Rainbow Electronics MAX16021 - Manual (Page 18)

MAX16016/MAX16020/MAX16021
Low-Power µP Supervisory Circuits with
Battery-Backup Circuit and Chip-Enable Gating
18 ______________________________________________________________________________________
Replacing the Backup Battery
When V CC is above V TH , the backup power source can
be removed without danger of triggering a reset pulse.
The device does not enter battery-backup mode when
V
CC stays above the reset threshold voltage.
Negative-Going V
CC
Transients
The MAX16016/MAX16020/MAX16021 are relatively
immune to short duration, negative going V
CC tran-
sients. Resetting the µP when V CC experiences only
small glitches is usually not desirable. A 0.1µF bypass
capacitor mounted close to V
CC provides additional
transient immunity.
MAX16020L
BATT
BATT_TEST
R LOAD
V CC
Figure 6. Adjustable BATT_TEST Load