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| 型号： | EM6324LYSP5B2.9 |
| 厂商： | EM Microelectronic |
| 英文描述： | Reset Circuit with Manual Reset and Watchdog |
| 中文描述： | 复位电路，带有手动复位和看门狗 |
| 文件页数： | 1/10页 |
| 文件大小： | 511K |
| 代理商： | EM6324LYSP5B2.9 |
EM MICROELECTRONIC
- MARIN SA
EM6323/24
Copyright
2006, EM Microelectronic-Marin SA
03/06 - rev.H
1
www.emmicroelectronic.com
Reset Circuit with Manual Reset and Watchdog
Description
The EM6323/24 are low power, high precision reset ICs
featuring a manual reset and a watchdog inputs. They have
different threshold voltages and several timeout reset periods
(t
POR
) and watchdog timeout periods (t
WD
) for maximum
flexibility in the application. EM6323 has a manual reset (
MR
with internal pull-up) and a watchdog input pins. EM6324 has
only a watchdog input pin (WDI). The watchdog function can
be disabled by driving WDI with a three-state driver or by
leaving WDI unconnected. This is useful when the MCU is in
sleep mode.
Small SOT23-5L package as well as ultra-low supply current
of 3.8μA make the EM6323 and the EM6324 an ideal choice
for portable and battery-operated devices.
Typical Application
V
DD
WDI
GND
RESET
MR
EM632x
V
DD
I/O
GND
RESET
MPU, DSP
V
DD
GND
*
*
R
EXT
for open-drain version only
RESET
RESET
Fig. 1
Block Diagram
Fig. 2
Pin Description
SOT23-5L
EM6323 EM6324
Features
Ultra-low supply current of 3.8μA (V
DD
=3.3V)
!
Operating temperature range: -40°C to +125°C
±
1.5% reset threshold accuracy
11 reset threshold voltages V
TH
: 4.63V, 4.4V, 3.08V,
2.93V, 2.63V, 2.2V, 1.8V, 1.66V, 1.57V, 1.38V, 1.31V
200ms reset timeout period (1.6ms, 25ms, 1600ms on
request)
1.6s watchdog timeout period (6.2ms, 102ms, 25.6s on
request)
3 reset output options:
Active-low
RESET
push-pull
Active-low
RESET
open-drain
Active-high
RESET
push-pull
Detection of microcontroller in sleep mode
Applications
Workstations
Point of sales (POS)
Personal computers
Routers, hubs and switches
Handheld GPS
Vending machines and ATM
Automotive systems
Pin Configuration
(manual reset,
watchdog)
EM6324
(watchdog)
!
!
!
!
!
!
!
!
!
!
!
!
!
!
Fig. 3
Name
Function
1
1
RESET
GND
Active-low
RESET
output (push-pull or open-drain)
Ground
2
2
3
-
MR
Manual Reset input with an internal pull-up 30k
resistor. Reset remains active as long as
MR
is low
and for t
POR
after returns high.
MR
can be driven with a CMOS output or shorted to ground with a switch
Active-high RESET output (push-pull)
Watchdog input. WDI must be driven with a CMOS output. If the microcontroller I/O is put in a high
impedance condition, the circuit will detect this condition as a microcontroller in sleep mode and prevent
its watchdog from timing out
Supply Voltage (5.5V max.)
-
3
RESET
4
4
WDI
5
5
V
DD
SOT23-5
top view
1
3
2
5
4
E
EM6323
RESET
RESET
MR
V
DD
WDI
GND
SOT23-5
top view
1
3
2
5
4
E
V
DD
WDI
GND
push-pull/open-drain
V
DD
GND
+
-
Voltage
MR
Reset
Logic
+ Timer
WDI
Detector
Wat+ Timer
Oscillator
Filter
RESET
RESET
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| EM6324LYSP5B3.1 | Reset Circuit with Manual Reset and Watchdog |
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相关代理商/技术参数 |
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|---|---|
| EM6324LYSP5B3.1 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Reset Circuit with Manual Reset and Watchdog |
| EM6324LYSP5B4.4 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Reset Circuit with Manual Reset and Watchdog |
| EM6324LYSP5B4.6 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Reset Circuit with Manual Reset and Watchdog |
| EM6324LZSP5B1.3 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Reset Circuit with Manual Reset and Watchdog |
| EM6324LZSP5B1.4 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Reset Circuit with Manual Reset and Watchdog |
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