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掳C 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 2.7碌A make the EM6352 an ideal choice
for portable and battery-operated devices.
EM6352
Features
!
!
!
!
Ultra-low supply current of 2.7碌A (V
DD
=3.3V)
Operating temperature range: -40掳C to +125掳C
卤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
!
!
!
!
!
!
Typical Application
V
DD
V
DD
RESET
*
V
DD
RESET
Applications
!
!
!
!
!
!
!
!
!
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
Mobile and cordless phones
Modems
Printers
TV, VCR, Video sets
GPS
Toys
Basestations
NiCd cell battery
Automotive systems
Block Diagram
V
DD
Voltage
Reference
SOT23-5L
RESET 1
(RESET)
V
DD
2
4 GND
3 NC
GND
RESET
(RESET)
SOT23-3L
1
3 V
DD
2
-
+
RESET
(RESET)
SC70-4L
(SC-82AB)
SC70-3L
GND
Pin Description
SOT23-5L
Pin
SOT23-3L
SC70-4L
SC70-3L
Name
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
RESET
1
1
1
2
RESET
2
3
4, 5
3
2
-
2
4
3
3
1
-
V
DD
GND
N.C.
Copyright
漏
2006, EM Microelectronic-Marin SA
03/06 鈥?rev.I
1
www.emmicroelectronic.com
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