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New SQI Interface SuperFlash Memory Devices

Microchip Technology recently launched the SST26VF family of 3-V Serial Quad I/O interface (SQI interface) SuperFlash memory devices. Available with 16-, 32- or 64-Mb of memory, the “26 Series” family is manufactured using Microchip’s high-performance CMOS SuperFlash technology.

The SST26VF memory family provides fast erase times due to its use of SuperFlash technology. Sector and block erase commands are completed in just 18 ms, and a full chip erase operation is completed in 35 ms. Competitors’ devices require 10 to 20 s to complete a full chip erase operation, making the SST26VF approximately 400× faster. These fast erase times can provide a significant cost savings to customers, by minimizing the time required for testing and firmware updates, and therefore increasing their manufacturing throughput.Microchip SST26VF

Microchip’s SQI interface is a low pin count, high-speed 104 MHz quad-bit address and data multiplex I/O serial interface, which allows for high data throughput in a small package. This interface enables low-latency execute-in-place (XIP) capability with minimal processor buffer memory, reducing the overall design footprint compared to traditional parallel memory interfaces. The SST26VF family provides faster data throughput than a comparable x16 parallel flash device, without the associated high cost and high pin count of parallel flash. The SQI interface also offers full command-set backward compatibility for the ubiquitous SPI protocol.

Designed for low power consumption, the SST26VF is ideal for energy-efficient embedded systems. Standby current consumption is 15 µA (typical), and the active read current at 104 MHz is 15 mA (typical). The combination of 3-V operation with low power consumption and small-form-factor packaging makes the SST26VF devices an excellent choice for applications such as servers, printers, cloud computing systems, HDTV, Internet gateways, appliances, security systems, and a broad range of embedded systems.

The SST26VF devices also offer 100 years of data retention and device endurance of over 100,000 erase/write cycles. Enhanced safety features include software write protection of individual blocks for flexible data/code protection. In addition, the upper and lower 64 KB of memory are partitioned into smaller, 8-KB sectors that can both read- and write-lock. In addition, the devices include a One-Time Programmable (OTP) 2-KB Secure ID area, consisting of a 64-bit, factory-programmed unique ID and a user-programmable block. These features protect against unauthorized access and malicious read, program and erase intentions. The devices also include a JEDEC-compliant Serial Flash Discoverable Parameter (SFDP) table, which contains identifying information about the functions and capabilities of the SST26VF devices for simpler software design.

The three-member SST26VF family is available now for sampling and volume production in multiple package options, including eight-pin SOIC and SOIJ, 16-pin SOIC, eight-contact WDFN and 24-ball TBGA, as well as in die and wafer form. In 10,000-unit quantities, the 16-Mb SST26VF016B starts at $0.90 each, the 32-Mbit SST26VF032B starts at $1.17 each, and the 64-Mbit SST26VF064B starts at $1.84 each.

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Source: Microchip Technology


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