D
a l l a s
Semiconductor
Clocks, Counters and PowerCap
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Real-Time Clocks and Elapsed Time Counters with Serial Interfaces
Serial interface clocks provide 4-, 3-, or 2-wire solutions for systems requiring small real time clocks.
Real-Time Clocks
Mfr.'s
Type
No. of
Pins
Package*
DIP
DIP
TSSOP
DIP
Description
DS1302
8
16
20
8
7
20
RTC, 3-wire Interface, 31 Bytes RAM, Trickle Charger
DS1305
DS1305E
DS1307
DS1603
DS1670E
RTC, 3-, 4-wire Interface, 96 Bytes RAM, Trickle Charger, 2 Time-of-Day Alarms
RTC, 3-, 4-wire Interface, 96 Bytes RAM, Trickle Charger, 2 Time-of-Day Alarms
RTC, 2-wire Interface, 56 Bytes RAM
SIP Mod.
TSSOP
2 Counters, 3-wire Interface
RTC, 3-wire Interface, CPU Reset, Watchdog, NV RAM Control, Time-of-Day Alarm, 8-Bit A/D, 3 V
Real-Time Clocks with Bytewide Interface
Bytewide interface clocks provide additional general-purpose RAM. Accept SRAMs or ROMs or densities indicated.
Phantom interface clocks are transparent to the system until a particular 64-bit data sequence has been recognized.
Available in PowerCap except DS1742.
8 KB RAM, Phantom Interface for RTC
DS1243Y
DS1243Y-12028
DS1244Y
28
Module
Module
Module
8
KB
RAM,
Phantom
Interface
for
RTC
28
32 KB RAM, Phantom Interface for RTC
DS1244Y-12028
DS1244Y-15028
DS1248Y-100
DS1251Y-100
DS1642-100
Module
Module
32
32
24
32
32
KB
KB
RAM,
RAM,
Phantom
Phantom
Interface
Interface
for
for
RTC
RTC
Module
Module
Module
Module
128 KB RAM, Phantom Interface for RTC
512 KB RAM, Phantom Interface for RTC
2 KB RAM
DS1643-100
28
8 KB RAM
DS1646L-12034
DS1742-100
DS1744-100
DS1744W-12028
DS1746-100
LPM
28
28
Module
32
128
32
KB
2 KB RAM
32 KB RAM
KB
RAM
Module
Module
RAM
Module
128 KB RAM
DS1746W-12032
DS1747W-12032
Module
Module
128
128
KB
KB
RAM
RAM
Watchdog Timekeepers with Bytewide Interface
Watchdog Timekeepers provide, time-of-day alarm and microprocessor reset. Available in PowerCap except DS1501 and DS1511.
DS1286
DS1386-32-12032
28
Module
Module
50 Bytes RAM, Time of Day Alarm
KB
32
RAM,
Time
of
Day
Alarm
DS1501W
DS1501Y
DS1511W
DS1511Y
28
28
28
28
28
Module
28
Module
32
Module
32
Module
34
Power
DIP/TSOP/SOIC
DIP/TSOP/SOIC
Module
Module
Module
8
Module
8
Module
32
256 Bytes RAM, KS, WU, 3.3 V, Y2K
256 Bytes RAM, KS, WU, 5 V, Y2K
256 Bytes RAM, KS, WU, 3.3 V, Y2K
256 Bytes RAM, KS, WU, 5 V, Y2K
8 KB RAM
DS1543-100
DS1543W-12028
DS1553-100
DS1553W-12028
DS1554-100
DS1554W-12032
DS1556-100
DS1556W-12032
DS1557P-100
DS1557WP-12034
KB
8 KB RAM
KB
32 KB RAM
KB
128 KB RAM
KB
RAM
RAM
RAM
RAM
Module
128
Power Cap
Cap
512 KB RAM
512
KB
RAM
Real-Time Clocks with Multiplexed Address/Data Bus
Multiplexed address/data bus clocks provide time-of-day alarm, programmable square wave output and a programmable interrupt output in addition to clock and calendar.
13
DS12887
DS14287
DS1693
24
24
28
24
24
24
Module
Module
Module
Module
Module
Module
114 Bytes RAM
114 Bytes RAM, NV RAM Control
114 Bytes RAM, NV RAM Cont., KS, S/N, WU, VBAUX
114+ 2 KB RAM, KS, S/N, WU, VBAUX, 5 V
114+ 4 KB RAM, KS, S/N, WU, VBAUX, 3 V
114+ 4 KB RAM, KS, S/N, WU, VBAUX, 5 V
DS17287-5
DS17487-3
DS17887-5
Sockets with Real Time Clocks
DS1216C
DS1216D
DS1216E
DS1216E-3
DS1216F
DS1216F-3
DS1216H
28
32
28
28
32
32
32
Socket
Socket
Socket
Socket
Socket
Socket
Socket
RAM: 8 KB, 32 KB
RAM: 8 KB, 32 KB, 128 KB
ROM: 8 KB, 32 KB
ROM: 8 KB, 32 KB, 3 V
ROM: 8 KB, 32 KB, 128 KB
ROM: 8 KB, 32 KB, 128 KB, 3 V
RAM: 512 KB
*All modules contain 32.768 KHz crystal and embedded lithium energy source.
DS9034PC PowerCap
The DS9034PC PowerCap is a snap-on lithium power source which provides 10 years of battery backup power for
Nonvolatile SRAMs in Dallas SemiconductorÕs surface-mountable PowerCap Module (PCM) package. After a PowerCap
Module has been soldered in place, the DS9034PC PowerCap is snapped onto the PCM to form a complete Nonvolatile
SRAM module. The PowerCap is keyed to prevent incorrect attachment and is designed to maintain mechanical and
electrical contact with its host PowerCap Module even during severe mechanical shock and vibration. Periodic
replacement allows Nonvolatile SRAM module life to be extended indefinitely. The DS9034PC is easily removed by
inserting a regular screwdriver into the detachment feature and prying gently outward and upward to release the
PowerCap from the PCM board.
To be used with Mfr.Õs Type Ñ DS1230YP-70, DS1245YP-70, DS1250YP-70, DS1230WP-150, DS1245WP-150,
DS1250WP-150, DS1330WP-150, DS1345-150, DS1350WP-150. See next page for information on these devices.
Mfr.Õs
Type
Nominal
Voltage
Nominal
Capacity
Data
Retention Life
DS9034PC
3 V
130 mAH
10 Years (25¡C)
806
b
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