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參數(shù)資料
| 型號(hào)： | DS1312 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | 電源管理 |
| 英文描述： | Nonvolatile Controller with Lithium Battery Monitor(帶鋰電池監(jiān)控的非易失性控制器) |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDIP8 |
| 封裝： | 0.300 INCH, DIP-8 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大?。?/td> | 79K |
| 代理商： | DS1312 |
DS1312
022598 3/10
more, anytime BW is activated on the first battery test
after a power–up, data integrity should be checked via
checksum or other technique.
POWER MONITORING
DS1312S and DS1312E varieties have an additional
reset pin. These varieties detect out–of–tolerance
power supply conditions and warn a processor–based
system of impending power failure. When V
CCI
falls
below the trip point level defined by the TOL pin
(V
CCTP
), the V
CCI
comparator activates the reset signal
RST. Reset occurs in the range of 4.75 to 4.5 volts (5%
tolerance) when the TOL pin is connected to GND or in
the range of 4.5 to 4.25 volts (10% tolerance) when TOL
is connected to V
CCO
.
RST also serves as a power–on reset during power–up.
After V
CCI
exceeds V
CCTP
, RST will be held active for
200 ms nominal (t
RPU
). This reset period is sufficiently
long to prevent system operation during power–on tran-
sients and to allow t
REC
to expire. RST has an open–
drain output driver.
FRESHNESS SEAL MODE
When the battery is first attached to the DS1312 without
V
CC
power applied, the device does not immediately
provide battery–backup power on V
CCO
. Only after
V
CCI
exceeds V
CCTP
and later falls below both V
SW
and
V
BAT
will the DS1312 leave Freshness Seal Mode and
provide battery–backup power. This mode allows a bat-
tery to be attached during manufacturing but not used
until after the system has been activated for the first
time. As a result, no battery energy is drained during
storage and shipping.
FUNCTIONAL BLOCK DIAGRAM
Figure 1
BW
DELAY TIMING
CIRCUITRY
RST
CEI
CEO
TOL
1.2 M
+
–
V
CCTP
REF
V
CCI
+
–
V
SW
REF
+
–
+
–
BATTERY WARNING
CONTROL CIRCUITRY
+
–
CURRENT–LIMITING
RESISTOR
REDUNDANT LOGIC
V
BTP
REF
V
BAT
REDUNDANT
SERIES FET
V
CCO
BATTERY CHARGING/SHORTING
PROTECTION CIRCUITRY
(U.L. RECONGNIZED)
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|---|---|
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| DS1321 | Flexible Nonvolatile Controller with Lithium Battery Monitor(帶鋰電池監(jiān)控的靈活非易失性控制器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1312_04 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Nonvolatile Controller with Lithium Battery Monitor |
| DS1312+ | 制造商:Maxim Integrated Products 功能描述:CONTROLLER NV-BW & RST 8 PIN DIP LEAD FREE - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC CONTROLLER NV BW & RST 8DIP 制造商:Maxim Integrated Products 功能描述:Memory Controllers DIG SEXTET POT 20L 100K TSSOP |
| DS1312E | 功能描述:IC CONTROLLER NV BW/RST 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 存儲(chǔ)器 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:45 系列:- 控制器類型:靜態(tài) RAM（SRAM） 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件 |
| DS1312E/T&R | 制造商:Maxim Integrated Products 功能描述:NV CONTROLLER BW & RST 20-TSSOP T&R - Tape and Reel |
| DS1312E+ | 功能描述:IC CONTROLLER NV BW/RST 20-TSSOP RoHS:是 類別:集成電路 (IC) >> 存儲(chǔ)器 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:45 系列:- 控制器類型:靜態(tài) RAM（SRAM） 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件 |
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