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Microchip Technology 93AA56T-I/SN
- Part No.:
- 93AA56T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA56T-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,102
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Product details
Overview
93AA56T-I/SN from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 256 × 8-bit organization, supporting 1.8–5.5 V operation and industrial temperature range (−40°C to +85°C). It features Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), self-timed erase/write cycles, automatic ERAL before WRAL, and power-on/off data protection. Used in microcontroller firmware storage, calibration data retention, and configuration memory for embedded sensors.
For engineers reviewing the 93AA56T-I/SN datasheet, 93AA56T-I/SN pinout, 93AA56T-I/SN application, or 93AA56T-I/SN equivalent, key selection criteria include voltage compatibility (1.8–5.5 V), 8-bit word organization (no ORG pin), SOIC-8 package footprint, 1 million erase/write endurance, and Ready/Busy status via DO pin during programming.
Technical Context
The 93AA56T-I/SN implements a synchronous Microwire-compatible serial protocol with CS-active-high enable, rising-edge clock sampling, and 20-clock-cycle READ/WRITE instruction timing. Its internal architecture includes an address counter, mode decode logic, and output buffer enabling sequential read without reissuing addresses.
It operates in EWDS (Erase/Write Disable) state at power-up, requiring explicit EWEN command before any erase or write operation. The DO pin serves dual function: serial data output during READ and Ready/Busy status indicator (low = busy, high = ready) when CS is pulsed high after TCSL ≥250 ns during programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit organization; fixed x8, no ORG pin) |
| VCC range | 1.8 V to 5.5 V - supports single-supply operation across battery-powered and 3.3/5 V systems |
| Endurance | 1,000,000 erase/write cycles - enables long-term field updates in programmable devices |
| Data retention | 200 years at 25°C - ensures nonvolatile storage integrity over product lifetime |
| Interface | 3-wire Microwire-compatible (CS, CLK, DI, DO) - minimal GPIO usage, compatible with legacy MCU peripherals |
| Access time | TPD ≤ 400 ns (at 1.8 V, CL = 100 pF) - meets timing requirements for fast polling of DO status |
| Write cycle time | TWC = 6 ms (self-timed auto-erase/write) - eliminates need for external timing control |
| Temp range | Industrial: −40°C to +85°C - qualified for industrial control, metering, and automotive body electronics |
Pinout & Package
93AA56T-I/SN is packaged in 8-lead SOIC (SN) with standard pinout and 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 NC (no internal connection), pin 7 is NC (no internal connection), and pin 8 is VCC. ORG pin is not present - device is fixed 8-bit organization ('A' version).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge |
| CLK (Pin 2) | Serial Clock | Rising-edge synchronized I/O; clock can be paused mid-sequence; unused during self-timed write |
| DI (Pin 3) | Data Input | Accepts Start bit, opcode, address, and data; requires pull-down if shared with DO to avoid bus conflict |
| DO (Pin 4) | Data Output / Status | Outputs data during READ; indicates Ready/Busy (low = busy) when CS is pulsed high post-TCSL |
| VSS (Pin 5) | Ground | Reference for all digital and analog circuitry; must be low-impedance connection |
| NC (Pin 6) | No Internal Connection | Unbonded; may be left floating or tied to ground per layout best practice |
| NC (Pin 7) | No Internal Connection | Unbonded; no electrical function; no routing required |
| VCC (Pin 8) | Power Supply | 1.8–5.5 V supply; internal POR triggers at ~1.5 V; decoupling capacitor recommended near pin |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing circuitry; 6 ms typical cycle time includes auto-erase before write |
| Automatic ERAL before WRAL | Ensures full array is erased prior to Write All, preventing partial-write corruption |
| Power-on/off data protection | Hardware lockout below ~1.5 V VCC prevents inadvertent writes during brown-out or power ramp |
| Ready/Busy status via DO | Enables polling-based firmware flow control without dedicated status pins or interrupts |
| Sequential read mode | Continuous data stream across addresses with single CS assertion - reduces host CPU overhead |
| Pb-free & RoHS compliant | Matte Tin finish on SOIC-8 package meets global environmental compliance requirements |
Applications
| Smart Meter Calibration Storage | Industrial PLC Configuration Memory |
|---|---|
Use Scenario: Storing meter-specific calibration coefficients and tariff tables that require field updates over 10+ year service life. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced to an ARM Cortex-M3 MCU via GPIO bit-banged Microwire. Use Value: 200-year data retention and 1M endurance ensure calibration data survives repeated firmware upgrades and utility-side recalibrations. |
Use Scenario: Holding I/O mapping, PID loop parameters, and alarm thresholds in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Serial configuration EEPROM accessed during boot and runtime parameter adjustment via RS-485 host. Use Value: 1.8–5.5 V operation allows direct connection to 3.3 V MCU rails; SOIC-8 footprint simplifies PCB reuse across product variants. |
| Automotive Body Control Module (BCM) | Medical Infusion Pump Settings |
Use Scenario: Retaining seat position memory, mirror presets, and lighting profiles in 12 V automotive systems with local 3.3 V regulation. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to an 8-bit automotive MCU (e.g., PIC16F193x) with integrated Microwire peripheral. Use Value: Industrial temp range (−40°C to +85°C) and 1.8 V min VCC support cold-cranking and under-hood thermal cycling. |
Use Scenario: Storing drug library, dose limits, and user preferences in battery-powered portable infusion pumps requiring FDA-grade reliability. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory holding immutable operational parameters, accessed only during setup or maintenance. Use Value: Hardware write-protection (EWDS/EWEN) and power-fail immunity prevent accidental parameter corruption during battery swaps or low-VCC events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56B-I/SN | 128 × 16-bit organization; same VCC (2.5–5.5 V), but no 1.8 V support; fixed x16, no ORG | Requires 16-bit data path alignment; unsuitable for 8-bit MCU systems without byte-splitting logic | Select only if system uses native 16-bit data transfers and operates ≥2.5 V |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit (256 × 8), 1.8–5.5 V, 20 MHz max clock, 5 ms write time | Requires SPI peripheral instead of Microwire; higher speed but incompatible protocol stack | Choose for faster throughput where SPI is already used; not drop-in replaceable |
Compared with 93LC56B-I/SN, the 93AA56T-I/SN offers lower voltage operation (1.8 V) and guaranteed 8-bit alignment, while versus AT25020B-MAHL-T it provides protocol compatibility with legacy Microwire designs and simpler GPIO bit-banging implementation.
Availability
93AA56T-I/SN is available at Aetrix Electronics and suitable for smart meter calibration storage, industrial PLC configuration memory, and automotive body control module applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 93AA56T-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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX series EEPROMs, including the 93AA56T-I/SN, were designed for low-power, cost-sensitive embedded systems requiring reliable nonvolatile storage with minimal pin count and broad voltage flexibility.
FAQ
What is the memory organization of the 93AA56T-I/SN?
The 93AA56T-I/SN has a fixed 256 × 8-bit organization (2 Kbit total), corresponding to the 'A' variant in Microchip's 93XX56 family. It does not include an ORG pin and therefore cannot be configured for 16-bit operation - all read/write operations are strictly 8-bit aligned.
Does the 93AA56T-I/SN support 1.8 V operation?
Yes, the 93AA56T-I/SN supports a VCC range of 1.8 V to 5.5 V, making it compatible with modern ultra-low-power microcontrollers and battery-backed systems. Its power-on reset threshold is approximately 1.5 V, ensuring robust data protection during brown-out conditions.
How is write protection implemented on the 93AA56T-I/SN?
Write protection is implemented via hardware-enabled Erase/Write Enable (EWEN) and Erase/Write Disable (EWDS) commands. The 93AA56T-I/SN powers up in EWDS mode; an EWEN instruction must be issued before any ERASE or WRITE operation, and EWDS should follow each write to prevent accidental modification.
What package type is used for the 93AA56T-I/SN?
The 93AA56T-I/SN is supplied in an 8-lead SOIC package with Pb-free Matte Tin finish, designated by the suffix 'SN'. Its pinout matches industry-standard Microwire EEPROMs, with CS (pin 1), CLK (pin 2), DI (pin 3), DO (pin 4), VSS (pin 5), two NC pins (pins 6 and 7), and VCC (pin 8).
Can the 93AA56T-I/SN be used with a 3.3 V microcontroller?
Yes, the 93AA56T-I/SN is fully compatible with 3.3 V microcontrollers. Its VIH1 threshold is 2.0 V (min) at VCC ≥ 2.7 V, and its VOL1 is ≤ 0.4 V at IOL = 2.1 mA - meeting standard 3.3 V CMOS logic level requirements without level-shifting circuitry.
93AA56T-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:
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93AA56T-I/SN FAQ
1.How can I place an order for 93AA56T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56T-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 93AA56T-I/SN reliable?
The price and inventory of 93AA56T-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 93AA56T-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA56T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56T-I/SN?
93AA56T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56T-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 93AA56T-I/SN?
For technical support, including 93AA56T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56T-I/SN requirements.
6.How does Aetrix verify that 93AA56T-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA56T-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 93AA56T-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA56T-I/SN?
All 93AA56T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56T-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 93AA56T-I/SN part is unused and in its original packaging.
Return procedure for 93AA56T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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