Microchip Technology AT93C86-10TI-2.7

Overview

AT93C86-10TI-2.7 from Atmel (now Microchip) is a 16-kbit serial EEPROM with user-selectable 2048 × 8 or 1024 × 16 organization, 3-wire SPI-compatible interface, 2.7–5.5 V operation, and automotive-grade temperature range (−40°C to +85°C). It delivers 1 million write cycles, 100-year data retention, and Schmitt-triggered noise-immune inputs for reliable operation in industrial control and automotive body electronics.

For engineers reviewing the AT93C86-10TI-2.7 datasheet, AT93C86-10TI-2.7 pinout, AT93C86-10TI-2.7 application, or AT93C86-10TI-2.7 equivalent, key selection criteria include low-voltage compatibility, self-timed 10 ms write cycle, TSSOP-8 packaging, ORG-pin configurable memory width, and READY/BUSY status reporting via DO pin during programming.

Technical Context

The AT93C86-10TI-2.7 implements a synchronous 3-wire serial interface (CS/SK/DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Memory organization is dynamically selected by the ORG pin: tied to VCC enables 1024 × 16 mode; grounded enables 2048 × 8 mode.

It features internal clock generation, no external erase cycle required, and status feedback via DO pin when CS is asserted high during write/erase operations. All timing parameters-including tWP (10 ms max), tSKH/tSKL (250 ns min), and tCS (250 ns min)-are specified across 2.7–5.5 V and −40°C to +85°C.

Key Specifications

Pinout & Package

AT93C86-10TI-2.7 is housed in an 8-lead TSSOP package (JEDEC MO-153, variation AA; body width 4.4 mm, lead pitch 0.65 mm). Pin 1 is marked by corner chamfer per JEDEC standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95128-WMN6TP and STK10C47, the AT93C86-10TI-2.7 uniquely balances low-voltage operation, hardware-selectable memory width, and real-time status feedback in a compact TSSOP-8 package-making it optimal for resource-constrained embedded systems requiring deterministic EEPROM behavior.

Availability

AT93C86-10TI-2.7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, medical calibration systems, and smart energy metering requiring stable component supply, extended temperature qualification, and long-term obsolescence management.

Supply support for AT93C86-10TI-2.7 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

Atmel Corporation, now part of Microchip Technology, designs high-reliability microcontrollers, memory, and analog ICs for industrial, automotive, and consumer applications.

The AT93C86 series was developed as a low-power, pin-efficient serial EEPROM family targeting cost-sensitive embedded systems needing robust nonvolatile storage with minimal MCU GPIO usage.

FAQ

What is the function of the ORG pin on the AT93C86-10TI-2.7?

The ORG pin on the AT93C86-10TI-2.7 selects internal memory organization: connecting ORG to VCC configures the device as 1024 × 16 (word mode), while grounding ORG selects 2048 × 8 (byte mode). If left unconnected, the internal 1 MΩ pull-up defaults to x16 mode. This hardware-selectable feature eliminates firmware overhead for address mapping and enables one PCB design to support two memory access patterns. The AT93C86-10TI-2.7 does not require external pull-up/down resistors unless layout demands explicit biasing.

Does the AT93C86-10TI-2.7 support true SPI communication?

The AT93C86-10TI-2.7 uses a 3-wire serial interface (CS, SK, DI/DO) that is functionally compatible with SPI but not electrically identical to standard SPI modes-it lacks separate SI/SO lines and operates in half-duplex mode with shared DI/DO. It accepts standard SPI clock frequencies up to 2 MHz at 5 V and supports standard SPI master peripherals without protocol translation. The AT93C86-10TI-2.7 does not require CPOL/CPHA configuration, simplifying driver development compared to full SPI devices.

How is READY/BUSY status reported during write operations on the AT93C86-10TI-2.7?

During a write cycle, the AT93C86-10TI-2.7 outputs READY/BUSY status on the DO pin when CS is driven high after being held low for ≥250 ns (tCS). A logic '1' on DO indicates completion; a logic '0' indicates ongoing programming. This status is valid only while CS remains active during the self-timed tWP interval (max 10 ms). The AT93C86-10TI-2.7 does not support polling via dedicated status register-status is exclusively accessible through this DO pin behavior.

What is the maximum clock frequency supported by the AT93C86-10TI-2.7 at 3.3 V operation?

The AT93C86-10TI-2.7 supports a maximum SK clock frequency of 1 MHz at 2.7–5.5 V operation, as specified in the AC Characteristics table for VCC ≤ 2.7 V and 2.7 V ≤ VCC ≤ 5.5 V ranges. At 3.3 V, the device operates within the 2.7–5.5 V specification band and therefore maintains the 1 MHz limit-not the 2 MHz limit reserved for 4.5–5.5 V operation. The AT93C86-10TI-2.7's timing parameters (tSKH, tSKL, tCS) are all guaranteed at 250 ns minimum across its full voltage range, ensuring reliable timing margins at 1 MHz.

Is the AT93C86-10TI-2.7 RoHS compliant and lead-free?

Yes, the AT93C86-10TI-2.7 is lead-free and RoHS compliant. The "-TI" suffix in the ordering code denotes the 8-lead TSSOP package, and Atmel's official documentation confirms that all -TI variants shipped after 2006 meet EU RoHS Directive 2011/65/EU requirements. The device uses matte tin lead finish and contains no restricted substances above threshold limits. The AT93C86-10TI-2.7 is suitable for use in environmentally regulated markets including the European Union, China, and South Korea.