NV SRAMs by Microchip Technology
NV SRAMs by Microchip TechnologyDate of publication: 23-01-2023 🕒 4 min read
NV SRAMs (Non Volatile Serial Random Access Memory) are the perfect solution for applications where data is saved to memory at high frequency. NV SRAM chips are an attractive alternative to other types of non-volatile memories, especially cost-wise – thanks to the external battery, data will remain saved on the chip even when the main power supply is disconnected.
Memory access is provided via a standard SPI serial interface, which makes the chips suitable for use with a majority of microcontrollers or microprocessors that are currently available on the market. As only 3 lines are used for communication purposes (SCK clock input and single SI/SO data lines), the resources of the master circuit are spared – this also simplifies the design and construction of the target circuit, and therefore reduces production costs. Applications that will require faster data access can take advantage of the 23LCV chips' ability to communicate via SDI (Serial Dual Interface) which offers excellent data transfer capabilities.
The memory has no limit on the number of read/write cycles and boasts low current consumption (read: 3mA for reading operations and 4µA on standby). In the event of a power failure, the system automatically switches over to the power supply from the backup battery connected to the Vbat input.
The 23LCV series chips by Microchip that are currently available at TME offer the capacity of 512kbit and 1024kbit. They are available in standard THT packages (DIP8) and SMD packages (SO8, TSSOP8). This makes them perfectly suited to all devices that typically use this type of chip, e.g. meters, data loggers or flight recorders (so-called “black boxes”).
| Parameters | |
|---|---|
| Integrated circuit type: | SRAM |
| Memory type: | NV SRAM |
| Memory organisation*: | 64k x 8bit, 128k x 8bit |
| Clock frequency: | 20MHz |
| Package*: | DIP8, SO8, TSSOP8 |
| Mounting*: | THT, SMD |
| Operating temperature: | -40…85°C |
| Interface*: | SPI, SDI |
| Memory capacity*: | 512kbit, 1024kbit |
| Interface type: | serial |
| Integrated circuit properties: | battery back-up |
| Operating voltage: | 2.5…5.5V |
* depending on the model
Product overview
| Symbol | Package | Memory organisation | Capacity[kbit] |
|---|---|---|---|
| 23LCV1024-I/P | DIP8 | 128kx8bit | 1024 |
| 23LCV1024-I/SN | SO8 | 128kx8bit | 1024 |
| 23LCV1024-I/ST | TSSOP8 | 128kx8bit | 1024 |
| 23LCV512-I/P | DIP8 | 64kx8bit | 512 |
| 23LCV512-I/SN | SO8 | 64kx8bit | 512 |
| 23LCV512-I/ST | TSSOP8 | 64kx8bit | 512 |
