1 Mbit Versatile SPI / 8-Bit Parallel Bus SRAM

Block diagram

Introduction

The VLSI Solution VS23S010 is an easy to use, large capacity one megabit static RAM device. The memory can be accessed via a standard SPI compatible serial bus (1, 2 and 4-bit modes), or via an 8080-type 8-bit parallel bus similar to nand flash devices.

One of the main applications for the VS23S010 is microcontroller RAM extension. Internet streaming applications, which are becoming increasingly popular, will benefit from the large buffer memory provided by VS23S010.

In addition to being used purely as a memory storage device the VS23S010 also contains a pattern generation logic. When VS23S010's RAM is accessed through the SPI bus, it can simultaneously output a repeating memory data pattern through four of its parallel bus pins. This feature significantly reduces the computing requirement of a microcontroller for applications that require periodic output from the memory, such as a video frame buffer.

Features

  • Flexible 1.5V - 3.6V operating voltage
  • 131,072 x 8-bit SRAM organization
  • Serial Peripheral Interface (SPI) compatible
    • SPI operating modes
      • Byte read and write
      • Sequential mode
    • XHOLD and XWP pins
    • Supports Single, Dual and Quad input read and write
    • Fast operation: the whole memory can be filled or read in 262176 cycles (Quad-I/O SPI)
  • 8-bit Parallel Interface (Simplified 8080 and NAND FLASH Type Interface)
    • Sequential read and write in 4 byte blocks
    • Fast operation, the whole memory can be filled in 131076 cycles and read in 131077 cycles
  • Integrated pattern generator
    • 4-bit and 2-bit output modes
    • Configurable frame length
    • IRQ output for synchronization
  • High operating frequencies
    • Up to 36 MHz for SPI
    • Over 48 MHz for pattern generator
    • FMCLK/3 MHz for SPI when pattern generator enabled
    • 15 MHz for 8-bit parallel interface
  • Low-power CMOS technology
    • Read current 130 µA at 1 MHz (SO=0, TA=+25°C, VDD=3.3V)
    • Standby current 35 µA (TA=+25°C, VDD=3.3V)
  • Industrial temperature range from -40°C to +85°C
  • Pb-Free and RoHS compliant package

Availability

Engineering samples are available in limited quantities. For samples use our VS23S010 sample request form at http://www.vlsi.fi/samples/vs23s010 .

Fully tested and qualified mass production devices are expected to be available in early 2013.

Package

SOIC16 300 mil