+3V Voltage Monitoring, Low-Cost µP

Supervisory Circuits

10

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Ordering Information (continued)

Chip Information

PROCESS: CMOS

be an order of magnitude greater than R1 and R2. The

current through R1 and R2 should be at least 1µA to

ensure that the 25nA (max) PFI input current does not

shift the trip point significantly. R3 should be larger than

10kΩ to prevent it from loading down the PFO pin.

Capacitor C1 adds noise rejection.

Monitoring a Negative Voltage

The power-fail comparator can be used to monitor a

negative supply voltage using the circuit of Figure 8.

When the negative supply is valid, PFO is low. When

the negative supply voltage drops, PFO goes high. This

circuit’s accuracy is affected by the PFI threshold toler-

to GND.

PART

†

TEMP

RANGE

PIN-

PACKAGE

PKG

CODE

MAX706PEUA

-40°C to +85°C

8 µMAX

U8-1

MAX706PMJA

-55°C to +125°C 8 CERDIP*

J8-2

MAX706RCPA

0°C to +70°C

8 Plastic Dip

P8-1

MAX706RCSA

0°C to +70°C

8 SO

S8-2

MAX706RCUA

0°C to +70°C

8 µMAX

U8-1

MAX706REPA

-40°C to +85°C

8 Plastic Dip

P8-1

MAX706RESA

-40°C to +85°C

8 SO

S8-2

MAX706REUA

-40°C to +85°C

8 µMAX

U8-1

MAX706RMJA

-55°C to +125°C 8 CERDIP*

J8-2

MAX706SCPA

0°C to +70°C

8 Plastic Dip

P8-1

MAX706SCSA

0°C to +70°C

8 SO

S8-2

MAX706SCUA

0°C to +70°C

8 µMAX

U8-1

MAX706SEPA

-40°C to +85°C

8 Plastic Dip

P8-1

MAX706SESA

-40°C to +85°C

8 SO

S8-2

MAX706SEUA

-40°C to +85°C

8 µMAX

U8-1

MAX706SMJA

-55°C to +125°C 8 CERDIP*

J8-2

MAX706TCPA

0°C to +70°C

8 Plastic Dip

P8-1

MAX706TCSA

0°C to +70°C

8 SO

S8-2

MAX706TCUA

0°C to +70°C

8 µMAX

U8-1

MAX706TEPA

-40°C to +85°C

8 Plastic Dip

P8-1

MAX706TESA

-40°C to +85°C

8 SO

S8-2

MAX706TEUA

-40°C to +85°C

8 µMAX

U8-1

MAX706TMJA

-55°C to +125°C 8 CERDIP*

J8-2

MAX706APEPA

-40°C to +85°C

8 Plastic Dip

P8-1

MAX706APESA

-40°C to +85°C

8 SO

S8-2

MAX706APEUA

-40°C to +85°C

8 µMAX

U8-1

MAX706AREPA

-40°C to +85°C

8 Plastic Dip

P8-1

MAX706ARESA

-40°C to +85°C

8 SO

S8-2

MAX706AREUA

-40°C to +85°C

8µMAX

U8-1

MAX706ASEPA

-40°C to +85°C

8 Plastic Dip

P8-1

PART

†

TEMP

RANGE

PIN-

PACKAGE

PKG

CODE

MAX706ASESA

-40°C to +85°C

8 SO

S8-2

MAX706ASEUA

-40°C to +85°C

8 µMAX

U8-1

MAX706ATEPA

-40°C to +85°C

8 Plastic Dip

P8-1

MAX706ATESA

-40°C to +85°C

8 SO

S8-2

MAX706ATEUA

-40°C to +85°C

8 µMAX

U8-1

MAX708RCPA

0°C to +70°C

8 Plastic Dip

P8-1

MAX708RCSA

0°C to +70°C

8 SO

S8-2

MAX708RCUA

0°C to +70°C

8 µMAX

U8-1

MAX708REPA

-40°C to +85°C

8 Plastic Dip

P8-1

MAX708RESA

-40°C to +85°C

8 SO

S8-2

MAX708REUA

-40°C to +85°C

8 µMAX

U8-1

MAX708RMJA

-55°C to +125°C

8 CERDIP*

J8-2

MAX708SCPA

0°C to +70°C

8 Plastic Dip

P8-1

MAX708SCSA

0°C to +70°C

8 SO

S8-2

MAX708SCUA

0°C to +70°C

8 µMAX

U8-1

MAX708SEPA

-40°C to +85°C

8 Plastic Dip

P8-1

MAX708SESA

-40°C to +85°C

8 SO

S8-2

MAX708SEUA

-40°C to +85°C

8 µMAX

U8-1

MAX708SMJA

-55°C to +125°C

8 CERDIP*

J8-2

MAX708TCPA

0°C to +70°C

8 Plastic Dip

P8-1

MAX708TCSA

0°C to +70°C

8 SO

S8-2

MAX708TCUA

0°C to +70°C

8 µMAX

U8-1

MAX708TEPA

-40°C to +85°C

8 Plastic Dip

P8-1

MAX708TESA

-40°C to +85°C

8 SO

S8-2

MAX708TEUA

-40°C to +85°C

8 µMAX

U8-1

MAX708TMJA

-55°C to +125°C

8 CERDIP*

J8-2

*Contact factory for availability and processing to MIL-STD-883.

**Future product—contact factory for availability.