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参数资料
| 型号： | ADM8691ARW |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/24页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVSR MPU 4.65V ADJ 16SOIC |
| 标准包装： | 47 |
| 类型： | 备用电池电路 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 35 ms |
| 电压 - 阀值： | 4.65V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
Data Sheet
provides a status output that goes low if the watchdog timer
times out and remains low until set high by the next transition
on the watchdog input. WDO is also set high when V CC goes
below the reset threshold.
ADM8690/ADM8691/ADM8695
CE GATING AND RAM WRITE PROTECTION
The ADM8691 / ADM8695 include memory protection circuitry
that ensures the integrity of data in memory by preventing write
operations when V CC is at an invalid level. Two additional pins
(CE IN and CE OUT ) can be used to control the chip enable or write
8
OSC SEL
inputs of CMOS RAM. When V CC is present, CE OUT is a buffered
replica of CE IN , with a 3 ns propagation delay. When V CC falls
CLOCK
0 TO 500kHz
7
ADM8691/
ADM8695
OSC IN
below the reset voltage threshold or V BATT , an internal gate forces
CE OUT high, independent of CE IN .
CE OUT typically drives the CE, CS, or write input of battery
backed-up CMOS RAM. This ensures the integrity of the data
Figure 17. External Clock Source
in memory by preventing write operations when V CC is at an
8
OSC SEL
ADM8691/
invalid level. Similar protection of EEPROMs can be achieved
using the CE OUT pin to drive the store or write inputs.
C OSC
7
ADM8695
OSC IN
CE IN
ADM8691/
ADM8695
CE OUT
Figure 18. External Capacitor
V CC LOW = 0
NC
8
OSC SEL
ADM8691/
V CC OK = 1
Figure 21. Chip Enable Gating
ADM8695
NC
7
OSC IN
V CC
V2
V1
V2
V1
Figure 19. Internal Oscillator (1.6 Second Watchdog)
NC
8
OSC SEL
RESET
t 1
t 1
ADM8691/
7
ADM8695
OSC IN
LOW LINE
Figure 20. Internal Oscillator (100 ms Watchdog)
CE IN
CE OUT
t1 = RESET TIME
V1 = RESET VOLTAGE THRESHOLD LOW
V2 = RESET VOLTAGE THRESHOLD HIGH
HYSTERESIS = V2 – V1
Figure 22. Chip Enable Timing
Rev. C | Page 13 of 24
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相关代理商/技术参数 |
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|---|---|
| ADM8691ARW-REEL | 功能描述:IC SUPERVSR MPU 4.65V ADJ 16SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| ADM8691ARWZ | 功能描述:IC SUPERVSR MPU 4.65V ADJ 16SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 其它有关文件:STM6717 View All Specifications 标准包装:1 系列:- 类型:多压监控器 监视电压数目:2 输出:开路漏极或开路集电极 复位:低有效 复位超时:最小为 600 ms 电压 - 阀值:1.11V，3.075V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:Digi-Reel® 产品目录页面:1194 (CN2011-ZH PDF) 其它名称:497-7019-6 |
| ADM8692 | 制造商:AD 制造商全称:Analog Devices 功能描述:Microprocessor Supervisory Circuits |
| ADM8692AN | 制造商:Analog Devices 功能描述:Processor Supervisor 4.4V 4.5V to 5.5V 8-Pin PDIP 制造商:Analog Devices 功能描述:IMPROVED ADM692 I.C. - Rail/Tube 制造商:Rochester Electronics LLC 功能描述:IMPROVED ADM692 I.C. - Bulk 制造商:Analog Devices 功能描述:IC SUPERVISORY CCT 8692 DIP8 |
| ADM8692ANZ | 制造商:Analog Devices 功能描述:Processor Supervisor 4.4V 4.5V to 5.5V 8-Pin PDIP 制造商:Analog Devices 功能描述:SUPERVISOR MICROPROCESSOR PDIP8 |
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