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TLC7733QPWRQ1 PDF预览

TLC7733QPWRQ1

更新时间: 2024-11-16 12:22:31
品牌 Logo 应用领域
德州仪器 - TI 监控
页数 文件大小 规格书
14页 217K
描述
MICROPOWER SUPPLY VOLTAGE SUPERVISORS

TLC7733QPWRQ1 数据手册

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TLC7701-Q1, TLC7705-Q1, TLC7733-Q1  
MICROPOWER SUPPLY VOLTAGE SUPERVISORS  
SGLS208A − OCTOBER 2003 − REVISED MAY 2008  
PW PACKAGE  
(TOP VIEW)  
D
D
D
Qualified for Automotive Applications  
Power-On Reset Generator  
Automatic Reset Generation After  
Voltage Drop  
CONTROL  
RESIN  
CT  
VDD  
1
2
3
4
8
7
6
5
SENSE  
RESET  
RESET  
D
Precision Voltage Sensor  
GND  
D
Temperature-Compensated Voltage  
Reference  
D
Programmable Delay Time by External  
Capacitor  
D
D
D
Supply Voltage Range . . . 2 V to 6 V  
Defined RESET Output from V 1 V  
DD  
Power-Down Control Support for Static  
RAM With Battery Backup  
D
Maximum Supply Current of 16 μA  
Power Saving Totem-Pole Outputs  
D
description  
The TLC77xx family of micropower supply voltage supervisors provide reset control, primarily in microcomputer  
and microprocessor systems.  
During power-on, RESET is asserted when V reaches 1 V. After minimum V (2 V) is established, the  
DD  
DD  
circuit monitors SENSE voltage and keeps the reset outputs active as long as SENSE voltage (V  
)
I(SENSE)  
remains below the threshold voltage. An internal timer delays return of the output to the inactive state to ensure  
proper system reset. The delay time, t , is determined by an external capacitor:  
d
4
t = 2.1 × 10 × C  
d
T
Where  
C is in farads  
T
t is in seconds  
d
Except for the TLC7701, which can be customized with two external resistors, each supervisor has a fixed  
SENSE threshold voltage set by an internal voltage divider. When SENSE voltage drops below the threshold  
voltage, the outputs become active and stay in that state until SENSE voltage returns above threshold voltage  
and the delay time, t , has expired.  
d
In addition to the power-on-reset and undervoltage-supervisor function, the TLC77xx adds power-down control  
support for static RAM. When CONTROL is tied to GND, RESET will act as active high. The voltage monitor  
contains additional logic intended for control of static memories with battery backup during power failure. By  
driving the chip select (CS) of the memory circuit with the RESET output of the TLC77xx and with the CONTROL  
driven by the memory bank select signal (CSH1) of the microprocessor (see Figure 10), the memory circuit is  
automatically disabled during a power loss. (In this application the TLC77xx power has to be supplied by the  
battery.)  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright © 2008, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

TLC7733QPWRQ1 替代型号

型号 品牌 替代类型 描述 数据表
TLC7733IPWR TI

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Micropower Supply Voltage Supervisors
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MICROPOWER SUPPLY VOLTAGE SUPERVISORS
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MICROPOWER SUPPLY VOLTAGE SUPERVISORS

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