Microchip Technology AT93C46-10TU-2.7-T

Overview

AT93C46-10TU-2.7-T from Microchip Technology (formerly Atmel) is a 1K-bit three-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, operating from 2.7V to 5.5V, featuring 2 MHz clock rate at 5V, 10 ms max self-timed write cycle, and automotive-grade reliability for industrial control and embedded configuration storage.

For engineers reviewing the AT93C46-10TU-2.7-T datasheet, AT93C46-10TU-2.7-T pinout, AT93C46-10TU-2.7-T application, or AT93C46-10TU-2.7-T equivalent, this page delivers verified electrical specs, TSSOP-8 package details, functional timing behavior, and validated alternative parts for legacy design continuity and supply chain resilience.

Technical Context

The AT93C46-10TU-2.7-T implements a synchronous three-wire interface (CS/SK/DI/DO) with ORG pin-controlled memory mapping-logic high selects 64 × 16 mode, ground selects 128 × 8 mode-and supports full instruction set including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. It requires no external erase cycle prior to write.

Its architecture enables status polling via DO during write/erase operations when CS is asserted post-instruction, with Ready/Busy output synchronized to SK edges. The device maintains data retention for 100 years and endures 1 million write cycles, meeting extended temperature (−40°C to +85°C) and lead-free/halogen-free requirements per ordering code suffix.

Key Specifications

Pinout & Package

AT93C46-10TU-2.7-T is housed in an 8-lead Thin Shrink Small Outline Package (TSSOP), 3.0 mm × 4.4 mm body, 0.65 mm pitch, with gull-wing leads and moisture sensitivity level 1 (MSL1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT93C46-10TU-2.7-T, the AT93C46A-10TU-2.7-T resolves ORG pin ambiguity in unconnected configurations, while M95128-WMN6TP trades interface simplicity for higher density and speed-making the original part optimal for cost-sensitive, GPIO-constrained legacy platforms needing exact 1K capacity.

Availability

AT93C46-10TU-2.7-T is available at Aetrix Electronics and suitable for industrial PLC configuration storage, automotive body control modules, medical diagnostic calibration, and smart energy meter firmware parameters requiring stable component supply across extended product lifecycles.

Supply support for AT93C46-10TU-2.7-T 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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification coverage.

The AT93C46-10TU-2.7-T belongs to Microchip's legacy serial EEPROM product line, designed specifically for space-constrained, low-power embedded systems requiring simple, robust, and long-life nonvolatile storage without complex protocol stacks.

FAQ

What is the memory organization flexibility of the AT93C46-10TU-2.7-T?

The AT93C46-10TU-2.7-T supports user-selectable 128 × 8 (byte mode) or 64 × 16 (word mode) organization via the ORG pin: tied to VCC for x16, grounded for x8. If left unconnected, the internal ~1 MΩ pull-up typically selects x16 mode-though AT93C46A-10TU-2.7-T is recommended for guaranteed behavior. This dual-mode capability allows one AT93C46-10TU-2.7-T footprint to serve both 8-bit and 16-bit MCU architectures.

Does the AT93C46-10TU-2.7-T require an external erase command before writing?

No, the AT93C46-10TU-2.7-T does not require a separate erase command before writing. Each WRITE instruction automatically erases the target location prior to programming, and the entire write cycle-including erase-is self-timed and completes within 10 ms maximum. The device remains in Erase/Write Disable (EWDS) state after power-on until an explicit EWEN instruction is issued, preventing accidental writes.

What package type and dimensions does the AT93C46-10TU-2.7-T use?

The AT93C46-10TU-2.7-T uses an 8-lead TSSOP (Thin Shrink Small Outline Package) with 3.0 mm × 4.4 mm body size, 0.65 mm lead pitch, and gull-wing terminations. Its height is ≤1.20 mm, and it complies with JEDEC MO-153, Variation AA. This compact, surface-mount package enables high-density PCB layouts while maintaining hand-solderability and standard reflow compatibility.

How does the AT93C46-10TU-2.7-T indicate write completion status?

The AT93C46-10TU-2.7-T outputs Ready/Busy status on the DO pin: after initiating a WRITE or ERASE instruction, if CS is brought high for ≥250 ns (tCS), DO asserts logic '0' during active programming/erasing and transitions to logic '1' upon completion. This allows host firmware to poll status without fixed delays-critical for deterministic real-time response in safety-critical applications using AT93C46-10TU-2.7-T.

Is the AT93C46-10TU-2.7-T suitable for automotive applications?

Yes, the AT93C46-10TU-2.7-T is explicitly qualified for automotive-grade operation per its ordering code suffix (-TU denotes TSSOP, -2.7 specifies 2.7V–5.5V range, and "Automotive Grade, Extended Temperature and Lead-Free/Halogen-Free Devices Available" is confirmed in the datasheet). It operates reliably from −40°C to +85°C, meets AEC-Q100 stress test requirements, and supports long-term data retention essential for vehicle subsystems using AT93C46-10TU-2.7-T.