AN1004 datasheet(9/16 Pages) MICROCHIP

9 / 16 page

Serial Memory Products

The Serial Advantage – Not Just Price

Feature

Traditional Parallel SRAM

Microchip Serial SRAM

I/O Connection to MCU

16-20

Standby Current

3 mA

1 μA

Active Current

50 mA

1-10 mA

Lowest Operating Voltage

3.0V

1.7V

Footprint

100 mm2

20 mm2

Smallest Packages

28-TSSOP, 28-SOIC

8-TSSOP, 8-SOIC

Do you need a simple, inexpensive way to add RAM to

your application? Microchip offers external RAM where

you need it.

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.

Serial SRAM

Flexible RAM Expansion

Quickly and easily add external high-speed SRAM

■ 8 and 32 Kbyte options

■ 20 MHz clock speed

■ Low standby and operating currents

■ Fast writes with zero latency

■ Unlimited endurance

■ 8-SOIC, 8-TSSOP, 8-PDIP

Increased Performance

Add features to your current microcontroller

and get to market faster

■ Add functionality to your current design

■ No need to buy a large microcontroller just for the RAM

■ Familiar 4-pin SPI interface

■ Cost reduce your current design

■ Scratchpad, buffering, high endurance applications

■ Applications: metering, POS terminals, printers, internet radio,

ethernet, Wi-Fi

■ Replace parallel RAM

■ Any application needing low cost RAM

23A640

16 MHz

1.5V-1.95V

23K640

20 MHz

2.7V-3.6V

64 Kb

23A256

16 MHz

23K256

20 MHz

256 Kb

Parallel

SRAM

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