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參數資料
| 型號： | CAT24C023PI-25 |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數： | 8/12頁 |
| 文件大小： | 85K |
| 代理商： | CAT24C023PI-25 |
CAT24C163/083/043/023
5
Advanced
Doc. No. 25080-00 3/98 M-1
PIN DESCRIPTIONS
WDI: WATCHDOG INPUT
If there is no transition on the WDI for more than 1.6
seconds, the watchdog timer times out.
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 VSS
or left floating normal read/write operations are allowed
to the device.
SCL: SERIAL CLOCK
The serial clock input clocks all data transferred into or
out of 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. RESET pin must be connected
through a pull-down and
RESET pin must be connected
through a pull-up device.
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.
Reset Controller Description
The CAT24CXXX provides a precision RESET control-
ler that ensures correct system operation during brown-
out and power up/down conditions. It is configured
Figure 1. RESET Output Timing
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
reset outputs. At this point the reset outputs will be pulled
up or down by their respective pull up/pull down devices.
During power-down, the RESET outputs will begin driv-
ing 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 CAT24CXXX
can act as a signal conditioning circuit for an externally
applied reset. The inputs are level triggered; that is, the
RESET input in the 24CXXX will initiate a reset timeout
after detecting a high and the
RESET input in the
24CXXX will initiate a reset timeout after detecting a low.
Watchdog Timer
The Watchdog Timer provides an independent protec-
tion for microcontrollers. During a system failure, the
CAT24CXXX will respond with a reset signal after a
time-out interval of 1.6 seconds for a lack of activity. The
24CXX3 is designed with a WDI input pin for the Watch-
dog Timer function. For the 24CXX3, if the microcontroller
does not toggle the WDI 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 WDI.
As long as the reset signal is asserted, the Watchdog
Timer will not count and will stay cleared.
DEVICE OPERATION
GLITCH
t
VCC
PURST
t
PURST
t
RPD
t
RVALID
V
TH
RESET
RPD
t
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相關代理商/技術參數 |
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|---|---|
| CAT24C023PI25TE13 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer |
| CAT24C023PI-28TE13 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer |
| CAT24C023PI-30TE13 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer |
| CAT24C023PI-42TE13 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer |
| CAT24C023PI-45TE13 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:Supervisory Circuits with I2C Serial CMOS E2PROM, Precision Reset Controller and Watchdog Timer |
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