LM3905N National Semiconductor, LM3905N Datasheet - Page 2

• Manufacturer Part Number: LM3905N
• Description: IC TIMER PRECISION 8-DIP
• Manufacturer: National Semiconductor

Specifications of LM3905N

• Voltage - Supply: *
• Current - Supply: 2.5mA
• Operating Temperature: *
• Package / Case: *
• Frequency: *
• Count: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM3905N; LM3905

Timing Ratio
Comparator Input
Current
Trigger Voltage
Trigger Current
Supply Current
Timing Ratio
Comparator Input
Current
Trigger Voltage
Trigger Current
Output Leakage
Current
Capacitor Saturation
Voltage
Reset Resistance
Reference Voltage
Reference Regulation
Collector Saturation
Voltage
Emitter Saturation
Voltage
Average Temperature
Coefficient of Timing
Ratio
Minimum Trigger Width V
Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Power Dissipation
V
Collector Output Voltage
V
Trigger Voltage
V
Electrical Characteristics
Note 1 Continuous output shorts are not allowed Short circuit duration at ambient temperatures up to 40 C may be calculated from t
V
Note 2 These specifications apply for T
Note 3 Output pulse width can be calculated from the following equation t
saturation voltage This reduces to t
Note 4 Sign reversal may occur at high temperatures (
Note 5 Refer to RETS122X drawing of military LM122H version for specifications
CE
a
REF
ADJ
Parameter
is the collector to emitter voltage across the output transistor during the short
Voltage
Voltage (Forced)
Current
T
Boost Tied to V
T
Boost Tied to V
T
T
T
4 5V
Boost Tied to V
4 5V
Boost Tied to V
4 5V
V
V
R
R
T
0
4 5V
I
I
T
T
L
L
A
A
A
A
A t
A
A
A
TRIG
CE
TRIG
t t
t
s
e
e
e
e
e
e
e
e
e
e
I
e
OUT s
s
s
s
s
8 mA
50 mA
1 M
10 k
25 C 4 5V
25 C 4 5V
25 C 4 5V
25 C 4 5V
25 C V
25 C
25 C I
25 C I
e
e
e
40V
V
V
V
V
(R
AMIN s
Conditions
a
a
a
a
2 5V
3V
t
) (C
s
s
s
s
3 mA
L
L
TRIG
t
) for all but the most critical applications
40V
40V
40V
40V
e
e
a
a
a
a
T
A s
s
s
s
s
3 mA
50 mA
(Note 3)
(Note 4)
e
V
V
V
V
(Note 2)
T
a
l
a
a
a
2V
AMAX
100 C) where comparator input current is predominately leakage See typcial curves
s
s
s
s
40V
40V 0 626 0 632 0 638 0 620 0 632 0 644 0 620 0 632 0 644
40V
40V
unless otherwise noted
500 mW
g
5 mA
0 620 0 632 0 644 0 620 0 632 0 644
40V
40V
40V
0 62
0 62
Min
b
1 2
0 8
5V
3
5
e
LM122
(R
0 003
2
Typ
3 15
0 25
0 25
150
t
0 3
1 6
2 5
2 5
0 7
1 8
2 1
30
25
25
20
) (C
6
t
Logic Reverse Voltage
Output Short Circuit Duration (Note 1)
Lead Temperature
Operating Temperature Range
) 1
(Soldering 10 sec )
LM122
LM322
LM3905
0 644
0 644
Max
b
100
100
200
1 0
2 5
3 3
0 4
1 4
2 2
50
25
2
4
5
1
3
2(0 632
0 61
0 61
Min
b
1 2
0 8
b
3
2
r)
b
LM322
0 003
V
3 15
0 25
0 25
Typ
150
0 3
1 6
2 5
2 5
0 7
1 8
2 1
30
25
25
20
C
6
V
REF
0 654
0 654
) where r is timing ratio and V
Max
100
150
200
1 5
4 5
2 5
3 3
0 4
1 4
2 2
50
25
2
2
5
3
b
0 61
Min
1 2
0 8
b
3
2 5
55 C
e
LM3905
120 V
0 C
0 C
0 003
3 15
0 25
0 25
Typ
150
0 5
1 6
2 5
2 5
0 7
1 8
2 1
25
25
20
s
6
s
s
CE
T
A s
T
T
seconds where
A s
A s
0 654
C
Max
200
1 5
4 5
2 5
2 5
3 3
0 4
1 4
2 2
50
25
is capacitor
2
5
3
a
a
a
260 C
125 C
70 C
70 C
5 5V
Units
% C
mA
mV
mV
mV
mV
nA
nA
nA
nA
V
V
V
V
V
V
V
A
A
A
s