
DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
21 of 22
TYPICAL OPERATING CIRCUITS
PACKAGE INFORMATION
For the latest package outline information and land patterns (footprints), go to
that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character,
but the drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NUMBER
LAND PATTERN NO.
28 SO
W28+3
28 TSOP
Z28+4
28 EDIP
MDP28+1
—
DS1501
CPU
VCC
IRQ
RST
GND
X2
X1
VCC
RPU
CRYSTAL
SQW
VBAT
DQ0–DQ7
RST
WE
OE
VBAUX
KS
PWR
CE
A0–A4
IRQ
GND
DS1511
CPU
VCC
IRQ
RST
GND
VCC
RPU
SQW
DQ0–DQ7
RST
WE
OE
VBAUX
KS
PWR
CE
A0–A4
IRQ
GND