My Inquiry
My Account
Microchip Technology 93AA66AT-I/MNY
- Part No.:
- 93AA66AT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93AA66AT-I/MNY.pdf
- Description:
- IC EEPROM 4KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,191
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93AA66AT-I/MNY from Microchip Technology Inc. is a 4 Kbit low-voltage serial EEPROM with 512 × 8-bit organization, Microwire-compatible 3-wire interface (CS/CLK/DI/DO), and industrial temperature range (–40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and >200 years data retention - used in embedded system configuration storage, sensor calibration memory, and firmware parameter backup.
For engineers reviewing the 93AA66AT-I/MNY datasheet, 93AA66AT-I/MNY pinout, 93AA66AT-I/MNY application, or 93AA66AT-I/MNY equivalent, key selection criteria include VCC range (1.8–5.5 V), 8-bit x512 organization (no ORG pin), industrial-grade reliability, and compatibility with legacy Microwire controllers in space-constrained designs.
Technical Context
The 93AA66AT-I/MNY implements a synchronous serial interface with start-bit detection, opcode-driven command set (READ/WRITE/ERASE/ERAL/WRAL/EWEN/EWDS), and Ready/Busy status polling via DO pin. Its internal architecture includes address decoder, mode decode logic, and output buffer, all operating without external timing components.
It supports sequential read, auto-erase-before-write, and full-array operations (ERAL/WRAL) with fixed clock-cycle requirements: 20 CLK cycles for READ/WRITE in x8 mode, and TWC = 6 ms typical write cycle time at VCC ≥ 4.5 V. Power management includes standby current ≤5 µA and write current ≤2 mA at 2.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Kbit (512 × 8-bit organization; no ORG pin) |
| VCC range | 1.8 V to 5.5 V - enables direct interface with 1.8 V, 3.3 V, and 5 V microcontrollers |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - requires no I²C pull-ups or SPI mode configuration |
| Endurance | 1,000,000 erase/write cycles - supports frequent field updates in telemetry or logging applications |
| Data retention | >200 years at +25°C - ensures long-term calibration data integrity without refresh |
| Temp range | Industrial: –40°C to +85°C - qualified for industrial control, metering, and automotive body electronics |
| Write time | 6 ms typical (TWC) - deterministic programming latency for real-time parameter save sequences |
Pinout & Package
93AA66AT-I/MNY is packaged in an 8-lead MSOP (MS) - 3.0 mm × 3.0 mm, 0.65 mm pitch, exposed pad optional - compatible with automated SMT assembly and thermal relief requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby mode |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable mid-sequence |
| 3 (DI) | Data Input | Receives start bit, instruction opcodes, address bits, and write data; high-impedance when not selected |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| 5 (VSS) | Ground | Reference for all digital and analog circuitry; must be low-impedance connection |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice |
| 7 (VCC) | Power Supply | Supplies core and interface logic; bypass capacitor (0.1 µF) required near pin |
| 8 (ORG) | Organization select | Not present on 'A' devices - pin is NC; unused and must be left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or software delay loops during programming |
| Automatic ERAL before WRAL | Guarantees clean memory state before bulk write - prevents partial writes or data corruption |
| Power-on/off data protection | Hardware-level VCC monitor disables writes below 1.5 V - prevents inadvertent writes during brown-out |
| Ready/Busy status on DO | Enables non-blocking polling instead of fixed delays - improves system responsiveness and efficiency |
| 1,000,000 endurance cycles | Supports daily parameter updates for >2,700 years - suitable for lifetime field calibration storage |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed retention across power cycles and ambient temperature swings. Use Value: Eliminates need for external trimming potentiometers or host MCU flash wear leveling; maintains accuracy over 200+ years. | Use Scenario: Holding boot configuration flags, network MAC addresses, and user preferences in HVAC control panels. IC Role / Device Role / Timing Role: Serial configuration memory accessed during MCU initialization before main application starts. Use Value: Reduces BOM count vs. parallel EEPROM; supports fast 3-wire reads at up to 3 MHz for rapid boot sequencing. |
| Firmware Parameter Backup | Smart Meter Data Logging |
Use Scenario: Saving runtime-adjusted PID loop constants or safety thresholds in medical infusion pumps. IC Role / Device Role / Timing Role: Secure, low-power backup memory for critical operational parameters updated infrequently but requiring instant recall. Use Value: 1M endurance allows >1000 saves/day for 3 years; 1.8 V operation enables direct connection to low-voltage battery-backed domains. | Use Scenario: Recording tamper events, voltage sags, and billing intervals in electricity meters with 10+ year service life. IC Role / Device Role / Timing Role: Long-life data logger memory with immunity to power interruption during write cycles. Use Value: Hardware VCC lockout prevents corruption during brown-out; >200-year retention exceeds meter lifetime requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC66AT-I/MNY | VCC min = 2.5 V; same 512×8 organization, pinout, and instruction set | Not suitable for 1.8 V systems; higher VCC threshold reduces compatibility with ultra-low-power MCUs | Select only if system VCC is guaranteed ≥2.5 V and 1.8 V operation is unnecessary |
| AT25040B-MAU-1.8 | SPI interface (4-wire), 512×8, 1.8 V min, 20 MHz max clock; different command protocol | Requires SPI controller instead of Microwire; no native ERAL/WRAL - bulk operations require host software loops | Choose when migrating to SPI-based platforms or needing faster clock rates; rework required for interface and firmware |
Compared with 93LC66AT-I/MNY and AT25040B-MAU-1.8, the 93AA66AT-I/MNY uniquely supports true 1.8 V operation with hardware-accelerated ERAL/WRAL and Microwire compatibility - making it optimal for legacy or resource-constrained 3-wire designs where voltage headroom and deterministic bulk operations are critical.
Availability
93AA66AT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and firmware parameter backup requiring stable component supply across extended product lifecycles.
Supply support for 93AA66AT-I/MNY 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona.
The 93AA66AT-I/MNY belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power, nonvolatile memory applications in industrial and consumer electronics where Microwire interface compatibility and long-term data integrity are essential.
FAQ
What is the memory organization of the 93AA66AT-I/MNY?
The 93AA66AT-I/MNY has a fixed 512 × 8-bit organization. Unlike 'C' variants, it lacks an ORG pin and therefore does not support x16 mode. This simplifies design by eliminating external logic for word-size selection and ensures consistent 8-bit data framing in all applications using the 93AA66AT-I/MNY.
Does the 93AA66AT-I/MNY require an external pull-up resistor on the DO pin?
No, the 93AA66AT-I/MNY does not require an external pull-up on DO. The DO pin actively drives high/low during read or status polling and enters High-Z when deselected or idle. Pull-ups may cause bus contention if DI and DO are shorted; a series resistor is recommended only in shared-bus configurations per Section 2.2 of the 93AA66AT-I/MNY datasheet.
What is the minimum VCC required for reliable operation of the 93AA66AT-I/MNY?
The 93AA66AT-I/MNY operates reliably down to 1.8 V DC. Its power-on reset circuit disables write operations below 1.5 V (typical), preventing corruption during brown-out. This 1.8 V minimum enables direct interfacing with modern ultra-low-power MCUs and battery-backed subsystems without level-shifting - a key capability of the 93AA66AT-I/MNY.
How does the 93AA66AT-I/MNY handle power loss during a write cycle?
The 93AA66AT-I/MNY incorporates hardware VCC monitoring that automatically inhibits erase/write when VCC drops below ~1.5 V. If power fails mid-cycle, the device aborts the operation and retains pre-write data. No data corruption occurs, and the 93AA66AT-I/MNY resumes normal operation after stable VCC is restored - ensuring robustness in unstable power environments.
Is the 93AA66AT-I/MNY pin-compatible with other 93XX66 devices in MSOP packages?
Yes, the 93AA66AT-I/MNY shares identical 8-lead MSOP pinout and footprint with all 93XX66A/B/C variants in the MS package (e.g., 93LC66AT-I/MNY, 93C66AT-I/MNY). However, functional differences exist: 'A' devices lack ORG, 'B' devices are x16-only, and 'C' devices require ORG control - so firmware and schematic must match the specific variant, even when physical layout is identical for the 93AA66AT-I/MNY.
93AA66AT-I/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
93AA66AT-I/MNY FAQ
1.How can I place an order for 93AA66AT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA66AT-I/MNY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 93AA66AT-I/MNY reliable?
The price and inventory of 93AA66AT-I/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA66AT-I/MNY is usually 5 days.
3.What payment methods are accepted for 93AA66AT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA66AT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA66AT-I/MNY?
93AA66AT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA66AT-I/MNY order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 93AA66AT-I/MNY?
For technical support, including 93AA66AT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA66AT-I/MNY requirements.
6.How does Aetrix verify that 93AA66AT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 93AA66AT-I/MNY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 93AA66AT-I/MNY meets industry standards.
7.What is the process for return or replacement of 93AA66AT-I/MNY?
All 93AA66AT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93AA66AT-I/MNY, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 93AA66AT-I/MNY part is unused and in its original packaging.
Return procedure for 93AA66AT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA66AT-I/MNY Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
