MAX975 Maxim, MAX975 Datasheet - Page 10

• Manufacturer Part Number: MAX975
• Description: The MAX975/MAX977 single/dual comparators feature three different operating modes, and are optimized for +3V and +5V single-supply applications
• Manufacturer: Maxim

MAX975
Single/Dual, +3V/+5V Dual-Speed
Comparators with Auto-Standby
MAX977
10
_____________________________________________________________Pin Descriptions
3, 10
5, 12
6, 13
7, 14
PIN
1, 8
2, 9
______________________________________________________________________________________
SO
11
—
1
2
3
4
5
6
7
8
4
NAME
QSOP
STAT
GND
2, 10
3, 11
6, 14
7, 15
8, 16
STO
OUT
V
IN+
1, 9
4, 5
IN-
LP
12
13
CC
GNDA, GNDB
OUTA, OUTB
INB+, INA+
Positive Supply Voltage, +2.7V to +5.25V
Noninverting Comparator Input
Inverting Comparator Input
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.
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 s, where C is in pF.
Ground
Comparator Output
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
not be used. Connect to V
INB-, INA-
STATB,
NAME
STATA
STOA,
STOB
N.C.
V
LP
CC
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.
Calculate timeout with the following relationship: t
Ground for Comparator A/B
Output for Comparator A/B
Positive Supply Voltage, +2.7V to +5.25V. For QSOP, connect pin 4 to pin 5.
Noninverting Input for Comparator B/A
Inverting Input for Comparator B/A
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.
No Connection. Not internally connected.
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-
standby. Connect to GND if low-power mode will not be used. Connect to V
high-speed mode will not be used.
CC
if high-speed mode will not be used.
FUNCTION
FUNCTION
ASB
= 10 x C s, where C is in pF.
CC
if