Philips Semiconductors Linear Products
Product specification
Dual timer
NE/SA/SE556/NE556-1
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.
PIN CONFIGURATION
D, F, N Packages
DISCHARGE
THRESHOLD
CONTROL VOLTAGE
RESET
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
DISCHARGE
THRESHOLD
CONTROL VOLTAGE
RESET
OUTPUT
TRIGGER
FEATURES
•
Turn-off time less than 2µs (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
OUTPUT
TRIGGER
GND
•
Precision timing
•
Sequential timing
•
Pulse shaping
•
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
1
DISCHARGE
2
COMP
CONTROL VOLTAGE
RESET
3
4
COMP
11
10
RESET
CONTROL VOLTAGE
14
13
V
CC
DISCHARGE
THRESHOLD
12
THRESHOLD
FLIP FLOP
FLIP FLOP
OUTPUT
5
9
OUTPUT
TRIGGER
6
COMP
COMP
8
TRIGGER
GROUND
®
Touch-Tone
7
is a registered trademark of AT&T
August 31, 1994
353
853-0035 13721
Philips Semiconductors Linear Products
Product specification
Dual timer
NE/SA/SE556/NE556-1
EQUIVALENT SCHEMATIC
(Shown for one circuit only)
CONTROL VOLTAGE
V
CC
R1
4.7K
R2
330
R3
4.7K
R4
1K
R7
5K
R12
6.8K
Q5
Q6 Q7
Q8
Q9
Q19
Q21
Q22
R13
3.3K
THRESHOLD
Q1
Q2 Q3
Q4
R10
3.2
K
C
CB
Q18
E
OUTPUT
Q23
B
R5
10K
TRIGGER
Q10
Q25
Q11 Q12
Q13
R8
5K
R11
4.7K
Q17
Q16
Q20
R14
220
Q24
RESET
DISCHARGE
GND
Q14
Q15
R6
100K
R16
100
R9
5K
R15
4.7K
ORDERING INFORMATION
DESCRIPTION
14-Pin Plastic Small Outline (SO) Package
14-Pin Ceramic Dual In-Line Package (CERDIP)
14-Pin Plastic Dual In-Line Package (DIP)
14-Pin Ceramic Dual In-Line Package (CERDIP)
14-Pin Plastic Dual In-Line Package (DIP)
14-Pin Plastic Dual In-Line Package (DIP)
14-Pin Ceramic Dual In-Line Package (CERDIP)
14-Pin Plastic Dual In-Line Package (DIP)
TEMPERATURE RANGE
0 to +70°C
0 to +70°C
0 to +70°C
0 to +70°C
0 to +70°C
-40°C to +85°C
-55°C to +125°C
-55°C to +125°C
ORDER CODE
NE556D
NE556F
NE556N
NE556-1F
NE556-1N
SA556N
SE556F
SE556N
DWG #
0175D
0581B
0405B
0581B
0405B
0405B
0581B
0405B
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
CC
Supply voltage
NE/SA556, NE556-1
SE556
P
D
T
A
Maximum allowable power dissipation
1
Operating temperature range
NE556-1, NE556
SA556
SE556
T
STG
T
SOLD
Storage temperature range
Lead soldering temperature (10sec max)
0 to +70
-40 to +85
-55 to +125
-65 to +150
+300
°C
°C
°C
°C
°C
+16
+18
800
V
V
mW
PARAMETER
RATING
UNIT
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
August 31, 1994
354
Philips Semiconductors Linear Products
Product specification
Dual timer
NE/SA/SE556/NE556-1
ELECTRICAL CHARACTERISTICS
T
A
=25°C, V
CC
=+5V to +15V, unless otherwise specified.
SYMBOL
V
CC
I
CC
PARAMETER
Supply voltage
V
CC
=5V, R
L
=∞
Supply current (low state)
1
V
CC
=15V, R
L
=∞
Timing error (monostable)
t
M
∆t
M
/∆T
∆t
M
/∆V
S
t
A
∆t
A
/∆T
∆t
A
/∆V
S
V
C
Initial accuracy
2
Drift with temperature
Drift with supply voltage
Timing error (astable)
Initial
accuracy
2
Drift with temperature
Drift with supply voltage
Control voltage level
Threshold voltage
V
TH
V
CC
=5V
I
TH
V
TRIG
V
CC
=5V
I
TRIG
V
RESET
I
RESET
Trigger current
Reset
voltage
5
V
RESET
=0.4V
V
RESET
=0V
V
CC
=15V
Output voltage (low)
SE556
V
OL
NE/SA556
NE556-1
Output voltage (low)
I
SINK
=200mA
V
CC
=5V
I
SINK
=8mA
I
SINK
=5mA
V
CC
=15V
I
SOURCE
=200mA
V
OH
Output voltage (high)
I
SOURCE
=100mA
V
CC
=5V
I
SOURCE
=100mA
t
OFF
t
R
t
F
Turn-off time
6
NE556-1
Rise time of output
Fall time of output
Discharge leakage current
V
RESET
=V
CC
3.0
3.3
0.5
100
100
20
2.0
200
200
100
2.75
3.3
0.5
100
100
20
300
300
100
µs
ns
ns
nA
13.0
12.5
13.3
12.75
12.5
13.3
V
0.1
0.05
0.2
0.15
0.25
0.15
0.3
0.25
2.5
I
SINK
=100mA
I
SINK
=10mA
I
SINK
=50mA
0.1
0.4
2.0
0.15
0.5
2.25
2.0
2.0
2.5
V
3.2
2.5
0.1
0.4
0.25
0.75
V
Reset current
Reset current
V
TRIG
=0V
0.4
0.4
1.45
1.67
0.5
0.7
0.1
0.4
1.9
0.9
1.0
0.4
1.0
0.4
0.4
1.1
1.67
0.5
0.7
0.1
0.4
2.2
2.0
1.0
0.6
1.5
V
µA
V
mA
mA
Threshold current
3
Trigger voltage
V
CC
= 15V, V
TH
= 10.5V
V
CC
=15V
4.8
2.7
3.33
30
5.0
4.0
250
5.2
4.5
2.4
3.33
30
5.0
4.2
250
5.6
V
nA
V
V
CC
=15V
V
CC
=5V
V
CC
=15V
9.6
2.9
9.4
R
A
, R
B
=1kΩ to 100kΩ
C=0.µF
V
CC
=15V
4
400
0.15
10.0
3.33
10.0
6
500
0.6
10.4
3.8
10.6
9.0
2.6
8.8
5
400
0.3
10.0
3.33
10.0
13
500
1
11.0
4.0
11.2
%
ppm/°C
%/V
V
V
R
A
=2kΩ to 100kΩ
C=0.1µF
T=1.1 RC
0.5
30
0.05
2.0
100
0.2
0.75
50
0.1
3.0
150
0.5
%
ppm/°C
%/V
20
24
20
30
mA
TEST CONDITIONS
Min
4.5
6
SE556
Typ
Max
18
10
Min
4.5
6
NE/SA556
NE556-1
Typ
Max
16
12
V
mA
UNIT
August 31, 1994
355
Philips Semiconductors Linear Products
Product specification
Dual timer
NE/SA/SE556/NE556-1
ELECTRICAL CHARACTERISTICS
(Continued)
SYMBOL
PARAMETER
Matching characteristics
4
Initial accuracy
2
Drift with temperature
Drift with supply voltage
0.5
10
0.1
0.2
1.0
1.0
±10
0.2
0.5
2.0
%
ppm/°C
%/V
TEST CONDITIONS
Min
SE556/556-1
Typ
Max
NE/SA556/SE556C
NE556-1/SE556-1C
Min
Typ
Max
UNIT
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=10MΩ, and for 5V operation, the maximum total
R=3.4MΩ.
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 0.001µF coupling
capacitor sequential timing may be obtained. Delay t
1
is determined
by the first half and t
2
by the second half delay.
V
CC
V
CC
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
.
V
CC
V
CC
V
CC
R
1
10k
1M
4
1
10
14
12
13
2
.001
INPUT
C
1
1µF
6
7
11
.01
NOTE:
All resistor values are in
Ω.
3
.01
556
8
R
2
130k
10k
C
2
50µF
.001
5
9
OUTPUT 1
OUTPUT 2
Sequential Timer
August 31, 1994
356
Philips Semiconductors Linear Products
Product specification
Dual timer
NE/SA/SE556/NE556-1
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Pulse Width
Required for Triggering
150
MINIMUM PULSE WIDTH (ns)
SUPPLY CURRENT — mA
125
100
75
50
25
+125
o
C
0
0
0.1
0.2
0.3
0.4(XV
CC
)
0
5.0
–55
o
C
0
o
C
10.0
Supply Current
VS Supply Voltage
2.0
+125
o
C
VCC V OUT — VOLTS
8.0
+25
o
C
6.0
55
o
C
4.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
10.0
SUPPLY VOLTAGE — VOLTS
15.0
0
1.0
High Output Voltage Drop
vs Output Source Current
55
o
C
+25
o
C
+125
o
C
+25
o
C
+70
o
C
2.0
5V = V
CC
= 15V
2.0
5.0
10
20
50 100
LOWEST VOLTAGE LEVEL
OF TRIGGER PULSE
I
SOURCE
— mA
Low Output Voltage
vs Output Sink Current
10
V
CC
= 5V
10
Low Output Voltage
vs Output Sink Current
10
V
CC
= 10V
–55
o
C
VOUT — VOLTS
VOUT —VOLTS
Low Output Voltae
vs Output Sink Current
V
CC
= 15V
V
— VOLTS
OUT
1.0
55
o
C
1.0
+25
o
C
1.0
+25
o
C
+25
o
C
0.1
+125
o
C
–55
o
C
+125
o
C
0.1
+125
o
C
0.1
0.01
1.0
0.01
2.0
5.0
10
20
50 100
1.0
2.0
5.0
10
20
50
100
0.01
1.0
2.0
5.0
10
20
50 100
I
SINK
— mA
I
SINK
— mA
I
SINK
— mA
Delay Time
vs Temperature
1.015
NORMALIZED DELAY TIME
NORMALIZED DELAY TIME
1.010
1.005
1.000
0.995
0.990
0.985
–50
25
0 +25 +50 +75 +100 +125
TEMPERATURE —
o
C
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0
Delay Time
vs Supply Voltage
Propagation Delay vs Voltage
Level of Trigger Pulse
300
250
–55
o
C
PROPAGATION — ns
200
0
o
C
150
100
+25
o
C
+70
o
C
+125
o
C
50
0
5
10
15
20
0
0.1
0.2
0.3
0.4
SUPPLY VOLTAGE — V
LOWEST VOLTAGE LEVEL
OF TRIGGER PULSE — XV
CC
August 31, 1994
357
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