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参数资料
| 型号： | MAX6322HPUK29C-T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | IC MPU/RESET CIRC 2.93V SOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 2.93V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (TR) |
MAX6316–MAX6322
5-Pin μP Supervisory Circuits with
Watchdog and Manual Reset
V CC
t RST
MAX6316
V CC
RESET
t RP
t WD
t RP
MAX6318
MAX6319
WDI
MAX6316/MAX6317
MAX6318/MAX6320
MAX6321
GND
V CC
RESET
100k ?
Figure 7. Watchdog Timing Relationship
Figure 8. Ensuring RESET Valid to V CC = 0V on Active-Low
Push/Pull and Bidirectional Outputs
Applications Information
Watchdog Input Current
MAX6317
The WDI input is internally driven through a buffer and
series resistor from the watchdog counter. For minimum
watchdog input current (minimum overall power con-
sumption), leave WDI low for the majority of the watch-
dog timeout period. When high, WDI can draw as much
MAX6318
MAX6319
MAX6321*
MAX6322*
V CC
V CC
100k ?
as 160μA. Pulsing WDI high at a low duty cycle will
reduce the effect of the large input current. When WDI
is left unconnected, the watchdog timer is serviced
within the watchdog timeout period by a low-high-low
GND
RESET
pulse from the counter chain.
Negative-Going V CC Transients
These supervisors are immune to short-duration, nega-
tive-going V CC transients (glitches), which usually do
not require the entire system to shut down. Typically,
200ns large-amplitude pulses (from ground to V CC ) on
the supply will not cause a reset. Lower amplitude puls-
es result in greater immunity. Typically, a V CC transient
that goes 100mV under the reset threshold and lasts
less than 4μs will not trigger a reset. An optional 0.1μF
bypass capacitor mounted close to V CC provides addi-
tional transient immunity.
Ensuring Valid Reset Outputs
Down to V CC = 0V
The MAX6316_/MAX6317H/MAX6318_H/MAX6319_H/
MAX6321HP/MAX6322HP are guaranteed to operate
properly down to V CC = 1V. In applications that require
valid reset levels down to V CC = 0V, a pulldown resistor
to active-low outputs (push/pull and bidirectional only,
Figure 8) and a pullup resistor to active-high outputs
(push/pull only, Figure 9) will ensure that the reset line
is valid while the reset output can no longer sink or
10
*THIS SCHEMATIC DOES NOT WORK ON THE OPEN-DRAIN
OUTPUTS OF THE MAX6321/MAX6322.
Figure 9. Ensuring RESET Valid to V CC = 0V on Active-High
Push/Pull Outputs
source current. This scheme does not work with the
open-drain outputs of the MAX6320/MAX6321/MAX6322.
The resistor value used is not critical, but it must be
large enough not to load the reset output when V CC is
above the reset threshold. For most applications,
100k ? is adequate.
Watchdog Software Considerations
(MAX6316/MAX6317/MAX6318/
MAX6320/MAX6321)
One way to help the watchdog timer monitor software
execution more closely is to set and reset the watchdog
input at different points in the program, rather than
pulsing the watchdog input high-low-high or low-high-
low. This technique avoids a stuck loop, in which the
watchdog timer would continue to be reset inside the
loop, keeping the watchdog from timing out.
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
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| PCA2002TK-T | 功能描述:马达/运动/点火控制器和驱动器 WATCH IC RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| PCA2002U/10AA | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable output period and pulse width |
| PCA2002U/10AB/1 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:32 kHz watch circuit with programmable output period and pulse width |
| PCA2002U/10AB/1,00 | 功能描述:马达/运动/点火控制器和驱动器 32KHZ WATCH CIRCUIT RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| PCA2002U/10AB/1,005 | 制造商:NXP Semiconductors 功能描述: |
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