SRAM Brochure

Serial SRAM Memory
Serial SRAM Memory Family
www.microchip.com/SRAM
Serial SRAM Memory
Do you need more RAM in your application?
Does it need to be small, cheap, fast and low power?
Are you completing a design and need just a little more volatile memory?
Do you need a simple, inexpensive way to add RAM without
increasing the size of your microcontroller or ASIC?
Microchip’s new serial SRAM family provides a way to easily and inexpensively add external RAM to
almost any application. These serial devices use less power and fewer I/O connections than traditional
parallel SRAM. And, they allow designers to use a smaller microcontroller rather than moving to a larger
microcontroller just to get more on-board RAM.
Flexible RAM Expansion
Increased Performance
Quickly and easily add external SRAM
Get high-speed SRAM
■ 8 and 32 Kbyte options
■ Great for scratchpad, buffering and math-intensive
applications
■ Add functionality to your current design
■
■
■
■
■
Cost Effectiveness
20 MHz clock speed
Unlimited writes to the array (with no wear out)
Low standby and operating currents
Fast writes with zero latency
Write entire 32 Kbyte chip in 13 ms with one
command
Add features to your current microcontroller
and get to market faster
Flexibility: RAM where you need it
■
■
■
■
Microchip’s 8-, 16- and 32-bit microcontrollers and DSPs
have many on-board RAM options.
Familiar 4-pin SPI interface
Serial bus requires only 4 microcontroller I/O pins
No need to buy a large microcontroller just for the RAM
Cost-reduce your current design
RAM
MCU
The Serial Advantage
Typical
Parallel
SRAM
Microchip
Serial
SRAM
I/O Connection
16-20
4
ISTANDBY
3 mA
1 μA
IACTIVE
50 mA
1 - 10 mA
Lowest
Operating
Voltage
3.0V
1.7V
Footprint
100 mm2
20 mm2
Packages
28-TSSOP, 28-SOIC
8-TSSOP, 8-SOIC
And now...
Introducing stand-alone serial SRAM offering greater
design flexibility and the opportunity for RAM expansion.
RAM
Packages shown approximate size.
www.microchip.com/SRAM
MCU
SRAM
NEW
Serial SRAM Memory
Serial SRAM Product Family
Device
Density
Operating
Voltage
Maximum Speed
(MHz)
Temperature
Range
Packages
(all 8 leads)
23A640
8 KB (64 Kb)
1.7-1.95V
16
-40 to +85ºC
SOIC, PDIP, TSSOP
23K640
8 KB (64 Kb)
2.7-3.6V
20
-40 to +85ºC
SOIC, PDIP, TSSOP
23A256
32 KB (256 Kb)
1.7-1.95V
16
-40 to +85ºC
SOIC, PDIP, TSSOP
23K256
32 KB (256 Kb)
2.7-3.6V
20
-40 to +85ºC
SOIC, PDIP, TSSOP
Two density options:
8 and 32 Kbyte (64 and
256 Kbit) devices
High-speed SPI bus with
20 MHz maximum speed
Standard 4-pin SPI
interface (Chip select,
data in, data out, clock)
8-bit status register
controls operational
modes: byte, page or full
chip mode
Wide range of operating
conditions: -40 to +85ºC
options; 1.8 and 3V
Small, 8-lead SOIC, TSSOP
and PDIP packages
Low power operation:
1 uA typical standby current;
(500 nA for 1.8V version)
Get started today...
Actual Size
8-TSSOP
8-SOIC
Additional resources at www.microchip.com/SRAM
X Data sheets and application notes (with code)
X Verilog, IBIS models
X Usage recommendation application note
X ”Getting Started with Serial SRAM” web seminar
X Best practices web seminar
X Samples and on-line purchase options
www.microchip.com/SRAM
Support
Training
Microchip is committed to supporting its customers
in developing products faster and more efficiently. We
maintain a worldwide network of field applications
engineers and technical support ready to provide product
and system assistance. In addition, the following service
areas are available at www.microchip.com:
■ Support link provides a way to get questions
answered fast: http://support.microchip.com
■ Sample link offers evaluation samples of any
Microchip device: http://sample.microchip.com
■ Forum link provides access to knowledge base and
peer help: http://forum.microchip.com
■ Buy link provides locations of Microchip Sales Channel
Partners: www.microchip.com/sales
If additional training interests you, then Microchip can
help. We continue to expand our technical training options,
offering a growing list of courses and in-depth curriculum
locally, as well as significant online resources – whenever
you want to use them.
■ Regional Training Centers: www.microchip.com/rtc
■ MASTERs Conferences: www.microchip.com/masters
■ Worldwide Seminars: www.microchip.com/seminars
■ eLearning: www.microchip.com/webseminars
■ Resources from our Distribution and Third Party Partners
www.microchip.com/training
Sales Office Listing
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1/26/09
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respective companies. © 2009, Microchip Technology Incorporated. All Rights Reserved. Printed in the U.S.A. 2/09
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