EM MICROELECTRONIC-MARIN SA
EM6352
Voltage Detector, High-Precision
Description
Features
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°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 VDD stays above the threshold voltage,
the output stays inactive. If VDD drops below VTH, the output
goes active. The output is guaranteed to be in the correct
state for VDD 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.
!
!
!
!
Ultra-low supply current of 2.7µA (VDD=3.3V)
Operating temperature range: -40°C to +125°C
±1.5% reset threshold accuracy
12 reset threshold voltages VTH: 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 VDD transients
Guaranteed Reset valid down to 0.8V
Threshold hysteresis: 2.1% of VTH
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.
Very small SOT23-5L, SOT23-3L, SC70-3L and
SC70-4L (SC-82AB) packages
Typical Application
VDD
Applications
VDD
*
VDD
!
!
!
!
!
!
!
!
!
Mobile and cordless phones
RESET
RESET
Modems
EM6352
MPU, DSP
Printers
TV, VCR, Video sets
GPS
GND
GND
GND
REXT for open-drain version only
Toys
*
Basestations
NiCd cell battery
Automotive systems
Pin Configuration (top view)
RESET
(RESET)
RESET
(RESET)
1
2
3
5
1
NC
Block Diagram
3
VDD
VDD
VDD
4
GND
2
NC
GND
Voltage
Reference
SOT23-5L
SOT23-3L
-
RESET
RESET
(RESET)
1
2
4
1
GND
GND
NC
(RESET)
+
3 VDD
RESET
(RESET)
VDD
2
3
SC70-4L (SC-82AB)
SC70-3L
GND
Pin Description
Pin
SC70-4L
Function
Name
RESET
RESET
SOT23-5L
SOT23-3L
SC70-3L
Active-low RESET output. RESET remains low while VDD is
below the reset threshold voltage.
1
1
1
2
Active-high RESET output. RESET remains high while VDD is
below the reset threshold voltage.
2
3
4, 5
3
2
-
2
4
3
3
1
-
VDD
GND
N.C.
Supply Voltage (5.5V max.)
Ground
Not connected. Not internally connected
1
www.emmicroelectronic.com
Copyright © 2006, EM Microelectronic-Marin SA
03/06 – rev.I
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