Datasheet

MAX971–MAX974/MAX981–MAX984
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
______________________________________________________________________________________ 13
MAX973
MAX983
V+
7
3.3V
LOGIC
SUPPLY
10kΩ
20kΩ
2.4MΩ
LOW BATT
OUTB
8
REF
6
HYST
5
2
V-
R2
47kΩ
R1
110kΩ
STEP-DOWN
REGULATOR
3
INA+
1
OUTA
4
INB-
1MΩ
BATTERY
(4 CELLS)
953kΩ
Q1
9V DC
WALL
ADAPTER
470kΩ
DC OK
INB+
INB-
INC+
INC-
IND+
IND-
INA+
INA-
4
5
3
7
6
11
10
13
12
OUTA 2
1
16
15
8
OUTB
OUTC
OUTD
914
10kΩ
V+
GND
MAX974
MAX984
5V 3.3V
10kΩ
10kΩ
10kΩ
REF
V-
N.C.
-5V
V
INA
V
INB
V
INC
V
IND
Figure 6. Battery Switchover Circuit
Figure 7. Level Shifter: ±5V Input to Single-Ended 3.3V Output
UCSP Applications Information
For the latest application details on UCSP contruction,
dimensions, tape carrier information, printed circuit
board techniques, bump-pad layout and
recommended reflow temperature profile as well as the
latest information on reliability testing results, go to
Maxim’s web site at www.maxim-ic.com/ucsp to find
the Application Note: UCSP–A Wafer-Level Chip-Scale
Package.