LTC695-3.3 LINER [Linear Technology], LTC695-3.3 Datasheet - Page 4

• Manufacturer Part Number: LTC695-3.3
• Description: 3.3V Microprocessor Supervisory Circuits
• Manufacturer: LINER [Linear Technology]

LTC694-3.3/LTC695-3.3
ELECTRICAL C
range, otherwise specifications are at T
PARAMETER
WDI Input Threshold
WDI Input Current
Power-Fail Detector
PFI Input Threshold
PFI Input Threshold PSRR
PFI Input Current
PFO Output Voltage (Note 4)
PFO Short-Circuit Source Current (Note 4)
PFI Comparator Response Time (Falling)
PFI Comparator Response Time (Rising) (Note 4)
Chip Enable Gating
CE IN Threshold
CE IN Pull-Up Current (Note 6)
CE OUT Output Voltage
CE IN Propagation Delay
CE OUT Output Short-Circuit Current
Oscillator
OSC IN Input Current (Note 6)
OSC SEL Input Pull-Up Current (Note 6)
OSC IN Frequency Range
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 A. However, external pull-
up resistors may be used when higher speed is required.
4
HARA TERISTICS
C
A
= 25 C. V
CONDITIONS
Logic Low
Logic High
WDI = V
WDI = 0V
I
I
PFI = HIGH, PFO = 0V
PFI = LOW, PFO = V
V
V
I
I
I
C
Output Source Current
Output Sink Current
OSC SEL = 0V
OSC SEL = 0V, C
SINK
SOURCE
SINK
SOURCE
SOURCE
IL
IH
L
CC
V
V
with 10k Pull-Up
IN
IN
= 20pF
= 3.3V, V
= 800 A
= – 20mV, V
= 20mV, V
= 800 A
OUT
= 0.1 A
= 400 A
= 1 A, V
The
BATT
OD
CC
OSC
OD
denotes specifications which apply over the operating temperature
= 15mV
= 0V
OUT
= 15mV
= 2V, unless otherwise noted.
= 47pF
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.
V
V
OUT
OUT
MIN
1.25
– 50
2.3
2.3
1.9
1
0
– 0.50
– 0.05
TYP
1.3
0.3
0.01
– 8
17
40
30
15
20
3
2
8
3
5
4
4
2
MAX
1.35
0.45
125
0.4
0.3
0.3
50
25
50
25
UNITS
mV/V
kHz
kHz
mA
mA
mA
nA
ns
V
V
A
A
V
V
V
A
V
V
A
V
V
V
A
A
s
s
s