23LC1024-E/SN

23LC1024-E/SN is Microchip’s 1-Mbit Serial SRAM with an SPI interface. It stores 128K x 8 bits and is accessed via CS, SCK, SI, and SO. It is volatile memory (no nonvolatile option) and supports fast, random reads/writes with 256-byte page writes. SPI command set includes Read (03h), Fast Read (0Bh), Write (02h) after Write Enable (06h), and Write Disable (04h); WP provides hardware write protection. Outputs are tri‑stated when CS is high. Supply voltage is 2.7–3.6V. The “E” suffix indicates extended temperature grade (-40°C to +85°C); “-SN” denotes RoHS-compliant 8-pin SOIC packaging. Applications include fast data buffers, caches, parameter storage, and general MCU scratchpad memory requiring low pin count and SPI access. For exact timing, addressing details, and pinout, refer to the Microchip datasheet.

23LC1024-E/SN features (concise):
- 1 Mbit serial EEPROM (128K x 8)
- SPI-compatible interface (CS, CLK, DI, DO)
- 3-byte addressing for full memory space
- Random, sequential read; byte and page write (page size typically 32 bytes)
- Hardware write-protect (WP) and optional HOLD pin
- Low-power operation with standby mode
- Endurance: up to ≈1,000,000 write cycles; data retention typically years
- Supply voltage: 2.7V to 5.5V
- Operating temperature (industrial): -40°C to +85°C (E variant)
- Package: 8-pin SOIC, RoHS-compliant (SN) packaging
- Applications: small data storage, configuration data, logging for microcontrollers
Note: exact page size and timing can vary slightly by revision; refer to the datasheet for precise specs.

Pin count: 8 pins (8-pin SOIC).
Pin functions (for 23LC1024-E/SN):
- Pin 1: CS – Chip Select
- Pin 2: SO – Serial Output
- Pin 3: SI – Serial Input
- Pin 4: SCK – Serial Clock
- Pin 5: GND – Ground
- Pin 6: WP – Write Protect
- Pin 7: HOLD – Hold
- Pin 8: Vcc – Power supply
Interface: SPI-compatible serial SRAM (1 Mbit).

- Manufacturer: Microchip Technology Inc.
- What kind of company: A multinational American semiconductor company that designs, manufactures, and sells microcontrollers, memory ICs, and other analog/embedded solutions for embedded systems (publicly traded on NASDAQ as MCHP).

Applications of 23LC1024-E/SN (1-Mbit SPI Serial SRAM):
- Embedded microcontroller systems as a fast scratchpad RAM
- Data buffering in communications equipment (modems, routers, switches)
- Audio/video buffering and DSP data storage
- Sensor data acquisition and real-time buffers in industrial, automotive, and medical devices
- Code and data caching to reduce Flash/ROM accesses in portable devices
- Test, measurement, and instrumentation equipment for high-speed data capture

8-pin SOIC (Small Outline Integrated Circuit) package.