参数资料
型号: MAX706SESA+T
厂商: Maxim Integrated Products
文件页数: 8/12页
文件大小: 0K
描述: IC SUPERVISOR MPU 8-SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
类型: 简单复位/加电复位
监视电压数目: 1
输出: 推挽式,图腾柱
复位: 低有效
复位超时: 最小为 140 ms
电压 - 阀值: 2.93V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
MAX705–MAX708/MAX813L
Low-Cost, μP Supervisory Circuits
+12V
+5V
1M ?
V CC
RESET
TO μ P
MAX70_
RESET
R1
1%
130k ?
1%
PFI
MAX70_
GND
MR
PFO
PARAMETER
+12V Reset
Threshold at +25 ° C
MIN
10.67
TYP
10.87
MAX
11.50
UNIT
V
Figure 5. RESET Valid to Ground Circuit
+5V
V CC
100k ?
Figure 6. Monitoring Both +5V and +12V
BUFFERED RESET TO OTHER SYSTEM COMPONENTS
R1
MR
PFI
MAX70_
PFO
100k ?
2N3904
V CC
V CC
R2
GND
RESET
TO μ P
MAX70_
RESET
4.7k ?
RESET
μ P
V-
MR
+5V
0V
GND
GND
+5V
PFO
0V
Figure 8. Interfacing to μPs with Bidirectional Reset I/O
V-
V TRIP
0V
5 ? 1.25
R1
=
1.25 ? VTRIP
R2
, VTRIP < 0
Interfacing to μPs with
Bidirectional Reset Pins
μPs with bidirectional reset pins, such as the Motorola
68HC11 series, can contend with the MAX705-MAX708
Figure 7. Monitoring a Negative Voltage
8
RESET output. If, for example, the RESET output is driven
high and the μP wants to pull it low, indeterminate logic
levels may result. To correct this, connect a 4.7k ?
resistor between the RESET output and the μP reset I/O,
as in Figure 8. Buffer the RESET output to other system
components.
Maxim Integrated
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