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| 型号： | MAX6401BS31+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/9页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR MPU 4-UCSP |
| 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： | 推挽式，图腾柱 |
| 复位： | 高有效 |
| 复位超时： | 最小为 100 ms |
| 电压 - 阀值： | 3.08V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 4-WFBGA，CSPBGA |
| 供应商设备封装： | 4-UCSP（1.05x1.05） |
| 包装： | 带卷 (TR) |
μP Supervisory Circuits in 4-Bump (2 ? 2)
Chip-Scale Package
Pin Description
PIN
MAX6400/MAX6402
MAX6403/MAX6405
A1
MAX6401/MAX6404
A1
NAME
GND
Ground
FUNCTION
Active-Low Reset Output, (Open-Drain or Push-Pull). RESET
is asserted low when the V CC input is below the selected
B1
—
RESET
reset threshold. RESET remains low for the reset timeout
period after V CC exceeds the device reset threshold. Open-
drain outputs require an external pullup resistor.
Active-High Reset Output. RESET remains high while V CC is
—
B1
RESET
below the reset threshold and for at least 100ms after V CC
rises above the reset threshold.
Active-Low Manual Reset. Internal 50k ? pullup to V CC . Pull
B2
B2
MR
low to assert a reset. Reset remains asserted as long as MR
is low and for the reset timeout period after MR goes high.
Leave unconnected or connect to V CC if unused.
A2
A2
V CC
Supply Voltage and Input for the Reset Threshold Monitor
Detailed Description
Reset Output
A microprocessor ’ s (μP ’ s) reset input starts the μP in a
known state. These μP supervisory circuits assert reset
to prevent code execution errors during power-up,
power-down, or brownout conditions.
RESET is guaranteed to be a logic low for V CC down to
1V. Once V CC exceeds the reset threshold, an internal
timer keeps RESET low for the reset timeout period;
after this interval, RESET goes high.
If a brownout condition occurs (V CC dips below the
reset threshold), RESET goes low. Any time V CC goes
below the reset threshold, the internal timer resets to
zero, and RESET goes low. The internal timer starts
after V CC returns above the reset threshold, and RESET
remains low for the reset timeout period.
The manual reset input ( MR ) can also initiate a reset,
see the Manual Reset Input section. The MAX6401/
MAX6404 have active-high RESET outputs that are the
inverse of the MAX6400/MAX6402/MAX6403/MAX6405
outputs (Figure 1).
Manual Reset Input
Many μP-based products require manual reset capabil-
ity, allowing the operator, a test technician, or external
logic circuit to initiate a reset. A logic low on MR asserts
reset. Reset remains asserted while MR is low, and for
the reset active timeout period (t RP ) after MR returns
high. This input has an internal 50k ? pullup resistor, so
it can be left open if it is not used. MR can be driven
with TTL or CMOS logic levels, or with open-drain/col-
lector outputs. Connect a normally open momentary
switch from MR to GND to create a manual reset func-
tion; external debouncing circuitry is not required. If MR
is driven from long cables or if the device is used in a
noisy environment, connect a 0.1μF capacitor from MR
to ground to provide additional noise immunity (see
Figure 1).
Applications Information
Interfacing to μP with Bidirectional
Reset Pins
Since the RESET output on the MAX6402/MAX6405 is
open-drain, these devices interface easily with (μPs)
that have bidirectional reset pins. Connecting the μP
supervisor ’ s RESET output directly to the microcon-
troller ’ s (μC ’ s) RESET pin with a single pullup resistor
allows either device to assert reset (Figure 2).
Negative-Going VCC Transients
These devices are relatively immune to short-duration,
negative-going V CC transients (glitches).
The Typical Operating Characteristics show the
Maximum Transient Duration vs. Reset Threshold
Overdrive graph, for which reset pulses are not gener-
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6402BS22 | 制造商:Maxim Integrated Products 功能描述:UP SUPERVISORY CIRCUIT IN 4-BUMP 2X - Rail/Tube |
| MAX6402BS22+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.2V 1UA 4UCSP - Rail/Tube |
| MAX6402BS22+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 |
| MAX6402BS22-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 |
| MAX6402BS23 | 制造商:Maxim Integrated Products 功能描述:UP SUPERVISORY CIRCUIT IN 4-BUMP 2X - Rail/Tube |
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