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參數(shù)資料
| 型號： | LTC690 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Microprocessor Supervisory Circuits(μP監(jiān)控電路) |
| 中文描述： | 微處理器監(jiān)控電路（微處理器監(jiān)控電路） |
| 文件頁數(shù)： | 5/16頁 |
| 文件大小： | 145K |
| 代理商： | LTC690 |
5
LTC 690/LTC 691
LTC 694/LTC 695
V
CC
:
5V Supply Input. The V
CC
pin should be bypassed
with a 0.1
μ
F capacitor.
V
OUT
:
Voltage Output for Backed Up Memory. Bypass with
a capacitor of 0.1
μ
F or greater. During normal operation,
V
OUT
obtains power from V
CC
through an NMOS power
switch, M1, which can deliver up to 50mA and has a typical
on resistance of 5
. When V
CC
is lower than V
BATT
, V
OUT
is internally switched to V
BATT
. If V
OUT
and V
BATT
are not
used, connect V
OUT
to V
CC
.
V
BATT
:
Back-Up Battery Input. When V
CC
falls below V
BATT
,
auxiliary power, connected to V
BATT
, is delivered to V
OUT
through PMOS switch, M2. If back-up battery or auxiliary
power is not used, V
BATT
should be connected to GND.
W
I
DAGRA
BLOCK
GND:
Ground pin.
BATT ON:
Battery On Logic Output from Comparator C2.
BATT ON goes low when V
OUT
is internally connected to
V
CC
. The output typically sinks 35mA and can provide base
drive for an external PNP transistor to increase the output
current above the 50mA rating of V
OUT
. BATT ON goes
high when V
OUT
is internally switched to V
BATT
.
PFI:
Power Failure Input. PFI is the noninverting input to
the power-fail comparator, C3. The inverting input is
internally connected to a 1.3V reference. The power failure
output remains high when PFI is above 1.3V and goes low
when PFI is below 1.3V. Connect PFI to GND or V
OUT
when
C3 is not used.
PI FU CTIO S
CHARGE
PUMP
M2
M1
VBATT
VCC
CE IN
PFI
OSC IN
OSC SEL
WDI
RESET PULSE
GENERATOR
WATCHDOG
TIMER
RESET
BATT ON
VOUT
C1
–
1.3V
GND
–
+
+
C2
OSC
TRANSITION
DETECTOR
–
+
C3
WDO
RESET
PFO
LOW LINE
CE OUT
690 BD
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC690_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Microprocessor Supervisory Circuits |
| LTC6900 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Power, 1kHz to 20MHz Resistor Set SOT-23 Oscillator |
| LTC6900CS5 | 制造商:Linear Technology 功能描述:LOW POWER, 1KHZ TO 20MHZ RESISTOR SET SOT-23 OSCILLATOR |
| LTC6900CS5#PBF | 制造商:Linear Technology 功能描述:IC, PRECISION OSC, 20MHZ, 5.5V, TSOT235; Operating Mode:-; Frequency:20MHz; Supply Voltage Min:2.7V; Supply Voltage Max:5.5V; Digital IC Case Style:TSOT-23; No. of Pins:5; Clock External Input:No; Operating Temperature Min:-40C ;RoHS Compliant: Yes |
| LTC6900CS5#TR | 功能描述:IC OSC SILICON 20MHZ TSOT23-5 RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 可編程計時器和振蕩器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:45 系列:- 類型:溫度 - 補償晶體振蕩器（TCXO） 計數(shù):- 頻率:25MHz 電源電壓:3.135 V ~ 3.465 V 電流 - 電源:1.5mA 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 包裝:管件 供應商設備封裝:16-SOIC W 安裝類型:表面貼裝 |
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