Datasheet
2
LTC699
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
Terminal Voltage
V
CC
................................................... –0.3V to 6.0V
WDI Input .............................. –0.3V to V
CC
+ 0.3V
RESET Output ...................................... –0.3V to 6V
Power Dissipation............................................. 500mW
Operating Temperature Range
LTC699C .............................................. 0°C to 70°C
LTC699I ........................................... –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................ 300°C
1
2
3
4 5
6
7
8
TOP VIEW
WDI
V
CC
V
CC
GND
GND
LTC699
NC
RESET
N8 PACKAGE
8-LEAD PLASTIC DIP
GND
1
2
3
4
5
6
7
8
TOP VIEW
GND
V
CC
V
CC
NC
GND
GND
S8 PACKAGE
8-LEAD PLASTIC SOIC
WDI
RESET
LTC699
LTC699CN8
LTC699IN8
LTC699CS8
LTC699IS8
ORDER PART
NUMBER
(Notes 1 and 2)
WU
U
PACKAGE
/
O
RDER I FOR ATIO
PARAMETER CONDITONS MIN TYP MAX UNITS
Operating Voltage Range ● 3.0 5.5 V
Supply Current 0.6 1.5 mA
● 0.6 2.5
Power Down Reset Assertion ● 4.5 4.65 4.75 V
Power Up Reset De-Assertion ● 4.75 V
Reset Threshold Hysteresis 40 mV
Reset Active Time 160 200 240 ms
● 140 200 280
Watchdog Time-out Period 1.2 1.6 2.0 sec
● 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 V
IL
= 0.4, V V
IH
= 3.5V ● 200 ns
RESET output Voltage at V
CC
= 1V (Note 3) I
SINK
= 10µA, V
CC
= 1V 4 200 mV
RESET output Voltage I
SINK
= 1.6mA, V
CC
= 4.25V 0.4 V
RESET Output Short Circuit Current Output Sink Current 25 mA
WDI Input Threshold Logic Low 0.8 V
Logic High 2.0
WDI Input Current WDI = V
OUT
● 450µA
WDI = 0V
● –50 –8
V
CC
= +5V, T
A
= 25°C, unless otherwise noted.
E
LECTR
IC
AL C CHARA TERIST
ICS
Note 2: All voltage values are with respect to GND.
Note 3: RESET is active low, open drain output.
The ● denotes specifications which apply over the operating temperature
range.
Note 1: Absolute maximum ratings are those values beyond which the life
of device may be impaired.