参数资料
| 型号： | X40414V8-A |
| 厂商： | Intersil |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | IC VOLTAGE MON DUAL W/SUP 8TSSOP |
| 标准包装： | 100 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 高有效/低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 1.3V，2.9V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 管件 |
X40410, X40411, X40414, X40415
PIN DESCRIPTION (Continued)
Pin
SOIC TSSOP Name
6 8 SCL
7 1 WDO
Function
Serial Clock. The Serial Clock controls the serial bus timing for data input and output.
WDO Output. WDO is an active LOW, open drain output which goes active whenever the watch-
dog timer goes active.
8
2
V CC
Supply Voltage
PRINCIPLES OF OPERATION
Power-On Reset
Application of power to the X40410/11/14/15 activates a
Power-on Reset Circuit that pulls the RESET/RESET
pins active. This signal provides several benefits.
– It prevents the system microprocessor from starting to
For the X40414/15 devices, the V2FAIL signal remains
actice until V CC drops below 1Vx and remains active
until V2MON returns and exceeds V TRIP2 . This sense
circuitry is powered by V CC . If V CC = 0, V2MON cannot
be monitored.
Figure 1. Two Uses of Multiple Voltage Monitoring
operate with insufficient voltage.
– It prevents the processor from operating prior to stabili-
zation of the oscillator.
X40411-A
V CC V2MON
– It allows time for an FPGA to download its configura-
tion prior to initialization of the circuit.
– It prevents communication to the EEPROM, greatly
reducing the likelihood of data corruption on power-up.
6–10V
1M
1M
5V
Reg
V CC
RESET
V2MON
(2.9V)
V2FAIL
System
Reset
When V CC exceeds the device V TRIP1 threshold value for
t PURST (selectable) the circuit releases the RESET
(X40411) and RESET (X40410) pin allowing the system
to begin operation.
Resistors selected so 3V appears on V2MON when unregulated
supply reaches 6V.
Low Voltage V CC (V1 Monitoring)
During operation, the X40410/11/14/15 monitors the
V CC level and asserts RESET/RESET if supply voltage
falls below a preset minimum V TRIP1 . The
RESET/RESET signal prevents the microprocessor
from operating in a power fail or brownout condition.
Unreg.
Supply
3.3V
Reg
1.2V
Reg
X40414-C
V CC
RESET
V2MON
V CC
System
Reset
The V1FAIL signal remains active until the voltage
drops below 1V. It also remains active until V CC returns
and exceeds V TRIP1 for t PURST .
Low Voltage V2 Monitoring
The X40410/11/14/15 also monitors a second voltage
level and asserts V2FAIL if the voltage falls below a
preset minimum 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
interrupt the microprocessor with notification of an
impending power failure. For the X40410/11 the V2FAIL
signal remains active until the V CC drops below 1V (V CC
falling). It also remains active until V2MON returns and
exceeds V TRIP2 by 0.2V. This voltage sense circuitry
monitors the power supply connected to the V2MON pin.
If V CC = 0, V2MON can still be monitored.
3
V2FAIL
Notice: No external components required to monitor two voltages.
FN8116.0
March 28, 2005
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