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参数资料
| 型号： | TL7770-12CDWRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | GREEN, PLASTIC, SOIC-16 |
| 文件页数： | 1/19页 |
| 文件大小： | 603K |
| 代理商： | TL7770-12CDWRG4 |
TL7770-5, TL7770-12
DUAL POWER-SUPPLY SUPERVISORS
SLVS019F – OCTOBER 1987 – REVISED JULY 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Power-On Reset Generator
D Automatic Reset Generation After Voltage
Drop
D RESET Defined When VCC Exceeds 1 V
D Wide Supply-Voltage Range . . . 3.5 V
to 18 V
D Precision Overvoltage and Undervoltage
Sensing
D 250-mA Peak Output Current for Driving
SCR Gates
D 2-mA Active-Low SCR Gate Drive for
False-Trigger Protection
D Temperature-Compensated Voltage
Reference
D True and Complementary Reset Outputs
D Externally Adjustable Output Pulse
Duration
description
The TL7770 is an integrated-circuit system supervisor designed for use as a reset controller in microcomputer
and microprocessor power-supply systems. This device contains two independent supply-voltage supervisors
that monitor the supplies for overvoltage and undervoltage conditions at the VSO and VSU terminals,
respectively. When VCC attains the minimum voltage of 1 V during power up, the RESET output becomes active
(low). As VCC approaches 3.5 V, the time-delay function activates, latching RESET and RESET active (high and
low, respectively) for a time delay (td) after system voltages have achieved normal levels. Above VCC = 3.5 V,
taking RESIN low activates the time-delay function during normal system-voltage levels. To ensure that the
microcomputer system has reset, the outputs remain active until the voltage at VSU exceeds the threshold
value, VIT+, for a time delay, which is determined by an external timing capacitor such that:
t
d
[ 20
103
capacitance
where td is in seconds and capacitance is in farads.
The overvoltage-detection circuit is programmable for a wide range of designs. During an overvoltage condition,
an internal silicon-controlled rectifier (SCR) is triggered, providing 250-mA peak instantaneous current and
25-mA continuous current to the SCR gate drive terminal, which can drive an external high-current SCR gate
or an overvoltage-warning circuit.
The TL7770C series is characterized for operation from 0
°C to 70°C. The TL7770I series is characterized for
operation from –40
°C to 85°C.
Copyright
1999, 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.
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.
DW OR N PACKAGE
(TOP VIEW)
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2
3
4
5
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7
8
16
15
14
13
12
11
10
9
1RESIN
1CT
1RESET
1VSU
1VSO
1SCR DRIVE
GND
VCC
2RESIN
2CT
2RESET
2VSU
2VSO
2SCR DRIVE
相关PDF资料 |
PDF描述 |
|---|---|
| TL7770-5CDWE4 | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| TL7770-12CDWE4 | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| TL7770-5CNE4 | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP16 |
| 5962-9095501MRX | LOG OR ANTILOG AMPLIFIER, 145 MHz BAND WIDTH, CDIP20 |
| 5962-9095501M2X | LOG OR ANTILOG AMPLIFIER, 145 MHz BAND WIDTH, CQCC20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TL7770-12CN | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TL7770-12DW | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL POWER-SUPPLY SUPERVISORS |
| TL7770-12MJB | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL POWER-SUPPLY SUPERVISORS |
| TL7770-12N | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL POWER-SUPPLY SUPERVISORS |
| TL7770-12Y | 制造商:TI 制造商全称:Texas Instruments 功能描述:DUAL POWER-SUPPLY SUPERVISORS |
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