NE556, SA556, SE556
DUAL PRECISION TIMERS
SLFS023C – APRIL 1978 – REVISED DECEMBER 1999
recommended operating conditions
MIN
4.5
MAX
16
UNIT
NE556, SA556
SE556
Supply voltage, V
V
CC
4.5
18
Input voltage (CONT, RESET, THRES, and TRIG), V
V
CC
V
I
Output current, I
±200
70
mA
O
NE556
SA556
SE556
0
–40
–55
Operating free-air temperature, T
85
°C
A
125
electrical characteristics, V
= 5 V to 15 V, T = 25°C (unless otherwise noted)
CC
A
NE556, SA556
SE556
TYP
10
PARAMETER
TEST CONDITIONS
UNIT
MIN
8.8
TYP
10
MAX
11.2
4.2
250
5.6
2.2
2
MIN
9.4
MAX
10.6
4
V
V
= 15 V
= 5 V
CC
V
T
Threshold voltage level
V
nA
V
2.4
3.3
30
2.7
3.3
CC
I
T
Threshold current (see Note 3)
Trigger voltage level
30
250
5.2
1.9
0.9
1
V
V
= 15 V
= 5 V
4.5
1.1
5
4.8
5
CC
V
TRIG
TRIG
1.67
0.5
0.7
0.1
–0.4
1.45
1.67
0.5
CC
I
Trigger current
TRIG at 0 V
µA
V
Reset voltage level
0.3
1
0.3
0.7
V
RESET
RESET at V
0.4
1.5
0.1
0.4
–1
CC
I
I
Reset current
mA
nA
V
RESET
RESET at 0 V
–0.4
Discharge switch off-state
current
20
100
20
100
DISCH
V
V
= 15 V
= 5 V
9
10
3.3
0.1
0.4
2
11
4
9.6
2.9
10
3.3
0.1
0.4
2
10.4
3.8
CC
V
Control voltage (open circuit)
Low-level output voltage
CONT
2.6
CC
I
I
I
I
I
I
I
I
I
= 10 mA
= 50 mA
= 100 mA
= 200 mA
= 5 mA
0.25
0.75
2.5
0.15
0.5
OL
OL
OL
OL
OL
OL
OH
OH
OH
V
= 15 V
= 5 V
CC
CC
2.2
V
OL
V
2.5
0.1
0.15
13.3
12.5
3.3
20
2.5
0.1
0.15
13.3
12.5
3.3
20
0.25
0.3
0.15
0.25
V
= 8 mA
= –100 mA 12.75
= –200 mA
13
3
V
V
= 15 V
= 5 V
CC
V
OH
High-level output voltage
Supply current
V
= –100 mA
= 15 V
= 5 V
2.75
CC
V
V
V
V
30
12
26
10
24
10
20
8
Output low,
No Load
CC
CC
CC
CC
mA
nA
6
6
I
CC
= 15 V
= 5 V
18
18
Output high,
No load
4
4
NOTE 3: This parameter influences the maximum value of the timing resistors R and R in the circuit of Figure 1. For example, when
A
B
V
CC
= 5 V, the maximum value is R = R + R ≈ 3.4 MΩ, and for V
= 15 V, the maximum value is ≈ 10 MΩ.
CC
A
B
3
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