Rainbow-electronics MAX6869 Manual de usuario descargar pdf (Pagina 3)

MAX6854–MAX6869

Nanopower µP Supervisory Circuits with

Optional Manual Reset, Watchdog Timer

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= 1.2V to 5.5V, T

= -40°C to +85°C, unless otherwise specified. Typical values are at V

= 2.5V, T

= +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS MIN

TYP MAX

UNITS

≥ 1.1V, I

SOURCE

= 10µA,

RESET asserted, T

≥ 0°C

0.8 x V

≥ 1.2V, I

SOURCE

= 10µA,

RESET asserted

0.8 x V

≥ 1.53V, I

SOURCE

= 200µA,

RESET asserted

0.8 x V

≥ 2.12V, I

SOURCE

= 500µA,

RESET asserted

0.8 x V

≥ 1.71V, I

SINK

= 500µA,

RESET deasserted

0.3

RESET Output Voltage

≥ 2.38V, I

SINK

= 1.2mA,

RESET deasserted

0.3

CT Input Current CT = GND or V

20 nA

0.8 x V

CT Input Voltage

0.2 x V

MANUAL RESET INPUT

0.7 x V

MR Input Voltage

0.3 x V

MR Minimum Pulse Width t

MPW

1µs

MR Glitch Rejection 200 ns

MR to Reset Delay t

MRD

250 ns

MR Pullup Resistance 51020kΩ

WATCHDOG TIMER (MAX6864–MAX6869)

0.7 x V

WDI Input Voltage

0.3 x V

WDI Input Current WDI = GND or V

20 nA

WDI Pulse Width t

WDI

(Note 3) 150 ns

S 1.5 3.3

7.75

Watchdog Timeout Period t

L95209 487

Note 1: Devices are tested at T

= +25°C. Specifications for T

= -40°C to +85°C are guaranteed by design.

Note 2: For the MAX6864–MAX6869, the watchdog period is 1s with t

RISE

and t

FALL

< 50ns.

Note 3: Guaranteed by design.

1 2 3 4 5 6 7 8 ... 16 17

MAX6854–MAX6869 1

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