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MAX6321HPUK37AY+T

更新时间： 2024-02-25 20:53:01
品牌 Logo 应用领域
美信 - MAXIM 光电二极管
页数 文件大小 规格书
14页 1516K
描述
Power Supply Management Circuit, Fixed, 1 Channel, PDSO5, SOT-23, 5 PIN

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MAX6321HPUK37AY+T 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Contact Manufacturer包装说明：LSSOP, TSOP5/6,.11,37
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.32
其他特性：RESET THRESHOLD VOLTAGE IS 2.7V可调阈值：NO
模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码：R-PDSO-G5
JESD-609代码：e3长度：2.9 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：5
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：LSSOP
封装等效代码：TSOP5/6,.11,37封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, LOW PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：225
电源：3/5 V认证状态：Not Qualified
座面最大高度：1.45 mm子类别：Power Management Circuits
最大供电电流 (Isup)：0.02 mA最大供电电压 (Vsup)：5.5 V
最小供电电压 (Vsup)：1 V标称供电电压 (Vsup)：1.2 V
表面贴装：YES温度等级：AUTOMOTIVE
端子面层：MATTE TIN端子形式：GULL WING
端子节距：0.95 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：1.625 mm
Base Number Matches：1

MAX6321HPUK37AY+T 数据手册

 浏览型号MAX6321HPUK37AY+T的Datasheet PDF文件第4页浏览型号MAX6321HPUK37AY+T的Datasheet PDF文件第5页浏览型号MAX6321HPUK37AY+T的Datasheet PDF文件第6页浏览型号MAX6321HPUK37AY+T的Datasheet PDF文件第8页浏览型号MAX6321HPUK37AY+T的Datasheet PDF文件第9页浏览型号MAX6321HPUK37AY+T的Datasheet PDF文件第10页 
MAX6316–MAX6322  
5-Pin μP Supervisory Circuits with  
Watchdog and Manual Reset  
is erased and processing begins from scratch. If, on the  
other hand, RESET is high after a delay of two external-  
clock cycles, the processor knows that it caused the reset  
itself and can jump to a different vector and use stored-  
state information to determine what caused the reset.  
Bidirectional RESET Output  
The  
MAX6316M/MAX6318MH/MAX6319MH  
are  
designed to interface with μPs that have bidirectional  
reset pins, such as the Motorola 68HC11. Like an open-  
drain output, these devices allow the μP or other devices  
to pull the bidirectional reset (RESET) low and assert a  
reset condition. However, unlike a standard open-drain  
output, it includes the commonly specified 4.7kΩ pullup  
resistor with a P-channel active pullup in parallel.  
A problem occurs with faster μPs; two external-clock  
cycles are only 500ns at 4MHz. When there are several  
devices on the reset line, and only a passive pullup resis-  
tor is used, the input capacitance and stray capacitance  
can prevent RESET from reaching the logic high state  
This configuration allows the MAX6316M/MAX6318MH/  
MAX6319MH to solve a problem associated with μPs that  
have bidirectional reset pins in systems where several  
devices connect to RESET (Figure 3). These μPs can  
often determine if a reset was asserted by an external  
device (i.e., the supervisor IC) or by the μP itself (due to  
a watchdog fault, clock error, or other source), and then  
jump to a vector appropriate for the source of the reset.  
However, if the μP does assert reset, it does not retain the  
information, but must determine the cause after the reset  
has occurred.  
(0.85 x V ) in the time allowed. If this happens, all resets  
CC  
will be interpreted as external. The μP output stage is  
guaranteed to sink 1.6mA, so the rise time can not be  
reduced considerably by decreasing the 4.7kΩ internal  
pullup resistance. See Bidirectional Pullup Characteristics  
in the Typical Operating Characteristics.  
The MAX6316M/MAX6318MH/MAX6319MH overcome  
this problem with an active pullup FET in parallel with the  
4.7kΩ resistor (Figures 4 and 5). The pullup transistor  
holds RESET high until the μP reset I/O or the supervi-  
sory circuit itself forces the line low. Once RESET goes  
The following procedure describes how this is done in  
the Motorola 68HC11. In all cases of reset, the μP pulls  
RESET low for about four external-clock cycles. It then  
releases RESET, waits for two external-clock cycles, then  
checks RESET’s state. If RESET is still low, the μP con-  
cludes that the source of the reset was external and, when  
RESET eventually reaches the high state, it jumps to the  
normal reset vector. In this case, stored-state information  
below V  
, a comparator sets the transition edge flip-  
PTH  
flop, indicating that the next transition for RESET will be  
low to high. When RESET is released, the 4.7kΩ resistor  
pulls RESET up toward V . Once RESET rises above  
CC  
V
but is below (0.85 x V ), the active P-channel  
PTH  
CC  
pullup turns on. Once RESET rises above (0.85 x V  
)
CC  
or the 2μs one-shot times out, the active pullup turns  
off. The parallel combination of the 4.7kΩ pullup and the  
V
CC  
V
CC  
WDI*  
MR**  
4.7kΩ  
68HC11  
RESET  
CIRCUITRY  
RESET  
RESET  
RESET  
RESET  
CIRCUITRY  
RESET***  
C
IN  
C
STRAY  
C
IN  
MAX6316M  
MAX6318MH  
MAX6319MH  
C
IN  
OTHER DEVICES  
*
**  
MAX6316M/MAX6318MH  
MAX6316M/MAX6319MH  
***  
ACTIVE-HIGH PUSH/PULL MAX6318MH/MAX6319MH  
Figure 3. MAX6316M/MAX6318MH/MAX6319MH Supports Additional Devices on the Reset Bus  
Maxim Integrated  
│ 7  
www.maximintegrated.com  
1...45678910...14

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