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| 型号： | LTC694IS8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC MPU SUPERVISORY CIRCUIT 8SOIC |
| 标准包装： | 100 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 4.65V |
| 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： | 管件 |
LTC690/LTC691
LTC694/LTC695
ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the operating temperature
range, otherwise specifications are at T A = 25°C . V CC = full operating range, V BATT = 2.8V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Battery Back-Up Switching
Operating Voltage Range
V CC
V BATT
4.75
2.00
5.50
4.25
V
V
V OUT Output Voltage
V OUT in Battery Back-Up Mode
I OUT = 1mA
I OUT = 50mA
I OUT = 250μA, V CC < V BATT
l
V CC – 0.05 V CC – 0.005
V CC – 0.10 V CC – 0.005
V CC – 0.50 V CC – 0.250
V BATT – 0.1 V BATT – 0.2
V
V
V
V
Supply Current (Exclude I OUT )
Supply Current in Battery Back-Up Mode
Battery Standby Current (+ = Discharge, – = Charge)
Battery Switchover Threshold, V CC – V BATT
I OUT = 50mA
V CC = 0V, V BATT = 2.8V
5.5 > V CC > V BATT + 0.2V
Power Up
Power Down
l
l
l
–0.1
–0.1
0.6
0.6
0.04
0.04
70
50
1.5
2.5
1
5
+0.02
+0.10
mA
mA
μA
μA
μA
μA
mV
mV
Battery Switchover Hysteresis
20
mV
BATT ON Output Voltage (Note 4)
BATT ON Output Short-Circuit Current (Note 4)
I SINK = 3.2mA
BATT ON = V OUT Sink Current
35
0.4
V
m
BATT ON = 0V Source Current
0.5
1
25
μA
Reset and Watchdog Timer
Reset Voltage Threshold
l
4.5
4.65
4.75
V
Reset Threshold Hysteresis
40
mV
Reset Active Time (LTC690/91) (Note 5)
Reset Active Time (LTC694/95) (Note 5)
Watchdog Timeout Period, Internal Oscillator
Watchdog Timeout Period, External Clock (Note 6)
OSC SEL HIGH, V CC = 5V
OSC SEL HIGH, V CC = 5V
Long Period, V CC = 5V
Short Period, V CC = 5V
Long Period
Short Period
l
l
l
l
40
35
160
140
1.2
1
80
70
4032
960
50
50
200
200
1.6
1.6
100
100
60
70
240
280
2.00
2.25
120
140
4097
1025
ms
ms
ms
ms
sec
sec
ms
ms
Clock
Cycles
Reset Active Time PSRR
Watchdog Timeout Period PSRR, Internal OSC
1
1
ms/V
ms/V
Minimum WDI Input Pulse Width
V IL = 0.4V, V IH = 3.5V
l
200
ns
RESET Output Voltage at V CC = 1V
RESET and LOW?LINE Output Voltage (Note 4)
RESET and WDO Output Voltage (Note 4)
I SINK = 10μA, V CC = 1V
I SINK = 1.6mA, V CC = 4.25V
I SOURCE = 1μA, V CC = 5V
I SINK = 1.6mA, V CC = 5V
I SOURCE = 1μA, V CC = 4.25V
3.5
3.5
4
200
0.4
0.4
mV
V
V
V
V
690ff
4
For more information www.linear.com/690
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