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參數(shù)資料
| 型號： | CAT1162PI-25 |
| 元件分類： | EEPROM |
| 英文描述： | I2C Serial EEPROM with Supervisory Features |
| 中文描述： | I2C串行EEPROM，帶有監(jiān)控功能 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 71K |
| 代理商： | CAT1162PI-25 |
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CAT1162PI-28 | I2C Serial EEPROM with Supervisory Features |
| CAT1162PI-30 | I2C Serial EEPROM with Supervisory Features |
| CAT1162PI-42 | I2C Serial EEPROM with Supervisory Features |
| CAT1162PI-45 | I2C Serial EEPROM with Supervisory Features |
| CAT22C10J-20 | NVRAM (EEPROM Based) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT1162PI-28 | 功能描述:監(jiān)控電路 16K I2C Mem w/Reset RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| CAT1162PI-30 | 功能描述:監(jiān)控電路 16K I2C Mem w/Reset RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| CAT1162PI-42 | 功能描述:監(jiān)控電路 16K I2C Mem w/Reset RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| CAT1162PI-45 | 功能描述:監(jiān)控電路 16K I2C Mem w/Reset RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| CAT1162W-30 | 制造商:Catalyst Semiconductor 功能描述: |
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