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參數資料
| 型號： | MAX690A |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Microprocessor Supervisory Circuits(帶看門狗和電池開關的復位器,復位門限4.65V) |
| 中文描述： | 微處理器監控電路 |
| 文件頁數： | 1/12頁 |
| 文件大?。?/td> | 122K |
| 代理商： | MAX690A |
M
Mic roproc essor S upervisory Circ uits
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
1
2
3
4
8
7
6
5
V
BATT
RESET (RESET)
WDI
PFO
PFI
GND
V
CC
V
OUT
DIP/SO
TOP VIEW
MAX690A
MAX692A
MAX802L
MAX802M
MAX805L
( ) ARE FOR MAX805L ONLY.
_________________Pin Configurations
V
CC
NMI
I/OLINEGND
B
V
CC
CMOS
RAMGND
UNREGULATED DC REGULATED +5V
RESET
PFO
WDI
V
OUT
GND
V
BATT
V
CC
PFI
R
1
R
2
O.1
μ
F
3.6V
LITHIUM
BATTERY
MAX690A
MAX802L
μ
P
RESET
__________Typic al Operating Circ uit
19-4333; Rev 3; 9/93
__________________General Description
The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L
reduce the complexity and number of components
required for power-supply monitoring and battery-control
functions in microprocessor (μP) systems. They signifi-
cantly improve system reliability and accuracy compared
to separate ICs or discrete components.
These parts provide four functions:
1) A reset output during power-up, power-down, and
brownout conditions.
2) Battery-backup switching for CMOS RAM, CMOS
μP, or other low-power logic.
3) A reset pulse if the optional watchdog timer has not
been toggled within 1.6sec.
4) A 1.25V threshold detector for power-fail warning or
low-battery detection, or to monitor a power supply
other than +5V.
The parts differ in their reset-voltage threshold levels
and reset outputs. The MAX690A/MAX802L/MAX805L
generate a reset pulse when the supply voltage drops
below 4.65V, and the MAX692A/MAX802M generate a
reset below 4.40V. The MAX802L/MAX802M guaran-
tee power-fail accuracies to ±2%. The MAX805L is the
same as the MAX690A except that RESET is provided
instead of
RESET
.
All parts are available in 8-pin DIP and SO packages.
The MAX690A/MAX802L are pin compatible with the
MAX690 and MAX694. The MAX692A/MAX802M are
pin compatible with the MAX692.
_______________________Applic ations
Battery-Powered Computers and Controllers
Intelligent Instruments
Automotive Systems
Critical μP Power Monitoring
___________________________Features
o
Precision Supply-Voltage Monitor:
4.65V for MAX690A/MAX802L/MAX805L
4.40V for MAX692A/MAX802M
o
Reset Time Delay – 200ms
o
Watchdog Timer – 1.6sec Timeout
o
Battery-Backup Power Switching
o
200μA Quiescent Supply Current
o
50nA Quiescent Supply Current in Battery-
Backup Mode
o
Voltage Monitor for Power-Fail or Low-Battery
Warning
o
Power-Fail Accuracy Guaranteed to ±2%
(MAX802L/M)
o
Guaranteed
RESET
Assertion to V
CC
= 1V
o
8-Pin SO and DIP Packages
______________Ordering Information
PART
TEMP. RANGE
0°C to +70°C
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP**
MAX690A
CPA
MAX690ACSA
MAX690AC/D
MAX690AEPA
MAX690AESA
MAX690AMJ A
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
Ordering Information continued on last page.
* Dice are specified at T
= +25°C
**Contact factory for availability and processing to MIL-STD-883.
相關PDF資料 |
PDF描述 |
|---|---|
| MAX692A | Microprocessor Supervisory Circuits(帶看門狗和電池開關復位器,復位閾值4.40V) |
| MAX8069 | Low-Voltage Reference |
| MAX8069ESA | Low-Voltage Reference |
| MAX8069CCZQ | Low-Voltage Reference |
| MAX807MCUE | Full-Featured uP Supervisory Circuit with +/-1.5% Reset Accuracy |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX690AC/D | 功能描述:監控電路 RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX690ACPA | 功能描述:監控電路 RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX690ACPA+ | 功能描述:監控電路 MPU Supervisor RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX690ACSA | 功能描述:監控電路 RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX690ACSA+ | 功能描述:監控電路 MPU Supervisor RoHS:否 制造商:STMicroelectronics 監測電壓數: 監測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復位:Resettable 監視器:No Watchdog 電池備用開關:No Backup 上電復位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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