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The DS1744W-120+ from Analog Devices (Maxim Integrated) is a 4Mbit non-volatile SRAM (NV SRAM) with an integrated real-time clock in a 28-pin EDIP package. It combines 512K x 8 SRAM with an embedded lithium energy cell to provide data retention for over 10 years without external power. The W suffix indicates 3.3V operation and the -120 suffix denotes 120ns access time.
Especificaciones
| Memory Capacity | 512K x 8 (4Mbit) |
| Access Time | 120ns |
| Tensión de alimentación | 3.0V ~ 3.6V (3.3V W Version) |
| Batería de reserva | Internal lithium cell, >10 years data retention |
| Real-Time Clock | Integrated with leap year compensation |
| Write Protection | Clock register write protect |
| Paquete | EDIP-28 (28-pin embedded battery DIP) |
| Temperatura de funcionamiento | -40°C ~ +85°C |
Características
- Integrated lithium energy cell for non-volatility
- Over 10 years of data retention in the absence of external power
- Full SRAM compatibility with unlimited write endurance
- On-chip real-time clock with century calendar
- Automatic leap year adjustment including century correction
- Write protect circuitry for clock registers
- Lead-free packaging (+ suffix)
Aplicaciones
- Industrial control parameter storage
- Medical instrumentation data logging
- Telecom system configuration memory
- Embedded systems requiring non-volatile storage
- Point-of-sale terminal transaction logging
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