Microchip Technology 93LC76CT-I/SN

Overview

93LC76CT-I/SN from Microchip Technology Inc. is an 8Kbit, low-voltage, serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5V VCC range, and industrial temperature grade (–40°C to +85°C). It features 1024 × 8-bit organization (fixed, no ORG pin), self-timed erase/write cycles, 1M endurance, and >200-year data retention. Used in embedded system configuration storage, sensor calibration memory, and power-management parameter backup.

For engineers reviewing the 93LC76CT-I/SN datasheet, 93LC76CT-I/SN pinout, 93LC76CT-I/SN application, or 93LC76CT-I/SN equivalent, key selection criteria include its fixed 8-bit x1024 organization, absence of ORG/PE pins, SOIC-8 package compatibility, industrial-grade reliability, and Microwire protocol timing compliance at up to 3 MHz (VCC ≥ 4.5V).

Technical Context

This device implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals. It operates without external address latches or parallel bus logic, relying on opcode-driven instruction set (READ, WRITE, ERASE, EWEN/EWDS) clocked on rising CLK edges. All operations are initiated by a Start condition (CS high + DI high on first CLK rising edge).

Internal architecture includes a dedicated address counter, mode decode logic, and output buffer with Ready/Busy status signaled via DO pin during erase/write. Power-on/off protection circuitry ensures data integrity below VCC threshold (1.5V typical), and write cycles require prior EWEN command execution - the device powers up in EWDS state.

Key Specifications

Pinout & Package

8-lead SOIC (SN) package per Microchip DS21796M, JEDEC MS-012AC, 3.9 mm × 4.9 mm body, 1.27 mm pitch. Pin 1 marked by laser dot or bevelled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 93LC76A-I/SN, the 93LC76CT-I/SN offers identical electrical and functional behavior with EIA-481 tape compliance for high-speed placement; versus AT25080B-SSHL-T, it preserves Microwire timing, Ready/Busy signaling, and EWEN/EWDS security model - critical for legacy or resource-constrained designs.

Availability

93LC76CT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and power management backup requiring stable component supply across multi-year production cycles.

Supply support for 93LC76CT-I/SN 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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 93LC76 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power, nonvolatile memory applications in industrial, automotive, and consumer systems where Microwire interface compatibility and robust data retention are essential.

FAQ

What is the memory organization of the 93LC76CT-I/SN?

The 93LC76CT-I/SN has a fixed 1024 × 8-bit (8Kbit) organization. Unlike the 'C' variants (e.g., 93LC76C), it does not feature an ORG pin - confirming it is an 'A' version device with dedicated x8 configuration. This eliminates external logic for word-size selection and simplifies PCB layout.

Does the 93LC76CT-I/SN have Program Enable (PE) or ORG pins?

No, the 93LC76CT-I/SN does not include PE or ORG pins. Per the Device Selection Table and Pin Function Table in DS21796M, these pins are exclusive to 'C' versions (e.g., 93LC76C). The 'T' suffix in 93LC76CT-I/SN denotes tape-and-reel packaging - the underlying die is identical to 93LC76A-I/SN.

What is the maximum clock frequency supported by the 93LC76CT-I/SN?

The 93LC76CT-I/SN supports up to 3 MHz clock frequency when VCC is 4.5 V to 5.5 V. At 2.5 V ≤ VCC < 4.5 V, maximum frequency drops to 2 MHz; below 2.5 V, it is rated for 1 MHz. These limits are defined in Table 1-2 (AC Characteristics) of DS21796M and ensure reliable setup/hold timing.

How does the Ready/Busy status work on the 93LC76CT-I/SN?

The 93LC76CT-I/SN signals Ready/Busy status on the DO pin: DO = low indicates ongoing erase/write; DO = high means operation complete. To read status, CS must be brought high after ≥250 ns low time (TCSL); DO returns to High-Z when CS is low. No external pull-up is required as DO drives actively.

Is the 93LC76CT-I/SN RoHS compliant and Pb-free?

Yes, the 93LC76CT-I/SN is Pb-free and RoHS compliant, with Matte Tin (Sn) finish on all leads. This is explicitly stated in the Features section of DS21796M and confirmed in Microchip's Packaging Specification documents. The SOIC-8 (SN) package meets JEDEC J-STD-020 moisture sensitivity level 3.