25LC160-I/P

Overview

The Microchip Technology 25LC160-I/P is a 16 Kbit (2048 x 8-bit) Serial Electrically Erasable PROM. It operates within a voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 2 MHz in the Industrial temperature range (-40°C to +85°C). The device utilizes an SPI-compatible serial bus with separate data input (SI) and output (SO) lines, controlled by Chip Select (CS), Serial Clock (SCK), and Hold (HOLD) signals. Key electrical characteristics include a typical standby current of 500 nA, a maximum write current of 3 mA, and a typical read current of 500 µA. It features self-timed erase and write cycles with a maximum duration of 5 ms.

Feature Summary

• Supports block-level write protection allowing configuration to protect none, one-quarter, one-half, or the entire memory array via Status register bits.
• Includes built-in power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes during normal operation.
• Provides a Hold pin function that suspends serial communication without resetting the sequence, enabling host servicing of higher priority interrupts.

Applications

• Data storage for microcontroller systems requiring non-volatile memory retention
• Configuration parameter storage in industrial control devices
• Calibration data retention in sensor interfaces

Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature range (-40°C to +85°C) and the '/P' indicates the 8-lead PDIP package. Confirm the datasheet revision matches the required specifications, as this component is marked as not recommended for new designs; consider newer alternatives like the 25LC160A/B series if long-term supply assurance is critical.

Selection Notes

Select this part when a 2.5V to 5.5V operating voltage is required, distinguishing it from the 1.8V-capable 25AA160 variant. Ensure the system design accommodates the 2 MHz maximum clock speed at the selected supply voltage. Verify that the 8-pin PDIP package fits the mechanical constraints, noting that the SOIC equivalent uses the 'SN' suffix.

Part Context

This component belongs to the 25XX160 family of 16 Kbit SPI Serial EEPROMs, which also includes the 25AA160 (1.8V operation) and 25C160 (Automotive grade). The datasheet explicitly states that this generation is not recommended for new designs, recommending the 25AA160A/B or 25LC160A/B series instead.

Replacement Considerations

Public confirmed substitutes include the 25LC160A-I/P and 25LC160B-I/P. These updated variants maintain similar functionality but may offer improved performance or availability compared to the legacy 25LC160 model.