EM6352
Copyright
2006, EM Microelectronic-Marin SA
03/06 rev.I
1
www.emmicroelectronic.com
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
125C and using power supplies between 1.5V and 5.5V.
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 2.7A make the EM6352 an ideal choice
for portable and battery-operated devices.
Typical Application
V
DD
GND
RESET
EM6352
V
DD
GND
RESET
MPU, DSP
V
DD
GND
*
R
EXT
for open-drain version only
*
Pin Configuration
(top view)
SC70-4L
(SC-82AB)
1
2
4
3
V
DD
GND
NC
SOT23-5L
1
3
2
5
4
NC
NC
1
2
3
GND
V
DD
SOT23-3L
V
DD
GND
RESET
(RESET)
RESET
(RESET)
RESET
(RESET)
SC70-3L
1
3 V
DD
RESET
(RESET)
2
GND
Features
!
Ultra-low supply current of 2.7A (V
DD
=3.3V)
!
Operating temperature range: -40C to +125C
!
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 and
SC70-4L (SC-82AB) packages
Applications
!
Mobile and cordless phones
!
Modems
!
Printers
!
TV, VCR, Video sets
!
GPS
!
Toys
!
Basestations
!
NiCd cell battery
!
Automotive systems
Block Diagram
(RESET)
RESET
V
DD
GND
+
-
Voltage
Reference
Pin Description
Pin
SOT23-5L SOT23-3L SC70-4L SC70-3L
Name
Function
RESET
Active-low RESET output. RESET remains low while V
DD
is
below the reset threshold voltage.
1 1 1 2
RESET
Active-high RESET output. RESET remains high while V
DD
is
below the reset threshold voltage.
2 3 2 3
V
DD
Supply Voltage (5.5V max.)
3 2 4 1
GND
Ground
4, 5
-
3
-
N.C.
Not connected. Not internally connected
EM MICROELECTRONIC
-MARIN SA
EM6352
Copyright
2006, EM Microelectronic-Marin SA
03/06 rev.I
2
www.emmicroelectronic.com
Ordering Information
EM6352
-
Reset Output Type:
RoHS Compliance:
X = Active-low /RES push-pull
+ = lead-free/green mold compliant
Y = Active-low /RES open-drain
[blank] = leaded
Z = Active-high RES push-pull
Reset Threshold Voltage (V
TH
):
1.3 = 1.31V
2.26 = 2.26V
Package:
1.4 = 1.38V
2.6 = 2.63V
SP3B = SOT23-3, Tape&Reel 3000 pcs
1.6 = 1.57V
2.9 = 2.93V
SP5B = SOT23-5, Tape&Reel 3000 pcs
1.7 = 1.66V
3.1 = 3.08V
SC3B = SC70-3, Tape&Reel 3000 pcs
1.8 = 1.80V
4.4 = 4.40V
SC4B = SC70-4, Tape&Reel 3000 pcs
2.2 = 2.20V
4.6 = 4.63V
X SP3B 2.9 +
Note: subject to availability (see standard versions list below). Please give complete Part Number when ordering.
Standard Versions (Top Marking)
Part Number
Top
Marking
1)
Top Marking
2)
with 4
Characters
EM6352XSC3B-1.3
AKAA
EM6352XSC3B-1.8
AKAE
EM6352XSC3B-2.2
AKAF
EM6352XSC3B-2.2+ K5## BKAF
EM6352XSC3B-2.6
AKAG
EM6352XSC3B-2.9
AKAH
EM6352XSC3B-2.9+ K8## BKAH
EM6352XSC3B-4.6
AKAL
EM6352XSC3B-4.6+
BKAL
EM6352YSP3B-2.26
AKAZ
EM6352YSP3B-2.6
AKAT
EM6352YSP3B-2.9
AKAU
EM6352YSC3B-2.6
AKAT
EM6352YSC3B-4.6
AKAX
EM6352YSC4B-1.3
AKAM
EM6352YSC4B-2.9
AKAU
EM6352YSC4B-3.1
AKAV
1)
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
EM6352XSC3B-2.2+
EM6352XSC3B-2.9+
EM6352XSC3B-4.6+
EM6352XSP3B-2.2
EM6352XSP3B-2.26+
Part Number
EM6352XSP3B-2.6+
EM6352XSP3B-2.9+
EM6352XSP3B-4.6+
EM6352YSC4B-3.1
EM6352YSP3B-2.2
Sample stock is generally held on
standard versions only. Non standard versions have a 30,000 pieces minimum order
quantity. Please contact factory for other versions not shown here and for availability of non standard versions.
Part Number
Top
Marking
1)
Top Marking
2)
with 4
Characters
EM6352XSP3B-1.3
AKAA
EM6352XSP3B-1.8
AKAE
EM6352XSP3B-1.8+ K3## BKAE
EM6352XSP3B-2.2
AKAF
EM6352XSP3B-2.2+ K5## BKAF
EM6352XSP3B-2.26
AKAY
EM6352XSP3B-2.26+ K7## BKAY
EM6352XSP3B-2.6
AKAG
EM6352XSP3B-2.6+
BKAG
EM6352XSP3B-2.9
AKAH
EM6352XSP3B-2.9+ K8## BKAH
EM6352XSP3B-4.6
AKAL
EM6352XSP3B-4.6+ KE## BKAL
EM6352XSP5B-1.3
AKAA
EM6352XSP5B-1.8
AKAE
EM6352XSP5B-2.6
AKAG
EM6352XSP5B-2.9
AKAH
EM6352XSP5B-4.6
AKAL
EM6352
Copyright
2006, EM Microelectronic-Marin SA
03/06 rev.I
3
www.emmicroelectronic.com
Absolute Maximum Ratings
Parameter Symbol
Conditions
Voltage at V
DD
to GND
V
DD
-0.3V to +6V
Minimum voltage at any
signal pin
V
MIN
GND - 0.3V
Maximum voltage at any
signal pin
V
MAX
V
DD
+ 0.3V
Electrostatic discharge
max. to MIL-STD-883C
method 3015.7 with ref. to
V
SS
V
ESD
2000V
Max. soldering conditions
T
MAX
250C x 10s
Storage Temperature
Range
T
STG
-65C to +150C
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, 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.
Operating Conditions
Parameter Symbol
Min
Max
Unit
Supply voltage (note 1)
V
DD
0.8 5.5
V
Operating Temperature
T
A
-40
+125 C
Electrical Characteristics
Unless otherwise specified: V
DD
= 0.8V to 5.5V, T
A
=+25C (note 1).
Parameter Symbol
Conditions
Min
Typ
Max
Unit
+25C -
4.5
V
DD
=1.5V
-40C to +125C
-
2.1
7
+25C -
5.4
V
DD
=3.3V
-40C to +125C
-
2.7
8.3
+25C -
6.3
Supply current (note 2)
I
DD
V
DD
=5.0V
-40C to +125C
-
3.2
9.6
A
EM6352 1.3
1.290
1.31
1.330
EM6352 1.4
1.359
1.38
1.401
EM6352 1.6
1.546
1.57
1.594
EM6352 1.7
1.635
1.66
1.685
EM6352 1.8
1.773
1.80
1.827
EM6352 2.2
2.167
2.20
2.233
EM6352 2.26
2.226
2.26
2.294
EM6352 2.6
2.591
2.63
2.669
EM6352 2.9
2.886
2.93
2.974
EM6352 3.1
3.034
3.08
3.126
EM6352 4.4
4.334
4.40
4.466
Threshold voltage
(note 3)
V
TH
EM6352 4.6
4.561
4.63
4.699
V
Threshold voltage
temperature coefficient
(note 4)
A
TH
T
V
T
A
= -40C to +125C
-
50
- ppm/C
Threshold hysteresis
V
HYS
-
2.1%
V
TH
- V
Note 1: Production tested at +25C only. Over temperature limits are guaranteed by design, not production tested.
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:
C
25
T
V
T
V
)
T
T
(
V
A
TH
A
TH
A
TH
-
=
=
Example:
for version V
TH
=2.93V, variation at T
A
=70C is equal to V
TH
(70C)=50
10
-6
x 2.93 x (70-25)=6.59mV
EM6352
Copyright
2006, EM Microelectronic-Marin SA
03/06 rev.I
4
www.emmicroelectronic.com
Electrical Characteristics
(continued)
Unless otherwise specified: V
DD
= 0.8V to 5.5V, T
A
=+25 C (note 1).
Parameter Symbol Conditions Min
Typ
Max
Unit
Reset timeout period
t
POR
V
DD
from 0V to V
TH (typ)
+15% (note 2)
9
500 1090
s
Propagation delay time
V
DD
to
RESET
(RESET) delay
t
P
V
DD
drops from V
TH (typ)
+0.2V to V
TH (typ)
-0.2V
(note 2)
2 130
255
s
V
DD
>1V
I
OL
=100
A
- - 0.3
-40C to +125C
V
DD
>2.5V I
OL
=1.5mA - - 0.3
Open-drain
RESET
output
Voltage
V
OL
V
DD
>5V I
OL
=3mA -
-
0.3
V
V
DD
>1V
I
OL
=100
A
- - 0.3
-40C to +125C
V
DD
>2.5V I
OL
=1.5mA - - 0.3
V
OL
V
DD
>5V I
OL
=3mA -
-
0.3
V
DD
>1V
I
OH
=-30
A
0.8 - -
-40C to +125C
V
DD
>2.5V I
OH
=-1.5mA 2 - -
Push-pull RESET /
RESET
Output voltage
V
OH
V
DD
>5V
I
OH
=-3mA 4 - -
V
Output leakage current
I
LEAK
-40C to +125C, only for EM6352Y (open-drain)
-
-
0.5
A
Note 1: Production tested at +25C only. Over temperature limits are guaranteed by design, not production tested.
V
DD
min=0.9V for active-high version (EM6352Z).
Note 2:
RESET
(RESET)
open.
Timing Waveforms
RESET
V
DD
0.8V
V
TH
t
t
logic "1"
logic "0"
t
SEN
t
logic "1"
logic "0"
RESET
t
POR
t
P
V
HYS
RESET
Overdrive
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.
EM6352
Copyright
2006, EM Microelectronic-Marin SA
03/06 rev.I
5
www.emmicroelectronic.com
Typical Operating Characteristics
(Typical values are at T
A
=+25C unless otherwise noted,
RESET
or RESET open.)
I
DD
vs. Temperature
Propagation Time t
P
vs. Temperature
Reset Timeout Period t
POR
vs. Temperature
Maximum Transient Duration t
SEN
vs. Overdrive V
TH
-V
DD
Threshold Voltage Variation vs. Temperature (normalized)
0
500
1000
1500
2000
2500
-50 -25
0
25
50
75 100 125
[ C ]
[ us ]
0
50
100
150
200
250
300
350
400
1
10
100
1000
[ mV ]
[ us ]
Reset occurs
above this line
0
1
2
3
4
5
6
7
-50
-25
0
25
50
75
100 125
[ C ]
[ uA ]
V
DD
3 . 3 V
V
DD
5 . 0 V
V
DD
1 . 5 V
0
50
100
150
200
250
300
-50 -25
0
25
50
75
100 125
[ C ]
[ us ]
[C]
-8%
-6%
-4%
-2%
0%
2%
4%
6%
8%
-50
-25
0
25
50
75
100
125
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