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参数资料
| 型号： | ISL88021IU8HFZ |
| 厂商： | Intersil |
| 文件页数： | 5/7页 |
| 文件大小： | 0K |
| 描述： | IC VOLT MONITOR TRPL 8-MSOP |
| 标准包装： | 80 |
| 类型： | 多压监控器 |
| 监视电压数目： | 3 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 3.09V，4.649V，可调 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
ISL88021, ISL88022
Manual Reset
The manual reset input (MR) allows the user to trigger a reset
by using a push-button switch or by signaling that pin low. The
MR input is an active low debounced input. By connecting a
push-button directly from MR to ground, the designer adds
manual system reset capability. Reset is asserted if the MR pin
is pulled low to less than 100mV for 1μs or longer while the
push-button is closed or a reset is signaled. After MR is
released, the reset outputs remain asserted for t POR . MR input
has an internal 20k Ω pull up resistor provided.
Figure 3 illustrates a typical application diagram for either IC
showing both reset outputs being used along with both a
manual and signalled reset configuration. The V DD and
V2MON thresholds are preset whereas the V3MON is capable
of UV (ISL88021) or OV (ISL88022) monitoring of a voltage
greater than or less than 0.6V, respectively.
TO DISPLAY
3.3V - 5V
ISL88021IU8HFZ
V DD
V2MON
RST
RST
TO μP
ISL88022IU8HFZ
1.8V - 3.3V
ISL88021
ISL88022
MR
PB
RESET
SIGNAL
V3MON
C POR
V MON > 0.6V
GND
FIGURE 3. TYPICAL APPLICATION DIAGRAM
Application Considerations
Follow good decoupling practices to prevent transients from
causing unwanted reset signaling due to switching noises
and short duration droops.
When using the C POR pin, reduce layout stray capacitance
on this pin to minimize effect on t POR timing. If no PCB
C POR pad is patterned, the t POR can be 160ms.
Using the ISL88021_22EVAL1 Platform
The ISL88021_22EVAL1 board is designed to provide both
immediate functional assessment and flexibility to the user.
Both ICs are the ‘HF’ variant having a V DD Vth of 4.64V, a
V2MON Vth of 3.09V and V3MON Vth of 0.6V. The top IC
position is the ISL88021 and is configured to monitor for
undervoltage (UV) compliance of a 5V, 3.3V and a 2.5V and
signaling the RESET and RESET outputs. The bottom
position is the ISL88022 variant, which is configured to
measure a 3.3V overvoltage (OV) in addition to UV on both
the 5V and 3.3V supplies. RESET and RESET is asserted for
at least t POR when these voltage go out of range. In both
cases V3MON interfaces with the monitored supply via a
simple resistor divider for comparison to the internal 0.6V
reference. A Manual Reset (MR) input is provided on both
ICs and is invoked by pulling this input LOW.
5
FIGURE 4. ISL88021_22EVAL1 SCHEMATIC AND PHOTO
MONITORED VOLTAGE RISING AND FALLING RAMP
THROUGH THE PROGRAMMED UV AND OV THRESHOLDS
RESET# RESPONDING TO
MONITORED VOLTAGE. C POR
PIN IS OPEN, t POR = 150ms
FIGURE 5. ISL88022EVAL1 3.3V UV AND OV DETECTION
FN8226.1
September 18, 2006
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相关代理商/技术参数 |
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| ISL88021IU8HFZ-TK | 功能描述:IC VOLTAGE MON TRIPLE UV 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 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:低有效 复位超时:最小为 600 ms 电压 - 阀值:3.8V 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:带卷 (TR) |
| ISL88022IU8FAZ | 功能描述:IC VOLT MONITOR TRPL 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 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:低有效 复位超时:最小为 600 ms 电压 - 阀值:3.8V 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:带卷 (TR) |
| ISL88022IU8FAZ-TK | 功能描述:IC VOLTAGE MON TRIPLE OV 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 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:低有效 复位超时:最小为 600 ms 电压 - 阀值:3.8V 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:带卷 (TR) |
| ISL88022IU8FCZ | 功能描述:IC VOLT MONITOR TRPL 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 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:低有效 复位超时:最小为 600 ms 电压 - 阀值:3.8V 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:带卷 (TR) |
| ISL88022IU8FCZ-TK | 功能描述:IC VOLTAGE MON TRIPLE OV 8-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 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:低有效 复位超时:最小为 600 ms 电压 - 阀值:3.8V 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:带卷 (TR) |
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