參數(shù)資料
型號(hào)： 40430X
英文描述： 4kbit EEPROM, Triple Voltage Monitor with Integrated CPU Supervisor
中文描述： 4kbit的EEPROM，三電壓監(jiān)視器集成CPU監(jiān)控
文件頁(yè)數(shù)： 4/24頁(yè)
文件大小： 421K
代理商： 40430X
X40430/X40431 – Preliminary Information
Characteristics subject to change without notice.
4 of 24
REV 1.2.3 11/28/00
www.xicor.com
Low Voltage V
During operation, the X40430 monitors the V
and asserts RESET if supply voltage falls below a pre-
set minimum V
TRIP1
. The 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
for
t
PURST
.
CC
(V1 Monitoring)
CC
level
TRIP1
Low Voltage V2 Monitoring
The X40430 also monitors a second voltage level and
asserts V2FAIL if the voltage falls below a preset mini-
mum V
TRIP2
. The V2FAIL signal is either ORed with
RESET to prevent the microprocessor from operating
in a power fail or brownout condition or used to inter-
rupt the microprocessor with notification of an impend-
ing power failure. The V2FAIL signal remains active
until the V2MON drops below 1V (V2MON
falling). It
also remains active until V2MON returns and exceeds
V
TRIP2
by 0.2V.
Low Voltage V3 Monitoring
The X40430 also monitors a third voltage level and
asserts V3FAIL if the voltage falls below a preset mini-
mum V
TRIP3
. The V3FAIL signal is either ORed with
RESET to prevent the microprocessor from operating
in a power fail or brownout condition or used to inter-
rupt the microprocessor with notification of an impend-
ing power failure. The V3FAIL signal remains active
until the V3MON drops below 1V (V3MON falling). It
also remains active until V3MON returns and exceeds
V
TRIP3
by 0.2V.
Early Low V
This CMOS output goes LOW earlier than RESET/
RESET whenever V
CC
falls below the V
and returns high when V
CC
age. There is no power up delay circuitry (t
this pin.
CC
Detection (LOWLINE)
TRIP1
voltage
volt-
) on
exceeds the V
TRIP1
PURST
Figure 2. Two Uses of Multiple Voltage Monitoring
Unreg.
Supply
V
CC
5V
Reg
V2MON
X40430
Resistors selected so 3V appears on V2MON when unregulated
supply reaches 6V.
Unreg.
Supply
V
CC
X40431
RESET
V2FAIL
System
Reset
V
CC
RESET
V2FAIL
System
Reset
Notice:
No external components required to monitor three voltages.
R
R
V3MON
V3FAIL
V2MON
V3MON
V2MON
5V
Reg
4V
Reg
3V
Reg
V2MON
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