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AME8500CEFTBD28

AME8500CEFTBD28首页预览图
型号: AME8500CEFTBD28
PDF文件:
  • AME8500CEFTBD28 PDF文件
  • AME8500CEFTBD28 PDF在线浏览
功能描述: UProcessor Supervisory
PDF文件大小: 410.61 Kbytes
PDF页数: 共14页
制造商: AME[Analog Microelectronics]
制造商LOGO: AME[Analog Microelectronics] LOGO
制造商网址: http://www.ame.com.tw/
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PDF页面索引
100%
AME, Inc.
1
AME8500 / 8501
µµ
µµ
µProcessor Supervisory
l Small packages: SOT-23, SOT-89
l 1 1 voltage threshold options
l Tight voltage threshold tolerance ---±1.50%
l 5 reset interval options
l 4 output configuration options
l Wide temperature range -------- -40
o
C to 85
o
C
l Low temperature coefficient --- 100ppm/
o
C(max)
l Low quiescent current < 3.0µA
l Thermal shutdown option (AME8501)
The AME8500 family allows the user to customize the
CPU reset function without any external components.
The user has a large choice of reset voltage thresholds,
reset time intervals, and output driver configurations, all
of which are preset at the factory . Each wafer is trimmed
to the customer's specifications.
These circuits monitor the power supply voltage of µP
based systems. When the power supply voltage drops
below the voltage threshold a reset is asserted immedi-
ately (within an interval T
D1
). The reset remains asserted
after the supply voltage rises above the voltage threshold
for a time interval, T
D2
. The reset output may be either
active high (RESET) or active low (RESETB). The reset
output may be configured as either push/pull or open
drain. The state of the reset output is guaranteed to be
correct for supply voltages greater than 1V .
The AME8501 includes all the above functionality plus
an overtemperature shutdown function. When the ambi-
ent temperature exceeds 80
o
C a reset is asserted and
remains asserted until the temperature falls below 60
o
C.
Space saving SOT23 packages and micropower qui-
escent current (<3.0µA) make this family a natural for
portable battery powered equipment.
n General Description
n Features
n Typical Operating Circuit
Note: * External pull-up resistor is required if open-
drain output is used. 10 kis recommended.
n Block Diagram
l Portable electronics
l Power supplies
l Computer peripherals
l Data acquisition systems
l Applications using CPUs
l Consumer electronics
n Applications
AME8500 with Push-Pull RESET
RESET
V
DD
GND
R1
R2
I1
V
REF
P1
N1
Delay
V
DD
GND
R1
R2
I1
V
REF
P1
N1
RESET
Delay
AME8500 with Push-Pull RESET
Processor
V
CC
GND
RESET
Input
AME8500
V
CC
GND
RESET / RESET
2
3
*
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