GS6332 and GS6333
Vishay
formerly General Semiconductor
3 Pin, Low-Power,
µP
Reset Circuits
Pin Configuration
SOT-23 (Top View)
Description
• The GS6333 and GS6332 are system supervisor circuits
designed to monitor V
CC
in digital systems and provide
a reset signal to the host processor when necessary. No
external components are required.
GND
1
3
V
cc
Reset/
Reset
2
• When the processor power supply voltage drops below
the reset threshold, the reset output is driven active, in
less than 40µs (T
D1
). Reset is maintained active for a
time period (T
D2
), after the V
cc
rises above the threshold
voltage.
• To prevent jitter, the reset threshold voltage has a built-in
hysteresis of 0.4% of V
TH
.
Fig. 1 – Typical Application Diagram
• The GS6333 has an active-low reset output, while the
GS6332 has an active-high reset output. Both devices
have push/pull output drives.
• The reset signal is guaranteed valid, down to V
cc
= 1.0V.
V
CC
V
CC
V
CC
GS6332
GS6333
RESET
(RESET)
GND
RESET
INPUT
µP
• Low supply current of 3µA makes these devices well suit-
ed for battery powered applications. They are designed
to reject fast transients from causing false resets.
• Both devices are available in a space-saving SOT-23
package.
GND
Features
• Tight reset voltage tolerances ± 1.8%
• Low supply current: < 3µA
• Precision monitoring of 1.8V and 2.5V
powersupply voltages
• Other threshold voltage options available from 1.5V to
2.5V in approximately 100mV increments
• Three reset active time-out period options:
typical 1.5mS, 30mS, 150mS
• Reset output guaranteed down to 1.0V
• V
cc
transient immunity
• No external components
Applications
•
•
•
•
Computers
Critical
µP/µC
power monitoring
Battery powered equipment
Automotive electronics
Document Number 74810
22-May-02
www.vishay.com
1
GS6332 and GS6333
Vishay
formerly General Semiconductor
Absolute Maximum Ratings
(1)
Parameter
Supply Voltage
Reset/Reset
Input Current, V
cc
Output Current, Reset/Reset
dV/dT (V
cc
)
Operating Temperature Range
Storage Temperature Range
Power Dissipation (T
A
≤
70°C)
SOT-23 (Derate 4mW/°C above 70°C)
T
A
T
stg
P
D
Symbol
V
cc
Value
6.0
–0.3 to (V
cc
+ 0.3)
20
20
100
–40 to +125
–65 to +150
260
Unit
V
V
mA
mA
V/µS
°C
°C
mW
Note:
(1) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
Electrical Characteristics
Parameter
T
A
= –40°C to 125°C unless otherwise noted. Typical values are at T
A
= 25°C
Symbol
Test Conditions
T
A
= 25°C
Min
1
1
1.2
–
–
V
TH
–1.8%
V
TH
–3%
Typ
–
–
–
–
–
V
TH
V
TH
0.4
Max
5.5
5.5
5.5
7.0
3.0
V
TH
+1.8%
V
TH
+3%
Unit
V
cc
Range
V
RANGE
T
A
= –40 to +85°C
T
A
= –40 to +125°C
V
Supply Current
(No Load)
Reset Threshold
Threshold Hysteresis
I
CC
Vcc = 3.0V
T
A
= 25°C
µA
V
TH
V
TH HIST
T
A
= 25°C
T
A
= –40 to +125°C
V
%V
TH
Reset Output Voltage Low
V
OL
GS6332 V
CC
> V
TH
GS6333 V
CC
< V
TH
I
SINK
= 50µA, V
CC
≥1.0V
I
SINK
= 500µA, V
CC
≥1.8V
GS6332 V
CC
< V
TH
GS6333 V
CC
> V
TH
I
SOURCE
= 200µA, V
CC
≥1.8V
I
SOURCE
= 500µA, V
CC
≥2.7V
V
CC
to V
TH
– 100mV
GS633xUR−D1
GS633xUR−D2
GS633xUR−D3
–
–
0.4
0.3
V
Reset Output Voltage High
V
OH
0.8V
CC
0.8V
CC
–
0.5
15
80
–
–
V
µS
mS
V
CC
Falling Reset Delay
Reset Timeout Period
T
D1
T
D2
–
1.5
30
150
40
5
50
230
Document Number 74810
22-May-02
www.vishay.com
3
GS6332 and GS6333
Vishay
formerly General Semiconductor
Ratings and
Characteristic Curves
(T
A
= 25°C unless otherwise noted)
Fig. 2 – Timing Diagram
V
TH
V
TH
V
CC
T
D2
Reset
50%
T
D1
50%
T
D2
Reset
50%
T
D1
50%
Fig. 3 – Transient Rejection
Supply (V
CC
) Transients
Transient Duration (µS)
140
120
100
80
60
40
20
0
0.01
These devices have a certain immunity to fast negative
going transients. The graph titled “Transient Rejection”
shows the maximum allowable transient amplitude and
duration to avoid triggering an unintended reset. As
shown in the graph shorter transients can have larger
amplitudes without triggering resets.
0.1
1
Transient Amplitude (V)
www.vishay.com
4
Document Number 74810
22-May-02
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