参数资料
| 型号： | X4005S8I-4.5A |
| 厂商： | Intersil |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR CPU I2C 8-SOIC |
| 标准包装： | 100 |
| 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： | 最小为 100 ms |
| 电压 - 阀值： | 4.62V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
X4003, X4005
Principles of Operation
Power-on Reset
Application of power to the X4003/X4005 activates a power-on
reset circuit that pulls the RESET/RESET pin active. This signal
provides several benefits:
SCL
SDA
0.6μs
0.6μs
? It prevents the system microprocessor from starting to
operate with insufficient voltage.
START
CONDITION
RESTART
STOP
CONDITION
? It prevents the processor from operating prior to
stabilization of the oscillator.
? It allows time for an FPGA to download its configuration
prior to initialization of the circuit.
When V CC exceeds the device V TRIP threshold value for
200ms (nominal) the circuit releases RESET/RESET, allowing
the system to begin operation.
Low Voltage Monitoring
During operation, the X4003/X4005 monitors the V CC level
and asserts RESET/RESET if supply voltage falls below a
preset minimum V TRIP . The RESET/RESET signal prevents
the microprocessor from operating in a power fail or
brownout condition. The RESET/RESET signal remains
active until the voltage drops below 1V. It also remains active
until V CC returns and exceeds V TRIP for 200ms.
Watchdog Timer
The watchdog timer circuit monitors the microprocessor
activity by monitoring the SDA and SCL pins. The
microprocessor must toggle the SDA pin HIGH to LOW
periodically, while SCL also toggles from HIGH to LOW (this
is a start bit) followed by a stop condition prior to the
expiration of the watchdog time-out period to prevent a
RESET/RESET signal. The state of two nonvolatile control
bits in the control register determine the watchdog timer
period. The microprocessor can change these watchdog
bits, or they may be “locked” by tying the WP pin HIGH.
FIGURE 1. WATCHDOG RESTART
V CC Threshold Reset Procedure
The X4003/X4005 is shipped with a standard V CC threshold
(V TRIP ) voltage. This value will not change over normal
operating and storage conditions. However, in applications
where the standard V TRIP is not exactly right, or if higher
precision is needed in the V TRIP value, the X4003/X4005
threshold may be adjusted. The procedure is described in
the following and uses the application of a nonvolatile control
signal.
Setting the V TRIP Voltage
This procedure is used to set the V TRIP to a higher voltage
value. For example, if the current V TRIP is 4.4V and the new
V TRIP is 4.6V, this procedure will directly make the change. If
the new setting is to be lower than the current setting, then it
is necessary to reset the trip point before setting the new
value.
To set the new V TRIP voltage, apply the desired V TRIP
threshold voltage to the V CC pin and tie the WP pin to the
programming voltage V P . Then write data 00hto address
01h. The stop bit following a valid write operation initiates the
V TRIP programing sequence. Bring WP LOW to complete the
operation.
WP
V P = 15V TO 18V
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
SCL
SDA
A0h
01h
00h
FIGURE 2. SET V TRIP LEVEL SEQUENCE (V CC = DESIRED V TRIP VALUE)
4
FN8113.2
June 30, 2008
相关PDF资料 |
PDF描述 |
|---|---|
| X40239S16I-BT1 | IC VOLTAGE MON TRPL EE 16-SOIC |
| X40415V8I-CT1 | IC VOLTAGE MON DUAL W/SUP 8TSSOP |
| X40421V14I-CT1 | IC VOLT MON DUAL SUP/SW 14-TSSOP |
| X40435V14I-CT1 | IC VOLT MON TRPL EEPROM 14-TSSOP |
| X4045S8T1 | IC SUPERVISOR CPU 4K EE 8-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| X4005S8IZ | 功能描述:IC SUPERVISOR CPU I2C 8-SOIC 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) |
| X4005S8IZ-2.7 | 功能描述:IC SUPERVISOR CPU I2C 8-SOIC 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) |
| X4005S8IZ-2.7A | 功能描述:IC SUPERVISOR CPU I2C 8-SOIC 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) |
| X4005S8IZ-4.5A | 功能描述:IC SUPERVISOR CPU I2C 8-SOIC 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) |
| X4005S8Z | 功能描述:IC SUPERVISOR CPU I2C 8-SOIC 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) |
发布紧急采购，3分钟左右您将得到回复。