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| 型号： | MAX6713LEXS+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/8页 |
| 文件大小： | 0K |
| 描述： | IC MPU/RESET CIRC SC70-4 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 简单复位/加电复位 |
| 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： | 最小为 140 ms |
| 电压 - 阀值： | 4.63V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-82A，SOT-343 |
| 供应商设备封装： | SC-70-4 |
| 包装： | 标准包装 |
| 产品目录页面： | 1417 (CN2011-ZH PDF) |
| 其它名称： | MAX6713LEXS+TDKR |
4-Pin SC70 Microprocessor Reset Circuits
with Manual Reset Input
V CC
+3.3V
+5.0V
V CC
V CC
V CC
V CC
MAX6713
RESET
RESET
INPUT
μ P
MOTOROLA
68HCXX
MAX6713
RESET
R PULLUP
RESET
INPUT
5V SYSTEM
MR
GND
GND
GND
GND
Figure 3. Interfacing to μPs with Bidirectional Reset I/O
maximum allowable pulse width decreases. Typically, for
the MAX671_L and MAX671_M, a V CC transient that
goes 100mV below the reset threshold and lasts 20μs or
less will not cause a reset pulse. A 0.1μF bypass capaci-
tor mounted as close as possible to the V CC pin provides
additional transient immunity.
Ensuring a Valid Reset Output
Down to V CC = 0
When V CC falls below 1V, the MAX6711 RESET output
no longer sinks current—it becomes an open circuit.
Therefore, high-impedance CMOS-logic inputs con-
nected to RESET can drift to undetermined voltages.
This presents no problem in most applications since
most μP and other circuitry is inoperative with V CC
below 1V. However, in applications where RESET must
be valid down to 0, adding a pull-down resistor to
RESET causes any stray leakage currents to flow to
ground, holding RESET low (Figure 2). R1’s value is not
critical; 100k ? is large enough not to load RESET and
small enough to pull RESET to ground.
A 100k ? pull-up resistor to V CC is also recommended
for the MAX6712 if RESET is required to remain valid for
V CC < 1V.
Interfacing to μPs with
Bidirectional Reset Pins
Since the RESET output on the MAX6713 is open-drain,
this device interfaces easily with μPs that have bidirec-
tional reset pins, such as the Motorola 68HC11.
Connecting the μP supervisor’s RESET output directly
to the μP’s RESET pin with a single pull-up resistor
allows either device to assert reset (Figure 3).
Figure 4. MAX6713 Open-Drain RESET Output Allows Use with
Multiple Supplies
MAX6713 Open-Drain RESET Output
Allows Use with Multiple Supplies
Generally, the pull-up connected to the MAX6713 will
connect to the supply voltage that is being monitored at
the IC’s V CC pin. However, some systems may use the
open-drain output to level-shift from the monitored sup-
ply to reset circuitry powered by some other supply
(Figure 4). Note that as the MAX6713’s V CC decreases
below 1V, so does the IC’s ability to sink current at
RESET . Also, with any pullup, RESET will be pulled high
as V CC decays toward 0. The voltage where this occurs
depends on the pull-up resistor value and the voltage
to which it is connected.
Benefits of Highly Accurate
Reset Threshold
Most μP supervisor ICs have reset threshold voltages
between 5% and 10% below the value of nominal sup-
ply voltages. This ensures a reset will not occur within
5% of the nominal supply, but will occur when the sup-
ply is 10% below nominal.
When using ICs rated at only the nominal supply ±5%,
a zone of uncertainty where the supply is between 5%
and 10% low, and where the reset may or may not be
asserted is left.
The MAX671_L/T/Z use highly accurate circuitry to
ensure that reset is asserted close to the 5% limit, and
long before the supply has declined to 10% below
nominal.
___________________Chip Information
TRANSISTOR COUNT: 380
6
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6713LEXS-T10 | 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 |
| MAX6713MEXS | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6713MEXS+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 4.38V 16UA 4PIN SC-70 - Rail/Tube |
| MAX6713MEXS+T | 功能描述:监控电路 4-Pin MPU Reset Circuit 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 |
| MAX6713MEXS+T10 | 功能描述:监控电路 4-Pin MPU Reset Circuit 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 |
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