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UCC3946DR PDF预览

UCC3946DR

更新时间: 2024-09-19 19:53:07
品牌 Logo 应用领域
德州仪器 - TI 信息通信管理光电二极管
页数 文件大小 规格书
17页 670K
描述
1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8, PLASTIC, MS-012AA, SOIC-8

UCC3946DR 技术参数

生命周期:Obsolete零件包装代码:SOIC
包装说明:SOP, SOP8,.25针数:8
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.69
其他特性:RESET THRESHOLD VOLTAGE IS 1.235V可调阈值:YES
模拟集成电路 - 其他类型:POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码:R-PDSO-G8
长度:4.9 mm信道数量:1
功能数量:1端子数量:8
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:SOP
封装等效代码:SOP8,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE电源:2.5/5 V
认证状态:Not Qualified座面最大高度:1.75 mm
子类别:Power Management Circuits最大供电电流 (Isup):0.018 mA
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):2 V
表面贴装:YES技术:BICMOS
温度等级:COMMERCIAL端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
宽度:3.9 mmBase Number Matches:1

UCC3946DR 数据手册

 浏览型号UCC3946DR的Datasheet PDF文件第2页浏览型号UCC3946DR的Datasheet PDF文件第3页浏览型号UCC3946DR的Datasheet PDF文件第4页浏览型号UCC3946DR的Datasheet PDF文件第5页浏览型号UCC3946DR的Datasheet PDF文件第6页浏览型号UCC3946DR的Datasheet PDF文件第7页 
ꢀ ꢁꢁ ꢂꢃ ꢄꢅ  
ꢀ ꢁꢁ ꢆꢃ ꢄꢅ  
SLUS247F − APRIL 1997 − REVISED NOVEMBER 2007  
ꢇꢈ ꢁ ꢉꢊ ꢋꢉꢊ ꢁꢌ ꢍꢍꢊ ꢉ ꢍꢀꢋ ꢌꢉꢎꢈ ꢍꢊ ꢉ  
ꢏ ꢈ ꢐꢑ ꢏꢒꢐ ꢁꢑꢓꢊ ꢔ ꢐ ꢈꢇ ꢌꢉ  
FEATURES  
D
D
D
D
D
D
D
Fully Programmable Reset Threshold  
Fully Programmable Reset Period  
Fully Programmable Watchdog Period  
2% Accurate Reset Threshold  
Input Voltage Down to 2 V  
The UCCx946 is also resistant to glitches on the  
VDD line. Once RES has been deasserted, any  
drops below the threshold voltage need to be of  
certain time duration and voltage magnitude to  
generate a reset signal. These values are shown  
in Figure 1. An I/O line of the microprocessor may  
be tied to the watchdog input (WDI) for watchdog  
functions. If the I/O line is not toggled within a set  
watchdog period, programmable by the user,  
WDO is asserted. The watchdog function is  
disabled during reset conditions.  
Input 18-µA Maximum Input Current  
Reset Valid Down to 1 V  
DESCRIPTION  
The UCCx946 is designed to provide accurate  
microprocessor supervision, including reset and  
watchdog functions. During power up, the device  
asserts a reset signal RES with VDD as low as 1 V.  
The reset signal remains asserted until the VDD  
voltage rises and remains above the reset  
threshold for the reset period. Both reset threshold  
and reset period are programmable by the user.  
The UCCx946 is available in 8-pin SOIC(D), 8-pin  
PDIP (N) and 8-pin TSSOP(PW) packages to  
optimize board space.  
VDD  
8
POWER TO  
CIRCUITRY  
400 nA  
4
+
+
RP  
S
R
Q
Q
3
RES  
POWER ON RESET  
+
1.235 V  
Q
Q
S
R
2
6
RTH  
WP  
8−BIT  
COUNTER  
400 nA  
S
R
Q
Q
+
A3  
A2  
+
5
1
WDO  
GND  
100 mV  
CLR  
A1  
+
A0  
1.235 V  
CLK  
+
WATCHDOG  
TIMING  
EDGE DETECT  
7
WDI  
UDG−02192  
ꢐꢡ  
Copyright 2007, Texas Instruments Incorporated  
ꢝ ꢡ ꢞ ꢝꢖ ꢗꢫ ꢙꢘ ꢜ ꢤꢤ ꢢꢜ ꢚ ꢜ ꢛ ꢡ ꢝ ꢡ ꢚ ꢞ ꢦ  
1
www.ti.com  

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