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參數(shù)資料
| 型號： | ADM690-ADM695 |
| 英文描述： | Microprocessor Supervisory Circuits |
| 中文描述： | 微處理器監(jiān)控電路 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 283K |
| 代理商： | ADM690-ADM695 |
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
Mcroprocessor
Supervisory Circuits
ADM690–ADM695
FEATURES
Superior Upgrade for MAX690–MAX695
Specified Over Temperature
Low Power Consumption (5 mW)
Precision Voltage Monitor
Reset Assertion Down to 1 V V
CC
Low Switch On-Resistance 1.5
V
Normal,
20
V
in Backup
High Current Drive (100 mA)
Watchdog Timer—100 ms, 1.6 s, or Adjustable
600 nA Standby Current
Automatic Battery Backup Power Switching
Extremely Fast Gating of Chip Enable Signals (5 ns)
Voltage Monitor for Power Fail
APPLICATIONS
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems
GE NE RAL DE SCRIPT ION
T he ADM690–ADM695 family of supervisory circuits offers
complete single chip solutions for power supply monitoring and
battery control functions in microprocessor systems. T hese
functions include
μ
P reset, backup battery switchover, watchdog
timer, CMOS RAM write protection, and power failure warn-
ing. T he complete family provides a variety of configurations to
satisfy most microprocessor system requirements.
T he ADM690, ADM692 and ADM694 are available in 8-pin
DIP packages and provide:
1. Power-on reset output during power-up, power-down and
brownout conditions. T he
RESET
output remains opera-
tional with V
CC
as low as 1 V.
2. Battery backup switching for CMOS RAM, CMOS
microprocessor or other low power logic.
3. A reset pulse if the optional watchdog timer has not been
toggled within a specified time.
4. A 1.3 V threshold detector for power fail warning, low battery
detection, or to monitor a power supply other than +5 V.
T he ADM691, ADM693 and ADM695 are available in 16-pin
DIP and small outline packages and provide three additional
functions.
1. Write protection of CMOS RAM or EEPROM.
2. Adjustable reset and watchdog timeout periods.
3. Separate watchdog timeout, backup battery switchover, and
low V
CC
status outputs.
T he ADM690–ADM695 family is fabricated using an advanced
epitaxial CMOS process combining low power consumption
(5 mW), extremely fast Chip Enable gating (5 ns) and high reli-
ability.
RESET
assertion is guaranteed with V
CC
as low as 1 V.
In addition, the power switching circuitry is designed for mini-
mal voltage drop thereby permitting increased output current
drive of up to 100 mA without the need for an external pass
transistor.
FUNCT IONAL BLOCK DIAGRAMS
4.65V
1
WATCHDOG
TRANSITION DETECTOR
1.3V
ADM691
ADM693
ADM695
V
OUT
V
BATT
V
CC
WATCHDOG
INPUT (WDI)
POWER FAIL
INPUT (PFI)
1
VOLTAGE DETECTOR = 4.65V (ADM691, ADM695)
4.40V (ADM693)
POWER FAIL
OUTPUT (PFO)
RESET
WATCHDOG
TIMER
RESET &
WATCHDOG
TIMEBASE
RESET
GENERATOR
BATT ON
OSC IN
OSC SEL
WATCHDOG
OUTPUT (WDO)
RESET
LOW LINE
CE
OUT
CE
IN
4.65V
1
RESET
GENERATOR
2
WATCHDOG
TRANSITION DETECTOR
(1.6s)
1.3V
ADM690
ADM692
ADM694
V
OUT
V
BATT
V
CC
WATCHDOG
INPUT (WDI)
POWER FAIL
INPUT (PFI)
1
VOLTAGE DETECTOR = 4.65V (ADM690, ADM694)
4.40V (ADM692)
2
RESET PULSE WIDTH = 50ms (ADM690, ADM692)
200ms (ADM694)
POWER FAIL
OUTPUT (PFO)
RESET
Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
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| ADM690AN | 功能描述:IC SUPERVISOR MPU 4.65 WD 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:簡單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:高有效 復(fù)位超時:- 電壓 - 閥值:1.8V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-TSOP（0.059"，1.50mm 寬）5 引線 供應(yīng)商設(shè)備封裝:5-TSOP 包裝:剪切帶 (CT) 其它名稱:NCP301HSN18T1GOSCT |
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| ADM690ANZ | 制造商:Analog Devices 功能描述:Microprocessor Supervisor |
| ADM690AQ | 制造商:AD 制造商全稱:Analog Devices 功能描述:Microprocessor Supervisory Circuits |
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