1 Mbit Versatile SPI / 8-Bit Parallel Bus SRAM with Video Display Controller

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 Video Display Controller that can output NTSC or PAL composite video from the memory array data to implement a video frame buffer.

VS23S010 is available in two variants: the fully featured LQFP-48 variant VS23S010D-L, and the memory-only featured Narrow SOIC8 VS23S010D-S which omits video and the 8-bit parallel bus.

• Flexible 1.5V - 3.6V operating voltage
• 131,072 x 8-bit SRAM organization
• Available in two packages
  • VS23S010D-L: LQFP48 7x7mm
  • VS23S010D-S: Narrow SOIC8, 150 mils wide
• Serial Peripheral Interface (SPI) compatible
• Byte, Page, and Sequential modes
• Supports Single, Dual and Quad input read and write
• Fast operation: the whole memory can be filled or read in 262177 cycles (Quad-I/O SPI)
• XHOLD and XWP pins
• 8-bit Parallel Interface (Simplified 8080 and NAND FLASH Type Interface, VS23S010D-L only)
  • Sequential read and write in 4-byte blocks
  • Fast operation, the whole memory can be filled or read in 131077 cycles
• Integrated video display controller (VS23S010C-L only)
  
  • Supports NTSC and PAL composite video formats
    • NTSC requires 3.58 or 28.64 MHz (8x colour carrier) crystal / clock input
    • PAL requires 4.43 or 35.47 MHz (8x colour carrier) crystal / clock input
  • Fully configurable by user
  • 9-bit Video DAC and 8x video PLL
• High operating frequencies
  • Up to 38 MHz for SPI
  • Up to 40 MHz for 8-bit parallel interface (VS23S010D-L only)
  • Over 35 MHz for Video Display Controller
• Low-power CMOS technology
  • Read current 340 µA at 1 MHz (Single I/O, SO=0, TA=+85°C, VDD=3.3V)
• Industrial temperature range from -40°C to +85°C
• Pb-Free and RoHS compliant package

VS23S010D-S and VS23D010D-L devices are in pre-production stage and available in moderate quantities.