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MAX697

Microprocessor Supervisory Circuits

Maxim Integrated 

MAX696/MAX697

Microprocessor Supervisory Circuits

Absolute Maximum Ratings

Terminal Voltage (with respect to GND)

VCC.......................................................................-0.3V to +6V

VBATT...................................................................-0.3V to +6V

All Other Inputs (Note 1).....................-0.3V to (VOUT + 0.5V)

Input Current

VCC................................................................................200mA

VBATT..............................................................................50mA

GND.................................................................................20mA

Output Current

VOUT....................................................Short-Circuit Protected

All Other Outputs.............................................................20mA

Rate-of-Rise, VBATT, VCC...............................................100V/μs

Operating Temperature Range

C Suffix................................................................0°C to +70°C

E Suffix.............................................................-40°C to +85°C

M Suffix..........................................................-55°C to +125°C

Power Dissipation (TA = +70°C)

16-Pin PDIP (derated 7mW/°C above +70°C)..............600mW

16-Pin SO (derated 7mW/°C above +70°C).................600mW

16-Pin CERDIP (derated 10mW/°C above +85°C)......600mW

Storage Temperature Range..............................-65°C to +160°C

Lead Temperature (soldering, 10s)..................................+300°C

Note 1: The input voltage limits on PFI and WDI may be exceeded providing the input current is limited to less than 10mA.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these

or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect

device reliability.

Electrical Characteristics

(VCC = full operating range, VBATT = 2.8V, TA = +25°C, unless otherwise noted.)

PARAMETER

Operating Voltage Range

TA = full

Supply Current (MAX697)

TA = full

BATTERY-BACKUP SWITCHING (MAX696)

CONDITIONS

MAX696 VCC

MAX696 VBATT

MAX697 VCC

VOUT Output Voltage

IOUT = 1mA, TA = full

IOUT = 50mA, TA = full

VOUT in Battery-Backup Mode

IOUT = 250µA, VCC < (VBATT - 0.2V), TA = full

Supply Current (Excludes IOUT)

IOUT = 1mA

IOUT = 50mA

Supply Current in Battery-Backup VCC = 0V, VBATT = 2.8V, TA = +25°C

Mode

VCC = 0V, VBATT = 2.8V, TA = full

Battery Standby Leakage Current

5.5V > VCC > (VBATT +

0.3V)

TA = +25°C

TA = full

Battery Switchover Threshold VCC Power-up

- VBATT

Power-down

Battery Switchover Hysteresis

BATT ON Output Voltage

ISINK - 1.6mA

BATT ON Output Short-Circuit

Current

BATT ON = VOUT = 2.4V sink current

BATT ON = VOUT, VCC = 0V

RESET AND WATCHDOG TIMER

Low-Line Voltage Threshold (LLIN) VCC = +5V, +3V; TA = full

Reset Timeout Delay

Figure 6, OSC SEL HIGH, VCC = 5V

Watchdog Timeout Period,

Internal Oscillator

Long period, VCC = 5V

Short period, VCC = 5V

MIN TYP MAX UNITS

3.0

5.5

2.0

VCC - 0.3V V

3.0

5.5

160 300

µA

VCC - VCC -

0.3

0.1

VCC - VCC -

V

0.5

0.25

VBATT - VBATT

0.1 - 0.02

V

1.5

4

mA

2.5

7

0.6

1

µA

10

-100

+20

nA

-1.00

+0.02 µA

70

mV

50

20

mV

0.4

V

7

mA

0.5

2.5 25.0

µA

1.25 1.30 1.35

V

35

50

70

ms

1.00

1.6

2.25

s

70

100 140

ms

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