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Maxim > Solutions > Transport Nodes, Access Nodes, Add/Drop Multiplexers, and Digital Cross-Connects

Nonvolatile Memory

DATA SHEETS
Display Title/Parts Key Advantages
QV  PDF Watchdog Clocks with NV RAM Control
DS1558, DS1558W, DS1558Y

Discrete Component Option to DS155X Watchdog Clock Modules
QV  PDF Y2K-Compliant, Nonvolatile Timekeeping RAMs
DS1747, DS1747P

QV  PDF Y2K-Compliant, Nonvolatile Timekeeping RAMs
DS1746, DS1746P

QV  PDF Y2K-Compliant, Nonvolatile Timekeeping RAMs
DS1744, DS1744P

QV  PDF Y2K-Compliant, Nonvolatile Timekeeping RAMs
DS1743, DS1743P

QV  PDF 4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM
DS1557

QV  PDF 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
DS1556, DS1556P

QV  PDF 256k Nonvolatile, Y2K-Compliant Timekeeping RAM
DS1554

QV  PDF 4096k Nonvolatile SRAM with Battery Monitor
DS1350AB, DS1350Y

QV  PDF 1024k Nonvolatile SRAM with Battery Monitor
DS1345AB, DS1345Y

QV  PDF 256k Nonvolatile SRAM with Battery Monitor
DS1330AB, DS1330Y

QV  PDF 16M Nonvolatile SRAM
DS1270AB, DS1270Y

QV  PDF 8M Nonvolatile SRAM
DS1265AB, DS1265Y

QV  PDF 128k x 16 Nonvolatile SRAM
DS1258AB, DS1258Y

QV  PDF 4096k Nonvolatile SRAM
DS1250AB, DS1250Y

QV  PDF 2048k Nonvolatile SRAM
DS1249AB, DS1249Y

QV  PDF 1024k Nonvolatile SRAM
DS1245AB, DS1245Y

QV  PDF 256k Nonvolatile SRAM
DS1230AB, DS1230Y

QV  PDF 64k Nonvolatile SRAM
DS1225AB, DS1225AD

QV  PDF 16k Nonvolatile SRAM
DS1220AB, DS1220AD




Key Specifications:  Memory (EPROM, EEPROM, ROM, NV SRAM)
Part Number Memory Type Memory Size Bus Type Real Time Clock DIP w/Int. Batt. Pwr. Cap Pckg. Battery Monitor With GPIO VSUPPLY
(V)
VSUPPLY
(V)
min max
DS1220AB  NV SRAM 2K x 8 Parallel No Yes No No No 4.75 5.25
DS1220AD  2K x 8 Yes No No 4.5 5.5
DS1225AB  8K x 8 Yes No No 4.75 5.25
DS1225AD  8K x 8 Yes No No 4.5 5.5
DS1230AB  32K x 8 Yes Yes No 4.75 5.25
DS1230Y  32K x 8 Yes Yes No 4.5 5.5
DS1245AB  128K x 8 Yes Yes No 4.75 5.25
DS1245Y  128K x 8 Yes Yes No 4.5 5.5
DS1249AB  256K x 8 Yes No No 4.75 5.25
DS1249Y  256K x 8 Yes No No 4.5 5.5
DS1250AB  512K x 8 Yes Yes No 4.75 5.25
DS1250Y  512K x 8 Yes Yes No 4.5 5.5
DS1265AB  1M x 8 Yes No No 4.75 5.25
DS1265Y  1M x 8 Yes No No 4.5 5.5
DS1270AB  2M x 8 Yes No No 4.75 5.25
DS1270Y  2M x 8 Yes No No 4.5 5.5
DS1330AB  32K x 8 No Yes Yes 4.75 5.25
DS1330Y  32K x 8 No Yes Yes 4.5 5.5
DS1345AB  128K x 8 No Yes Yes 4.75 5.25
DS1345Y  128K x 8 No Yes Yes 4.5 5.5
DS1350AB  512K x 8 No Yes Yes 4.75 5.25
DS1350Y  512K x 8 No Yes Yes 4.5 5.5
See All Memory (EPROM, EEPROM, ROM, NV SRAM) (52)

Key Specifications:  Timekeeping & Real-Time Clocks
Part Number Functions Date/ Time Format Interface VSUPPLY
(V)
Time Keeping Current
(nA)
CL
(pF)
Memory Type Memory Size
(Bytes)
Time of Day Alarms
hh = sec/100 typ
DS1558 
NV SRAM Control
Watchdog Timekeeper
YYYY-MM-DD/ HH:MM:SS Bytewide
3.3
5
300 6 None - 1
DS1554  Watchdog Timekeeper - - NV SRAM 32K 1
DS1556  Watchdog Timekeeper - - NV SRAM 128K 1
DS1557  Watchdog Timekeeper - - NV SRAM 512K 1
DS1743  - - - NV SRAM 8K 0
DS1744  - - - NV SRAM 32K 0
DS1746  - - - NV SRAM 128K 0
DS1747  - - - NV SRAM 512K 0
See All Timekeeping & Real-Time Clocks (80)



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