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Microchip Technology 93AA56AT-I/MNY
- Part No.:
- 93AA56AT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93AA56AT-I/MNY.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,455
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Product details
Overview
93AA56AT-I/MNY 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 before WRAL, power-on/off data protection, and 1,000,000 endurance cycles - used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.
For engineers reviewing the 93AA56AT-I/MNY datasheet, 93AA56AT-I/MNY pinout, 93AA56AT-I/MNY application, or 93AA56AT-I/MNY equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), TSSOP-8 package, 3-wire serial protocol compatibility, and support for sequential read and Ready/Busy status polling via DO pin.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, and DI/DO signals. It uses internal auto-erase-before-write logic and supports full-array ERAL and WRAL commands with built-in write enable/disable (EWEN/EWDS) control. The absence of an ORG pin confirms fixed 8-bit word width and eliminates external configuration logic.
Operation relies on edge-triggered clocking (data latched on rising CLK), high-impedance DO during standby, and active-low CS-driven state transitions. Power-on reset circuitry holds writes disabled until explicit EWEN, and VCC brown-out detection (VPOR ≈ 1.5 V) prevents corruption below operational voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) - provides compact nonvolatile storage for boot parameters or device IDs without external address decoding. |
| VCC range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifters. |
| Clock frequency | Up to 3 MHz at VCC ≥ 4.5 V - supports fast programming in host-constrained timing environments. |
| Endurance | 1,000,000 erase/write cycles - ensures reliable field updates over product lifetime in telemetry or calibration applications. |
| Data retention | 200 years at 25°C - guarantees long-term integrity of stored calibration coefficients or security keys. |
| Write cycle time | 6 ms typical (TWC) - defines minimum inter-write interval; impacts real-time logging latency. |
| Standby current | 1 µA max (ICCS, I-temp) - minimizes battery drain in always-on IoT edge nodes. |
Pinout & Package
93AA56AT-I/MNY is packaged in an 8-pin TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, Pb-free Matte Tin finish, and industrial-grade thermal performance (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; controls entry into Standby mode when deasserted. |
| 2 CLK | Serial Clock | Rising-edge synchronized timing for opcode/address/data; stoppable mid-transfer without corruption. |
| 3 DI | Data Input | Accepts Start bit, instruction opcodes, addresses, and write data; requires no pull-up if driven actively. |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS low or during write cycles. |
| 5 VSS | Ground | Reference return path for all digital and analog functions; must be low-impedance for noise immunity. |
| 6 NC | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice - no functional role. |
| 7 ORG | Organization Select | Not present on 'A' version - pin is NC; confirms fixed 8-bit word width and eliminates external configuration logic. |
| 8 VCC | Power Supply | 1.8–5.5 V input; includes internal POR circuit (VPOR ≈ 1.5 V) that blocks writes until stable. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates need for external timing control or software delay loops - simplifies driver implementation. |
| Automatic ERAL before WRAL | Guarantees clean memory array prior to bulk write - prevents partial-data corruption during firmware update sequences. |
| Power-on/off data protection | Hardware-enforced write inhibition below VPOR (≈1.5 V) - prevents accidental writes during power ramp-up/down. |
| Ready/Busy status via DO pin | Enables efficient polling instead of fixed delays - reduces average write latency and improves system responsiveness. |
| Sequential read function | Allows continuous address increment with single CS assertion - optimizes burst reads of configuration blocks. |
Applications
| Industrial Sensor Calibration | Embedded Boot Configuration |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed once at power-up; interfaces via Microwire to MCU's GPIO bit-banged port. Use Value: Enables plug-and-play sensor replacement without reprogramming host firmware - leverages 200-year data retention and 1M-cycle endurance. | Use Scenario: Holding bootloader configuration flags (e.g., UART baud rate, boot source priority) in medical diagnostic equipment. IC Role / Device Role / Timing Role: Early-boot configuration store read before main application starts; accessed using minimal GPIO resources. Use Value: Reduces BOM count by eliminating dedicated configuration jumpers; supports field-upgradable settings via serial interface. |
| Smart Meter Firmware Parameters | Automotive Body Control Module Settings |
Use Scenario: Retaining tariff tables, meter ID, and communication channel settings in utility smart meters operating across wide temperature ranges. IC Role / Device Role / Timing Role: Secure, low-power configuration store updated infrequently but requiring guaranteed integrity over 15+ year deployments. Use Value: Meets IEC 62056 requirements via 1.8–5.5 V operation, –40°C to +85°C rating, and hardware write protection. | Use Scenario: Saving user preferences (e.g., mirror position, seat memory) in automotive BCMs where space and reliability are critical. IC Role / Device Role / Timing Role: Low-pin-count, AEC-Q200-aligned nonvolatile memory interfaced to 8-bit MCU via 3-wire bus. Use Value: TSSOP-8 footprint fits tight PCB layouts; 1 µA standby current extends battery backup life during vehicle sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56AT-I/MNY | VCC range 2.5–5.5 V; otherwise identical pinout, timing, and instruction set. | Not suitable for 1.8 V systems; requires higher minimum supply voltage. | Select only if system VCC never drops below 2.5 V - avoids potential brown-out during low-voltage operation. |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit (256 × 8), 1.8–5.5 V, 20 MHz max clock. | Requires additional chip select line and SPI-capable peripheral; incompatible command set. | Choose when migrating to SPI infrastructure or needing faster clock rates - not drop-in compatible. |
Compared with 93AA56AT-I/MNY, the 93LC56AT-I/MNY offers identical functionality but lacks 1.8 V support, while the AT25020B-MAHL-T provides higher speed and SPI compatibility at the cost of interface redesign and pin count increase.
Availability
93AA56AT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded boot configuration, and smart meter firmware parameter storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93AA56AT-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, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX series EEPROMs were designed specifically for cost-sensitive, low-power embedded systems requiring simple 3-wire serial nonvolatile memory with robust data integrity and extended temperature operation.
FAQ
What is the memory organization of the 93AA56AT-I/MNY?
The 93AA56AT-I/MNY has a fixed 256 × 8-bit organization. Unlike 'C' variants, it lacks an ORG pin and therefore does not support 16-bit word selection - it operates exclusively in x8 mode, simplifying interface design for 8-bit microcontrollers.
Does the 93AA56AT-I/MNY require an external pull-up resistor on the DO pin?
No, the 93AA56AT-I/MNY does not require an external pull-up on DO. The pin actively drives high/low during read or status polling and enters High-Z when inactive. However, a series resistor (e.g., 10 kΩ) is recommended if DI and DO are shorted to prevent bus conflict during dummy-zero read phases.
What is the minimum VCC required for reliable operation of the 93AA56AT-I/MNY?
The 93AA56AT-I/MNY requires VCC ≥ 1.8 V for full specification compliance. Its internal power-on reset (VPOR) activates below ≈1.5 V, disabling writes to prevent corruption - so operation below 1.8 V is undefined and unsupported per DS21794G.
How is write protection implemented on the 93AA56AT-I/MNY?
Write protection on the 93AA56AT-I/MNY is implemented via hardware POR (blocks writes below ≈1.5 V) and software-controlled EWEN/EWDS commands. The device powers up in EWDS mode; an explicit EWEN instruction is mandatory before any ERASE or WRITE operation.
Is the 93AA56AT-I/MNY pin-compatible with other 93XX56 variants in TSSOP-8 package?
Yes, the 93AA56AT-I/MNY is pin-compatible with all 93XX56A/B/C variants in TSSOP-8 (ST) package, including 93LC56AT-I/MNY and 93C56AT-I/MNY. Pin 1–8 assignments (CS, CLK, DI, DO, VSS, NC, ORG/NC, VCC) match exactly - though ORG is NC on 'A' versions and functional on 'C' versions.
93AA56AT-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:
- 2Kbit
- Memory Organization:
- 256 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)
93AA56AT-I/MNY FAQ
1.How can I place an order for 93AA56AT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56AT-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 93AA56AT-I/MNY reliable?
The price and inventory of 93AA56AT-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 93AA56AT-I/MNY is usually 5 days.
3.What payment methods are accepted for 93AA56AT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56AT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56AT-I/MNY?
93AA56AT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56AT-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 93AA56AT-I/MNY?
For technical support, including 93AA56AT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56AT-I/MNY requirements.
6.How does Aetrix verify that 93AA56AT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 93AA56AT-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 93AA56AT-I/MNY meets industry standards.
7.What is the process for return or replacement of 93AA56AT-I/MNY?
All 93AA56AT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56AT-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 93AA56AT-I/MNY part is unused and in its original packaging.
Return procedure for 93AA56AT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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