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參數(shù)資料
| 型號： | LTC694CN8-3.3#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8 |
| 封裝： | 0.300 INCH, LEAD FREE, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 189K |
| 代理商： | LTC694CN8-3.3#TRPBF |
LTC694-3.3/LTC695-3.3
1
69453fb
TYPICAL APPLICATION
FEATURES
DESCRIPTION
3.3V Microprocessor
Supervisory Circuits
The LTC694-3.3/LTC695-3.3 provide complete 3.3V power
supply monitoring and battery control functions. These
include power-on reset, battery back-up, RAM write pro-
tection, power failure warning and watchdog timing. The
devices are pin compatible upgrades of the LTC694/LTC695
that are optimized for 3.3V systems. Operating power
consumption has been reduced to 0.6mW (typical) and
3μW maximum in battery back-up mode. Microprocessor
reset and memory write protection are provided when the
supply falls below 2.9V. The RESET output is guaranteed
to remain logic low with VCC as low as 1V.
The LTC694-3.3/LTC695-3.3 power the active RAMs with
a charge pumped NMOS power switch to achieve low
dropout and low supply current. When primary power is
lost, auxiliary power, connected to the battery input pin,
powers the RAMs in standby through an efficient PMOS
switch.
For an early warning of impending power failure, the
LTC694-3.3/LTC695-3.3 provide an internal comparator
with a user-defined threshold. An internal watchdog timer
is also available, which forces the reset pins to active states
when the watchdog input is not toggled prior to a preset
timeout period.
RESET Output Voltage
vs Supply Voltage
APPLICATIONS
n Guaranteed Reset Assertion at VCC = 1V
n Pin Compatible with LTC694/LTC695 for 3.3V Systems
n 200μA Typical Supply Current
n Fast (30ns Typ) Onboard Gating of
RAM Chip Enable Signals
n SO-8 and S16 Packages
n 2.90V Precision Voltage Monitor
n Power OK/Reset Time Delay: 200ms or Adjustable
n Minimum External Component Count
n 1μA Maximum Standby Current
n Voltage Monitor for Power-Fail or
Low-Battery Warning
n Thermal Limiting
n Performance Specified Over Temperature
n 3.3V Low Power Systems
n Critical μP Power Monitoring
n Intelligent Instruments
n Battery-Powered Computers and Controllers
n Automotive Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
1μF
VIN ≥ 5V
3.3V
100μF
0.1μF
μP
POWER
POWER TO
CMOS RAM
μP
SYSTEM
0.1μF
2.4V
51k
18k
694/5-3.3 TA01
MICROPROCESSOR RESET, BATTERY BACK-UP,
RAM WRITE PROTECTION, POWER WARNING AND
WATCHDOG TIMING ARE ALL IN A SINGLE CHIP
FOR 3.3V MICROPROCESSOR SYSTEM
LTC695-3.3
VBATT
PFI
VOUT
VCC
GND
DECODER OUTPUT
RAM CS
μP RESET
μP NMI
I/O LINE
CE IN
CE OUT
RESET
PFO
WDI
0.1μF
100Ω
GND
VIN
VOUT
LT1129-3.3
OUT SENSE
SHDN
+
SUPPLY VOLTAGE (V)
0
RESET
OUTPUT
VOLTAGE
(V)
3
4
5
4
2
1
0
1
2
3
5
694/5-3.3 TA02
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC695CN-3.3#TRPBF | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP16 |
| LTC695IS | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| LTC691IS | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| LTC691CS | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| LTC6992HDCB-2#TRPBF | 0.02 A SWITCHING CONTROLLER, PDSO6 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC694CN8PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
| LTC694CN8-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
| LTC694CS-3.3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Power Supply Supervisor |
| LTC694CS8 | 功能描述:IC MPU SUPERVISORY CIRCUIT 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:簡單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:高有效 復(fù)位超時:- 電壓 - 閥值:1.8V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-TSOP（0.059"，1.50mm 寬）5 引線 供應(yīng)商設(shè)備封裝:5-TSOP 包裝:剪切帶 (CT) 其它名稱:NCP301HSN18T1GOSCT |
| LTC694CS8#PBF | 功能描述:IC MPU SUPERVISORY CIRCUIT 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 其它有關(guān)文件:STM6905 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 類型:多壓監(jiān)控器 監(jiān)視電壓數(shù)目:5 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時:最小為 140 ms 電壓 - 閥值:2.188V，2.955V，可調(diào)，可調(diào)，可調(diào) 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1197 (CN2011-ZH PDF) 其它名稱:497-8728-6 |
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