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IMP707CPA 参数 Datasheet PDF下载

IMP707CPA图片预览
型号: IMP707CPA
PDF下载: 下载PDF文件 查看货源
内容描述: 低功耗μP监控电路 [LOW-POWER レP SUPERVISOR CIRCUITS]
分类和应用: 监控
文件页数/大小: 9 页 / 167 K
品牌: IMP [ IMP, INC ]
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IMP705/6/7/8, 8 13L
P
OWER
M
ANAGEMENT
Low-Power µP Supervisor Circuits
Watc hdog timer
Br o wnout det ection
Po w er suppl y monit or
Key Features
N
Improved replacements for the Maxim
MAX705/6/7/8, MAX813L
– 140µA maximum supply current
– 60% improvement
N
Precision power supply monitor
– 4.65V threshold (IMP705/707/813L)
– 4.40V threshold (IMP706/8)
N
Debounced manual reset input
N
Voltage monitor
– 1.25V threshold
– Battery monitor/Auxiliary supply monitor
N
Watchdog timer (IMP705/706/813L)
N
200ms reset pulse width
N
Active HIGH reset output (IMP707/708/813L)
N
MicroSO package
The IMP705/706/707/708 and IMP813L CMOS supervisor circuits
monitor power-supply and battery voltage level, and
µP/µC
operation.
Compared to pin-compatible devices offered by Maxim Integrated
Products, IMP devices feature 60 percent lower maximum supply current.
The family offers several functional options. Each device generates a
reset signal during power-up, power-down and during brownout
conditions. A reset is generated when the supply drops below
4.65V (IMP705/707/813L) or 4.40V (IMP706/708). For 3V power supply
applications, refer to the IMP705P/R/S/T data sheet. In addition, the
IMP705/706/813L feature a 1.6 second watchdog timer. The IMP707/708
have both active-HIGH and active-LOW reset outputs but no watchdog
function. The IMP813L has the same pin-out and functions as the IMP705
but has an active-HIGH reset output. A versatile power-fail circuit has a
1.25V threshold, useful in checking battery levels and non-5V supplies. All
devices have a manual reset (MR) input. The watchdog timer output will
trigger a reset if connected to MR.
All devices are available in 8-pin DIP, SO and MicroSO packages.
Applications
N
N
N
N
N
Computers and embedded controllers
Battery-operated systems
Intelligent instruments
Wireless communication systems
PDAs and handheld equipment
Block Diagrams
WDI
V
CC
Transition
Detector
Watchdog
Timer
WDO
RESET
V
CC
0.25mA
Timebase
0.25mA
MR
V
CC
+
+
RESET
Generator
RESET
(RESET)
(IMP813L)
MR
V
CC
+
+
4.65V (IMP707)
4.40V (IMP708)
RESET
Generator
RESET
4.65V (IMP705/813L)
4.40V (IMP706)
PFI
+
IMP705
IMP706
IMP813L
1.25V
PFO
PFI
1.25V
+
PFO
IMP707
IMP708
GND
705_01.eps
705_02.eps
GND
©
1999 IMP, Inc.
408-432-9100/www.impweb.com
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