参数资料
| 型号： | X4C105V20I |
| 厂商： | Intersil |
| 文件页数： | 3/14页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR NOVRAM/EE 20-TSSOP |
| 标准包装： | 75 |
| 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 100 ms |
| 电压 - 阀值： | 2.875V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
X4C105
Low Voltage Detection
When the internal low voltage detect circuitry senses that
V CC is low, several things happen:
? The RESET pin goes active.
? The contents of the SRAM are automatically saved to the
“shadow” EEPROM.
? Internal circuitry switches to provide power for the
AUTOSTORE operation from the CAP pin so the store
operation can complete even in the event of a catastrophic
power failure. To insure this, it is recommended that a
47μF capacitor be used on the CAP pin. The capacitor is
continuously charged during normal operation to provide
the necessary charge to complete the store operation.
Other internal circuits are turned off to minimize current
consumption during the store operations.
? Communication to the device is interrupted and any
command is aborted. If a serial nonvolatile store is in
progress when power fails, the operation is completed and
is followed by a NOVRAM AUTOSTORE cycle.
Capacitor Backup Circuit
The diagram in Figure 1 shows a representation of the
capacitor backup circuit.
Serial Interface
Serial Interface Conventions
The device supports a bidirectional bus oriented protocol.
The protocol defines any device that sends data onto the
bus as a transmitter, and the receiving device as the
receiver. The device controlling the transfer is called the
master and the device being controlled is called the slave.
The master always initiates data transfers, and provides the
clock for both transmit and receive operations. Therefore,
the devices in this family operate as slaves in all
applications.
Serial Clock and Data
Data states on the SDA line can change only during SCL
LOW. SDA state changes during SCL HIGH are reserved for
indicating start and stop conditions. See Figure 2.
Serial Start Condition
All commands are preceded by the start condition, which is a
HIGH to LOW transition of SDA when SCL is HIGH. The
device continuously monitors the SDA and SCL lines for the
start condition and will not respond to any command until
this condition has been met. See Figure 3.
TO INTERNAL
VOLTAGE SUPPLY
V CC
V TRIP
HIGH WHEN
V CC > V TRIP
LOW WHEN
V CC < V TRIP - 0.2V
START
NOVRAM
SCL
SDA
AUTOSTORE
FIGURE 1. CAPACITOR BACK-UP CIRCUIT
CAP
DATA STABLE
DATA CHANGE
DATA STABLE
FIGURE 2. VALID DATA CHANGES ON THE SDA BUS
3
FN8124.2
July 3, 2008
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相关代理商/技术参数 |
参数描述 |
|---|---|
| X4C105V20I-VTRIP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
| X4C105V20-VTRIP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EEPROM |
| X4C303N1CC | 制造商:SAIA - BURGESS ELECTRONICS INC. 功能描述:Catalogue / X4C303N1CC |
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| X4C303N8DM | 制造商:SAIA - BURGESS ELECTRONICS INC. 功能描述:Catalogue / X4C303N8DM |
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