Datasheet

NE556, SA556, SE556
DUAL PRECISION TIMERS
SLFS023E – APRIL 1978 – REVISED OCTOBER 2000
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
MIN MAX UNIT
Su
pp
ly voltage V
CC
NE556, SA556 4.5 16
V
S
u
ppl
y v
oltage
,
V
CC
SE556 4.5 18
V
Input voltage (CONT, RESET, THRES, and TRIG), V
I
V
CC
V
Output current, I
O
±200 mA
NE556 0 70
Operating free-air temperature, T
A
SA556 –40 85
°C
SE556 –55 125
electrical characteristics, V
CC
= 5 V to 15 V, T
A
= 25°C (unless otherwise noted)
PARAMETER TEST CONDITIONS
NE556
SA556
SE556
UNIT
MIN TYP MAX MIN TYP MAX
V
T
Threshold voltage level
V
CC
= 15 V 8.8 10 11.2 9.4 10 10.6
V
V
T
Threshold
v
oltage
le
v
el
V
CC
= 5 V 2.4 3.3 4.2 2.7 3.3 4
V
I
T
Threshold current
(see Note 3)
30 250 30 250 nA
V
CC
=15V
4.5 5 5.6 4.8 5 5.2
V
TRIG
Trigger voltage level
V
CC
=
15
V
T
A
= –55°C to 125°C 3 6
V
V
TRIG
Trigger
v
oltage
le
v
el
V
CC
=5V
1.1 1.67 2.2 1.45 1.67 1.9
V
V
CC
=
5
V
T
A
= –55°C to 125°C 1.9
I
TRIG
Trigger current TRIG at 0 V 0.5 2 0.5 0.9 µA
V
RESET
Reset voltage level
0.3 0.7 1 0.3 0.7 1
V
V
RESET
Reset
v
oltage
le
v
el
T
A
= –55°C to 125°C 1.1
V
I
RESET
Reset current
RESET at V
CC
0.1 0.4 0.1 0.4
mA
I
RESET
Reset
c
u
rrent
RESET at 0 V –0.4 1.5 –0.4 –1
mA
I
DISCH
Discharge switch
off-state current
20 100 20 100 nA
V
CC
=15V
9 10 11 9.6 10 10.4
V
CONT
Control voltage
V
CC
=
15
V
T
A
= –55°C to 125°C 9.6 10.4
V
V
CONT
g
(open circuit)
V
CC
=5V
2.6 3.3 4 2.9 3.3 3.8
V
V
CC
=
5
V
T
A
= –55°C to 125°C 2.9 3.8
NOTE 3: This parameter influences the maximum value of the timing resistors R
A
and R
B
in the circuit of Figure 1. For example, when V
CC
= 5 V,
the maximum value is R = R
A
+ R
B
≈ 3.4 MΩ, and for V
CC
= 15 V, the maximum value is ≈ 10 MΩ.