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X55020V20-2.7A PDF预览

X55020V20-2.7A

更新时间： 2024-11-27 19:52:31
品牌 Logo 应用领域
XICOR 光电二极管
页数 文件大小 规格书
22页 190K
描述
Power Supply Management Circuit, Adjustable, 2 Channel, PDSO20, PLASTIC, TSSOP-20

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X55020V20-2.7A 技术参数

生命周期：Obsolete包装说明：PLASTIC, TSSOP-20
Reach Compliance Code：unknown风险等级：5.84
其他特性：SELECTABLE WATCHDOG TIMER可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码：R-PDSO-G20
长度：6.5 mm信道数量：2
功能数量：1端子数量：20
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
认证状态：Not Qualified座面最大高度：1.2 mm
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：2.7 V
标称供电电压 (Vsup)：5 V表面贴装：YES
温度等级：COMMERCIAL端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
宽度：4.4 mmBase Number Matches：1

X55020V20-2.7A 数据手册

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Preliminary Information  
4K  
X55020  
Dual Voltage Monitor with Integrated System Battery Switch and EEPROM  
FEATURES  
DESCRIPTION  
• Dual voltage monitoring  
• System battery switch-over circuitry  
This device combines power-on reset control, battery  
switch circuit, watchdog timer, supply voltage supervi-  
sion, secondary voltage supervision, and 4Kbit serial  
EEPROM in one package. This combination lowers  
system cost, reduces board space requirements, and  
increases reliability.  
• Early warning low V  
fail indicator  
CC  
• Active high and active low reset outputs  
• Selectable watchdog timer  
—(0.15s, 0.4s, 0.8s, off)  
• Low V  
reset assertion  
—Four standard reset threshold voltages  
—Re-program V1  
(V1MON) and V2MON detection and  
CC  
Applying power to the device activates the power on  
reset circuit which holds RESET/RESET active for a  
period of time. This allows the power supply and oscilla-  
tor to stabilize before the processor can execute code.  
and V2  
reset threshold  
TRIP  
TRIP  
voltage using special programming sequence  
—Reset signal valid to V = 1V  
A system battery switch circuit compares V  
CC  
CC  
• Long battery life with low power consumption  
—<50µA max standby current, watchdog on  
—<30µA max standby current, watchdog off  
—<1.5mA max active current during read  
• 4Kbits of EEPROM  
(V1MON) with V  
whichever is higher. This provides voltage to external  
SRAM or other circuits in the event of main power fail-  
input and connects V  
to  
BATT  
OUT  
ure. The X55020 can drive 50mA from V  
and 250µA  
CC  
from V  
. The device switches to V  
when V  
BATT  
BATT CC  
• Built-in inadvertent write protection  
—Power-up/power-down protection circuitry  
—In circuit programmable ROM mode  
• 10MHz SPI interface modes (0,0 & 1,1)  
• Minimize EEPROM programming time  
—64-byte page write mode  
—Self-timed write cycle  
—5ms write cycle time (typical)  
• 2.7V to 5.5V power supply operation  
• Available packages  
—20-lead TSSOP  
drops below the low V voltage threshold and V  
.
CC  
BATT  
The Watchdog Timer provides an independent protec-  
tion mechanism for microcontrollers. When the micro-  
controller fails to restart a timer within a selectable  
time-out interval, the device activates the RESET/  
RESET signal. The user selects the interval from three  
preset values. Once selected, the interval does not  
change, even after cycling the power.  
The device’s low V  
detection circuitry protects the  
CC  
user’s system from low voltage conditions, resetting the  
system when V (V1MON) falls below the minimum  
CC  
V
trip point (V1  
). RESET/RESET is asserted  
CC  
TRIP  
until V  
returns to proper operating level and stabi-  
CC  
lizes. A second voltage monitor circuit tracks the unreg-  
ulated supply or monitors a second power supply  
voltage to provide a power fail warning. Xicor’s unique  
circuits allow the threshold for either voltage monitor to  
be reprogrammed to meet special needs or to fine-tune  
the threshold for applications requiring higher precision.  
Characteristics subject to change without notice. 1 of 22  
REV 1.0 6/27/00  
www.xicor.com  
1234567...22

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