Single/Dual, +3V/+5V Dual-Speed

Comparators with Auto-Standby

10

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_____________________________________________________________Pin Descriptions

Set Timeout Input. Connect a capacitor from STO to GND to program the time the comparator may

remain idle before entering standby mode. Connect STO to GND to disable the auto-standby fea-

ture. Calculate timeout with the following relationship: tASB = 10 x C

µs, where C is in pF.

STO

5

Ground

GND

6

Comparator Output

OUT

7

LP

8

Mode Status Pin. Indicates the operating mode. STAT is high for auto-standby mode or low-power

mode, and during the transition to high-speed mode. STAT = low indicates that the comparator is in

high-speed mode. STAT can source 3mA to power additional circuitry.

STAT

4

Inverting Comparator Input

IN-

3

PIN

Noninverting Comparator Input

IN+

2

Positive Supply Voltage, +2.7V to +5.25V

1

FUNCTION

NAME

Low Power Mode Input. Drive LP high for low-power mode. Drive LP low for high-speed mode

(STO = GND) or for high-speed mode with auto-standby. Connect to GND if low-power mode will

FUNCTION

QSOP

1, 9

2, 10

3, 11

4, 5

8, 16

7, 15

6, 14

13

12

NAME

1, 8

STOA,

STOB

Set Idle Timeout Input A/B. Connect a capacitor from STOA/STOB to GND to program

the time in which comparator A/B may remain idle before entering standby mode.

Connect STOA/STOB to GND to disable the auto-standby feature for comparator A/B.

µs, where C is in pF.

2, 9

GNDA, GNDB

Ground for Comparator A/B

3, 10

OUTA, OUTB

Output for Comparator A/B

4

Positive Supply Voltage, +2.7V to +5.25V. For QSOP, connect pin 4 to pin 5.

7, 14

STATB,

STATA

Mode Status Pin B/A. Indicates the operating mode of comparator B/A.

STATB/STATA is high for auto-standby mode or for low-power mode, and during

the transition to high-speed mode. STATB/STATA = low indicates that comparator

B/A is in high-speed mode. STATB/STATA can source 3mA to power additional

circuitry.

6, 13

INB-, INA-

Inverting Input for Comparator B/A

5, 12

INB+, INA+

Noninverting Input for Comparator B/A

11

LP

Low Power Mode Input for both comparators. Drive LP high for low-power mode.

Drive LP low for high-speed mode (STO_ = GND) or for high-speed mode with auto-

high-speed mode will not be used.

—

N.C.

No Connection. Not internally connected.

SO

MAX975

MAX977