参数资料
型号: MAX6308EUK00D3+T
厂商: Maxim Integrated Products
文件页数: 5/11页
文件大小: 0K
描述: IC SUPERVISOR SOT23-5
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: 低有效
复位超时: 最小为 140 ms
电压 - 阀值: 可调节/可选择
工作温度: -40°C ~ 85°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)
5-Pin, Multiple-Input,
Programmable Reset ICs
______________________________________________________________Pin Description
PIN
MAX6305
MAX6308
MAX6311
MAX6306
MAX6309
MAX6312
MAX6307
MAX6310
MAX6313
NAME
FUNCTION
Active-Low, Open-Drain Reset Output for the MAX6305/MAX6306/
RESET
MAX6307. Active-Low, Push/Pull Reset Output (sources and sinks
1
1
1
RESET
current) for the MAX6308/MAX6309/MAX6310.
Active-High, Push/Pull Reset Output for the MAX6311/MAX6312/MAX6313
2
2
2
GND
System Ground
Manual-Reset Input. Pull low to force a reset. RESET /RESET remains
3
MR
active as long as MR is low and for the timeout period after MR
goes high. Leave unconnected or connect to V CC if unused.
3, 4
RST IN1,
RST IN2
Undervoltage Reset Comparator Input. Asserts reset when the
monitored voltage falls below the programmed threshold. Set the
reset threshold with an external resistor divider. Connect to V CC if
4
3
RST IN
unused.
Overvoltage Reset Comparator Input. Asserts reset when the monitored
4
OVRST IN
voltage exceeds the programmed threshold. Set the reset threshold
with an external resistor divider. Connect to GND if unused.
System Supply. The MAX6306/MAX6307/MAX6309/MAX6310/
5
5
5
V CC
MAX6312/MAX6313 also monitor V CC through an internal factory-
trimmed resistor divider to the reset comparator.
_______________Detailed Description
The MAX6305–MAX6313 CMOS microprocessor (μP)
supervisory circuits are designed to monitor more than
one power supply and issue a system reset when any
monitored supply falls out of regulation. The MAX6305/
MAX6308/MAX6311 have two adjustable undervoltage
reset inputs (RST IN1 and RST IN2). The MAX6306/
MAX6307/MAX6309/MAX6310/MAX6312/MAX6313 mon-
itor V CC through an internal, factory-trimmed voltage
divider. The MAX6306/MAX6309/MAX6312 have, in
addition, an adjustable undervoltage reset input and a
manual-reset input. The internal voltage divider sets the
reset threshold as specified in the device part number
(Table 1). The MAX6307/MAX6310/ MAX6313 feature an
adjustable undervoltage reset input (RST IN) and an
adjustable overvoltage reset input (OVRST IN) in addition
to the factory-trimmed reset threshold on the V CC moni-
tor. Program the adjustable reset inputs with an external
resistor divider (see Adjustable Reset Inputs section).
Reset Outputs
A 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 (MAX6305–MAX6310) and RESET (MAX6311/
MAX6312/MAX6313) are guaranteed to be asserted at
a valid logic level for V CC > 1V (see Electrical
Characteristics). Once all monitored voltages exceed
their programmed reset thresholds, an internal timer
keeps reset asserted for the reset timeout period (t RP );
after this interval, reset deasserts.
If a brownout condition occurs (any or all monitored volt-
ages dip outside their programmed reset threshold),
reset asserts (RESET goes high; RESET goes low). Any
time any of the monitored voltages dip below their reset
threshold, the internal timer resets to zero and reset
asserts. The internal timer starts when all of the moni-
tored voltages return above their reset thresholds, and
reset remains asserted for a reset timeout period. The
MAX6305/MAX6306/MAX6307 feature an active-low,
5
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