My Inquiry
My Account
Microchip Technology 93AA66C/W15K
- Part No.:
- 93AA66C/W15K
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- Die
- Datasheet:
-
93AA66C/W15K.pdf
- Description:
- IC EEPROM 4KBIT MICROWIRE DIE
- Quantity:
- Payment:
- Shipping:
Inventory:3,867
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93AA66C/W15K from Microchip Technology Inc. is a 4 Kbit low-voltage serial EEPROM with configurable 8-/16-bit word organization via the ORG pin, 1.8–5.5 V supply range, industrial temperature rating (−40°C to +85°C), and Microwire-compatible 3-wire serial interface. It delivers 1 million erase/write cycles and >200 years data retention for nonvolatile parameter storage in embedded control systems.
For engineers reviewing the 93AA66C/W15K datasheet, 93AA66C/W15K pinout, 93AA66C/W15K application, or 93AA66C/W15K equivalent, key selection criteria include ORG-pin-configurable memory width, self-timed erase/write with ERAL/WRAL support, Ready/Busy status signaling via DO, and compatibility with low-power microcontroller peripherals requiring Microwire protocol compliance.
Technical Context
The 93AA66C/W15K implements a synchronous 3-wire Microwire interface with CS, CLK, and DI/DO pins, where instruction execution begins on detection of a Start bit (CS high and DI high on CLK rising edge). Memory organization is dynamically selected: ORG = VSS enables 512 × 8-bit mode; ORG = VCC enables 256 × 16-bit mode.
It features hardware-level data protection including power-on/off voltage monitoring (VPOR = 1.5 V), EWEN/EWDS command-based write enable/disable, and automatic ERAL before WRAL. All programming cycles are self-timed, with TWC = 6 ms for erase/write and TEC = 6 ms for ERAL at VCC ≥ 4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4 Kbit (512 × 8-bit or 256 × 16-bit, selectable via ORG pin) |
| VCC range | 1.8 V to 5.5 V - supports single-supply operation across battery-powered and 3.3/5 V logic systems |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in frequent configuration updates |
| Data retention | >200 years at 25°C - guarantees nonvolatile storage integrity over product lifetime |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, no SPI mode bits required |
| Timing (max FCLK) | 3 MHz at VCC ≥ 4.5 V - enables fast parameter reads/writes without external timing constraints |
| Temperature range | Industrial: −40°C to +85°C - qualified for use in automotive ECUs, industrial controllers, and networking equipment |
Pinout & Package
93AA66C/W15K is packaged in an 8-lead SOIC (SOIC-8, package code SN), with Pb-free Matte Tin finish. Pin 1 is CS; pin 2 is CLK; pin 3 is DI; pin 4 is DO; pin 5 is VSS; pin 6 is ORG; pin 7 is NC; pin 8 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable: device enters active mode only when CS = high; falling edge initiates self-timed erase/write |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data and clocks out read data/status |
| DI | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; must be stable before CS activation |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS = low or during standby |
| VSS | Ground | Reference return path for all I/O and internal circuitry; must be low-impedance connection |
| ORG | Organization select | Logic level determines memory width: VSS → 512 × 8-bit; VCC → 256 × 16-bit; must be externally biased |
| NC | No internal connection | Pin 7 has no internal bond; may be left unconnected or tied to ground for mechanical stability |
| VCC | Power supply | Provides core and I/O voltage; includes internal POR circuit triggering at 1.5 V for data protection |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin-configurable word size | Enables single BOM part to serve both 8-bit and 16-bit host MCU interfaces without redesign |
| Self-timed erase/write with auto-erase | Eliminates need for external timing control or polling delays beyond Ready/Busy status check |
| ERAL before WRAL | Ensures full array erasure prior to bulk write, preventing stale data corruption in firmware parameter tables |
| Ready/Busy status on DO | Allows real-time progress monitoring during programming without dedicated status register or interrupt line |
| EWEN/EWDS command protection | Prevents accidental writes during noise events or brown-out by requiring explicit enable before each programming sequence |
Applications
| Industrial Sensor Calibration | Automotive ECU Configuration |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and runtime calibration updates in pressure or temperature transducers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and high data integrity requirements. Use Value: 1M endurance and >200-year retention ensure calibration data survives full product lifecycle without refresh. | Use Scenario: Holding vehicle-specific configuration flags (e.g., transmission type, axle ratio, lighting options) in body control modules. IC Role / Device Role / Timing Role: Microwire-compatible EEPROM interfaced to 8-bit automotive MCUs for boot-time configuration loading. Use Value: ORG-pin flexibility allows same 93AA66C/W15K to support both legacy 8-bit and newer 16-bit MCU platforms. |
| Medical Device Settings Storage | Networking Equipment MAC Address Backup |
Use Scenario: Retaining user-adjustable therapy parameters and audit logs in portable infusion pumps or diagnostic monitors. IC Role / Device Role / Timing Role: Low-power serial EEPROM accessed during system startup and after user input events. Use Value: 1.8 V minimum VCC enables direct connection to Li-ion battery rails without regulation, reducing BoM cost. | Use Scenario: Backing up unique Ethernet MAC address and firmware version ID in switches/routers during power loss. IC Role / Device Role / Timing Role: Fail-safe nonvolatile storage accessed only at boot or after firmware update. Use Value: ERAL/WRAL commands allow atomic full-memory reprogramming, preventing partial-write corruption during unexpected shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC66C/SN | VCC range 2.5–5.5 V; identical pinout, ORG function, and instruction set | Not suitable for 1.8 V systems; requires ≥2.5 V for reliable operation | Select when system VCC is guaranteed ≥2.5 V and higher immunity to VCC noise is needed |
| 93AA66A/SN | Fixed 8-bit organization (no ORG pin); otherwise identical electrical specs and package | Lacks configurability - cannot support 16-bit hosts without external glue logic | Choose when design uses only 8-bit microcontrollers and board space permits fixed-function simplification |
Compared with 93LC66C/SN and 93AA66A/SN, the 93AA66C/W15K uniquely supports 1.8 V operation and ORG-selectable word width - critical for mixed-signal systems needing both low-voltage compatibility and MCU interface flexibility.
Availability
93AA66C/W15K is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive ECU configuration, and medical device settings storage requiring stable component supply across extended product lifecycles.
Supply support for 93AA66C/W15K 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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX66 family was designed specifically for cost-sensitive, low-power embedded systems requiring reliable, pin-efficient serial nonvolatile memory with robust data protection and wide supply voltage tolerance.
FAQ
What is the function of the ORG pin on the 93AA66C/W15K?
The ORG pin on the 93AA66C/W15K selects memory organization: when tied to VSS, it configures the device as 512 × 8-bit; when tied to VCC, it configures as 256 × 16-bit. This pin must be externally biased to a valid logic level before any operation; floating is not permitted. The 93AA66C/W15K requires this pin to be connected - unlike A/B variants which omit it entirely.
Does the 93AA66C/W15K support sequential read mode?
Yes, the 93AA66C/W15K supports sequential read: when CS remains high after a READ instruction, the internal address counter automatically increments, and subsequent clock cycles output data from consecutive memory locations. This eliminates the need to retransmit the opcode and address for each byte/word, improving throughput in parameter table access.
What is the minimum VCC required for reliable operation of the 93AA66C/W15K?
The 93AA66C/W15K operates reliably down to 1.8 V, as specified in its DC characteristics table. Below this threshold, the internal power-on reset (POR) circuit disables all operations to prevent data corruption. At VCC = 1.8 V, maximum clock frequency is 1 MHz, and read/write currents scale accordingly per the datasheet's ICC tables.
How does the Ready/Busy status work on the 93AA66C/W15K DO pin?
During erase or write operations, the DO pin outputs Ready/Busy status: logic low indicates programming is in progress; logic high indicates completion. To sample this, CS must be brought high for ≥250 ns after the initial CS low pulse, then monitored on subsequent CLK edges. Issuing a new Start bit clears the status flag, allowing immediate re-check.
Can the 93AA66C/W15K be used in automotive applications requiring AEC-Q100 qualification?
No - the 93AA66C/W15K is rated for Industrial temperature range (−40°C to +85°C) only and is not AEC-Q100 qualified. For automotive applications, Microchip offers the 93LC66C/E variant (with 'E' suffix), which extends to −40°C to +125°C and undergoes additional stress testing. The 93AA66C/W15K is intended for industrial, medical, and consumer systems meeting I-temp requirements.
93AA66C/W15K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 4Kbit
- Memory Organization:
- 512 x 8, 256 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
93AA66C/W15K FAQ
1.How can I place an order for 93AA66C/W15K through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA66C/W15K 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 93AA66C/W15K reliable?
The price and inventory of 93AA66C/W15K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA66C/W15K is usually 5 days.
3.What payment methods are accepted for 93AA66C/W15K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA66C/W15K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA66C/W15K?
93AA66C/W15K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA66C/W15K 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 93AA66C/W15K?
For technical support, including 93AA66C/W15K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA66C/W15K requirements.
6.How does Aetrix verify that 93AA66C/W15K is sourced from the original manufacturer or authorized distributors?
All 93AA66C/W15K 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 93AA66C/W15K meets industry standards.
7.What is the process for return or replacement of 93AA66C/W15K?
All 93AA66C/W15K units undergo pre-shipment inspection (PSI). If there is an issue with 93AA66C/W15K, 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 93AA66C/W15K part is unused and in its original packaging.
Return procedure for 93AA66C/W15K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA66C/W15K 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…
