NTE926
Integrated Circuit
Quad Timer
Description:
The NTE926 quad timer is a monolithic timing device which can be used to produce four independent
timing functions. The NTE926 output sinks current. This highly stable, general purpose controller
can be used in a monostable mode to produce accurate time delaysfrom microseconds to hours.
In the time delay mode of operation, the time is precisely controlled by one external resistor and one
capacitor. A stable operation can be achieved by using two of the four timer sections.
The four timer section in the NTE926 are edgetriggered, therefore, when connected in tandem for
sequential timing applications, no coupling capacitors are required. Output current capability of
100mA is provided in both devices.
Features:
D
100mA Output Current per Section
D
Edgetriggered (No Coupling Capacitor)
D
Output Independent of Trigger Conditions
D
Wide Supply Voltage Range 4.5V to 18V
D
Timer Intervals from Microseconds to Hours
D
Time Period Equals RC
Applications:
D
Sequential Timing
D
Time Delay Generation
D
Precision Timing
D
Quad OneShot
Absolute Maximum Ratings:
Supply Voltage, V
CC
+16V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Power Dissipation (T
A
= +25
C), P
D
1450mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Above 25
C
11.6mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
A
0 to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65 to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Soldering Temperature (10 Sec Max), T
SOLD
+300
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC & AC Electrical Characteristics: (T
A
= +25
C, V
CC
= +5V, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Voltage
V
CC
4.5
16
V
Supply Current
I
CC
V
CC
= Reset = 15V
16
36
mA
Timing Accuracy (t = RC)
R = 2k
to 100k
, C = 1
F
Initial Accuracy
2
5
%
Drift with Temperature
30
150
ppm/
C
Drift with Supply Voltage
0.1
0.9
%/V
Trigger Voltage
V
CC
= 15V, Note 1
0.8
2.4
V
Trigger Current
Trigger = 0V
5
100
A
Reset Voltage
Note 2
0.8
2.4
V
Reset Current
Reset
50
500
A
Threshold Voltage
0.63
x V
CC
Threshold Leakage
15
nA
Output Voltage
V
OUT
I
L
= 10mA, Note 3
0.1
0.4
V
1.0
2.0
V
Output Leakage
10
500
nA
Propagation Delay
t
PD
1.0
S
Rise Time of Output
t
R
I
L
= 100mA
100
nS
Fall Time of Output
t
F
I
L
= 100mA
100
nS
Note 1. The trigger functions only on the falling edge of the trigger pulse only after previously being
high. After reset, the trigger must be brought high and then low to implement triggering.
Note 2. For reset below 0.8V, outputs set low and trigger inhibited. For reset above 2.4V, trigger
enabled.
Note 3. The NTE926 output structure is opencollector which requires a pullup resistor to V
CC
to
sink current. The output is normally low sinking current.
.260 (6.6) Max
16
9
1
8
.785 (19.9)
Max
.200 (5.08)
Max
.245
(6.22)
Min
.300
(7.62)
.700 (17.7)
.100 (2.54)
V
CC
Timing C
Trigger C
Reset
Output C
GND
Trigger D
Output D
Timing B
Control Voltage
Output B
Trigger B
Trigger A
Timing A
Output A
1
2
3
4
5
6
7
8
16
15
14
13
Timing D
12
11
10
9
Pin Connection Diagram
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