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PDF EM6353 Data sheet ( Hoja de datos )
| Número de pieza | EM6353 | |
| Descripción | Reset Circuit | |
| Fabricantes | EM Microelectronic - MARIN SA | |
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EM MICROELECTRONIC - MARIN SA
Reset Circuit with Fixed Delay
EM6353
www.DataSheet4U.com
Description
The EM6353 is an ultra-low current reset circuit 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 after a
fixed reset timeout period. The threshold defines the
minimum allowed voltage which guarantees the good
functionality of the system. When VDD rises above VTH, the
output remains active for an additional delay time. This
allows the system to stabilize before getting fully active.
The EM6353 features three output types: active-low push-
pull, active-low open-drain and active-high push-pull.
Small SC70-5L and SOT23-3L packages as well as ultra-low
supply current of 2.9µA make the EM6353 an ideal choice
for portable and battery-operated devices.
Typical Application
VDD
VDD
RESET
EM6353
* VDD
RESET
MPU, DSP
GND
GND
* REXT for open-drain version only
Pin Configuration (top view)
GND
GND 1
3 VDD
RESET
(RESET)
2
SOT23-3L
"beta" bonding
RESET
(RESET)
1
3 GND
VDD 2
SOT23-3L
"alpha" bonding
NC 1
VDD 2
NC 3
5 RESET
(RESET)
4 GND
GND 4
RESET
(RESET)
5
SC70-5L
(compatible with SC70-3 by rotating 180°)
3 NC
2 VDD
1 NC
Features
! 200ms reset timeout period (25ms on request)
! Ultra-low supply current of 2.9µA (VDD=3.3V)
! Operating temperature range: -40°C to +125°C
! ±1.5% reset threshold accuracy
! 11 reset threshold voltages VTH: 4.63V, 4.4V, 3.08V,
2.93V, 2.63V, 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
! Very small SOT23-3L and SC70-5L packages
Applications
! Mobile phones
! Set-top boxes
! Video, digital cameras, DVD players and recorders
! Modems
! Personal computers
! Switching hubs
! Copiers and fax
! Utility meters
! Automotive systems
Block Diagram
VDD
GND
Voltage
Reference
+
-
Oscillator
Reset
Logic
RESET
RESET
Pin Description
Pin
SOT23-3L SOT23-3L
“beta”
“alpha”
13
SC70-5L
4
2 15
3 22
- - 1,3
Name
GND
RESET
RESET
VDD
N.C.
Function
Ground
Active-low RESET output. RESET remains low for the reset timeout period
after all reset conditions are deasserted and then goes high.
Active-high RESET output. RESET remains high for the reset timeout period
after all reset conditions are deasserted and then goes low.
Supply Voltage (5.5V max.)
Not connected. Not internally connected.
Copyright © 2006, EM Microelectronic-Marin SA
03/06 – rev.K
1
www.emmicroelectronic.com
1 page  
EM6353
Electrical Characteristics (continued)
Unless otherwise specified: VDD= 0.8V to 5.5V, TA=-40°C to +125°C (note 1).
www.DataSheet4U.com
Parameter
Symbol
Conditions
Min Typ Max Unit
Reset timeout period
Propagation delay time
VDD to RESET (RESET) delay
Open-drain RESET output
Voltage
tPOR
VDD from 0V to VTH (typ)+15%
(note 2 and 4). TA= +25°C
EM6353B
EM6353A
tP
VDD drops from VTH (typ)+0.2V to VTH (typ)-0.2V
(note 2). TA= +25°C
VDD>1V
VOL VDD>2.5V
VDD>5V
IOL=100µA
IOL=1.5mA
IOL=3mA
155 200 224
ms
19.4 25
28
2 130 255 µs
- - 0.3
- - 0.3 V
- - 0.3
VDD>1V
VOL VDD>2.5V
IOL=100µA
IOL=1.5mA
- - 0.3
- - 0.3
Push-pull RESET / RESET
Output voltage
VDD>5V
VDD>1V
VOH VDD>2.5V
IOL=3mA
IOH=-30µA
IOH=-1.5mA
- - 0.35
V
0.8 -
-
2- -
VDD>5V
IOH=-3mA
4- -
Output leakage current
ILEAK Only for EM6353_Y (open-drain)
- - 0.5 µA
Note 1:
Note 2:
Note 4:
Production tested at +25°C only. Over temperature limits are guaranteed by design, not production tested.
VDD min=0.9V for active-high versions (EM6353_Z).
RESET (RESET) open.
Standard version is EM6353B (tPOR =200ms), available at all times. EM6353A (tPOR =25ms) is available by mask option and upon
minimum order quantity. Please contact EM sales.
Timing Waveforms
VDD
VTH
tSEN
Overdrive
VHYS
0.8V
logic "1"
RESET
logic "0"
tPOR
logic "1"
RREESSEETT
logic "0"
Note 6: tSEN = Maximum Transient Duration. Please refer to figure on next page.
Note 7: Overdrive = VTH- -VDD. Please refer to figure on next page.
Copyright © 2006, EM Microelectronic-Marin SA
03/06 – rev.K
5
t
tP
t
t
www.emmicroelectronic.com
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet EM6353.PDF ] | |
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