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参数资料
| 型号： | CAT1162J-28 |
| 英文描述： | 1.25A SCRS |
| 中文描述： | I2C串行EEPROM，带有监控功能 |
| 文件页数： | 8/12页 |
| 文件大小： | 71K |
| 代理商： | CAT1162J-28 |
5
CAT1161/2
Doc No. 3002, Rev. C
PIN DESCRIPTIONS
WP:
WRITE PROTECT
If the pin is tied to VCC the entire memory array
becomes Write Protected (READ only). When the pin
is tied to GND or left floating normal read/write
operations are allowed to the device.
RESET/
RESET
RESET: RESET I/O
These are open drain pins and can be used as reset
trigger inputs. By forcing a reset condition on the pins
the device will initiate and maintain a reset condition
for approximately 200ms. The RESET pin must be
connected through a pull-down resistor, and the
RESET pin must be connected through a pull-up
resistor.
SDA:
SERIAL DATA ADDRESS
The bidirectional serial data/address pin is used to
transfer all data into and out of the device. The SDA
pin is an open drain output and can be wire-ORed
with other open drain or open collector outputs.
If there is no transition on the SDA for more than 1.6
seconds, the watchdog timer times out.
SCL:
SERIAL CLOCK
Serial clock input.
DEVICE OPERATION
Reset Controller Description
The CAT1161/2 precision RESET controller ensures
correct system operation during brownout and power
up/down conditions. It is configured with open drain
RESET outputs. During power-up, the RESET outputs remain
active until VCC reaches the VTH threshold and will continue
driving the outputs for approximately 200ms (tPURST) after
reaching VTH. After the tPURST timeout interval, the device will
cease to drive the reset outputs. At this point the reset
outputs will be pulled up or down by their respective pull up/
down resistors. During power-down, the RESET outputs will
be active when VCC falls below VTH. The
RESET outputs will
be valid so long as VCC is >1.0V (VRVALID).
The RESET pins are I/Os; therefore, the CAT1161/2 can act
as a signal conditioning circuit for an externally applied
manual reset. The inputs are edge triggered; that is, the
RESET input in the CAT1161/2 will initiate a reset timeout
after detecting a low to high transition and the
RESET input
will initiate a reset timeout after detecting a high to low
transition.
Watchdog Timer
The Watchdog Timer provides an independent protection for
microcontrollers. During a system failure, the CAT1161will
respond with a reset signal after a time-out interval of 1.6
seconds for a lack of activity. The CAT1161 is designed with
the Watchdog Timer feature on the SDA input. If the
microcontroller does not toggle the SDA input pin within 1.6
seconds, the Watchdog Timer times out. This will generate
a reset condition on reset outputs. The Watchdog Timer is
cleared by any transition on SDA.
As long as the reset signal is asserted, the Watchdog Timer
will not count and will stay cleared.
The CAT1162 does not have a Watchdog.
Figure 1. RESET Output Timing
GLITCH
t
VCC
PURST
t
PURST
t
RPD
t
RVALID
V
TH
RESET
RPD
t
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT1162J-42 | 功能描述:监控电路 16K I2C Mem w/Reset RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| CAT1162J42TE13 | 制造商:ON Semiconductor 功能描述:Processor Supervisor 3V/3.3V/5V 8-Pin SOIC N T/R |
| CAT1162J-45 | 功能描述:监控电路 16K I2C Mem w/Reset RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| CAT1162J-45 TE13 | 制造商:ON Semiconductor 功能描述:Processor Supervisor 3V/3.3V/5V 8-Pin SOIC N T/R |
| CAT1162JI-28 | 功能描述:监控电路 16K I2C Mem w/Reset RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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