Philips Semiconductors Linear Products
Product specification
NE/SA/SE556/NE556-1
Dual timer
353
August 31, 1994
853-0035 13721
DESCRIPTION
Both the 556 and 556-1 Dual Monolithic timing circuits are highly
stable controllers capable of producing accurate time delays or
oscillation. The 556 and 556-1 are 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 V
CC
and
ground. The circuits may be triggered and reset on falling
waveforms. The output structures may sink or source 200mA.
FEATURES
Turn-off time less than 2
s (556-1)
Maximum operating frequency >500kHz (556-1)
Timing from microseconds to hours
Replaces two 555 timers
Operates in both astable and monostable modes
High output current
Adjustable duty cycle
TTL compatible
Temperature stability of 0.005%/
C
SE556-1 compliant to MIL-STD or JAN
APPLICATIONS
Precision timing
Sequential timing
Pulse shaping
PIN CONFIGURATION
D, F, N Packages
1
2
3
4
5
6
7
8
14
13
12
11
10
9
DISCHARGE
THRESHOLD
CONTROL VOLTAGE
RESET
OUTPUT
TRIGGER
GND
VCC
DISCHARGE
THRESHOLD
CONTROL VOLTAGE
RESET
OUTPUT
TRIGGER
Pulse generator
Missing pulse detector
Tone burst generator
Pulse width modulation
Time delay generator
Frequency division
Touch-Tone
encoder
Industrial controls
Pulse position modulation
Appliance timing
Traffic light control
BLOCK DIAGRAM
DISCHARGE
THRESHOLD
CONTROL VOLTAGE
RESET
OUTPUT
TRIGGER
GROUND
VCC
DISCHARGE
THRESHOLD
CONTROL VOLTAGE
RESET
OUTPUT
TRIGGER
COMP
FLIP FLOP
COMP
COMP
FLIP FLOP
COMP
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Touch-Tone is a registered trademark of AT&T
Philips Semiconductors Linear Products
Product specification
NE/SA/SE556/NE556-1
Dual timer
August 31, 1994
354
EQUIVALENT SCHEMATIC
(Shown for one circuit only)
R3
4.7K
CB
Q18
E
R9
5K
R6
100K
VCC
R1
4.7K
R2
330
R4
1K
Q5
Q6 Q7
Q9
Q8
R7
5K
R12
6.8K
Q19
Q21
R13
3.3K
Q22
OUTPUT
Q23
C
B
Q20
R14
220
Q24
Q17
R11
4.7K
R10
3.2
K
Q16
R8
5K
Q15
Q11 Q12
Q10
Q13
R5
10K
R15
4.7K
R16
100
Q25
Q14
Q2 Q3
Q1
Q4
CONTROL VOLTAGE
THRESHOLD
TRIGGER
RESET
DISCHARGE
GND
ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE
ORDER CODE
DWG #
14-Pin Plastic Small Outline (SO) Package
0 to +70
C
NE556D
0175D
14-Pin Ceramic Dual In-Line Package (CERDIP)
0 to +70
C
NE556F
0581B
14-Pin Plastic Dual In-Line Package (DIP)
0 to +70
C
NE556N
0405B
14-Pin Ceramic Dual In-Line Package (CERDIP)
0 to +70
C
NE556-1F
0581B
14-Pin Plastic Dual In-Line Package (DIP)
0 to +70
C
NE556-1N
0405B
14-Pin Plastic Dual In-Line Package (DIP)
-40
C to +85
C
SA556N
0405B
14-Pin Ceramic Dual In-Line Package (CERDIP)
-55
C to +125
C
SE556F
0581B
14-Pin Plastic Dual In-Line Package (DIP)
-55
C to +125
C
SE556N
0405B
ABSOLUTE MAXIMUM RATINGS
SYMBOL
PARAMETER
RATING
UNIT
V
CC
Supply voltage
NE/SA556, NE556-1
+16
V
SE556
+18
V
P
D
Maximum allowable power dissipation
1
800
mW
T
A
Operating temperature range
NE556-1, NE556
0 to +70
C
SA556
-40 to +85
C
SE556
-55 to +125
C
T
STG
Storage temperature range
-65 to +150
C
T
SOLD
Lead soldering temperature (10sec max)
+300
C
NOTES:
1. The junction temperature must be kept below 125
C for the D package and below 150
C for the N and F packages. At ambient temperatures
above 25
C, where this limit would be exceeded, the Maximum Allowable Power Dissipation must be derated by the following:
D package 115
C/W
N package 80
C/W
F package 100
C/W
Philips Semiconductors Linear Products
Product specification
NE/SA/SE556/NE556-1
Dual timer
August 31, 1994
355
ELECTRICAL CHARACTERISTICS
T
A
=25
C, V
CC
=+5V to +15V, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
SE556
NE/SA556
NE556-1
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
Min
Typ
Max
Min
Typ
Max
UNIT
V
CC
Supply voltage
4.5
18
4.5
16
V
V
CC
=5V, R
L
=
6
10
6
12
mA
I
CC
Supply current (low state)
1
V
CC
=15V, R
L
=
20
24
20
30
mA
Timing error (monostable)
R
A
=2k
to 100k
t
M
Initial accuracy
2
C=0.1
F
0.5
2.0
0.75
3.0
%
t
M
/
T
Drift with temperature
T=1.1 RC
30
100
50
150
ppm/
C
t
M
/
V
S
Drift with supply voltage
0.05
0.2
0.1
0.5
%/V
Timing error (astable)
R
A
, R
B
=1k
to 100k
t
A
Initial accuracy
2
C=0.
F
4
6
5
13
%
t
A
/
T
Drift with temperature
V
CC
=15V
400
500
400
500
ppm/
C
t
A
/
V
S
Drift with supply voltage
0.15
0.6
0.3
1
%/V
V
C
Control voltage level
V
CC
=15V
9.6
10.0
10.4
9.0
10.0
11.0
V
V
C
Control voltage level
V
CC
=5V
2.9
3.33
3.8
2.6
3.33
4.0
V
Threshold voltage
V
CC
=15V
9.4
10.0
10.6
8.8
10.0
11.2
V
V
TH
V
CC
=5V
2.7
3.33
4.0
2.4
3.33
4.2
V
I
TH
Threshold current
3
V
CC
= 15V, V
TH
= 10.5V
30
250
30
250
nA
Trigger voltage
V
CC
=15V
4.8
5.0
5.2
4.5
5.0
5.6
V
V
TRIG
V
CC
=5V
1.45
1.67
1.9
1.1
1.67
2.2
V
I
TRIG
Trigger current
V
TRIG
=0V
0.5
0.9
0.5
2.0
A
V
RESET
Reset voltage
5
0.4
0.7
1.0
0.4
0.7
1.0
V
Reset current
V
RESET
=0.4V
0.4
0.1
0.4
0.4
0.1
0.6
mA
I
RESET
Reset current
V
RESET
=0V
0.4
1.0
0.4
1.5
mA
V
OL
Output voltage (low)
V
CC
=15V
V
V
OL
Output voltage (low)
I
SINK
=10mA
0.1
0.15
0.1
0.25
V
V
OL
I
SINK
=50mA
0.4
0.5
0.4
0.75
V
V
OL
SE556
2.0
2.25
V
V
OL
NE/SA556
I
SINK
=100mA
2.0
3.2
V
OL
NE556-1
2.0
2.5
Output voltage (low)
I
SINK
=200mA
2.5
2.5
V
V
CC
=5V
V
I
SINK
=8mA
0.1
0.2
0.25
0.3
V
I
SINK
=5mA
0.05
0.15
0.15
0.25
V
CC
=15V
V
I
SOURCE
=200mA
12.5
12.5
V
V
OH
Output voltage (high)
I
SOURCE
=100mA
13.0
13.3
12.75
13.3
V
V
CC
=5V
I
SOURCE
=100mA
3.0
3.3
2.75
3.3
t
OFF
Turn-off time
6
NE556-1
V
RESET
=V
CC
0.5
2.0
0.5
s
t
R
Rise time of output
100
200
100
300
ns
t
F
Fall time of output
100
200
100
300
ns
Discharge leakage current
20
100
20
100
nA
Philips Semiconductors Linear Products
Product specification
NE/SA/SE556/NE556-1
Dual timer
August 31, 1994
356
ELECTRICAL CHARACTERISTICS
(Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
SE556/556-1
NE/SA556/SE556C
NE556-1/SE556-1C
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
Min
Typ
Max
Min
Typ
Max
UNIT
Matching characteristics
4
Initial accuracy
2
0.5
1.0
1.0
2.0
%
Drift with temperature
10
10
ppm/
C
Drift with supply voltage
0.1
0.2
0.2
0.5
%/V
NOTES:
1. Supply current when output is high is typically 1.0mA less.
2. Tested at V
CC
=5V and V
CC
=15V.
3. This will determine maximum value of R
A
+R
B
. For 15V operation, the max total R=10M
, and for 5V operation, the maximum total
R=3.4M
.
4. Matching characteristics refer to the difference between performance characteristics for each timer section in the monostable mode.
5. Specified with trigger input high. In order to guarantee reset the voltage at reset pin must be less than or equal to 0.4V. To disable reset
function, the voltage at reset pin has to be greater than 1V.
6. Time measured from a positive-going input pulse from 0 to 0.4 V
CC
into the threshold to the drop from high to low of the output. Trigger is
tied to threshold.
TYPICAL APPLICATIONS
One feature of the dual timer is that by utilizing both halves it is
possible to obtain sequential timing. By connecting the output of the
first half to the input of the second half via a 0.001
F coupling
capacitor sequential timing may be obtained. Delay t
1
is determined
by the first half and t
2
by the second half delay.
The first half of the timer is started by momentarily connecting Pin 6
to ground. When it is timed out (determined by 1.1R
1
C
1
) the second
half begins. Its duration is determined by 1.1R
2
C
2
.
Sequential Timer
All resistor values are in
.
NOTE:
VCC
VCC
VCC
VCC
VCC
INPUT
OUTPUT 1
OUTPUT 2
50
F
10k
1M
1
2
6
7
11
3
9
5
8
13
12
14
10
4
556
.01
.001
C1
C2
R2
R1
.001
.01
1
F
10k
130k
Philips Semiconductors Linear Products
Product specification
NE/SA/SE556/NE556-1
Dual timer
August 31, 1994
357
TYPICAL PERFORMANCE CHARACTERISTICS
MINIMUM PULSE WIDTH (ns)
SUPPL
Y
CURRENT -- mA
V V -- VOL
TS
CC
OUT
V -- VOL
TS
OUT
V --VOL
TS
OUT
NORMALIZED DELA
Y
TIME
PROP
AGA
TION -- ns
V -- VOL
TS
OUT
VCC = 15V
10
1.0
0.1
0.01
1.0
2.0
5.0
10
20
50 100
ISINK -- mA
Supply Current
VS Supply Voltage
Minimum Pulse Width
Required for Triggering
150
125
100
75
50
25
0
0
0.1
0.2
0.3
0.4(XVCC)
LOWEST VOLTAGE LEVEL
OF TRIGGER PULSE
55
o
C
0
o
C
+25
o
C
+70
o
C
+125
o
C
10.0
8.0
6.0
4.0
2.0
0
5.0
10.0
15.0
+25
o
C
55
o
C
SUPPLY VOLTAGE -- VOLTS
+125
o
C
+25
o
C
55
o
C
5V = VCC = 15V
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1.0
2.0
5.0
10
20
50 100
ISOURCE -- mA
High Output Voltage Drop
vs Output Source Current
+125
o
C
55
o
C
+25
o
C
+125
o
C
VCC = 5V
10
1.0
0.1
0.01
1.0
2.0
5.0
10
20
50 100
ISINK -- mA
Low Output Voltage
vs Output Sink Current
55
o
C
+25
o
C
+125
o
C
+25
o
C
+125
o
C
55
o
C
VCC = 10V
Low Output Voltage
vs Output Sink Current
10
1.0
0.1
0.01
1.0
2.0
5.0
10
20
50
100
ISINK -- mA
+25
o
C
Low Output Voltae
vs Output Sink Current
1.015
1.010
1.005
1.000
0.995
0.990
0.985
50
25
0
+25 +50 +75 +100 +125
TEMPERATURE --
o
C
Delay Time
vs Temperature
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0
5
10
15
20
SUPPLY VOLTAGE -- V
Delay Time
vs Supply Voltage
300
250
200
150
100
50
0
0
0.1
0.2
0.3
0.4
Propagation Delay vs Voltage
Level of Trigger Pulse
+70
o
C
LOWEST VOLTAGE LEVEL
OF TRIGGER PULSE -- XVCC
+125
o
C
55
o
C
0
o
C
NORMALIZED DELA
Y
TIME
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