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Microchip Technology 93AA56CXT-I/SN
- Part No.:
- 93AA56CXT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA56CXT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,014
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Product details
Overview
93AA56CXT-I/SN from Microchip Technology Inc. is a 2 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 supports self-timed erase/write cycles, automatic ERAL/WRAL, and Ready/Busy status polling - used in microcontroller firmware storage, sensor calibration data retention, and power-management configuration memory.
For engineers reviewing the 93AA56CXT-I/SN datasheet, 93AA56CXT-I/SN pinout, 93AA56CXT-I/SN application, or 93AA56CXT-I/SN equivalent, key selection considerations include ORG-pin-configurable word size, 1 million erase/write endurance, 200-year data retention, low standby current (1 µA), and compatibility with 3-wire serial host controllers in space-constrained embedded systems.
Technical Context
The 93AA56CXT-I/SN implements a synchronous Microwire-compatible serial interface with CS, CLK, DI, and DO signals, where instruction execution begins on detection of a Start condition (CS high + DI high at CLK rising edge). Memory organization is dynamically selected: ORG = VSS enables 256 × 8-bit mode; ORG = VCC enables 128 × 16-bit mode.
It features hardware-level power-on/off data protection, automatic erase-before-write, and dual-mode programming control (EWEN/EWDS) to prevent accidental writes. The DO pin serves dual function: serial data output during READ and Ready/Busy status indicator during ERASE/WRITE - requiring CS reassertion after TCSL ≥ 250 ns to sample status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit or 128 × 16-bit, selectable via ORG pin) |
| Supply Voltage | 1.8–5.5 V - supports direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level shifters |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable systems |
| Data Retention | >200 years at +85°C - guarantees nonvolatile storage integrity over product lifetime |
| Interface | 3-wire Microwire-compatible serial (CS, CLK, DI/DO) - minimal GPIO usage, no SPI mode bits required |
| Write Cycle Time | 6 ms typical (TWC) - deterministic timing for system-level timeout handling in firmware |
| Standby Current | 1 µA at TA = –40°C to +85°C - enables ultra-low-power operation in battery-backed applications |
Pinout & Package
93AA56CXT-I/SN is packaged in an 8-lead SOIC (SN) with Pb-free Matte Tin finish, 3.9 mm × 4.9 mm body, and standard 1.27 mm pitch. Pin 1 is marked by laser dot; package conforms to JEDEC MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into Standby mode |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; shares signal path with DO in bidirectional configurations |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS is low or during WRAL/ERAL |
| VSS | Ground | Reference for all I/O and internal circuitry; must be connected before VCC during power-up |
| ORG | Organization Control | Logic-high → 128 × 16-bit mode; logic-low → 256 × 8-bit mode; must be externally biased, not floating |
| NC | No Internal Connection | Pin 7 is unconnected internally; may be left open or tied to ground for mechanical stability |
| VCC | Power Supply | 1.8–5.5 V input; includes internal voltage detect (VPOR = 1.5 V) for power-on data protection |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin word-size selection | Enables single BOM support for both 8-bit and 16-bit host interfaces without redesigning PCB layout |
| Auto-erase before write | Eliminates need for separate ERASE command prior to WRITE, simplifying firmware driver logic |
| ERAL and WRAL commands | Full-array erase (ERAL) and full-array write (WRAL) reduce host CPU overhead and communication latency |
| Ready/Busy polling via DO | Allows asynchronous operation without fixed delays - host reads DO while CS high to determine completion |
| EWEN/EWDS write protection | Hardware-enforced write disable on power-up prevents corruption during brown-out or reset sequences |
Applications
| Microcontroller Configuration Storage | Sensor Calibration Data Retention |
|---|---|
Use Scenario: Storing bootloader parameters, network MAC address, and factory-set trim values in an industrial PLC controller. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during MCU boot sequence and runtime updates. Use Value: Ensures deterministic startup behavior and field-upgradable settings without external FRAM or flash. | Use Scenario: Holding temperature-compensation coefficients and offset/gain calibration constants for a MEMS pressure sensor module. IC Role / Device Role / Timing Role: Low-power, infrequently written memory accessed only during sensor initialization or recalibration. Use Value: Maintains accuracy across operating life with 200-year data retention and 1M-cycle endurance. |
| Power Management Unit (PMU) Settings | Consumer Appliance User Preference Memory |
Use Scenario: Saving dynamic voltage/frequency scaling (DVFS) tables and thermal throttling thresholds in a battery-powered IoT gateway. IC Role / Device Role / Timing Role: Serial EEPROM interfaced directly to PMU's dedicated I/O pins for real-time configuration access. Use Value: Enables adaptive power optimization without MCU intervention; 1 µA standby current minimizes quiescent drain. | Use Scenario: Preserving user-selected display brightness, language, and timer presets in a smart microwave oven. IC Role / Device Role / Timing Role: Persistent memory updated only on menu navigation or button press - low write frequency, high reliability demand. Use Value: Survives repeated power cycling and meets consumer appliance lifetime requirements with >200-year data retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56CXT-I/SN | Same pinout and interface, but requires 2.5–5.5 V supply - lacks 1.8 V operation capability | Not suitable for 1.8 V systems; otherwise identical functionality and timing | Select if system VCC ≥2.5 V and legacy 93LC family qualification is required |
| AT25020B-MAHL-T | SPI interface (4-wire), 2.5–5.5 V, 2 Kbit, 1 MHz max clock - no ORG pin or Microwire compatibility | Requires different firmware driver and GPIO allocation; no Ready/Busy polling via DO | Choose only when migrating to SPI-based architecture or needing higher clock rates |
Compared with 93LC56CXT-I/SN and AT25020B-MAHL-T, the 93AA56CXT-I/SN uniquely supports 1.8 V operation and ORG-selectable word size - enabling flexible integration across mixed-voltage designs and reducing firmware branching for 8-/16-bit hosts.
Availability
93AA56CXT-I/SN is available at Aetrix Electronics and suitable for industrial control systems, sensor modules, and consumer appliance designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93AA56CXT-I/SN 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 93XX56 series was designed specifically for cost-sensitive, low-power embedded systems requiring reliable serial nonvolatile memory with minimal pin count and flexible word-width support.
FAQ
What is the function of the ORG pin on the 93AA56CXT-I/SN?
The ORG pin on the 93AA56CXT-I/SN selects memory organization: tied to VCC it configures the device as 128 × 16-bit; tied to VSS it configures as 256 × 8-bit. This allows one 93AA56CXT-I/SN part number to serve both 8-bit and 16-bit host interfaces. The pin must be externally biased - floating is not permitted - and its state is sampled at instruction start. Unlike A/B variants, the 93AA56CXT-I/SN requires this pin for operation.
Does the 93AA56CXT-I/SN support SPI communication?
No, the 93AA56CXT-I/SN does not support SPI. It implements a Microwire-compatible 3-wire serial interface (CS, CLK, DI/DO) with specific instruction opcodes and timing. While electrically similar to SPI Mode 0, it lacks MOSI/MISO separation and uses DO for both data output and Ready/Busy status. SPI peripherals cannot directly drive the 93AA56CXT-I/SN without protocol translation firmware.
How is write protection implemented on the 93AA56CXT-I/SN?
Write protection on the 93AA56CXT-I/SN is enforced through the EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) commands. The device powers up in EWDS mode, blocking all ERASE and WRITE operations until EWEN is issued. After any write, executing EWDS restores protection. This hardware lock prevents accidental overwrites during power transients or software faults - independent of VCC monitoring circuitry.
What is the maximum clock frequency supported by the 93AA56CXT-I/SN at 1.8 V?
At VCC = 1.8 V, the 93AA56CXT-I/SN supports a maximum clock frequency of 1 MHz, as specified in Table 1-2 (Param. A1, FCLK). This limit ensures reliable setup/hold timing (TDIS, TDIH ≥ 250 ns) and data output delay (TPD ≤ 400 ns) under worst-case voltage and temperature conditions. Operating above 1 MHz at 1.8 V violates AC specifications and may cause command misreads or data corruption.
Can the 93AA56CXT-I/SN be used in automotive applications?
The 93AA56CXT-I/SN is rated for Industrial temperature range (–40°C to +85°C), not Automotive (–40°C to +125°C). Its datasheet specifies no characterization or qualification for E-temp grade operation. For automotive use, Microchip recommends the 93LC56CXT-E/SN or 93C56CXT-E/SN variants, which are tested and guaranteed across –40°C to +125°C and meet AEC-Q100 stress requirements - the 93AA56CXT-I/SN is not qualified for under-hood or safety-critical vehicle systems.
93AA56CXT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8, 128 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93AA56CXT-I/SN FAQ
1.How can I place an order for 93AA56CXT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56CXT-I/SN 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 93AA56CXT-I/SN reliable?
The price and inventory of 93AA56CXT-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA56CXT-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA56CXT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56CXT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56CXT-I/SN?
93AA56CXT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56CXT-I/SN 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 93AA56CXT-I/SN?
For technical support, including 93AA56CXT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56CXT-I/SN requirements.
6.How does Aetrix verify that 93AA56CXT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA56CXT-I/SN 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 93AA56CXT-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA56CXT-I/SN?
All 93AA56CXT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56CXT-I/SN, 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 93AA56CXT-I/SN part is unused and in its original packaging.
Return procedure for 93AA56CXT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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