R
V6340
Copyright 2005, EM Microelectronic-Marin SA
03/06 rev.K
1
www.emmicroelectronic.com
Ultra Low Cost 3-Pin Microprocessor Reset
Description
The V6340 monitors the supply voltage of any electronic
system, and generates the appropriate Reset signal. The
threshold must be chosen to the minimum allowed voltage
which guarantees the good functionality of the system. As
long as V
DD
stays upside this voltage level, the output stays
inactive. If V
DD
drops below V
TH
, the output gets active.
The threshold voltage may be obtained in different versions:
2.6V, 3.0V, 3.7V and 4.4V.
Features
!
SOT-23 and TO-92 package
!
Reset output state guaranteed down to V
DD
= 1V @
25C
!
Low supply current: stays stable during switching
versions B, N, N:
typ. 19A at V
DD
= 5V
other versions:
typ. 38A at V
DD
= 5V
!
2.5% voltage threshold accuracy
!
High noise immunity
!
No external components required
!
Push-pull or Open drain output
!
Pin compatible with MAX 809 in SOT-23, by appropriate
layout on PCB
!
Pin compatible with MC 33164 in TO-92
!
TTL output compatibility
Applications
Applications needing a voltage detection:
!
Computer electronics
!
White / Brown goods
!
Automotive electronics
!
Industrial electronics
!
Telecom systems
!
Hand-held systems
Typical Operating Configuration
V6340
Micro-
processor
V
DD
V
SS
RES
or
RES
V
DD
GND
Fig. 1
Pin Assignment
V6340
1
2
3
View
Flat Front
V
DD
V
SS
RES
or
RES
TO-92
V6340
3
2
1
V
SS
RES or
RES
V
DD
SOT23-3L
Fig. 2
EM MICROELECTRONIC -
MARIN SA
R
V6340
Copyright 2005, EM Microelectronic-Marin SA
03/06 rev.K
2
www.emmicroelectronic.com
Absolute Maximum Ratings
Parameter Symbol
Conditions
Voltage at V
DD
to V
SS
V
DD
-0.3V to +8V
Minimum voltage at RES or
RES
V
min
V
SS
0.3V
Maximum voltage at RES or
RES
V
max
V
DD
+ 0.3V
Storage Temperature Range
T
STO
-65C to +150C
Table 1
Stresses above these listed maximum ratings may cause
permanent damages to the device. Exposure beyond
specified operating conditions may affect device reliability or
cause malfunction.
Handling Procedures
This device has built-in protection against high static
voltages or electric fields; however, it is advised that normal
precautions be taken as for any other CMOS component.
Unless otherwise specified, proper operation can only occur
when all terminal voltages are kept within the voltage range.
Operating Conditions
Parameter Symbol
Min
Max
Unit
Operating Temperature
1)
T
A
-40
+125 C
Positive Supply Voltage
2)
V
DD
1 5.5 V
Table 2
1)
The maximum operating temperature is confirmed by
sampling at initial device qualification. In production, all
devices are tested at +25C
2)
V
DD
= 1V guaranteed at +25C (see Fig. 14 for more
information)
Electrical Characteristics
T
A
= +25C, unless otherwise specified
Parameter Symbol
Test
Conditions
Min.
Typ.
Max.
Unit
Supply current
I
DD
V
DD
= 5V, output open
38
50
A
Threshold voltage
V
TH
C,
I,
O
2.94 3.02 3.10
V
V
TH
D, J, P
3.62
3.72
3.82
V
V
TH
F, L, R
4.27
4.39
4.51
V
Threshold hysteresis
V
HYS
5
mV
RES Output Low Level
V
OL
V
DD
= 1.6V, I
OL
= 1mA
200
270
mV
V
OL
V
DD
= 2.5V, I
OL
= 2mA
195
250
mV
V
OL
V
DD
= 3.5V, I
OL
= 3mA
198
250
mV
V
OL
V
DD
= 5V, I
OL
= 4mA
185
250
mV
RES Output High Level
V
OH
V
DD
= 1.6V, I
OH
= -1mA
1.25
1.36
V
V
OH
V
DD
= 2.5V, I
OH
= -1.5mA
2.2
2.3
V
V
OH
V
DD
= 3.5V, I
OH
= -2.5mA
3.15
3.27
V
V
OH
V
DD
= 5V, I
OH
= -3.5mA
4.65
4.76
V
Output leakage current
1)
I
LEAK
V
DD
= 5V
0.005
1
A
Only for version B, H and N
Parameter Symbol
Test
Conditions
Min.
Typ.
Max.
Unit
Supply current
I
DD
V
DD
= 5V, output open
19
31
A
Threshold voltage
V
TH
B, H, N
2.56
2.65
2.74
V
Threshold hysteresis
V
HYS
32
mV
Table 3
1)
Only for Open drain versions
Timing Waveform
Block Diagram
Voltage
Reference
+
-
RES or
RES
V
SS
V
DD
Fig.3
Fig.4
R
V6340
Copyright 2005, EM Microelectronic-Marin SA
03/06 rev.K
3
www.emmicroelectronic.com
Typical Characteristics
R
V6340
Copyright 2005, EM Microelectronic-Marin SA
03/06 rev.K
4
www.emmicroelectronic.com
R
V6340
Copyright 2005, EM Microelectronic-Marin SA
03/06 rev.K
5
www.emmicroelectronic.com
Typical Applications
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