NTE NTE926

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 delays–from 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 edge–triggered, 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 Edge–triggered (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 One–Shot
Absolute Maximum Ratings:
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +16V
Maximum Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1450mW
Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.6mW/°C
Operating Ambient Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65 to +150°C
Lead Soldering Temperature (10 Sec Max), TSOLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
DC & AC Electrical Characteristics: (TA = +25°C, VCC = +5V, unless otherwise specified)
Parameter
Symbol
Min
Typ
Max
Unit
4.5
–
16
V
–
16
36
mA
Initial Accuracy
–
±2
5
%
Drift with Temperature
–
30
150
ppm/°C
Drift with Supply Voltage
–
0.1
0.9
%/V
0.8
–
2.4
V
–
5
100
µA
Supply Voltage
VCC
Supply Current
ICC
Timing Accuracy (t = RC)
Test Conditions
VCC = Reset = 15V
R = 2kΩ to 100kΩ, C = 1µF
Trigger Voltage
VCC = 15V, Note 1
Trigger Current
Trigger = 0V
Reset Voltage
Note 2
0.8
–
2.4
V
Reset Current
Reset
–
50
500
µA
Threshold Voltage
–
0.63
–
x VCC
Threshold Leakage
–
15
–
nA
–
0.1
0.4
V
–
1.0
2.0
V
–
10
500
nA
–
1.0
–
µS
Output Voltage
VOUT
IL = 10mA, Note 3
Output Leakage
Propagation Delay
tPD
Rise Time of Output
tR
IL = 100mA
–
100
–
nS
Fall Time of Output
tF
IL = 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 open–collector which requires a pull–up resistor to VCC to
sink current. The output is normally low sinking current.
Pin Connection Diagram
Output A 1
16 Output D
Timing A 2
Trigger A 3
15 Timing D
14 Trigger D
Control Voltage 4
VCC 5
16
.260 (6.6) Max
1
13 Reset
11 Trigger C
Timing B 7
10 Timing C
Output B 8
9 Output C
8
.300
(7.62)
.785 (19.9)
Max
12 GND
Trigger B 6
9
.200 (5.08)
Max
.245
(6.22)
Min
.100 (2.54)
.700 (17.7)