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Microchip Technology 93AA56X/SN
- Part No.:
- 93AA56X/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA56X/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,441
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Product details
Overview
The 93AA56X/SN from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, and industrial temperature rating (−40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL/WRAL support, and Ready/Busy status signaling via DO pin. Used in embedded system configuration storage where space-constrained, low-power nonvolatile memory is required.
For engineers reviewing the 93AA56X/SN datasheet, 93AA56X/SN pinout, 93AA56X/SN application, or 93AA56X/SN equivalent, key selection considerations include its fixed 8-bit organization (no ORG pin), SOIC-8 (SN) package compatibility, 1 million erase/write endurance, 200-year data retention, and Microwire protocol timing compliance across 1.8–5.5 V operation.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals - no ORG pin present, confirming fixed x8 organization. Internal logic includes power-on/off data protection, automatic erase-before-write, and hardware-level EWEN/EWDS write-enable control to prevent accidental programming.
It operates across 1.8–5.5 V with guaranteed AC timing up to 3 MHz at VCC ≥ 4.5 V, and supports sequential read, individual erase/write, ERAL (Erase All), and WRAL (Write All) instructions - all initiated by CS falling edge for 93AA variants, with DO providing real-time Ready/Busy polling during active cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit); fixed x8 organization - no ORG pin, simplifies PCB routing and firmware address handling |
| VCC range | 1.8 V to 5.5 V; enables direct integration with 1.8 V, 3.3 V, and 5 V microcontrollers without level-shifting |
| Endurance | 1,000,000 erase/write cycles; supports frequent calibration or logging updates in field-deployed devices |
| Data retention | >200 years at 25°C; ensures long-term reliability for unattended or maintenance-free applications |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO); minimal GPIO usage, compatible with legacy PIC® and 8051 platforms |
| Timing (max FCLK) | 3 MHz at VCC ≥ 4.5 V; enables fast configuration loading during boot without CPU wait-state overhead |
| Operating temp | −40°C to +85°C (Industrial grade); validated for use in automotive body control modules and industrial HMIs |
Pinout & Package
Package: 8-lead SOIC (SN), Pb-free Matte Tin finish, standard footprint compatible with JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into standby (ICC ≤ 5 µA) |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any point - supports flexible MCU clock management |
| DI | Data Input | Receives Start bit, opcodes, addresses, and write data; high-impedance when not selected |
| DO | Data Output / Status | Outputs read data or Ready/Busy signal (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal logic; requires low-impedance connection to minimize noise coupling |
| NC | No Connect | Pin 7 in SOIC-8; internally unconnected - must be left floating or tied to VSS per layout best practice |
| VCC | Power Supply | 1.8–5.5 V input; includes internal POR circuit triggering at ~1.5 V to block writes during brown-out |
| ORG | Organization select | Not present on 93AA56X/SN - this is an 'A' variant; fixed 8-bit mode eliminates external logic dependency |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - MCU can poll DO for completion instead of fixed delays |
| Automatic ERAL before WRAL | Ensures full array readiness before bulk write; removes requirement for separate erase command in firmware |
| Power-on/off data protection | Hardware-enforced write inhibition below 1.5 V VCC - prevents corruption during power ramp-up/down |
| EWEN/EWDS security | Explicit enable/disable sequence required before any write - blocks spurious writes from noise or reset glitches |
| Sequential read mode | Enables continuous read across multiple addresses with single CS assertion - reduces transaction overhead by ~40% |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and user-adjusted thresholds in HVAC or pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-up and periodic recalibration routines. Use Value: 200-year retention ensures calibration integrity over product lifetime; 1M endurance supports field recalibration every 3 months for 27+ years. | Use Scenario: Saving user preferences (temperature setpoints, cycle modes, language) in washing machines and microwaves. IC Role / Device Role / Timing Role: Low-pin-count serial EEPROM interfaced directly to 8-bit MCU with limited GPIO resources. Use Value: SOIC-8 (SN) package fits compact control boards; 1.8 V operation allows direct connection to battery-backed RTC domains. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Storing door lock/unlock history, mirror position presets, and lighting profiles in BCMs. IC Role / Device Role / Timing Role: Microwire EEPROM used for infrequent but critical parameter storage with fail-safe write verification. Use Value: −40°C to +85°C rating meets AEC-Q100 Grade 3 requirements; Ready/Busy polling avoids timeout-based firmware delays. | Use Scenario: Retaining calibration constants, usage counters, and regulatory audit logs in portable ultrasound or glucose meters. IC Role / Device Role / Timing Role: Secure configuration store with hardware write-protection (EWEN/EWDS) preventing unauthorized parameter changes. Use Value: 1.8 V minimum VCC enables operation from single-cell Li-ion; RoHS/Pb-free compliance satisfies IEC 62304 medical device requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56A/SN | VCC range 2.5–5.5 V; otherwise identical pinout, instruction set, and x8 organization | Not suitable for 1.8 V systems; requires minimum 2.5 V - excludes ultra-low-power or battery-only designs | Select if operating exclusively at 3.3 V or 5 V and higher immunity to VCC undershoot is needed |
| AT25020B-SSHL-T | SPI interface (4-wire), 2 Kbit x8, 1.8–5.5 V, 20 MHz max clock; no Ready/Busy pin - relies on WIP flag polling | Requires additional chip-select line and SPI peripheral; lacks dedicated status pin - increases firmware complexity | Choose when migrating to SPI-based platforms or needing faster 20 MHz access; verify WIP polling robustness in safety-critical contexts |
Compared with 93LC56A/SN, the 93AA56X/SN extends low-voltage operation to 1.8 V while retaining identical SOIC-8 footprint and Microwire timing - critical for energy-harvesting or coin-cell-powered systems. Versus AT25020B, it trades SPI speed for simpler 3-wire wiring and hardware-ready status signaling, reducing MCU resource load in cost-sensitive designs.
Availability
93AA56X/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, and automotive body control modules requiring stable component supply across extended production lifecycles.
Supply support for 93AA56X/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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93AA56X/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, space-constrained embedded systems requiring reliable, low-power nonvolatile storage with minimal external components.
FAQ
What is the memory organization of the 93AA56X/SN?
The 93AA56X/SN is a fixed 256 × 8-bit (2 Kbit) organization device with no ORG pin - unlike 'C' variants, it does not support x16 mode. This simplifies design by eliminating external ORG logic and guarantees consistent 8-bit data framing in all applications using the 93AA56X/SN.
Does the 93AA56X/SN support 1.8 V operation?
Yes, the 93AA56X/SN supports full functionality across 1.8 V to 5.5 V, including guaranteed AC timing (up to 2 MHz at 1.8 V) and DC parametric compliance. Its 1.5 V power-on reset threshold ensures write protection during brown-out conditions common in 1.8 V battery-powered systems.
How is write protection implemented on the 93AA56X/SN?
The 93AA56X/SN uses dual-layer write protection: hardware-level VCC monitoring (blocks writes below ~1.5 V) and software-controlled EWEN/EWDS commands. The device powers up in EWDS (Erase/Write Disable) state; an explicit EWEN instruction is required before any ERASE or WRITE operation - preventing accidental writes from noise or reset events.
What package type does the 93AA56X/SN use?
The 93AA56X/SN uses an 8-lead SOIC package (suffix 'SN'), with standard JEDEC MS-012 dimensions (3.9 mm width, 4.9 mm length), Pb-free Matte Tin finish, and pin 1 marked by laser indentation. It is footprint-compatible with PDIP-8 and TSSOP-8 for layout flexibility.
Can the 93AA56X/SN be used in automotive applications?
The 93AA56X/SN is rated for Industrial temperature range (−40°C to +85°C), making it suitable for under-hood automotive applications with thermal derating or cabin-mounted modules like infotainment and lighting controls. For under-hood engine control units requiring AEC-Q100 Grade 1 (−40°C to +125°C), the 93LC56B-E/SN or 93C56B-E/SN variants are recommended instead of the 93AA56X/SN.
93AA56X/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93AA56X/SN FAQ
1.How can I place an order for 93AA56X/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56X/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 93AA56X/SN reliable?
The price and inventory of 93AA56X/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA56X/SN is usually 5 days.
3.What payment methods are accepted for 93AA56X/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56X/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56X/SN?
93AA56X/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56X/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 93AA56X/SN?
For technical support, including 93AA56X/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56X/SN requirements.
6.How does Aetrix verify that 93AA56X/SN is sourced from the original manufacturer or authorized distributors?
All 93AA56X/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 93AA56X/SN meets industry standards.
7.What is the process for return or replacement of 93AA56X/SN?
All 93AA56X/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56X/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 93AA56X/SN part is unused and in its original packaging.
Return procedure for 93AA56X/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA56X/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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