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LTC1235CS 数据表(PDF) 3 Page - Linear Technology

部件名 LTC1235CS
功能描述  Microprocessor Supervisory Circuit
PDF  16 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC1235CS 数据表(HTML) 3 Page - Linear Technology

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LTC1235
PARAMETER
CONDITONS
MIN
TYP
MAX
UNITS
Battery Backup Switching
Operating Voltage Range
VCC
4.75
5.50
V
VBATT
2.00
4.25
VOUT Output Voltage
IOUT = 1mA
VCC – 0.05
VCC – 0.005
V
q
VCC – 0.1
VCC – 0.005
IOUT = 50mA
VCC – 0.5
VCC – 0.25
BACKUP Input Threshold
VCC > Reset Voltage Threshold
Logic Low
0.8
V
Logic High
2.0
BACKUP Pullup Current (Note 4)
3
µA
VOUT in Battery Backup Mode (Note 5)
IOUT = 250µA, VCC < VBATT
VBATT – 0.1
VBATT – 0.02
V
VOUT in Battery Saving Mode (Note 5)
VCC < VBATT
0V
1M
Ω Pulldown on VOUT
VCC Supply Current (excluding IOUT)IOUT ≤ 50mA
0.6
1.5
mA
q
0.6
2.5
Battery Supply Current in Battery Backup Mode and
VCC = 0V, VBATT = 2.8V
0.04
1
µA
Battery Saving Mode (Note 5)
q
0.04
5
Battery Standby Current
5.5 > VCC > VBATT + 0.2V
–0.1
+0.02
µA
(+ = Discharge, – = Charge)
q
–1.0
+0.10
Battery Switchover Threshold
Power Up
70
mV
VCC – VBATT
Power Down
50
Battery Switchover Hysteresis
20
mV
BATT ON Output Voltage (Note 6)
ISINK = 3.2mA
0.4
V
BATT ON Output Short Circuit Current (Note 6)
BATT ON = VOUT Sink Current
35
mA
BATT ON = 0V Source Current
0.5
1
25
µA
Push-Button Reset
PB RST Input Threshold
Logic Low
0.8
V
Logic High
2.0
PB RST Input Low Time (Notes 4, 7)
q
40
ms
Reset and Watchdog Timer
Reset Voltage Threshold
q
4.5
4.65
4.75
V
Reset Threshold Hysteresis
40
mV
Reset Active Time
VCC = 5V
160
200
240
ms
q
140
200
280
Watchdog Time-out Period
VCC = 5V
1.2
1.6
2.00
sec
q
1.0
1.6
2.25
Reset Active Time PSRR
1
ms/V
Watchdog Time-out Period PSRR
8
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
ISINK = 1.6mA, VCC = 4.25V
0.4
V
(Note 6)
ISOURCE = 1µA, VCC = 5V
3.5
ELECTRICAL C
C
HARA TERISTICS
VCC = Full Operating Range, VBATT = 2.8V, Backup = No Connection, TA = 25°C, unless otherwise noted.



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