LM339N National Semiconductor, LM339N Datasheet - Page 6

• Manufacturer Part Number: LM339N
• Manufacturer: National Semiconductor

Specifications of LM339N

• Number Of Elements: 4
• Output Type: Open Collector
• Technology: Bipolar
• Input Offset Voltage: 5mV
• Input Bias Current (typ): 250nA
• Response Time: 1.3us
• Single Supply Voltage (typ): 3/5/9/12/15/18/24/28V
• Dual Supply Voltage (typ): ±3/±5/±9/±12/±15V
• Supply Current (max): 2@5VmA
• Power Supply Requirement: Single/Dual
• Voltage Gain In Db: 106.02dB
• Single Supply Voltage (min): 2V
• Single Supply Voltage (max): 36V
• Dual Supply Voltage (min): ±1V
• Dual Supply Voltage (max): ±18V
• Power Dissipation: 1.05W
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 14
• Package Type: PDIP
• Lead Free Status / Rohs Status: Not Compliant

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Typical Performance Characteristics
Response Time for Various
Input Overdrives — Negative
Transition
Application Hints
The LM139 series are high gain, wide bandwidth devices
which, like most comparators, can easily oscillate if the
output lead is inadvertently allowed to capacitively couple to
the inputs via stray capacitance. This shows up only during
the output voltage transition intervals as the comparator
changes states. Power supply bypassing is not required to
solve this problem. Standard PC board layout is helpful as it
reduces stray input-output coupling. Reducing this input
resistors to
finally, adding even a small amount (1 to 10 mV) of positive
feedback (hysteresis) causes such a rapid transition that
oscillations due to stray feedback are not possible. Simply
socketing the IC and attaching resistors to the pins will cause
input-output oscillations during the small transition intervals
unless hysteresis is used. If the input signal is a pulse
waveform, with relatively fast rise and fall times, hysteresis is
not required.
All pins of any unused comparators should be tied to the
negative supply.
The bias network of the LM139 series establishes a drain
current which is independent of the magnitude of the power
supply voltage over the range of from 2 V
It is usually unnecessary to use a bypass capacitor across
the power supply line.
Typical Applications
Basic Comparator
<
10 k
reduces the feedback signal levels and
DS005706-3
(V
+
= 5.0 V
DS005706-42
DC
to 30 V
DC
)
DC
.
Driving CMOS
Response Time for Various
Input Overdrives-Positive
Transition
LM2901 (Continued)
6
The differential input voltage may be larger than V
damaging the device. Protection should be provided to
prevent the input voltages from going negative more than
−0.3 V
shown in the applications section.
The output of the LM139 series is the uncommitted collector
of a grounded-emitter NPN output transistor. Many collectors
can be tied together to provide an output OR’ing function. An
output pull-up resistor can be connected to any available
power supply voltage within the permitted supply voltage
range and there is no restriction on this voltage due to the
magnitude of the voltage which is applied to the V
of the LM139A package. The output can also be used as a
simple SPST switch to ground (when a pull-up resistor is not
used). The amount of current which the output device can
sink is limited by the drive available (which is independent of
V
is reached (approximately 16 mA), the output transistor will
come out of saturation and the output voltage will rise very
rapidly. The output saturation voltage is limited by the
approximately 60
offset voltage of the output transistor (1 mV) allows the
output to clamp essentially to ground level for small load
currents.
+
) and the of this device. When the maximum current limit
DC
DS005706-4
(at 25˚C). An input clamp diode can be used as
R
SAT
of the output transistor. The low
Driving TTL
DS005706-43
+
+
terminal
without
DS005706-5