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參數資料
| 型號： | ADM809-5SCHIPS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | SRAM Nonvolatile Controller IC for 4 SRAM Banks 16-PDIP 0 to 70 |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| 封裝： | DIE |
| 文件頁數： | 5/6頁 |
| 文件大小： | 96K |
| 代理商： | ADM809-5SCHIPS |
ADM809-5S/L
–5–
REV. 0
INTERFACING TO OTHER DEVICES OUTPUT
The ADM809-5S/L is designed to integrate with as many devices
as possible and therefore has an output dependant on V
CC
.
Because of this design approach, interfacing this device to other
devices is simplified.
ENSURING A VALID RESET OUTPUT DOWN TO V
CC
= 0 V
When V
CC
falls below 0.8 V, ADM809-5S/L’s
RESET
no longer
sinks current. A high impedance CMOS logic input connected
to
RESET
may, therefore, drift to undetermined logic levels. To
eliminate this problem a 100 k
resistor should be connected
from
RESET
to ground.
V
CC
V
CC
GND
RESET
ADM809-5S/L
100k
Figure 3. Ensuring a Valid
RESET
Output Down to
V
CC
= 0 V
THE BENEFITS OF A VERY ACCURATE
RESET
THRESHOLD
In other microprocessor supervisory circuits, tolerances in supply
voltages lead to an overall increase in
RESET
tolerance levels
due to the deterioration of the microprocessor
RESET
circuit’s
power supply. The possibility of a malfunction during a power
failure is greatly reduced because the ADM809-5S/L series can
operate effectively even when there are large degradations of the
supply voltages. Another advantage of the ADM809-5S/L series
is its very accurate internal voltage reference circuit. These
benefits combine to produce an exceptionally reliable Voltage
Monitor Circuit.
INTERFACING TO MICROPROCESSORS WITH
MULTIPLE INTERRUPTS
In a number of cases it is necessary to interface many interrupts
from different devices (i.e., thermal, attitude, and velocity sen-
sors). The ADM809-5S/L can easily be integrated into existing
interrupt-handling circuits (Figure 6) or used as a stand-alone
device.
PRIORITY ENCODER
74LS147
4 LINE BCD
TO μP
V
CC
ADM809
GND
RESET
OTHER SENSING
DEVICES
V
CC
Figure 4. Interfacing to
μ
Ps with Multiple Interrupts
47k
47k
100nF
3.3V
V
CC
GND
RESET
ADM809-5S/L
Figure 5. Alternative Application Circuit with Extra
Decoupling
22k
100nF
3.3V
V
CC
GND
RESET
ADM809-5S/L
Figure 6. Additional Decoupling Can Be Achieved
Using a 100 nF Capacitor Between V
CC
and Ground
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM809-5SCSURF | 制造商:Analog Devices 功能描述: |
| ADM809-5SL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Microprocessor Supervisory Circuit |
| ADM809DF | 功能描述:IC SUPERVISOR P/P 制造商:analog devices inc. 系列:* 零件狀態:上次購買時間 標準包裝:1 |
| ADM809JAKS-REEL | 制造商:Analog Devices 功能描述:Processor Supervisor 4V 2.5V/3V/3.3V/5V 3-Pin SC-70 T/R 制造商:Analog Devices 功能描述:PROCESSOR SUPERVISOR 4V 60UA 3PIN SC-70 - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:MICROPROCESSOR SUPERVISOR IN SC70 I.C. - Tape and Reel |
| ADM809JAKS-REEL7 | 功能描述:IC SUPERVISOR P/P 4.0V SC70-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 監控器 系列:- 標準包裝:400 系列:- 類型:備用電池電路 監視電壓數目:1 輸出:開路漏極，推挽式 復位:高有效/低有效 復位超時:最小為 35 ms 電壓 - 閥值:4.65V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:16-SOIC W 包裝:帶卷 (TR) 其它名稱:ADM691ARZ-REEL7TR |
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