AEEM View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
AEEM Datasheet PDF : 14 Pages
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Low-Power, Single-/Dual-Level Battery Monitors
with Hysteresis and Integrated µP Reset
Table 1. Factory-Trimmed Lower and Upper Threshold Combinations for Single-Cell Li+
or Three-Cell Alkaline/NiCd/NiMH Applications
LOWER
THRESHOLD
(LTH)
VOLTAGES
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.3V
AG
BG
CG
DG
EG
FG
UPPER THRESHOLD (HTH)
3.4V
3.5V
AH
AI
BH
BI
CH
CI
DH
DI
EH
EI
FH
FI
3.6V
AJ
BJ
CJ
DJ
EJ
FJ
Table 2. Factory-Trimmed Lower and Upper Threshold Combinations for Two-Cell
Alkaline/NiCd/NiMH Applications
LOWER
THRESHOLD
(LTH)
VOLTAGES
1.6V
1.7V
1.8V
1.9V
2.0V
2.1V
2.3V
KQ
LQ
MQ
NQ
OQ
PQ
UPPER THRESHOLD (HTH)
2.4V
2.5V
KR
KS
LR
LS
MR
MS
NR
NS
OR
OS
PR
PS
2.6V
KT
LT
MT
NT
OT
PT
Table 3. Factory-Trimmed VCC Reset
Threshold Levels
PART NO.
SUFFIX
(_)
VCC NOMINAL
RESET
THRESHOLD (V)
T
3.075
S
2.925
R
2.625
Z
2.313
Y
2.188
W
1.665
V
1.575
DC-to-DC Converter Application
The MAX6441/MAX6442 triple-output battery monitors
can be used in conjunction with a DC-to-DC converter
to power microprocessor systems using a single Li+
cell or two to three alkaline/NiCd/NiMH cells. The LBOH
output indicates that the battery voltage is weak, and is
used to warn the microprocessor of potential problems.
Armed with this information, the microprocessor can
Table 4. VCC Reset Timeout Period Suffix
Guide
TIMEOUT
PERIOD SUFFIX
D3
D7
ACTIVE TIMEOUT PERIOD (ms)
MIN
MAX
150
300
1200
2400
reduce system power consumption. The LBOL output
indicates the battery is empty, and system power
should be disabled. By connecting LBOL to the SHDN
pin of the DC-to-DC converter, power to the microproces-
sor is removed. Microprocessor power does not return
until the battery has recharged to a voltage greater than
VLTH+ (see Figure 7).
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