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Maxim > Solutions > Transport Nodes, Access Nodes, Add/Drop Multiplexers, and Digital Cross-Connects
Nonvolatile Memory
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| 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
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| 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
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| QV PDF |
1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
DS1556, DS1556P
| |
| QV PDF |
256k Nonvolatile, Y2K-Compliant Timekeeping RAM
DS1554
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| 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
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| QV PDF |
16M Nonvolatile SRAM
DS1270AB, DS1270Y
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| QV PDF |
8M Nonvolatile SRAM
DS1265AB, DS1265Y
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| QV PDF |
128k x 16 Nonvolatile SRAM
DS1258AB, DS1258Y
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| QV PDF |
4096k Nonvolatile SRAM
DS1250AB, DS1250Y
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| QV PDF |
2048k Nonvolatile SRAM
DS1249AB, DS1249Y
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| QV PDF |
1024k Nonvolatile SRAM
DS1245AB, DS1245Y
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| QV PDF |
256k Nonvolatile SRAM
DS1230AB, DS1230Y
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| QV PDF |
64k Nonvolatile SRAM
DS1225AB, DS1225AD
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| QV PDF |
16k Nonvolatile SRAM
DS1220AB, DS1220AD
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| Key Specifications:
Memory (EPROM, EEPROM, ROM, NV SRAM) |
| Part Number |
Memory Type |
Memory Size |
Bus Type |
Real-Time Clock |
DIP with Internal Battery |
PowerCap Package |
Battery Monitor |
With GPIO |
Single Piece Module |
Supply Voltage (min) (V) |
Supply Voltage (max) (V) |
|
DS1220AB
|
NV SRAM
|
2K x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.75
|
5.25
|
|
DS1220AD
|
NV SRAM
|
2K x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.5
|
5.5
|
|
DS1225AB
|
NV SRAM
|
8K x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.75
|
5.25
|
|
DS1225AD
|
NV SRAM
|
8K x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.5
|
5.5
|
|
DS1230AB
|
NV SRAM
|
32K x 8
|
Parallel
|
No
|
Yes
|
Yes
|
No
|
No
|
No
|
4.75
|
5.25
|
|
DS1230Y
|
NV SRAM
|
32K x 8
|
Parallel
|
No
|
Yes
|
Yes
|
No
|
No
|
No
|
4.5
|
5.5
|
|
DS1245AB
|
NV SRAM
|
128K x 8
|
Parallel
|
No
|
Yes
|
Yes
|
No
|
No
|
No
|
4.75
|
5.25
|
|
DS1245Y
|
NV SRAM
|
128K x 8
|
Parallel
|
No
|
Yes
|
Yes
|
No
|
No
|
No
|
4.5
|
5.5
|
|
DS1249AB
|
NV SRAM
|
256K x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.75
|
5.25
|
|
DS1249Y
|
NV SRAM
|
256K x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.5
|
5.5
|
|
DS1250AB
|
NV SRAM
|
512K x 8
|
Parallel
|
No
|
Yes
|
Yes
|
No
|
No
|
No
|
4.75
|
5.25
|
|
DS1250Y
|
NV SRAM
|
512K x 8
|
Parallel
|
No
|
Yes
|
Yes
|
No
|
No
|
No
|
4.5
|
5.5
|
|
DS1258AB
|
NV SRAM
|
128K x 16
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.75
|
5.25
|
|
DS1258Y
|
NV SRAM
|
128K x 16
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.5
|
5.5
|
|
DS1265AB
|
NV SRAM
|
1M x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.75
|
5.25
|
|
DS1265Y
|
NV SRAM
|
1M x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.5
|
5.5
|
|
DS1270AB
|
NV SRAM
|
2M x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.75
|
5.25
|
|
DS1270Y
|
NV SRAM
|
2M x 8
|
Parallel
|
No
|
Yes
|
No
|
No
|
No
|
No
|
4.5
|
5.5
|
|
DS1330AB
|
NV SRAM
|
32K x 8
|
Parallel
|
No
|
No
|
Yes
|
Yes
|
No
|
No
|
4.75
|
5.25
|
|
DS1330Y
|
NV SRAM
|
32K x 8
|
Parallel
|
No
|
No
|
Yes
|
Yes
|
No
|
No
|
4.5
|
5.5
|
|
DS1345AB
|
NV SRAM
|
128K x 8
|
Parallel
|
No
|
No
|
Yes
|
Yes
|
No
|
No
|
4.75
|
5.25
|
|
DS1345Y
|
NV SRAM
|
128K x 8
|
Parallel
|
No
|
No
|
Yes
|
Yes
|
No
|
No
|
4.5
|
5.5
|
|
DS1350AB
|
NV SRAM
|
512K x 8
|
Parallel
|
No
|
No
|
Yes
|
Yes
|
No
|
No
|
4.75
|
5.25
|
|
DS1350Y
|
NV SRAM
|
512K x 8
|
Parallel
|
No
|
No
|
Yes
|
Yes
|
No
|
No
|
4.5
|
5.5
|
| See All Memory (EPROM, EEPROM, ROM, NV SRAM) (69) |
| Key Specifications:
Timekeeping & Real-Time Clocks |
| Part Number |
Functions |
Time Format (hh = sec/100) |
Date Format |
Interface |
Supply Voltage (V) |
Time- keeping Current (typ) (nA) |
CL, Load Capacitance (pF) |
Memory Type |
Memory Size (Bytes) |
Number of Time of Day Alarms |
|
DS1558
|
|
HH:MM:SS
|
YYYY-MM-DD
|
Bytewide
|
3.3
5
|
300
|
6
|
None
|
-
|
1
|
|
DS1554
|
|
HH:MM:SS
|
YYYY-MM-DD
|
Bytewide
|
3.3
5
|
-
|
-
|
NV SRAM
|
32K
|
1
|
|
DS1556
|
|
HH:MM:SS
|
YYYY-MM-DD
|
Bytewide
|
3.3
5
|
-
|
-
|
NV SRAM
|
128K
|
1
|
|
DS1557
|
|
HH:MM:SS
|
YYYY-MM-DD
|
Bytewide
|
3.3
5
|
-
|
-
|
NV SRAM
|
512K
|
1
|
|
DS1743
|
-
|
HH:MM:SS
|
YYYY-MM-DD
|
Bytewide
|
3.3
5
|
-
|
-
|
NV SRAM
|
8K
|
0
|
|
DS1744
|
-
|
HH:MM:SS
|
YYYY-MM-DD
|
Bytewide
|
3.3
5
|
-
|
-
|
NV SRAM
|
32K
|
0
|
|
DS1746
|
-
|
HH:MM:SS
|
YYYY-MM-DD
|
Bytewide
|
3.3
5
|
-
|
-
|
NV SRAM
|
128K
|
0
|
|
DS1747
|
-
|
HH:MM:SS
|
YYYY-MM-DD
|
Bytewide
|
3.3
5
|
-
|
-
|
NV SRAM
|
512K
|
0
|
| See All Timekeeping & Real-Time Clocks (86) |
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