Microchip Technology AT93C46Y1-10YU-1.8-T

Overview

AT93C46Y1-10YU-1.8-T from Microchip Technology (formerly Atmel) is a 1-kilobit, three-wire serial EEPROM with user-selectable 128 × 8 or 64 × 16 organization, 1.8V to 5.5V supply operation, and automotive-grade temperature range (−40°C to +85°C). It features self-timed write cycles (≤10 ms), 1 million write endurance, and 100-year data retention - deployed in microcontroller configuration storage, sensor calibration memory, and industrial control parameter backup.

For engineers reviewing the AT93C46Y1-10YU-1.8-T datasheet, AT93C46Y1-10YU-1.8-T pinout, AT93C46Y1-10YU-1.8-T application, or AT93C46Y1-10YU-1.8-T equivalent, key selection considerations include VCC min/max compatibility (1.8–5.5 V), ORG pin configuration for x8/x16 mode, standby current at 1.8 V (≤0.1 µA), and dBGA2™ package footprint constraints.

Technical Context

The AT93C46Y1-10YU-1.8-T implements a synchronous three-wire serial interface (CS, SK, DI/DO) with start-bit–driven instruction decoding and no external clock dependency beyond SK. Its internal architecture supports dual memory organizations selected via the ORG pin - tied to VCC for 64-word × 16-bit or grounded for 128-word × 8-bit - and includes an Erase/Write Enable (EWEN) state machine that gates all programming operations until explicitly enabled.

Timing compliance is voltage-tiered: AC parameters like fSK (max 2 MHz at 5 V, 1 MHz at 2.7 V, 0.25 MHz at 1.8 V) and tSKH/tSKL (250 ns min at ≥2.7 V, 1000 ns at 1.8 V) are specified per VCC range. The device outputs Ready/Busy status on DO during write/erase when CS is asserted high after tCS ≥250 ns, enabling host polling without fixed delays.

Key Specifications

Pinout & Package

AT93C46Y1-10YU-1.8-T uses an 8-ball dBGA2™ package (1.5 mm × 2.0 mm, 0.5 mm pitch), optimized for space-constrained PCB layouts. Pin mapping follows JEDEC-standard ball grid orientation with Pin 1 at top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95128-WMN6TP and BR24G01FJ-WE2, the AT93C46Y1-10YU-1.8-T uniquely offers hardware-selectable memory width and minimal 3-wire GPIO footprint - making it optimal for resource-constrained 8-bit MCU designs requiring precise 1 Kb allocation and voltage scalability down to 1.8 V.

Availability

AT93C46Y1-10YU-1.8-T is available at Aetrix Electronics and suitable for industrial sensor calibration, microcontroller configuration storage, and automotive body control module applications requiring stable component supply and long-term lifecycle support.

Supply support for AT93C46Y1-10YU-1.8-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 memory solutions, with a focus on embedded control and connectivity.

The AT93C46Y1-10YU-1.8-T belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count applications demanding reliable nonvolatile storage in harsh environments.

FAQ

What is the function of the ORG pin on the AT93C46Y1-10YU-1.8-T?

The ORG pin on the AT93C46Y1-10YU-1.8-T selects memory organization: tied to VCC enables 64 × 16-bit mode, grounded enables 128 × 8-bit mode. Per the datasheet, this feature is not available on 1.8 V devices - meaning the AT93C46Y1-10YU-1.8-T defaults to one fixed organization (128 × 8) regardless of ORG state. This behavior is explicitly documented in the "Note" under Figure 1 block diagram.

Does the AT93C46Y1-10YU-1.8-T support true 1.8 V operation across all specifications?

Yes, the AT93C46Y1-10YU-1.8-T is fully characterized for 1.8 V to 5.5 V operation, including DC parameters (e.g., ISB1 ≤ 0.1 µA standby current at 1.8 V) and AC timing (e.g., fSK min = 0.25 MHz, tSKH/tSKL max = 1000 ns). All electrical specs in Tables 3 and 4 apply across the full 1.8–5.5 V range, confirming true low-voltage functionality - not just partial compatibility.

Can the AT93C46Y1-10YU-1.8-T be used in automotive applications?

Yes, the AT93C46Y1-10YU-1.8-T is qualified for automotive-grade temperature operation (−40°C to +85°C) and offered in lead-free/halogen-free packaging per ordering code suffixes. Its 1 million write endurance and 100-year data retention meet AEC-Q100 reliability expectations for body electronics, though formal AEC-Q100 certification documentation must be obtained separately from Microchip for qualification-critical deployments.

What package type does the AT93C46Y1-10YU-1.8-T use, and what are its key mechanical dimensions?

The AT93C46Y1-10YU-1.8-T uses the 8-ball dBGA2™ package (ordering code suffix "YU"), measuring 1.50 mm × 2.00 mm with 0.50 mm ball pitch. Per Drawing PO8U3-1 A, ball diameter is 0.20–0.30 mm, overall height is 0.71–0.91 mm, and Pin 1 is located at the top-left corner - confirmed in the Packaging Information section (page 18) of the datasheet.

How does the AT93C46Y1-10YU-1.8-T handle write protection and data security?

The AT93C46Y1-10YU-1.8-T implements instruction-based write protection: programming (WRITE, ERASE, WRAL, ERAL) is disabled by default at power-on and requires explicit EWEN instruction before execution. Write disable (EWDS) restores protection. No hardware write-protect pin or password security is provided - data integrity relies entirely on controlled software sequencing and proper CS/SK timing per Table 5 instruction set.