參數(shù)資料
型號(hào)： LTC693CS#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16
封裝： 0.300 INCH, PLASTIC, SOP-16
文件頁(yè)數(shù)： 3/20頁(yè)
文件大小： 244K
代理商： LTC693CS#TRPBF
LTC692/LTC693
11
0692fb
If battery connections are made through long wires, a
10Ω to 100Ω series resistor and a 0.1μF capacitor are
recommended to prevent any overshoot beyond VCC due
to the lead inductance (Figure 4).
Table 1 shows the state of each pin during battery backup.
When the battery switchover section is not used, connect
VBATT to GND and VOUT to VCC.
battery backed up CMOS RAM. CE OUT can also be used
to drive the Store or Write input of an EEPROM, EAROM
or NOVRAM to achieve similar protection. Figure 5 shows
the timing diagram of CE IN and CE OUT.
CE IN can be derived from the microprocessor’s address
decoder output. Figure 6 shows a typical nonvolatile CMOS
RAM application.
Memory protection can also be achieved with the LTC692
by using RESET as shown in Figure 7.
APPLICATIONS INFORMATION
3.9M
0.1μF
VBATT
LTC692
LTC693
GND
692_3 F04
10Ω
Figure 4. 10Ω/0.1μF Combination Eliminates Inductive
Overshoot and Prevents Spurious Resets During Battery
Replacement
Table 1. Input and Output Status in Battery Backup Mode
SIGNAL
STATUS
VCC
C2 monitors VCC for active switchover
VOUT
VOUT is connected to VBATT through an internal PMOS switch
VBATT
The supply current is 1μA maximum
BATT ON
Logic high. The open-circuit output voltage is equal to VOUT
PFI
Power failure input is ignored
PFO
Logic low
RESET
Logic low
RESET
Logic high. The open-circuit output voltage is equal to VOUT
LOW LINE Logic low
WDI
Watchdog input is ignored
WDO
Logic high. The open-circuit output voltage is equal to VOUT
CE IN
Chip Enable input is ignored
CE OUT
Logic high. The open-circuit output voltage is equal to VOUT
OSC IN
OSC IN is ignored
OSC SEL
OSC SEL is ignored
Memory Protection
The LTC693 includes memory protection circuitry which
ensures the integrity of the data in memory by preventing
write operations when VCC is at an invalid level. Two ad-
ditional pins, CE IN and CE OUT, control the Chip Enable
or Write inputs of CMOS RAM. When VCC is 5V, CE OUT
follows CE IN with a typical propagation delay of 20ns.
When VCC falls below the reset voltage threshold or VBATT,
CE OUT is forced high, independent of CE IN. CE OUT is
an alternative signal to drive the CE, CS, or Write input of
VCC
V1
CE IN
VOUT = VBATT
CE OUT
VOUT = VBATT
V2
V1 = RESET VOLTAGE THRESHOLD
V2 = RESET VOLTAGE THRESHOLD +
RESET THRESHOLD HYSTERESIS
692_3 F05
Figure 5. Timing Diagram for CE IN and CE OUT
相關(guān)PDF資料
PDF描述
LTC692CN8#TRPBF 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8
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LTM4600HVEV#TRPBF 17 A SWITCHING REGULATOR, BGA104
LV5682P 1-CHANNEL POWER SUPPLY SUPPORT CKT, ZFM25
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC693CSW 功能描述:IC MPU SUPERVISRY CIRCUIT 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 其它有關(guān)文件:STM6717 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:2 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時(shí):最小為 600 ms 電壓 - 閥值:1.11V，3.075V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1194 (CN2011-ZH PDF) 其它名稱:497-7019-6
LTC693CSW#PBF 功能描述:IC MPU SUPERVISRY CIRCUIT 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 其它有關(guān)文件:STM6717 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:2 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時(shí):最小為 600 ms 電壓 - 閥值:1.11V，3.075V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1194 (CN2011-ZH PDF) 其它名稱:497-7019-6
LTC693CSW#TR 功能描述:IC SUPERVISORY CIRC MPU 16SOIC 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(jiǎn)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(shí):- 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
LTC693CSW#TRPBF 功能描述:IC MPU SUPERVISRY CIRCUIT 16SOIC RoHS:是 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(jiǎn)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(shí):- 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
LTC693I 制造商:LINER 制造商全稱:Linear Technology 功能描述:Microprocessor Supervisory Circuits
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