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| 型号： | MAX16998DAUA/V+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC TIMER WATCHDOG 8UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 监视器电路 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
19-4000; Rev 2; 8/09
High-Voltage Watchdog Timers with
Adjustable Timeout Delay
General Description
The MAX16997/MAX16998 are microprocessor (μP)
supervisory circuits for high-input-voltage and low-qui-
escent-current applications. These devices detect
downstream circuit failures and provide switchover to
redundant circuitry. See the Selector Guide for the dif-
ferent versions of this product family.
The MAX16997/MAX16998 family has four independent
inputs for reset and watchdog functions. SWT and SRT
inputs independently set the timeout periods of watch-
dog and reset timers through external capacitors.
RESETIN/EN monitor voltages at respective inputs. A
resistive voltage-divider sets the reset threshold.
The MAX16998A/B/D generate two output signals,
RESET and ENABLE . RESET asserts whenever
RESETIN drops below its threshold voltage or when the
watchdog timer detects a timing fault at WDI. Once
asserted, and after all reset conditions are removed,
RESET remains low for the reset timeout period, t RESET ,
and then goes high. The MAX16997A generates one
output signal ( ENABLE ) based on the voltage level at
EN and the signal at WDI.
The MAX16997A does not have a RESET output. The
watchdog is disabled if the voltage at EN is below its
threshold. The MAX16997A watchdog timer starts tim-
Features
o Wide 5V to 40V Input Voltage Range
o 18 μ A Quiescent Current (Typical at +125°C)
o Capacitor-Adjustable Timeout Period for
Watchdog and Reset
o Windowed Watchdog Timer Options
(MAX16998B/D)
o External Voltage Monitoring (RESETIN for the
MAX16998A/B/D and EN for the MAX16997A)
o Car Battery-Compatible EN Input
o TTL- and CMOS-Compatible Open-Drain Outputs
o 18V Maximum Open-Drain Reset Output Voltage
o 28V Maximum Open-Drain Enable Output Voltage
o Power-On/Power-Off Reset Functionality
(MAX16998A/B/D Only)
o AEC-Q100 Qualified
o -40°C to +125°C Operating Temperature Range
o Small (3mm x 3mm) μ MAX Package
o WDI Narrow Pulse Immunity
Ordering Information
ing when the voltage at EN becomes higher than the
preset threshold voltage level. Each time EN rises
above the preset threshold voltage, the initial watchdog
timeout period is 8 times the normal watchdog timeout
period (t WP ).
The MAX16997/MAX16998 are available in 8-pin lead-
free μMAX ? packages and are fully specified over the
-40°C to +125°C automotive temperature range.
Applications
PART
MAX16997 AAUA+
MAX16997AAUA/V+
MAX16998 AAUA+
MAX16998AAUA/V+
MAX16998BAUA+
MAX16998BAUA/V+
MAX16998DAUA+
MAX16998DAUA/V+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-PACKAGE
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
Automotive
Industrial
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V Denotes Automotive qualified part.
Selector Guide
PART
MAX16997A
MAX16998A
MAX16998B
MAX16998D
WATCHDOG
WINDOW SIZE (%)
100
100
50
75
ENABLE
?
?
?
?
RESET
—
?
?
?
EN
?
—
—
—
RESETIN
—
?
?
?
Pin Configurations appear at end of data sheet.
μMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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| MAX16999AUA05+ | 功能描述:线性稳压器 - 标准 Low Out V Low-Q for High-Temp Aps RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| MAX16999AUA05+T | 功能描述:线性稳压器 - 标准 Low Out V Low-Q for High-Temp Aps RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| MAX16999AUA06+ | 功能描述:线性稳压器 - 标准 Low Out V Low-Q for High-Temp Aps RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| MAX16999AUA06+T | 功能描述:线性稳压器 - 标准 Low Out V Low-Q for High-Temp Aps RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| MAX16999AUA07+ | 功能描述:线性稳压器 - 标准 Low Out V Low-Q for High-Temp Aps RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
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