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| 型号： | MAX6365LKA26+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU LP SOT23-8 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 备用电池电路 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 低有效 |
| 复位超时： | 最小为 150 ms |
| 电压 - 阀值： | 2.63V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 带卷 (TR) |
SOT23, Low-Power μP Supervisory Circuits
with Battery Backup and Chip-Enable Gating
Watchdog Software Considerations
One way to help the watchdog timer monitor the soft-
ware execution more closely is to set and reset the
watchdog at different points in the program rather than
pulsing the watchdog input periodically. Figure 4
shows a flow diagram in which the I/O driving the
watchdog is set low in the beginning of the program,
set high at the beginning of every subroutine or loop,
and set low again when the program returns to the
beginning. If the program should hang in any subrou-
tine, the problem would be quickly corrected.
Replacing the Backup Battery
When V CC is above V TH , the backup power source can
be removed without danger of triggering a reset pulse.
The device does not enter battery-backup mode when
V CC stays above the reset threshold voltage.
Negative-Going VCC Transients
These supervisors are relatively immune to short-dura-
when V CC experiences only small glitches is usually not
desirable.
The Typical Operating Characteristics section has a
Maximum Transient Duration vs. Reset Threshold
Overdrive graph for which reset is not asserted. The
graph was produced using negative-going V CC pulses,
starting at V CC and ending below the reset threshold by
the magnitude indicated (reset threshold overdrive).
The graph shows the maximum pulse width that a neg-
ative-going V CC transient can typically have without
triggering a reset pulse. As the amplitude of the tran-
sient increases (i.e., goes further below the reset
threshold), the maximum allowable pulse width
decreases. Typically, a V CC transient that goes 100mV
below the reset threshold and lasts for 30μs will not trig-
ger a reset pulse.
A 0.1μF bypass capacitor mounted close to the V CC
pin provides additional transient immunity.
tion, negative-going V CC transients. Resetting the μP
+2.4V TO +5.5V
START
0.1 μ F
V CC
BATT
BATT ON
OUT
CE OUT
CE
SET
WDI
LOW
MAX6367
CMOS RAM
SUBROUTINE
CE IN
ADDRESS
DECODE
A0–A15
OR PROGRAM LOOP
SET WDI
HIGH
μ P
GND
RESET
RESET
RETURN
Figure 3. MAX6367 BATT ON Driving an External Pass
Transistor
END
Figure 4. Watchdog Flow Diagram
______________________________________________________________________________________
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6365LKA29 | 制造商:Maxim Integrated Products 功能描述:LOW-POWER UP SUPERVISORY ICS WITH BATTERY BAC - Cut Tape Product |
| MAX6365LKA29+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.93V 15UA 8PIN SOT-23 - Rail/Tube |
| MAX6365LKA29+T | 功能描述:监控电路 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 |
| MAX6365LKA29-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 |
| MAX6365LKA31 | 制造商:Maxim Integrated Products 功能描述:LOW-POWER UP SUPERVISORY ICS WITH B - Cut Tape Product |
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