|
DS1249W
3.3V 2048kb Nonvolatile SRAM
|
Status
Description
The DS1249W 2048kb nonvolatile (NV) SRAMs are 2,097,152-bit, fully static, NV SRAMs organized as 262,144 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry that constantly monitors VCC for an out-of-tolerance condition. When such a condition occurs, the lithium energy source is automatically switched on and write protection is unconditionally enabled to prevent data corruption. There is no limit on the number of write cycles that can be executed, and no additional support circuitry is required for microprocessor interfacing.
|
|
Data Sheet
|
This product contains lithium-metal batteries. See applicable regulations for transport requirements for batteries in equipment.
Key Features
- 10 years minimum data retention in the absence of external power
- Data is automatically protected during power loss
- Unlimited write cycles
- Low-power CMOS operation
- Read and write access times of 100ns
- Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time
- Optional industrial (IND) temperature range of -40°C to +85°C
- JEDEC standard 32-pin DIP package
- Underwriters Laboratories (UL) Recognized
|
|
Applications/Uses
- Automated Test Equipment (ATE)
- Automatic Utility Meter Reading
- Building Energy Management (HVAC)
- Cable Modems
- Computers: Desktop, Workstation, Server
- Digital Television (Receivers, Set-Top Boxes)
- Modems (Analog, ISDN, DSL)
- Network Hubs, Switches, Routers
- Notebook Computers
- Oscilloscopes
- Printers and Faxes
- Programmable Logic Controllers
- Storage Systems
- Test and Measurement Equipment
|
|
|
|
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 |
GPIO |
VSUPPLY
(V) |
VSUPPLY
(V) |
Budgetary Price |
| min |
max |
See Notes |
| DS1249W |
NV SRAM |
256K x 8 |
Parallel |
No |
Yes |
No |
No |
No |
3 |
3.6 |
$27.64 @1k |
|
See All Memory (EPROM, EEPROM, ROM, NV SRAM) (58)
|
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
|
|
Diagram
Pin Assignment
Didn't Find What You Need?
Information Index
Document Ref.: 19-5633
Rev 3;
2010-11-23
This page last modified: 2010-11-23
|
Download
E-Mail