 125°C |
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10.6 V |
SE555D |
SE555FK |
SE555JG |
SE555P |
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11.2 V |
SE555CD |
SE555CFK |
SE555CJG |
SE555CP |
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The D package 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.
Copyright 1992, Texas Instruments Incorporated
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
1 |
NE555, NE555Y, SA555, SE555, SE555C
PRECISION TIMERS
SLFS022 ± SEPTEMBER 1973 ± REVISED FEBRUARY 1992
FUNCTION TABLE
RESET |
TRIGGER VOLTAGE² |
THRESHOLD VOLTAGE² |
OUTPUT |
DISCHARGE SWITCH |
Low |
Irrelevant |
Irrelevant |
Low |
On |
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High |
< 1/3 VDD |
Irrelevant |
High |
Off |
High |
> 1/3 VDD |
> 2/3 VDD |
Low |
On |
High |
> 1/3 VDD |
< 2/3 VDD |
As previously established |
² Voltage levels shown are nominal.
functional block diagram
VCC |
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RESET |
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8 |
CONT |
4 |
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R |
5 |
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6 |
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R1 |
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THRES |
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3 |
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R |
1 |
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OUT |
S
R
2
TRIG
R
7
DISCH
1
RESET can override TRIG, which can override THRES.
Pin numbers shown are for the D, JG, and P packages only.
2 |
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
NE555, NE555Y, SA555, SE555, SE555C
PRECISION TIMERS
SLFS022 ± SEPTEMBER 1973 ± REVISED FEBRUARY 1992
chip information
These chips, properly assembled, display characteristics similar to the NE555 (see electrical table for NE555Y). Thermal compression or ultrasonic bonding may be used on the doped aluminum bonding pads. Chips may be mounted with conductive epoxy or a gold-silicon preform.
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BONDING PAD ASSIGNMENTS |
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CONT |
RESET |
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VCC |
(5) |
(4) |
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(8) |
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(6) |
R |
R1 |
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(2) |
THRES |
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(3) |
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R |
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(3) |
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1 |
OUT |
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(4) |
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S |
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R |
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TRIG |
(2) |
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R |
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(7) |
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DISCH |
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41 |
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(1) |
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(1) |
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GND |
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(5) |
(8) |
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CHIP THICKNESS: 15 TYPICAL |
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BONDING PADS: 4 × 4 MINIMUM |
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(6) |
(7) |
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TJ max = 150° C |
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TOLERANCES ARE ± 10% |
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42 |
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ALL DIMENSIONS ARE IN MILS |
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PIN (1) INTERNALLY CONNECTED |
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TO BACKSIDE OF CHIP |
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POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
3 |
NE555, NE555Y, SA555, SE555, SE555C
PRECISION TIMERS
SLFS022 ± SEPTEMBER 1973 ± REVISED FEBRUARY 1992
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (See Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . |
. . . . . . . . . . 18 V |
Input voltage (CONT, RESET, THRES, and TRIG) . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . |
. . . . . . . . . VCC |
Output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . |
. . . . . ± 225 mA |
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
See Dissipation Rating Table |
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Operating free-air temperature range: NE555 . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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. . 0°C to 70°C |
SA555 . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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±40°C to 85°C |
SE555, SE555C . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . |
±55°C to 125°C |
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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±65°C to 150°C |
Case temperature for 60 seconds: FK package . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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. . . . . . . 260°C |
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P package . . . . . . . . . . |
. . . . . . . 260°C |
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Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG package . |
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. . . . . . . 300°C |
NOTE 1: All voltage values are with respect to network ground terminal.
DISSIPATION RATING TABLE
PACKAGE |
TA ≤ 25°C |
DERATING FACTOR |
TA = 70°C |
TA = 85°C |
TA = 125°C |
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POWER RATING |
ABOVE TA = 25°C |
POWER RATING |
POWER RATING |
POWER RATING |
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D |
725 mW |
5.8 mW/°C |
464 mW |
377 mW |
N/A |
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FK |
1375 mW |
11.0 mW/°C |
880 mW |
715 mW |
275 mW |
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JG (SE555, SE555C) |
1050 mW |
8.4 mW/°C |
672 mW |
546 mW |
210 mW |
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JG (SA555, NE555C) |
825 mW |
6.6 mW/°C |
528 mW |
429 mW |
N/A |
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P |
1000 mW |
8.0 mW/°C |
640 mW |
520 mW |
N/A |
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recommended operating conditions
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NE555 |
SA555 |
SE555 |
SE555C |
UNIT |
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MIN |
MAX |
MIN |
MAX |
MIN |
MAX |
MIN |
MAX |
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Supply voltage, VCC |
4.5 |
16 |
4.5 |
16 |
4.5 |
18 |
4.5 |
16 |
V |
Input voltage (CONT, RESET, THRES, and TRIG) |
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VCC |
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VCC |
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VCC |
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VCC |
V |
Output current |
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± 200 |
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± 200 |
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± 200 |
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± 200 |
mA |
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Operating free-air temperature, TA |
0 |
70 |
± 40 |
85 |
± 55 |
125 |
± 55 |
125 |
°C |
4 |
POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
NE555, NE555Y, SA555, SE555, SE555C
PRECISION TIMERS
SLFS022 ± SEPTEMBER 1973 ± REVISED FEBRUARY 1992
electrical characteristics, VCC = 5 V to 15 V, TA = 25°C (unless otherwise noted)
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SE555 |
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NE555, SA555, |
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PARAMETER |
TEST CONDITIONS |
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SE555C |
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UNIT |
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MIN |
TYP |
MAX |
MIN |
TYP |
MAX |
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THRES voltage level |
VCC = 15 V |
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9.4 |
10 |
10.6 |
8.8 |
10 |
11.2 |
V |
VCC = 5 V |
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2.7 |
3.3 |
4 |
2.4 |
3.3 |
4.2 |
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THRES current (see Note 2) |
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30 |
250 |
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30 |
250 |
nA |
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TRIG voltage level |
VCC = 15 V |
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4.8 |
5 |
5.2 |
4.5 |
5 |
5.6 |
V |
VCC = 5 V |
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1.45 |
1.67 |
1.9 |
1.1 |
1.67 |
2.2 |
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TRIG current |
TRIG at 0 V |
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0.5 |
0.9 |
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0.5 |
2 |
µA |
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RESET voltage level |
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0.3 |
0.7 |
1 |
0.3 |
0.7 |
1 |
V |
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RESET current |
RESET at VCC |
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0.1 |
0.4 |
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0.1 |
0.4 |
mA |
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RESET at 0 V |
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± 0.4 |
± 1 |
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± 0.4 |
± 1.5 |
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DISCH switch off-state current |
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20 |
100 |
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20 |
100 |
nA |
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CONT voltage (open circuit) |
VCC = 15 V |
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9.6 |
10 |
10.4 |
9 |
10 |
11 |
V |
VCC = 5 V |
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2.9 |
3.3 |
3.8 |
2.6 |
3.3 |
4 |
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IOL = 10 mA |
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0.1 |
0.15 |
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0.1 |
0.25 |
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VCC = 15 V |
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IOL = 50 mA |
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0.4 |
0.5 |
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0.4 |
0.75 |
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Low-level output voltage |
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IOL = 100 mA |
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2 |
2.2 |
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2 |
2.5 |
V |
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IOL = 200 mA |
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2.5 |
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2.5 |
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VCC = 5 V |
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IOL = 5 mA |
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0.1 |
0.2 |
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0.1 |
0.35 |
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IOL = 8 mA |
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0.15 |
0.25 |
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0.15 |
0.4 |
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VCC = 15 V |
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IOH = ± 100 mA |
13 |
13.3 |
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12.75 |
13.3 |
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High-level output voltage |
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IOH = ± 200 mA |
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12.5 |
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12.5 |
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V |
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VCC = 5 V |
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IOH = ± 100 mA |
3 |
3.3 |
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2.75 |
3.3 |
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Output low, |
No load |
VCC = 15 V |
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10 |
12 |
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10 |
15 |
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Supply current |
VCC = 5 V |
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3 |
5 |
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3 |
6 |
mA |
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Output high, |
No load |
VCC = 15 V |
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9 |
10 |
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9 |
13 |
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VCC = 5 V |
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2 |
4 |
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2 |
5 |
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NOTE 2: This parameter influences the maximum value of the timing resistors RA and RB in the circuit of Figure 12. For example, when VCC = 5 V, the maximum value is R = RA + RB ≈ 3.4 MΩ, and for VCC = 15 V, the maximum value is 10 MΩ.
operating characteristics, VCC = 5 V and 15 V
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TEST |
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SE555 |
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NE555, SA555, |
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PARAMETER |
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SE555C |
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UNIT |
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CONDITIONS² |
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MIN |
TYP |
MAX |
MIN |
TYP |
MAX |
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Initial error of timing interval³ |
Each timer, monostable§ |
TA = 25°C |
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0.5% |
1.5% |
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1% |
3% |
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Each timer, astable¶ |
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1.5% |
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2.25% |
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Temperature coefficient |
Each timer, monostable§ |
TA = MIN to MAX |
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30 |
100 |
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50 |
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ppm/°C |
of timing interval |
Each timer, astable¶ |
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90 |
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150 |
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Supply voltage sensitivity |
Each timer, monostable§ |
TA = 25°C |
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0.05 |
0.2 |
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0.1 |
0.5 |
%/V |
of timing interval |
Each timer, astable¶ |
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0.15 |
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0.3 |
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Output pulse rise time |
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CL = 15 pF, |
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100 |
200 |
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100 |
300 |
ns |
Output pulse fall time |
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TA = 25°C |
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100 |
200 |
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100 |
300 |
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² For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
³Timing interval error is defined as the difference between the measured value and the average value of a random sample from each process run.
§ Values specified are for a device in a monostable circuit similar to Figure 9, with component values as follow: R = 2 kΩ to 100 kΩ, C = 0.1 µF. |
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¶ Values specified are for a device in an astable circuit similar to Figure 12, with component values as follow: RA = 1 kΩ to 100 kΩ, C = 0.1 |
µF. |
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POST OFFICE BOX 655303 •DALLAS, TEXAS 75265 |
5 |