Microchip Technology 24LC16BHT-I/MS

Overview

24LC16BHT-I/MS from Microchip Technology Inc. is a 16-Kbit I²C-compatible serial EEPROM organized as eight 256 × 8-bit blocks, operating at 2.5V–5.5V with 400 kHz max clock frequency and industrial temperature range (–40°C to +85°C). It features hardware write-protect for half-array (400h–7FFh), 16-byte page write buffer, and 1 μA standby current - deployed in embedded system configuration storage, sensor calibration data retention, and power-management parameter backup.

For engineers reviewing the 24LC16BHT-I/MS datasheet, 24LC16BHT-I/MS pinout, 24LC16BHT-I/MS application, or 24LC16BHT-I/MS equivalent, key selection considerations include VCC compatibility (2.5V minimum), I²C timing compliance at 400 kHz, MSOP-8 package footprint constraints, and half-array write-protection logic tied to WP pin state.

Technical Context

The 24LC16BHT-I/MS implements a two-wire I²C slave interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal architecture includes an 8-bit address pointer, 16-byte page latch, and HV generator for EEPROM programming - enabling self-timed erase/write cycles without external high-voltage supply.

It supports three read modes (current address, random, sequential) and two write modes (byte and page), with ACK polling used to detect write completion. The WP pin controls write access: tied to VSS enables full-array writes; tied to VCC protects addresses 400h–7FFh while allowing reads across full 000h–7FFh range.

Key Specifications

Pinout & Package

24LC16BHT-I/MS is housed in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad optionally connected to VSS. Pin 1 is marked by a dot or beveled edge; pins A0–A2 are unconnected and may be left floating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with 24LC16BHT-I/MS, the 24AA16HT-I/MS extends low-voltage operability but shares identical timing and packaging - making it a functional substitute only when 1.7V–2.49V operation is mandatory. The AT24C16C-MAHM-T provides comparable interface and footprint but trades retention longevity and half-array protection granularity for broader vendor availability.

Availability

24LC16BHT-I/MS is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration storage, smart energy metering, and automotive body control modules requiring stable component supply, long-term data integrity, and AEC-Q100-compliant nonvolatile memory.

Supply support for 24LC16BHT-I/MS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design, manufacturing, and sales operations.

The 24LC16BHT-I/MS belongs to Microchip's 24XX16H family of I²C serial EEPROMs, designed specifically for reliable, low-power, and noise-immune configuration and calibration data storage in space-constrained embedded systems.

FAQ

What is the minimum VCC voltage required for reliable operation of the 24LC16BHT-I/MS?

The 24LC16BHT-I/MS requires a minimum VCC of 2.5V for guaranteed operation across its full industrial temperature range (–40°C to +85°C). Operation below 2.5V is not specified and may result in unreliable read/write behavior or failure to acknowledge I²C transactions. This distinguishes it from the 24AA16H variant, which supports down to 1.7V.

Does the 24LC16BHT-I/MS support 1 MHz I²C communication?

No, the 24LC16BHT-I/MS is rated for a maximum clock frequency of 400 kHz under all specified VCC and temperature conditions. It does not support fast-mode Plus (1 MHz) I²C. For 1 MHz operation, consider the 24FC16H variant, which is explicitly characterized for 1 MHz at 1.7V–5.5V.

How does the WP pin function on the 24LC16BHT-I/MS?

When the WP pin of the 24LC16BHT-I/MS is tied to VCC, write operations to memory addresses 400h–7FFh are inhibited while reads remain fully enabled; tying WP to VSS enables full-array read/write access. This hardware-based protection operates independently of I²C commands and requires no firmware intervention.

What is the purpose of ACK polling with the 24LC16BHT-I/MS?

ACK polling allows a host controller to determine write completion by repeatedly sending the 24LC16BHT-I/MS control byte (R/W = 0) after issuing a Stop condition. The device stops acknowledging until its internal 5 ms write cycle finishes - enabling precise, delay-free synchronization without fixed timeouts.

Is the 24LC16BHT-I/MS qualified for automotive applications?

Yes, the 24LC16BHT-I/MS is AEC-Q100 qualified for automotive applications. Its industrial temperature range (–40°C to +85°C), 4 kV ESD protection, and robust I²C interface with Schmitt-trigger inputs make it suitable for use in body control modules, infotainment systems, and other automotive subsystems outside the engine compartment.