NE555, NE555Y, SA555, SE555, SE555C
PRECISION TIMERS
SLFS022 SEPTEMBER 1973 REVISED FEBRUARY 1992
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Timing From Microseconds to Hours
D
Astable or Monostable Operation
D
Adjustable Duty Cycle
D
TTL-Compatible Output Can Sink or
Source up to 200 mA
D
Functionally Interchangeable With the
Signetics NE555, SA555, SE555, SE555C;
Have Same Pinout
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.
The threshold and trigger levels are normally two-thirds and one-third, respectively, of V
CC
. 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
PACKAGE
CHIP FORM
TA
VTHRES max
VCC = 15 V
SMALL OUTLINE
(D)
CHIP CARRIER
(FK)
CERAMIC DIP
(J)
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 is available taped and reeled. Add the suffix R to the device type (e.g., NE555DR).
Copyright
1992, Texas Instruments Incorporated
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.
1
2
3
4
8
7
6
5
GND
TRIG
OUT
RESET
V
CC
DISCH
THRES
CONT
D, JG, OR P PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
NC
DISCH
NC
THRES
NC
NC
TRIG
NC
OUT
NC
FK PACKAGE
(TOP VIEW)
NC
GND
NC
CONT
NC
VCC
NC
NC
RESET
NC
NCNo internal connection
NE555, NE555Y, SA555, SE555, SE555C
PRECISION TIMERS
SLFS022 SEPTEMBER 1973 REVISED FEBRUARY 1992
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
RESET
TRIGGER VOLTAGE
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
< 2/3 VDD
As previously established
Voltage levels shown are nominal.
functional block diagram
1
R
R
S
R
R1
TRIG
THRES
R
VCC
CONT
RESET
OUT
DISCH
GND
RESET can override TRIG, which can override THRES.
Pin numbers shown are for the D, JG, and P packages only.
4
8
5
6
2
1
7
3
NE555, NE555Y, SA555, SE555, SE555C
PRECISION TIMERS
SLFS022 SEPTEMBER 1973 REVISED FEBRUARY 1992
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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.
GND
RESET
(4)
CONT
VCC
(8)
1
THRES
TRIG
R
R
R
DISCH
OUT
S
R
R1
CHIP THICKNESS: 15 TYPICAL
BONDING PADS: 4
4 MINIMUM
TJ max = 150
C
TOLERANCES ARE
10%
ALL DIMENSIONS ARE IN MILS
PIN (1) INTERNALLY CONNECTED
TO BACKSIDE OF CHIP
(5)
(6)
(2)
(1)
(7)
(3)
BONDING PAD ASSIGNMENTS
41
42
(1)
(2)
(3)
(4)
(8)
(7)
(6)
(5)
NE555, NE555Y, SA555, SE555, SE555C
PRECISION TIMERS
SLFS022 SEPTEMBER 1973 REVISED FEBRUARY 1992
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
CC
(See Note 1)
18 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage (CONT, RESET, THRES, and TRIG)
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current
225 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total dissipation
See Dissipation Rating Table
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: NE555
0
C to 70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SA555 40
C to 85
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SE555, SE555C
55
C to 125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Case temperature for 60 seconds: FK package
260
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P package
260
C
. . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: JG package
300
C
. . . . . . . . . . . . . . . . . . . .
NOTE 1: All voltage values are with respect to network ground terminal.
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
D
725 mW
5.8 mW/
C
464 mW
377 mW
N/A
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
6.6 mW/
C
528 mW
429 mW
N/A
P
1000 mW
8.0 mW/
C
640 mW
520 mW
N/A
recommended operating conditions
NE555
SA555
SE555
SE555C
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
Supply voltage, VCC
4.5
16
4.5
16
4.5
18
4.5
16
V
Input voltage (CONT, RESET, THRES, and TRIG)
VCC
VCC
VCC
VCC
V
Output current
200
200
200
200
mA
Operating free-air temperature, TA
0
70
40
85
55
125
55
125
C
NE555, NE555Y, SA555, SE555, SE555C
PRECISION TIMERS
SLFS022 SEPTEMBER 1973 REVISED FEBRUARY 1992
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics, V
CC
= 5 V to 15 V, T
A
= 25
C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SE555
NE555, SA555,
SE555C
UNIT
MIN
TYP
MAX
MIN
TYP
MAX
THRES voltage level
VCC = 15 V
9.4
10
10.6
8.8
10
11.2
V
THRES voltage level
VCC = 5 V
2.7
3.3
4
2.4
3.3
4.2
V
THRES current (see Note 2)
30
250
30
250
nA
TRIG voltage level
VCC = 15 V
4.8
5
5.2
4.5
5
5.6
V
TRIG voltage level
VCC = 5 V
1.45
1.67
1.9
1.1
1.67
2.2
V
TRIG current
TRIG at 0 V
0.5
0.9
0.5
2
A
RESET voltage level
0.3
0.7
1
0.3
0.7
1
V
RESET current
RESET at VCC
0.1
0.4
0.1
0.4
mA
RESET current
RESET at 0 V
0.4
1
0.4
1.5
mA
DISCH switch off-state current
20
100
20
100
nA
CONT voltage (open circuit)
VCC = 15 V
9.6
10
10.4
9
10
11
V
CONT voltage (open circuit)
VCC = 5 V
2.9
3.3
3.8
2.6
3.3
4
V
IOL = 10 mA
0.1
0.15
0.1
0.25
VCC = 15 V
IOL = 50 mA
0.4
0.5
0.4
0.75
Low level output voltage
VCC = 15 V
IOL = 100 mA
2
2.2
2
2.5
V
Low-level output voltage
IOL = 200 mA
2.5
2.5
V
VCC = 5 V
IOL = 5 mA
0.1
0.2
0.1
0.35
VCC = 5 V
IOL = 8 mA
0.15
0.25
0.15
0.4
VCC = 15 V
IOH = 100 mA
13
13.3
12.75
13.3
High-level output voltage
VCC = 15 V
IOH = 200 mA
12.5
12.5
V
VCC = 5 V
IOH = 100 mA
3
3.3
2.75
3.3
Output low
No load
VCC = 15 V
10
12
10
15
Supply current
Output low,
No load
VCC = 5 V
3
5
3
6
mA
Supply current
Output high
No load
VCC = 15 V
9
10
9
13
mA
Output high,
No load
VCC = 5 V
2
4
2
5
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 M
, and for VCC = 15 V, the maximum value is 10 M
.
operating characteristics, V
CC
= 5 V and 15 V
PARAMETER
TEST
CONDITIONS
SE555
NE555, SA555,
SE555C
UNIT
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
Initial error of timing interval
Each timer, monostable
TA = 25
C
0.5%
1.5%
1%
3%
Initial error of timing interval
Each timer, astable
TA = 25
C
1.5%
2.25%
Temperature coefficient
Each timer, monostable
TA = MIN to MAX
30
100
50
ppm/
C
of timing interval
Each timer, astable
TA = MIN to MAX
90
150
ppm/
C
Supply voltage sensitivity
Each timer, monostable
TA = 25
C
0.05
0.2
0.1
0.5
%/V
y
g
y
of timing interval
Each timer, astable
TA = 25
C
0.15
0.3
%/V
Output pulse rise time
CL = 15 pF,
100
200
100
300
ns
Output pulse fall time
L
,
TA = 25
C
100
200
100
300
ns
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
Timing 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: RA = 2 k
to 100 k
, C = 0.1
F.
Values specified are for a device in an astable circuit similar to Figure 12, with component values as follow: RA = 1 k
to 100 k
, C = 0.1
F.
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