MAX802TMJA datasheet(4/12 Pages) MAXIM

Part #	MAX802TMJA

Description	3.0V/3.3V Microprocessor Supervisory Circuits

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Manufacturer	MAXIM [Maxim Integrated Products]

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3.0V/3.3V Microprocessor Supervisory Circuits

4

_______________________________________________________________________________________

nA

-500

2

500

PFI Input Current

-25

2

25

MIN

TYP

MAX

ns

100

20

tMR

–

M

—

R

–

Pulse Width

V

0.3 x VCC

VIH

–

M

—

R

–

Input Threshold

0.7 x VCC

ns

60

500

tMD

–

M

—

R

–

to Reset Delay

µA

20

60

350

–

M

—

R

–

Pull-Up Current

V

0.7 x VCC

VIH

0.3 x VCC

VIL

WDI Input Threshold

1.12

1.60

2.24

ns

100

20

WDI Pulse Width

VIL

MAX690_M, MAX802_M,

MAX804_M, MAX805_M

-1

0.01

1

-10

0.01

10

µA

WDI Input Current

MAX690/MAX802/MAX804/

MAX805 only

sec

tWD

Watchdog Timeout Period

Note 1: VCC supply current, logic input leakage, watchdog functionality (MAX690_/802_/805_/804_),

–

M

—

R

–

functionality

(MAX704_/806_), PFI functionality, state of

–

R

—

E

—

S

—

E

—

T

–

(MAX690_/704_/802_/806_), and RESET (MAX804_/805_) tested at

VBATT = 3.6V, and VCC = 5.5V. The state of

–

R

—

E

—

S

—

E

—

T

–

or RESET and

–

P

—

F

—

O

–

is tested at VCC = VCC min.

Note 2: Tested at VBATT = 3.6V, VCC = 3.5V and 0V. The battery current will rise to 10µA over a narrow transition window around

VCC = 1.9V.

Note 3: Leakage current into the battery is tested under the worst-case conditions at VCC = 5.5V, VBATT = 1.8V and at VCC = 1.5V,

VBATT= 1.0V.

Note 4: Guaranteed by design.

Note 5: When VSW > VCC > VBATT, VOUT remains connected to VCC until VCC drops below VBATT. The VCC-to-VBATT comparator

has a small 25mV typical hysteresis to prevent oscillation. For VCC < 1.75V (typ), VOUT switches to VBATT regardless of the

voltage on VBATT.

Note 6: When VBATT > VCC > VSW, VOUT remains connected to VCC until VCC drops below the battery switch threshold (VSW).

Note 7: VOUT switches from VBATT to VCC when VCC rises above the reset threshold, independent of VBATT. Switchover back to

VCC occurs at the exact voltage that causes

–

R

—

E

—

S

—

E

—

T

–

to go high (on the MAX804_/805_, RESET goes low); however

switchover occurs 200ms prior to reset.

Note 8: The reset threshold tolerance is wider for VCC rising than for VCC falling to accommodate the 10mV typical hysteresis, which

prevents internal oscillation.

Note 9: The leakage current into or out of the RESET pin is tested with RESET asserted (RESET output high impedance).

MAX690_/MAX704_/MAX805_

V

1.187

1.237

1.287

VPFT

PFI Input Threshold

1.212

1.237

1.262

SYMBOL

PARAMETER

UNITS

MAX704_/MAX806_ only

MAX704_/MAX806_ only,

–

M

—

R

–

= 0V, VCC = 3V

0V< VCC < 5.5V

MAX704_/MAX806_ only

MAX690_M, MAX704_M, MAX80_ _M

VCC < 3.6V

VPFI falling

CONDITIONS

MAX690_/MAX802_/MAX804_/MAX805_ only

VCC < 3.6V

MAX690_C/E, MAX704_C/E, MAX80_ _C/E

MAX802_C/E, MAX804_C/E,

MAX806_C/E

MAX690_C/E, MAX802_C/E,

MAX804_C/E, MAX805_C/E

MAX690_/MAX802_/MAX804_/MAX805_ only

MAX690_M, MAX704_M, MAX80_ _M

mV

10

25

nA

-500

2

500

PFI Input Current

-25

2

25

VPFH

PFI Hysteresis, PFI Rising

10

20

MAX690_M, MAX704_M, MAX80_ _M

VCC < 3.6V

MAX690_C/E, MAX704_C/E, MAX80_ _C/E

MAX690_C/E, MAX704_C/E,

MAX80_ _C/E

ELECTRICAL CHARACTERISTICS (continued)

(VCC = 3.17V to 5.5V for the MAX690T/MAX704T/MAX80_T, VCC = 3.02V to 5.5V for the MAX690S/MAX704S/MAX80_S, VCC = 2.72V to

5.5V for the MAX690R/MAX704R/MAX80_R; VBATT = 3.6V; TA = TMIN to TMAX; unless otherwise noted. Typical values are at TA = +25˚C.)

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