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LTC694CS8 数据表(PDF) 3 Page - Linear Technology

部件名 LTC694CS8
功能描述  Microprocessor Supervisory Circuits
PDF  16 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC694CS8 数据表(HTML) 3 Page - Linear Technology

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LTC690/LTC691
LTC694/LTC695
ELECTRICAL C
C
HARA TERISTICS The q denotes specifications which apply over the operating temperature
range, otherwise specifications are at TA = 25°C. VCC = full operating range, VBATT = 2.8V, unless otherwise noted.
PARAMETER
CONDITONS
MIN
TYP
MAX
UNITS
Battery Back-Up Switching
Operating Voltage Range
VCC
4.75
5.50
V
VBATT
2.00
4.25
V
VOUT Output Voltage
IOUT = 1mA
VCC – 0.05
VCC – 0.005
V
q
VCC – 0.10
VCC – 0.005
V
IOUT = 50mA
VCC – 0.50
VCC – 0.250
V
VOUT in Battery Back-Up Mode
IOUT = 250µA, VCC < VBATT
VBATT – 0.1
VBATT – 0.02
V
Supply Current (Exclude IOUT)IOUT ≤ 50mA
0.6
1.5
mA
q
0.6
2.5
mA
Supply Current in Battery Back-Up Mode
VCC = 0V, VBATT = 2.8V
0.04
1
µA
q
0.04
5
µA
Battery Standby Current (+ = Discharge, – = Charge)
5.5 > VCC > VBATT + 0.2V
– 0.1
+ 0.02
µA
q
–1.0
+ 0.10
µA
Battery Switchover Threshold, VCC – VBATT
Power Up
70
mV
Power Down
50
mV
Battery Switchover Hysteresis
20
mV
BATT ON Output Voltage (Note 4)
ISINK = 3.2mA
0.4
V
BATT ON Output Short-Circuit Current (Note 4)
BATT ON = VOUT Sink Current
35
m
BATT ON = 0V Source Current
0.5
1
25
µA
Reset and Watchdog Timer
Reset Voltage Threshold
q
4.5
4.65
4.75
V
LTC690M
q
4.4
4.65
4.75
V
Reset Threshold Hysteresis
40
mV
Reset Active Time (LTC690/91) (Note 5)
OSC SEL HIGH, VCC = 5V
40
50
60
ms
q
35
50
70
ms
Reset Active Time (LTC694/95) (Note 5)
OSC SEL HIGH, VCC = 5V
160
200
240
ms
q
140
200
280
ms
Watchdog Time-Out Period, Internal Oscillator
Long Period, VCC = 5V
1.2
1.6
2.00
sec
q
1.0
1.6
2.25
sec
Short Period, VCC = 5V
80
100
120
ms
q
70
100
140
ms
Watchdog Time-Out Period, External Clock (Note 6)
Long Period
4032
4097
Clock
Short Period
960
1025
Cycles
Reset Active Time PSRR
1
ms/V
Watchdog Time-Out Period PSRR, Internal OSC
1
ms/V
Minimum WDI Input Pulse Width
VIL = 0.4V, VIH = 3.5V
q
200
ns
RESET Output Voltage at VCC = 1V
ISINK = 10µA, VCC = 1V
4
200
mV
RESET and LOW LINE Output Voltage (Note 4)
ISINK = 1.6mA, VCC = 4.25V
0.4
V
ISOURCE = 1µA, VCC = 5V
3.5
V
RESET and WDO Output Voltage (Note 4)
ISINK = 1.6mA, VCC = 5V
0.4
V
ISOURCE = 1µA, VCC = 4.25V
3.5
V



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