Product line gives a lower-cost different to parallel SRAM with as much as 4 Mb density and 143 MHz SPI/SQI communications

To deal with a typical buyer want for larger and quicker SRAM, Microchip Expertise has expanded its Serial SRAM product line to incorporate bigger densities of as much as 4 Mb and elevated Serial Peripheral Interface/Serial Quad I/O Interface (SPI/SQI) pace to 143 MHz. The two Mb and 4 Mb gadgets are designed to supply a lower-cost different to conventional parallel SRAM merchandise and embody non-compulsory battery backup switchover circuitry within the SRAM reminiscence to retain information on energy loss.

Not like parallel RAM, which requires massive packages and no less than 26–35 microcontroller (MCU) I/Os to interface, the Microchip serial SRAM gadgets are available in a lower-cost, 8-pin package deal and make the most of a high-speed SPI/SQI communication bus that solely requires 4−6 MCU I/O pins for simple integration. This reduces the necessity for a costlier, high-pin-count MCU and may help decrease the general board footprint.

Addressing the commonest downside to serial SRAM—that parallel is quicker than serial reminiscence—the two Mb and 4 Mb serial SRAM gadgets have elevated the bus pace functionality to 143 MHz with non-compulsory quad SPI (4 bits per clock cycle), which vastly minimizes the pace hole between options.

“Serial SRAM is a well-liked resolution for engineers who want extra RAM than what is accessible on board their MCU however need to scale back value and general board dimension,” stated Jeff Leasure, director of Microchip’s reminiscence merchandise enterprise unit. “Microchip’s 2 Mb and 4 Mb serial SRAM gadgets are supposed to interchange costly parallel SRAM with a simple and cost-effective different.”

The small-form-factor, low-power, high-performance serial SRAM gadgets have limitless endurance and nil write occasions, making them wonderful choices for functions involving steady information switch, buffering, information logging, metering and different math- and data-intensive features. These gadgets can be found from 64 Kbit as much as 4 Mb in density and help SPI, SDI and SQI bus modes. Go to Microchip’s Reminiscence Merchandise web page to study in regards to the firm’s full portfolio of reminiscence gadgets.