- 您现在的位置：买卖IC网 > PDF目录13575 > MAX6830TZUT+T (Maxim Integrated Products)IC MPU SUPERVISOR SOT23-6 PDF资料下载
参数资料
| 型号： | MAX6830TZUT+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC MPU SUPERVISOR SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 高有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 2.313V，3.08V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 包装： | 带卷 (TR) |
Dual Ultra-Low-Voltage SOT23 μP Supervisors
with Manual Reset and Watchdog Timer
V CC
t RST
V CC
V CC
RESET*
t RP
t WD
t RP
MAX6828
MAX6831 RESET
RESET
RESET
GENERATOR
μ P
WDI
GND
GND
*RESET IS THE INVERSE OF RESET.
Figure 4. Watchdog Timing Relationship
V MONITOR
Figure 6. Interfacing Open-Drain RESET to μPs with
Bidirectional Reset I/O
the maximum allowable leakage current is 10μA and the
maximum allowable load capacitance is 200pF.
R1
MAX6826
MAX6827
MAX6828
Adjustable Reset Thresholds
The MAX6826/MAX6827/MAX6828 provide a user
V MONITOR _ TRIP = 0 . 63 V ?
?
?
?
RSTIN
R2
V CC ≥ V RSTIN
Figure 5. Monitoring a Voltage
outputs. Connect a normally open momentary switch
from MR to GND to create a manual-reset function;
external debounce circuitry is not required. If MR is dri-
ven from long cables or the device is used in a noisy
environment, connect a 0.1μF capacitor from MR to
GND to provide additional noise immunity.
Watchdog Input
The watchdog circuit monitors the μP’s activity. If the
μP does not toggle (low to high or high to low) the
watchdog input (WDI) within the watchdog timeout peri-
od (1.6s nominal), reset asserts for the reset timeout
period. The internal 1.6s timer can be cleared by either
a reset pulse or by toggling WDI. The WDI can detect
pulses as short as 50ns. While reset is asserted, the
timer remains cleared and does not count. As soon as
reset is released, the timer starts counting (Figure 4).
Disable the watchdog function by leaving WDI uncon-
nected or by three-stating the driver connected to WDI.
The watchdog input is internally driven low during the
first 7/8 of the watchdog timeout period and high for the
last 1/8 of the watchdog timeout period. When WDI is left
unconnected, this internal driver clears the 1.6s timer
every 1.4s. When WDI is three-stated or unconnected,
adjustable input to monitor a second voltage. The
threshold voltage at RSTIN is typically 0.63V. To moni-
tor a voltage higher than 0.63V, connect a resistor-
divider to the circuit as shown in Figure 5. The
threshold at V MONITOR is:
? R 1 + R 2 ?
R 2
Note that RSTIN is powered by V CC , and its voltage
must therefore remain lower than V CC .
Applications Information
Watchdog Input Current
The WDI inputs are internally driven through a buffer
and series resistor from the watchdog timer (Figure 1).
When WDI is left unconnected, the watchdog timer is
serviced within the watchdog timeout period by a low-
high-low pulse from the counter chain. For minimum
watchdog input current (minimum overall power con-
sumption), leave WDI low for the majority of the watch-
dog timeout period, pulsing it low-high-low once within
the first 7/8 of the watchdog timeout period to reset the
watchdog timer. If WDI is externally driven high for the
majority of the timeout period, up to 160μA can flow into
WDI.
Interfacing to μPs
with Bidirectional Reset Pins
Since the RESET output on the MAX6828/MAX6831
is open drain, these devices interface easily with μPs
that have bidirectional reset pins, such as the Motorola
68HC11. Connecting the μP supervisor’s RESET output
_______________________________________________________________________________________
9
相关PDF资料 |
PDF描述 |
|---|---|
| 10YXF3300MEFCG412.5X25 | CAP ALUM 3300UF 10V 20% RADIAL |
| MAX6830SHUT+T | IC MPU SUPERVISOR SOT23-6 |
| MAX1833EUT#TG16 | IC REG BOOST SYNC 3.3V SOT23-6 |
| MAX6830VDUT+T | IC MPU SUPERVISOR SOT23-6 |
| 10YXF3300MEFC12.5X25 | CAP ALUM 3300UF 10V 20% RADIAL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6830VDUT | 制造商:Maxim Integrated Products 功能描述:DUAL ULTRA LOW VOLTAGE SOT23 MICROP - Cut Tape Product |
| MAX6830VDUT+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 1.575V/0.788V 10UA 6PIN SOT-23 - Rail/Tube |
| MAX6830VDUT+T | 功能描述:监控电路 Dual uPower Supervisor RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6830VDUT-T | 功能描述:监控电路 RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX6830VEUT | 制造商:Maxim Integrated Products 功能描述:DUAL ULTRA LOW VOLTAGE SOT23 MICROP - Cut Tape Product |
发布紧急采购，3分钟左右您将得到回复。