EM MICROELECTRONIC
-MARIN SA
Voltage Detector, High-Precision
Description
The EM6352 is an ultra-low current voltage detector
available in a large variety of configurations and very small
packages for maximum flexibility in all end-applications up to
125° and using power supplies between 1.5V and 5.5V.
C
This circuit monitors the supply voltage of any electronic
system, and generates the appropriate reset signal without a
delay time. The threshold defines the minimum allowed
voltage which guarantees the good functionality of the
system. As long as V
DD
stays above the threshold voltage,
the output stays inactive. If V
DD
drops below V
TH
, the output
goes active. The output is guaranteed to be in the correct
state for V
DD
down to 0.8V. There are 12 reset threshold
voltages starting as low as 1.31V and up to 4.63V. The
EM6352 features three output types: active-low push-pull,
active-low open-drain and active-high push-pull.
Small SC70 and SOT23 packages as well as ultra-low
supply current of 2.7µA make the EM6352 an ideal choice
for portable and battery-operated devices.
EM6352
Features
Ultra-low supply current of 2.7µA (V
DD
=3.3V)
Operating temperature range: -40° to +125°
C
C
±1.5%
reset threshold accuracy
12 reset threshold voltages V
TH
: 4.63V, 4.4V, 3.08V,
2.93V, 2.63V, 2.26V, 2.2V, 1.8V, 1.66V, 1.57V, 1.38V,
1.31V
3 reset output options:
Active-low
RESET
push-pull
Active-low
RESET
open-drain
Active-high
RESET
push-pull
No external components
Immune to short negative V
DD
transients
Guaranteed Reset valid down to 0.8V
Threshold hysteresis: 2.1% of V
TH
Very small SOT23-5L, SOT23-3L, SC70-3L
packages
Typical Application
V
DD
V
DD
RESET
*
V
DD
RESET
Applications
Mobile and cordless phones
Modems
Printers
TV, VCR, Video sets
GPS
Toys
Basestations
NiCd cell battery
EM6352
GND
MPU, DSP
GND
GND
*
R
EXT
for open-drain version only
Pin Configuration
(top view)
RESET
1
(RESET)
V
DD
GND
2
3
4 NC
GND 2
5 NC
RESET 1
(RESET)
3 V
DD
Block Diagram
V
DD
Voltage
Reference
SOT23-5L
GND 1
3 V
DD
RESET 2
(RESET)
SOT23-3L
-
+
RESET
(RESET)
SC70-3L
GND
Pin Description
SOT23-5L
Pin
SOT23-3L
SC70-3L
Name
RESET
1
1
2
RESET
2
3
4, 5
3
2
-
3
1
-
V
DD
GND
N.C.
Function
Active-low RESET output. RESET remains low while V
DD
is
below the reset threshold voltage.
Active-high RESET output. RESET remains high while V
DD
is
below the reset threshold voltage.
Supply Voltage (5.5V max.)
Ground
Not connected. Not internally connected
Copyright
©
2008, EM Microelectronic-Marin SA
01/08– rev.L
1
www.emmicroelectronic.com
EM6352
Ordering Information
EM6352 X SP3B - 2.9 +
Reset Output Type:
X = Active-low /RES push-pull
Y = Active-low /RES open-drain
Z = Active-high RES push-pull
RoHS Compliance:
+ = lead-free/green mold compliant
[blank]
= leaded
Reset Threshold Voltage (V
TH
):
1.3 = 1.31V
2.26 = 2.26V
1.4 = 1.38V
2.6 = 2.63V
1.6 = 1.57V
2.9 = 2.93V
1.7 = 1.66V
3.1 = 3.08V
1.8 = 1.80V
4.4 = 4.40V
2.2 = 2.20V
4.6 = 4.63V
Package:
SP3B = SOT23-3, Tape&Reel 3000 pcs
SP5B = SOT23-5, Tape&Reel 3000 pcs
SC3B = SC70-3, Tape&Reel 3000 pcs
SC4B = SC70-4, Tape&Reel 3000 pcs
Note:
subject to availability (see standard versions list below). Please give complete Part Number when ordering.
Standard Versions (Top Marking)
Top
Top Marking
2)
Marking
1)
With 4
Characters
Part Number
EM6352YSC3B-2.6+
EM6352XSP3B-4.6+
EM6352XSP3B-2.9+
EM6352XSP3B-2.6+
EM6352XSP3B-2.26+
EM6352XSP3B-2.2+
EM6352XSC3B-4.6+
EM6352XSC3B-2.9+
EM6352XSC3B-2.2+
1)
BKAT
KE##
K8##
BKAG
K7##
K5##
BKAL
K8##
K5##
Top marking is the standard from 2006. No bottom marking exists. Where ## refers to the lot number (EM internal
reference only)
2)
Top marking with 4 characters is standard from 2003. For lead-free/green mold (RoHS) parts, the first letter of top
marking with 4 characters begins with letter “B” instead of letter “A”. Bottom marking indicates the lot number.
Standard Versions (Samples)
Part Number
EM6352YSC3B-2.6+
EM6352XSP3B-4.6+
EM6352XSP3B-2.9+
EM6352XSP3B-2.6+
EM6352XSP3B-2.26+
Part Number
EM6352XSP3B-2.2+
EM6352XSC3B-4.6+
EM6352XSC3B-2.9+
EM6352XSC3B-2.2+
Sample stock is generally held on
standard versions
only. Please contact factory for other versions not shown here and
for availability of non standard versions.
Copyright
©
2008, EM Microelectronic-Marin SA
01/08– rev.L
2
www.emmicroelectronic.com
EM6352
Absolute Maximum Ratings
Parameter
Voltage at V
DD
to GND
Minimum voltage at any
signal pin
Maximum voltage at any
signal pin
Electrostatic discharge
max. to MIL-STD-883C
method 3015.7 with ref. to
V
SS
Max. soldering conditions
Storage Temperature
Range
Symbol
V
DD
V
MIN
V
MAX
Handling Procedures
Conditions
-0.3V to +6V
GND - 0.3V
V
DD
+ 0.3V
This device has built-in protection against high static
voltages or electric fields; however, anti-static precautions
must 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.
Unused inputs must always be tied to a defined logic
voltage level.
V
ESD
T
MAX
T
STG
2000V
250° x 10s
C
-65° to +150°
C
C
Operating Conditions
Parameter
Supply voltage (note 1)
Operating Temperature
Symbol Min Max Unit
V
DD
0.8 5.5
V
T
A
-40 +125 °
C
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.
Electrical Characteristics
Unless otherwise specified: V
DD
= 0.8V to 5.5V, T
A
=+25° (note 1).
C
Conditions
Parameter
Symbol
+25°
C
V
DD
=1.5V
-40° to +125°
C
C
Supply current (note 2)
I
DD
V
DD
=3.3V
V
DD
=5.0V
+25°
C
-40° to +125°
C
C
+25°
C
-40° to +125°
C
C
Min
-
-
-
-
-
-
1.290
1.359
1.546
1.635
1.773
2.167
2.226
2.591
2.886
3.034
4.334
4.561
Typ
2.1
2.7
3.2
1.31
1.38
1.57
1.66
1.80
2.20
2.26
2.63
2.93
3.08
4.40
4.63
Max
4.5
7
5.4
8.3
6.3
9.6
1.330
1.401
1.594
1.685
1.827
2.233
2.294
2.669
2.974
3.126
4.466
4.699
Unit
µ
A
EM6352 – 1.3
EM6352 – 1.4
EM6352 – 1.6
EM6352 – 1.7
Threshold voltage
(note 3)
EM6352 – 1.8
EM6352 – 2.2
EM6352 – 2.26
EM6352 – 2.6
EM6352 – 2.9
EM6352 – 3.1
EM6352 – 4.4
EM6352 – 4.6
V
TH
V
Threshold voltage
∆
V
TH
temperature coefficient
T
A
= -40° to +125°
C
C
-
-
ppm/°
C
±
50
∆
T
A
(note 4)
Threshold hysteresis
V
HYS
-
2.1%
•
V
TH
-
V
Note 1:
Production tested at +25° only. Over temperature limits are guaranteed by design, not production tested.
C
V
DD
min=0.9V for active-high versions (EM6352Z).
Note 2:
RESET (RESET)
open.
Note 3:
Threshold voltage is specified for V
DD
falling.
Note 4:
Typical variation
∆
V
TH
of V
TH
at a given temperature T
A
is calculated as follows:
∆
V
TH
(T
=
T
A
)
=
∆
V
TH
×
V
TH
×
T
A
−
25
°
C
∆
T
A
Example:
-6
for version V
TH
=2.93V, variation at T
A
=70° is equal to
∆
V
TH
(70°
C
C)=±50
•
10 x 2.93 x (70-25)=±6.59mV
Copyright
©
2008, EM Microelectronic-Marin SA
01/08– rev.L
3
www.emmicroelectronic.com
EM6352
Electrical Characteristics
(continued)
Unless otherwise specified: V
DD
= 0.8V to 5.5V, T
A
=+25° C (note 1).
Parameter
Reset timeout period
Propagation delay time
V
DD
to
RESET
(RESET) delay
Open-drain
RESET
output
Voltage
Symbol
t
POR
t
P
Conditions
V
DD
from 0V to V
TH (typ)
+15% (note 2)
V
DD
drops from V
TH (typ)
+0.2V to V
TH (typ)
-0.2V
(note 2)
V
DD
>1V
-40° to +125°
C
C
V
DD
>2.5V
V
DD
>5V
V
DD
>1V
V
DD
>2.5V
V
DD
>5V
V
DD
>1V
I
OL
=100
µ
A
I
OL
=1.5mA
I
OL
=3mA
I
OL
=100
µ
A
I
OL
=1.5mA
I
OL
=3mA
I
OH
=-30
µ
A
I
OH
=-1.5mA
I
OH
=-3mA
Min
9
2
-
-
-
-
-
-
0.8
2
4
Typ
500
130
-
-
-
-
-
-
-
-
-
Max
1090
255
0.3
0.3
0.3
0.3
0.3
0.3
-
-
-
Unit
µ
s
µ
s
V
OL
V
V
OL
Push-pull RESET /
RESET
Output voltage
V
OH
-40° to +125°
C
C
V
-40° to +125°
C
C
V
DD
>2.5V
V
DD
>5V
Output leakage current
I
LEAK
-40° to +125° only for EM6352Y (open-drain)
C
C,
-
-
0.5
Note 1:
Production tested at +25° only. Over temperature limits are guaranteed by design, not production tested.
C
V
DD
min=0.9V for active-high version (EM6352Z).
Note 2:
RESET (RESET)
open.
µ
A
Timing Waveforms
t
SEN
V
DD
V
TH
Overdrive
V
HYS
0.8V
t
logic "1"
RESET
logic "0"
t
logic "1"
t
POR
t
P
RESET
RESET
logic "0"
t
Note 5:
t
SEN
= Maximum Transient Duration. Please refer to figure on next page.
Note 6:
Overdrive = V
TH-
-V
DD
. Please refer to figure on next page.
Copyright
©
2008, EM Microelectronic-Marin SA
01/08– rev.L
4
www.emmicroelectronic.com
EM6352
Typical Operating Characteristics
(Typical values are at T
A
=+25° unless otherwise noted,
RESET
or RESET open.)
C
7
6
5
[ uA ]
4
3
2
1
0
-50
V
DD
1. 5 V
V
DD
5 . 0 V
V
DD
3 . 3 V
300
250
200
[ us ]
150
100
50
0
-50 -25
-25
0
25
50
[° ]
C
75
100
125
0
25
50
75
100 125
[° ]
C
I
DD
vs. Temperature
Propagation Time t
P
vs. Temperature
2500
2000
400
350
300
1500
[ us ]
1000
500
0
-50 -25
250
[ us ]
200
150
100
50
0
0
25
50
75
100 125
1
10
[ mV ]
100
1000
[° ]
C
Reset occurs
above this line
Reset Timeout Period t
POR
vs. Temperature
Maximum Transient Duration t
SEN
vs. Overdrive V
TH
-V
DD
8%
6%
4%
2%
0%
-2%
-4%
-6%
-8%
-50
-25
0
25
50
75
100
125
[°
C]
Threshold Voltage Variation vs. Temperature (normalized)
Copyright
©
2008, EM Microelectronic-Marin SA
01/08– rev.L
5
www.emmicroelectronic.com
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