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Microchip Technology 93AA56AT-I/MC
- Part No.:
- 93AA56AT-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
93AA56AT-I/MC.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,751
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Product details
Overview
93AA56AT-I/MC from Microchip Technology 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 for nonvolatile parameter storage in microcontroller-based sensor modules and power management ICs.
For engineers reviewing the 93AA56AT-I/MC datasheet, 93AA56AT-I/MC pinout, 93AA56AT-I/MC application, or 93AA56AT-I/MC equivalent, key selection criteria include its 256 × 8-bit fixed organization (no ORG pin), 6 ms max write cycle time, 1 million endurance cycles, and compatibility with space-constrained 8-lead 2×3 DFN (MC) packaging.
Technical Context
The 93AA56AT-I/MC implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals - no ORG pin (A-version). All instructions (READ, WRITE, ERASE, ERAL, WRAL, EWEN/EWDS) are initiated by a Start bit followed by opcode, address, and data bits clocked on CLK rising edges. Data output toggles on CLK rising edge with 200–400 ns delay (TPD), and DO serves dual role: data output during READ and Ready/Busy indicator during programming.
Power-on protection disables write operations until VCC exceeds 1.5 V; standby current is ≤1 µA at 25°C. The device enters EWDS mode at power-up and requires explicit EWEN before any erase/write. Write operations auto-erase target location prior to programming, and WRAL performs full-array write after implicit ERAL - both requiring VCC ≥4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization; fixed, no ORG pin) |
| VCC operating range | 1.8 V to 5.5 V - supports single-supply battery-powered systems down to 1.8 V |
| Write cycle time | 6 ms max - determines minimum time between successive writes; impacts firmware polling design |
| Data retention | >200 years - ensures long-term calibration or configuration storage without refresh |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates in industrial control logging |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage; no SPI mode select needed |
| Temperature grade | Industrial (–40°C to +85°C) - qualified for embedded industrial and automotive body electronics |
Pinout & Package
Package: 8-lead 2×3 mm DFN (exposed pad), Pb-free Matte Tin finish, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into standby (≤1 µA ICCS) |
| 2 - CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| 3 - DI | Data Input | Receives Start bit, opcodes, addresses, and write data; high-impedance when not selected |
| 4 - DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); high-Z when CS low or during non-read states |
| 5 - NC | No internal connection | Not bonded; must be left floating or tied to GND per layout best practice |
| 6 - ORG/NC | Organization select / No connect | NC on A-version; unused pin - no external connection required |
| 7 - VSS | Ground | Reference for all I/O and internal circuitry; exposed pad (Pin 8) must be connected to VSS for thermal/electrical performance |
| 8 - VCC | Power supply | 1.8–5.5 V input; internal POR triggers at ~1.5 V; powers internal charge pump for write operations |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or firmware delays - write completes autonomously in ≤6 ms |
| Automatic ERAL before WRAL | Ensures full-array write reliability without separate erase command - simplifies firmware logic for factory reset |
| Ready/Busy status on DO | Enables efficient polling instead of fixed delays - reduces worst-case latency and improves system responsiveness |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC prevents corruption during brown-out or hot-plug events |
| 1 M endurance / 200 yr retention | Supports >10 years of daily reconfiguration in industrial gateways without wear leveling |
Applications
| Motor Control Configuration Storage | Smart Sensor Calibration Memory |
|---|---|
Use Scenario: Storing motor phase offset, current limits, and PID coefficients in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed at startup and during field updates via MCU's Microwire peripheral. Use Value: Enables plug-and-play motor replacement with retained tuning; eliminates manual recalibration. | Use Scenario: Holding factory-calibrated gain/offset values and temperature compensation coefficients in MEMS pressure sensors. IC Role / Device Role / Timing Role: Microwire-configured EEPROM providing deterministic 200 ns TPD read access during sensor initialization. Use Value: Guarantees measurement accuracy across temperature without host CPU intervention. |
| Industrial PLC I/O Module Settings | Power Supply Trim Storage |
Use Scenario: Saving channel-specific scaling factors, alarm thresholds, and input filter settings in modular I/O bases. IC Role / Device Role / Timing Role: 8-bit serial EEPROM interfaced to ARM Cortex-M4 host; accessed during module enumeration. Use Value: Allows field reconfiguration of analog input ranges without firmware update or hardware change. | Use Scenario: Storing digital trim codes for DC-DC converter feedback resistors in programmable power supplies. IC Role / Device Role / Timing Role: Low-power 2 Kbit memory retaining precision trim values across power cycles and thermal cycling. Use Value: Maintains ±0.5% output voltage accuracy over 10+ years without recalibration. |
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/MC | VCC range 2.5–5.5 V; identical 256 × 8-bit organization and pinout | Not suitable for 1.8–2.4 V systems; higher VCC min limits use in ultra-low-power IoT nodes | Select if system VCC never drops below 2.5 V and legacy 93LC qualification is required |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit (256 × 8), 1.8–5.5 V, 5 ms max write time | Requires additional CS and SO pins; incompatible instruction set - firmware rewrite needed | Choose only when migrating to SPI-based platforms or requiring faster 5 ms writes |
Compared with 93LC56AT-I/MC, the 93AA56AT-I/MC supports lower VCC operation critical for battery-backed systems; versus AT25020B-MAHL-T, it retains Microwire compatibility and requires no firmware interface changes but trades off slightly longer write time.
Availability
93AA56AT-I/MC is available at Aetrix Electronics and suitable for industrial PLC modules, smart sensor calibration, and motor control configuration storage requiring stable component supply across extended product lifecycles.
Supply support for 93AA56AT-I/MC 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 components, and memory solutions, headquartered in Chandler, Arizona.
The 93AAxx series is designed specifically for low-voltage, low-power serial EEPROM applications in cost-sensitive industrial and consumer systems where Microwire compatibility and robust data integrity are essential.
FAQ
What is the memory organization of the 93AA56AT-I/MC?
The 93AA56AT-I/MC is a fixed 256 × 8-bit (2 Kbit) organization device with no ORG pin - it does not support 16-bit word mode. This differs from C-versions (e.g., 93AA56CT-I/MC) which use the ORG pin to switch between x8/x16 modes. The A-version simplifies PCB layout and firmware by eliminating configuration dependency on external logic levels.
Does the 93AA56AT-I/MC require an external pull-up resistor on the DO pin?
No, the 93AA56AT-I/MC does not require an external pull-up on DO. The DO pin actively drives high/low during READ and Ready/Busy status reporting, and enters high-impedance (High-Z) state otherwise. However, if DI and DO are shorted (shared bus), a current-limiting resistor is recommended to prevent bus conflict during dummy-zero read phases.
What is the minimum VCC required for reliable write operations on the 93AA56AT-I/MC?
The 93AA56AT-I/MC requires VCC ≥ 1.8 V for all operations, but reliable erase/write functionality mandates VCC ≥ 4.5 V for ERAL and WRAL commands. For standard byte/page writes, VCC ≥ 1.8 V is sufficient; however, internal charge pump efficiency degrades below 2.5 V, increasing write time variability. Always verify VCC stability during programming via oscilloscope.
How is the Ready/Busy status monitored on the 93AA56AT-I/MC?
Ready/Busy status is monitored on the DO pin: DO = low indicates active erase/write in progress; DO = high indicates completion. To sample status, CS must be brought high for ≥250 ns after initiating the command, then DO is sampled on CLK rising edges. After completion, issuing a Start bit followed by CS low clears the status flag from DO.
Is the exposed pad on the 93AA56AT-I/MC's DFN package electrically connected?
Yes, the exposed pad (Pin 8) on the 93AA56AT-I/MC's 8-lead 2×3 DFN (MC) package is internally connected to VSS and must be soldered to a PCB ground plane. This connection provides critical thermal dissipation during write cycles and reduces ground impedance for stable operation. Leaving it unconnected may cause erratic behavior or reduced endurance.
93AA56AT-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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-DFN (2x3)
93AA56AT-I/MC FAQ
1.How can I place an order for 93AA56AT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56AT-I/MC 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/MC reliable?
The price and inventory of 93AA56AT-I/MC 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/MC is usually 5 days.
3.What payment methods are accepted for 93AA56AT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56AT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56AT-I/MC?
93AA56AT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56AT-I/MC 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/MC?
For technical support, including 93AA56AT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56AT-I/MC requirements.
6.How does Aetrix verify that 93AA56AT-I/MC is sourced from the original manufacturer or authorized distributors?
All 93AA56AT-I/MC 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/MC meets industry standards.
7.What is the process for return or replacement of 93AA56AT-I/MC?
All 93AA56AT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56AT-I/MC, 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/MC part is unused and in its original packaging.
Return procedure for 93AA56AT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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