23K256T-I/ST

Memory IC Overview

The Microchip Technology 23K256T-I/ST is a 256 Kbit Serial SRAM device accessed via a SPI-compatible serial bus. It features a 32,768 x 8-bit organization with a 32-byte page size. The component operates within a supply voltage range of 2.7V to 3.6V and supports clock frequencies up to 20 MHz. It utilizes low-power CMOS technology, offering read currents of 3 mA at 1 MHz and maximum standby current of 4 µA at +85°C. The device is housed in an 8-lead TSSOP package and supports industrial temperature ranges from -40°C to +85°C.

Memory IC Feature Summary

• Supports flexible operating modes including byte, page, and sequential read/write operations.
• Includes a HOLD pin to suspend transmission during serial sequences without resetting the sequence.
• Features a STATUS register for configuring device operating modes and enabling/disabling the hold function.

Memory IC Applications

• Data logging systems requiring non-volatile-like temporary storage
• Microcontroller peripheral memory expansion
• Buffering applications in embedded control systems

Memory IC Procurement Notes

Verify the specific ordering suffix 'T' corresponds to tape-and-reel packaging rather than tube packaging when sourcing. Confirm the 'I' suffix indicates the industrial temperature grade (-40°C to +85°C). Ensure the voltage range (2.7V–3.6V) matches the target system power rails, as this variant differs from the lower-voltage 23A256 series. Cross-reference the datasheet revision to confirm pinout consistency.

Memory IC Selection Notes

Select this component for designs requiring fast random access memory accessible through standard SPI interfaces. It is suitable for applications needing moderate data retention speeds with low power consumption. Consider the 32-byte page boundary limitations if large contiguous writes are required without sequential mode. Verify that the host microcontroller can support the required SPI clock speeds and voltage levels.

Memory IC Part Context

This part belongs to the 23X256 family of 256 Kbit Serial SRAMs from Microchip Technology. It shares functional similarities with the 23A256 but operates at higher supply voltages. The family supports various packages including PDIP, SOIC, and TSSOP. The 'T' suffix denotes reel packaging, while 'I' specifies the industrial temperature rating.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include 23K256-I/ST (tube packaging), 23K256-E/ST (automotive grade), and 23A256T-I/ST (lower voltage range).