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LM193W, LM293W, LM393W
Low power dual voltage comparators
Features
Wide single supply voltage range or dual
supplies: +2 V to +36 V or ±1 V to ±18 V
Very low supply current (0.4 mA) independent
of supply voltage (1 mW/comparator at +5 V)
Low input bias current: 25 nA typ
Low input offset current: ±5 nA typ
Low input offset voltage: ±1 mV typ
Input common-mode voltage range includes
ground
Low output saturation voltage: 250 mV typ.
(Io = 4 mA)
Differential input voltage range equal to the
supply voltage
TTL, DTL, ECL, MOS, CMOS compatible
outputs
ESD internal protection: 2 kV
Description
These devices consist of two independent low
voltage comparators designed specifically to
operate from a single supply over a wide range of
voltages. Operation from split power supplies is
also possible.
These comparators also have a unique
characteristic in that the input common-mode
voltage range includes ground even though
operated from a single power supply voltage.
All the pins are protected against electrostatic
discharge up to 2 kV. As a consequence, the input
voltages must not exceed the magnitude of VCC+
or VCC-.
DIP8
(Plastic package)
SO8
(Plastic micropackage)
TSSOP8
(Thin shrink small outline package)
Pin connections
(Top view)
1 - Output 1
2 - Inverting input 1
3 - Non-inverting input 1
4 - VCC-
5 - Non-inverting input 2
6 - Inverting input 2
7 - Output 2
8 - VCC+
December 2008
Rev 2
1/15
www.st.com
15

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Schematic diagram
1 Schematic diagram
LM193W, LM293W, LM393W
Figure 1. Circuit schematic (1/2 LM193W)
VCC+
3.5µA
100µA
3.5µA
100µA
VCC+
Non-Inverting
Input
Inverting
Input
VCC-
VCC-
VCC+
VCC-
VCC-
Vo
VCC-
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LM193W, LM293W, LM393W
Absolute maximum ratings and operating conditions
2 Absolute maximum ratings and operating conditions
Table 1.
Symbol
Absolute maximum ratings
Parameter
Value
Unit
VCC
Vid
Vin
Rthja
Rthjc
Supply voltage
Differential input voltage
Input voltage
Output short-circuit to ground (1)
Thermal resistance junction to ambient(2)
SO-8
TSSOP8
DIP8
Thermal resistance junction to case(2)
SO-8
TSSOP8
DIP8
±18 or 36
VCC- -0.3 to VCC+ +0.3
Infinite
125
120
85
40
37
41
V
V
°C/W
°C/W
Tj
Tstg
ESD
Junction temperature
Storage temperature range
HBM: human body model(3)
MM: machine model(4)
CDM: charged device model(5)
150
-65 to +150
2000
200
1500
°C
°C
V
1.
Short-circuits from the output to VCC+ can cause excessive heating
maximum output current is approximately 20mA independent of the
and eventual
magnitude of
destruction.
VCC+.
The
2. Short-circuits can cause excessive heating and destructive dissipation. Values are typical.
3. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating.
4. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of
connected pin combinations while the other pins are floating.
5. Charged device model: all pins and the package are charged together to the specified voltage and then
discharged directly to the ground through only one pin. This is done for all pins.
Table 2. Operating conditions
Symbol
Parameter
Vicm
Toper
Common mode input voltage range
Operating free-air temperature range
LM193W
LM293W
LM393W
Value
0 to VCC+ -1.5
-55 to +125
-40 to +105
0 to +70
Unit
V
°C
3/15

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Electrical characteristics
3 Electrical characteristics
LM193W, LM293W, LM393W
4/15
Table 3.
Symbol
VCC+ = +5V, VCC-= 0V, Tamb = +25°C (unless otherwise specified)
Parameter
Min Typ. Max.
Unit
Input offset voltage (1)
Vio Tamb = +25°C
Tmin Tamb Tmax
Input bias current (2)
Iib Tamb = +25°C
Tmin Tamb Tmax
1 5 mV
9
25 250 nA
400
Input offset current
Iio Tamb = +25°C
Tmin Tamb Tmax
5 50 nA
150
Large signal voltage gain
Avd VCC = 15V, RL = 15kΩ, Vo = 1V to 11V
50 200
V/mV
ICC
Vicm
Vid
Supply current (all comparators)
VCC = 5V, no load
VCC = 30V, no load
Input common mode voltage range (3)
Tamb = +25°C
Tmin Tamb Tmax
Differential input voltage (4)
0.4
1
1
2.5
mA
0
VCC+ -1.5
V
0 VCC+ -2
VCC+
V
Output sink current
Isink Vid= 1V, Vo = 1.5V
6 16
mA
Low level output voltage, Vid = -1V, Isink = 4mA
VOL Tamb = +25°C
Tmin Tamb Tmax
250 400 mV
700
High level output current, Vid = 1V, VCC = Vo = 30V
IOH Tamb = +25°C
Tmin Tamb Tmax
Response time (5)
tre RL= 5.1kΩ to VCC+
0.1 nA
1 μA
1.3 μs
Large signal response time
trel Vi = TTL, V(ref) = +1.4V, RL= 5.1kΩ to VCC+
300 ns
1. rAatnoguetp(u0tVswtoitcVhCCp+oi-n1t,.5VVo ). 1.4 V, Rs = 0 with VCC+ from 5 V to 30 V, and over the full common-mode
2. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially
constant, independent of the state of the output, so there is no loading charge on the reference of input
lines.
3. The input common-mode voltage of either input signal voltage should not be allowed to go negative by
more than 0.3 V. The upper end of the common-mode voltage range is VCC+ -1.5 V, but either or both
inputs can go to +30 V without damage.
4. Positive excursions of input voltage may exceed the power supply level. As long as the other voltage
remains within the common-mode range, the comparator will provide a proper output state. The low input
voltage state must not be less than -0.3 V (or 0.3 V below the negative power supply, if used).
5. The response time specified is for a 100 mV input step with 5 mV overdrive. For larger overdrive signals
300 ns can be obtained.

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LM193W, LM293W, LM393W
Figure 2. Supply current versus supply
voltage
Electrical characteristics
Figure 3. Input current versus supply voltage
Figure 4. Output saturation voltage versus Figure 5. Response time for various input
output current
overdrives - negative transition
Figure 6. Response time for various input
overdrives - positive transition
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