Product Description
The Serial Quad I/O™ (SQI™) family of flash-memory
devices features a six-wire, 4-bit I/O interface that allows for
low-power, high-performance operation in a low pin-count
package. SST26WF040B/040BA and SST26WF080B/
080BA also support full command-set compatibility to traditional
Serial Peripheral Interface (SPI) protocol. System
designs using SQI flash devices occupy less board space
and ultimately lower system costs.
All members of the 26 Series, SQI family are manufactured
with proprietary, high-performance CMOS SuperFlash®
technology. The split-gate cell design and thick-oxide tunneling
injector attain better reliability and manufacturability
compared with alternate approaches.
The SST26WF040B/040BA and SST26WF080B/
080BA significantly improves performance and reliability,
while lowering power consumption. This device
writes (Program or Erase) with a single power supply of
1.65-1.95V. The total energy consumed is a function of
the applied voltage, current, and time of application.
Since for any given voltage range, the SuperFlash
technology uses less current to program and has a
shorter erase time, the total energy consumed during
any Erase or Program operation is less than alternative
flash memory technologies.
SST26WF040B/040BA and SST26WF080B/080BA is
offered in 8-contact WDFN (6 mm x 5 mm), 8-lead SOIC
(150 mil), 8-contact USON, and 8-ball XFBGA (Z-Scale™)
packages. See Figure 2-1 for pin assignments.
Two configurations are available upon order:
SST26WF040B and SST26WF080B default at powerup
has the WP# and Hold# pins enabled and
SST26WF040BA and SST26WF080BA default at
power-up has the WP# and Hold# pins disabled.

Features
• Single Voltage Read and Write Operations
- 1.65-1.95V
• Serial Interface Architecture
- Mode 0 and Mode 3
- Nibble-wide multiplexed I/O’s with SPI-like serial
command structure
- x1/x2/x4 Serial Peripheral Interface (SPI) Protocol
• High Speed Clock Frequency
- 104 MHz max
• Burst Modes
- Continuous linear burst
- 8/16/32/64 Byte linear burst with wrap-around
• Superior Reliability
- Endurance: 100,000 Cycles (min)
- Greater than 100 years Data Retention
• Low Power Consumption:
- Active Read current: 15 mA (typical @ 104 MHz)
- Standby current: 10 μA (typical)
- Deep Power-Down current: 1.8 μA (typical)
• Fast Erase Time
- Sector/Block Erase: 18 ms (typ), 25 ms (max)
- Chip Erase: 35 ms (typ), 50 ms (max)
• Page-Program
- 256 Bytes per page in x1 or x4 mode
• End-of-Write Detection
- Software polling the BUSY bit in status register
• Flexible Erase Capability
- Uniform 4 KByte sectors
- Four 8 KByte top and bottom parameter overlay
blocks
- One 32 KByte top and bottom overlay block
- Uniform 64 KByte overlay blocks
• Write-Suspend
- Suspend Program or Erase operation to access
another block/sector
• Software Reset (RST) mode
• Software Write Protection
- Individual-Block Write Protection with permanent
lock-down capability
- 64 KByte blocks, two 32 KByte blocks, and
eight 8 KByte parameter blocks
- Read Protection on top and bottom 8 KByte
parameter blocks
• Security ID
- One-Time Programmable (OTP) 2 KByte,
Secure ID
- 64 bit unique, factory pre-programmed identifier
- User-programmable area
• Temperature Range
- Industrial: -40°C to +85°C
• Packages Available
- 8-contact WDFN (6mm x 5mm)
- 8-lead SOIC (150 mil)
- 8-contact USON (2mm x 3mm)
- 8-ball XFBGA (Z-Scale™)
• All devices are RoHS compliant