Microchip | 25LC320/SN

The 25LC320 (25XX320*) are 32 Kbit serial Electrically Erasable PROMs. The memory is accessed via a simple Serial Peripheral Interface (SPI™) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a Chip Select [CS(bar)] input.

Communication to the device can be paused via the hold pin [HOLD(bar)]. While the device is paused, transitions on its inputs will be ignored, with the exception of Chip Select, allowing the host to service higher priority interrupts.

Features:

• Low-power CMOS technology:
  • Write current: 3 mA maximum
  • Read current: 500 μA typical
  • Standby current: 500 nA typical
• 4096 x 8 bit organization
• 32 byte page
• Write cycle time: 5 ms maximum
• Self-timed erase and write cycles
• Block write protection:
  • Protect none, 1/4, 1/2 or all of array
• Built-in write protection:
  • Power on/off data protection circuitry
  • Write enable latch
  • Write-protect pin
• Sequential read
• High reliability:
  • Endurance: 1 M E/W cycles
  • Data retention: > 200 years
  • ESD protection: > 4000 V
• 8-pin PDIP, SOIC and TSSOP packages
• 14-lead TSSOP package
• Temperature ranges supported:
  • Industrial (I): -40°C to +85°C