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參數(shù)資料
| 型號： | LTC695-3.3 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 3.3V Microprocessor Supervisory Circuits |
| 中文描述： | 3.3微處理器監(jiān)控電路 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大小： | 138K |
| 代理商： | LTC695-3.3 |
4
LTC 694-3.3/LTC 695-3.3
ELECTRICAL C
range, otherwise specifications are at T
A
= 25
°
C. V
CC
= 3.3V, V
BATT
= 2V, unless otherwise noted.
HARC
The
G
denotes specifications which apply over the operating temperature
PARAMETER
WDI Input Threshold
CONDITIONS
Logic Low
Logic High
WDI = V
OUT
WDI = 0V
MIN
TYP
MAX
0.4
UNITS
G
G
V
V
2.3
WDI Input Current
G
G
4
–8
50
μ
A
μ
A
–50
Power-Fail Detector
PFI Input Threshold
PFI Input Threshold PSRR
PFI Input Current
PFO Output Voltage (Note 4)
G
1.25
1.3
0.3
±
0.01
1.35
V
mV/V
G
±
25
0.3
nA
V
V
μ
A
mA
μ
s
μ
s
μ
s
I
SINK
= 800
μ
A
I
SOURCE
= 0.1
μ
A
PFI = HIGH, PFO = 0V
PFI = LOW, PFO = V
OUT
V
IN
= –20mV, V
OD
= 15mV
V
IN
= 20mV, V
OD
= 15mV
with 10k
Pull-Up
G
G
2.3
1
PFO Short-Circuit Source Current (Note 4)
G
3
17
2
40
8
25
PFI Comparator Response Time (Falling)
PFI Comparator Response Time (Rising) (Note 4)
Chip Enable Gating
CE IN Threshold
V
IL
V
IH
0.45
V
V
1.9
CE IN Pull-Up Current (Note 6)
CE OUT Output Voltage
3
μ
A
V
V
V
ns
mA
mA
I
SINK
= 800
μ
A
I
SOURCE
= 400
μ
A
I
SOURCE
= 1
μ
A, V
CC
= 0V
C
L
= 20pF
Output Source Current
Output Sink Current
G
G
G
0.3
V
OUT
– 0.50
V
OUT
– 0.05
CE IN Propagation Delay
CE OUT Output Short-Circuit Current
G
30
15
20
50
Oscillator
OSC IN Input Current (Note 6)
OSC SEL Input Pull-Up Current (Note 6)
OSC IN Frequency Range
±
2
5
μ
A
μ
A
kHz
kHz
OSC SEL = 0V
OSC SEL = 0V, C
OSC
= 47pF
G
0
125
4
Note 5:
The external clock feeding into the circuit passes through the
oscillator before clocking the watchdog timer. Variation in the time-out
period is caused by phase errors which occur when the oscillator divides
the external clock by 64. The resulting variation in the time-out period is
64 plus one clock of jitter.
Note 6:
The input pins of CE IN, OSC IN and OSC SEL have weak internal
pull-ups which pull to the supply when the input pins are floating.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of device may be impaired.
Note 2:
All voltage values are with respect to GND.
Note 3:
For military temperature range parts, consult the factory.
Note 4:
The output pins of BATT ON, LOW LINE, PFO, WDO, RESET and
RESET have weak internal pullups of typically 3
μ
A. However, external pull-
up resistors may be used when higher speed is required.
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