Microchip Technology AT93C86A-10TU-2.7

Overview

AT93C86A-10TU-2.7 from Microchip Technology is a three-wire serial EEPROM with 16-Kbit capacity (2,048 × 8 or 1,024 × 16 organization), operating from 2.7V to 5.5V, rated for -40°C to +85°C industrial temperature range, featuring Schmitt-trigger inputs and self-timed write cycles ≤10 ms - used for configuration storage in embedded controllers and sensor modules.

For engineers reviewing the AT93C86A-10TU-2.7 datasheet, AT93C86A-10TU-2.7 pinout, AT93C86A-10TU-2.7 application, or AT93C86A-10TU-2.7 equivalent, key selection considerations include voltage grade (2.7V min), 8-lead TSSOP package, ORG-pin-selectable memory width, 1 MHz max clock at 2.7V, and industrial-grade reliability with 1M write cycles and 100-year data retention.

Technical Context

The AT93C86A-10TU-2.7 implements a synchronous three-wire interface (CS/SK/DI/DO) with dual memory organization selectable via the ORG pin (x8 or x16), supporting sequential read and status polling via DO during erase/write. Its internal power-on reset (POR) circuit enforces tPUP ≥100 µs delay before command acceptance.

It uses on-chip high-voltage generation for EEPROM programming, eliminating external VPP requirements, and integrates noise-suppressing Schmitt-trigger inputs with 5 pF input capacitance. Write operations require explicit EWEN/EWDS command sequencing and are disabled by default at power-up.

Key Specifications

Pinout & Package

AT93C86A-10TU-2.7 is supplied in an 8-lead TSSOP package (3.0 mm × 4.4 mm body, 0.65 mm pitch), RoHS-compliant and halide-free. Pin 1 is marked with a dot; pin 1 = CS, pin 2 = SK, pin 3 = DI, pin 4 = DO, pin 5 = GND, pin 6 = ORG, pin 7 = NC, pin 8 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95128-WMN6TP and 25AA160C-I/P, the AT93C86A-10TU-2.7 offers unique ORG-pin memory-width selection, deterministic 1 MHz timing at 2.7V, and industry-standard three-wire protocol - making it optimal for cost-sensitive industrial designs requiring hardware-configurable data width and minimal I/O footprint.

Availability

AT93C86A-10TU-2.7 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical sensor calibration requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for AT93C86A-10TU-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

Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with ISO 9001-certified manufacturing and global distribution.

The AT93C86A-10TU-2.7 belongs to Microchip's legacy Atmel EEPROM family, designed specifically for low-pin-count, low-power configuration storage in resource-constrained embedded systems where reliability and voltage flexibility are critical.

FAQ

What is the meaning of "-10TU-2.7" in AT93C86A-10TU-2.7?

The suffix "-10TU-2.7" identifies the specific variant: "10" indicates 10 ms maximum write cycle time, "TU" denotes 8-lead TSSOP package, and "2.7" specifies the minimum operating voltage of 2.7V. This distinguishes it from other variants like AT93C86A-10SU-1.8 (SOIC, 1.8V min) or AT93C86A-10PU-2.7 (PDIP). The AT93C86A-10TU-2.7 is fully compatible with the AT93C86A functional specification and shares identical pinout and command set.

Can the AT93C86A-10TU-2.7 be used with a 1.8V system?

No - the AT93C86A-10TU-2.7 is rated for 2.7V to 5.5V operation only. It is not guaranteed to function correctly below 2.7V. For 1.8V systems, use the AT93C86A-10SU-1.8 (SOIC) or AT93C86A-10TU-1.8 (TSSOP) variants, which are characterized down to 1.8V and support reduced clock rates (250 kHz max). Using the AT93C86A-10TU-2.7 below 2.7V may result in unreliable reads, failed writes, or undefined behavior.

How does the ORG pin affect memory addressing in AT93C86A-10TU-2.7?

When ORG is tied to VCC, the AT93C86A-10TU-2.7 operates in 1,024 × 16 mode: addresses A9–A0 select 16-bit words, and READ/WRITE commands transfer 16 bits per cycle. When ORG is tied to GND, it operates in 2,048 × 8 mode: addresses A10–A0 select 8-bit bytes, and commands transfer 8 bits. The AT93C86A-10TU-2.7 does not auto-detect ORG state - the hardware connection permanently sets the organization at power-up.

Is the NC pin on AT93C86A-10TU-2.7 required to be grounded?

No - pin 7 (NC) is internally unconnected and must not be driven. Microchip recommends leaving it floating or connecting it to GND for mechanical stability and EMI reduction; it must never be tied to VCC or driven by external logic. Doing so risks latch-up or damage. All functional operation of the AT93C86A-10TU-2.7 is independent of NC pin state, and its presence is solely for package symmetry and thermal dissipation in the 8-lead TSSOP outline.

Does AT93C86A-10TU-2.7 support sequential read across address boundaries?

Yes - when CS remains high after a READ command, the AT93C86A-10TU-2.7 automatically increments its internal address pointer and outputs subsequent bytes or words without requiring new address fields. In x8 mode, it wraps from address 2047 back to 0; in x16 mode, it wraps from 1023 to 0. No dummy bit is inserted between consecutive reads, enabling continuous streaming - a feature confirmed in the AT93C86A-10TU-2.7 datasheet Figure 5-1 and Section 5.1.