New family of 3V Serial Quad I/O (SQI) interface SuperFlash memory devices

11-03-2015 | Microchip Technology | Semiconductors

Microchip has introduced a new family of 3V Serial Quad I/O (SQI) interface
SuperFlash memory devices. The SST26VF three-member '26 Series' SQI
interface family is available with 16-Mbit, 32-Mbit or 64-Mbit of memory and
is manufactured using Microchip’s high-performance CMOS SuperFlash
technology, which provides the industry’s fastest erase times and superior
reliability using SuperFlash technology, says the company.

Sector and block erase commands are completed in just 18ms, and a full chip
erase operation is completed in 35ms. Competing devices typically require
10 to 20 seconds to complete a full chip erase operation, making the SST26VF
approximately 400 times faster. These fast erase times can provide a
significant cost savings to customers, by minimising the time required for
testing and firmware updates, and therefore increasing their manufacturing

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 Serial Peripheral
Interface (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 3V operation with low power consumption and small-form-factor
packaging makes the SST26VF devices ideal 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 exceptional quality and reliability, with 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; the upper and lower 64
Kbytes of memory are partitioned into smaller, 8 Kbyte sectors that can both
read- and write-lock. In addition, the devices include a One-Time
Programmable (OTP) 2 Kbyte Secure ID area, consisting of a 64-bit,
factory-programmed unique ID and a user-programmable block. These features
protect against unauthorised access and malicious read, programme 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 family comprises the 16-Mbit SST26VF016B; the 32-Mbit SST26VF032B; and
the 64-Mbit SST26VF064B. The devices are available now for sampling and
volume production in multiple package options, including 8-pin SOIC and
SOIJ, 16-pin SOIC, 8-contact WDFN and 24-ball TBGA, as well as in die and
wafer form, says the company.

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