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Microchip Technology AT93C56B-MAHM-T
- Part No.:
- AT93C56B-MAHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT93C56B-MAHM-T.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8MINI MAP
- Quantity:
- Payment:
- Shipping:
Inventory:10,384
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Product details
Overview
AT93C56B-MAHM-T from Microchip Technology is a 2-Kbit three-wire serial EEPROM with user-selectable 256 × 8 or 128 × 16 organization, operating from 1.7V to 5.5V, rated for -40°C to +85°C, and featuring 1,000,000 write cycles and 100-year data retention. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules.
For engineers reviewing the AT93C56B-MAHM-T datasheet, AT93C56B-MAHM-T pinout, AT93C56B-MAHM-T application, or AT93C56B-MAHM-T equivalent, key selection factors include voltage range compatibility (1.7–5.5V), x8/x16 organization flexibility via ORG pin, self-timed 5 ms max write cycle, industrial temperature rating, and SOIC-8 package footprint.
Technical Context
The AT93C56B-MAHM-T implements a synchronous three-wire interface (CS/SK/DI/DO) with rising-edge clock synchronization and supports sequential read, ERASE, WRITE, WRAL, and ERAL commands. Its internal architecture includes an address register, row/column decoders, high-voltage generation, and power-on reset circuitry.
Memory organization is dynamically selected by the ORG pin: tied to VCC enables 128 × 16 mode; tied to GND enables 256 × 8 mode; unconnected defaults to x16 via internal 10 MΩ pull-up. All operations are controlled via 7-bit instruction set with address and data fields aligned to selected organization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,048 bits (256 × 8 or 128 × 16) |
| Supply Voltage Range | 1.7V to 5.5V - enables direct interfacing with 1.8V, 2.5V, 3.3V, and 5V logic systems without level shifters |
| Max Clock Frequency | 2 MHz at 4.5–5.5V - supports fast configuration loading in time-critical boot sequences |
| Write Cycle Time | ≤5 ms - self-timed; eliminates need for external timing control or polling overhead |
| Endurance | 1,000,000 write cycles - suitable for dynamic parameter logging or field-updatable calibration tables |
| Data Retention | 100 years at 55°C - ensures long-term reliability in sealed industrial enclosures |
| Operating Temperature | -40°C to +85°C - qualified for use in automotive under-hood modules and factory automation PLCs |
Pinout & Package
AT93C56B-MAHM-T is housed in an 8-lead SOIC package (3.9 mm × 4.9 mm body, 1.27 mm pitch). Pin 1 is marked with a beveled corner or dot; package conforms to JEDEC MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable: device enters active state only when CS = high; DO goes high-Z when CS = low |
| SK | Serial Data Clock | Rising-edge synchronized interface: all DI sampling and DO output occur on SK rising edge |
| DI | Serial Data Input | Receives instruction opcodes (e.g., READ, WRITE), addresses, and data; latched on SK rising edge |
| DO | Serial Data Output | Outputs read data or Ready/Busy status (logic '1' = ready, '0' = busy during write/erase) |
| GND | Ground Reference | System ground return path; must be low-impedance connection to minimize noise coupling into EEPROM core |
| ORG | Organization Select | Configures memory map: VCC = 128×16, GND = 256×8, open = 128×16 (10 MΩ internal pull-up) |
| NC | No Connect | Pin 7 is internally unconnected; must be left floating or tied to GND/VCC per PCB layout constraints |
| VCC | Power Supply | Single-supply input (1.7–5.5V); includes internal POR circuit requiring ≥100 µs stabilization before first command |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable x8 or x16 word width via ORG pin - eliminates firmware rework when migrating between byte- and word-addressed systems |
| Self-timed write cycle | Internal timing completes erase/write within 5 ms - removes requirement for external delay loops or status polling in host firmware |
| Three-wire serial interface | Minimal GPIO usage (CS/SK/DI/DO) - ideal for resource-constrained MCUs with limited SPI peripherals or no hardware SPI |
| Industrial temperature grade | Validated operation from -40°C to +85°C - supports deployment in motor drives, HVAC controllers, and outdoor metering equipment |
| Low-voltage operation down to 1.7V | Enables direct integration with 1.8V I/O domains - avoids level-shifter components and associated BOM cost and board space |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation lookup tables in pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-up initialization; read-only during normal operation. Use Value: Enables plug-and-play sensor replacement without manual recalibration; leverages 100-year retention to outlive product lifetime. |
Use Scenario: Saving user preferences (e.g., cooking time, temperature presets, child lock status) in microwave ovens and washing machines. IC Role / Device Role / Timing Role: Persistent parameter storage updated infrequently but requiring guaranteed write completion and immunity to brownout events. Use Value: Self-timed 5 ms write cycle ensures reliable save even during brief AC line dips; 1.7V operation prevents data corruption during low-battery backup conditions. |
| Automotive Body Control Module | Medical Infusion Pump Settings |
Use Scenario: Holding door lock actuation history, mirror position memory, and lighting dimming profiles in vehicle BCMs. IC Role / Device Role / Timing Role: Low-power configuration store accessed via MCU GPIO bit-banged interface; standby current ≤1.0 μA at 1.7V. Use Value: Meets automotive cold-cranking requirements (1.7V min) and supports extended battery-off storage without data loss. |
Use Scenario: Recording drug library parameters, flow rate limits, and alarm thresholds in Class II infusion pumps subject to IEC 62304. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory storing immutable operational constraints; write-protected via EWDS after initial programming. Use Value: 1,000,000 endurance supports full lifecycle validation; RoHS-compliant green packaging satisfies medical regulatory material restrictions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-DFMN6TP | 4-Kbit SPI interface (4-wire), fixed 32×8 organization, 5 MHz max clock, 2.5–5.5V supply | Lacks ORG pin flexibility and 1.7V operation; requires dedicated SPI peripheral instead of GPIO bit-banging | Select when higher density and faster SPI throughput are prioritized over ultra-low-voltage support and pin-count minimization |
| BR24G02FJ-3GE2 | 2-Kbit I²C interface (2-wire), 1.7–5.5V, 400 kHz standard mode, built-in write protection registers | Requires I²C master; lacks sequential read and WRAL/ERAL bulk commands; uses software address selection instead of ORG pin | Prefer when system already implements I²C infrastructure and needs integrated write-lock features for enhanced data integrity |
Compared with M95256-DFMN6TP and BR24G02FJ-3GE2, the AT93C56B-MAHM-T uniquely balances 1.7V operation, hardware-selectable organization, minimal 3-wire GPIO interface, and industrial temperature range - making it optimal for cost-sensitive, low-power, and space-constrained embedded designs where flexibility and robustness are critical.
Availability
AT93C56B-MAHM-T is available at Aetrix Electronics and suitable for industrial control systems, consumer appliance firmware storage, and automotive body electronics requiring stable component supply across multi-year production cycles.
Supply support for AT93C56B-MAHM-T 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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on embedded control and connectivity.
The AT93C56B-MAHM-T belongs to Microchip's legacy Atmel serial EEPROM product line, designed specifically for reliable, low-pin-count nonvolatile storage in cost-sensitive industrial and consumer applications.
FAQ
What is the memory organization of AT93C56B-MAHM-T?
The AT93C56B-MAHM-T provides 2,048 bits organized as either 256 words × 8 bits or 128 words × 16 bits. The selection is determined by the ORG pin: tied to VCC selects x16 mode; tied to GND selects x8 mode; left unconnected defaults to x16 via internal 10 MΩ pull-up. This hardware-based configuration eliminates firmware dependency and ensures deterministic behavior at power-up.
Does AT93C56B-MAHM-T support 1.8V operation?
Yes, AT93C56B-MAHM-T fully supports 1.8V operation as part of its 1.7V to 5.5V supply range. At 1.8V, it operates with reduced maximum clock frequency (250 kHz), guaranteed read/write functionality, and standby current ≤1.0 μA. This makes AT93C56B-MAHM-T compatible with modern low-voltage microcontrollers without level-shifting circuitry.
How does the Ready/Busy status work on AT93C56B-MAHM-T?
During a write or erase operation, AT93C56B-MAHM-T outputs Ready/Busy status on the DO pin when CS is brought high after being low for ≥tCS (1000 ns at 1.7V). A logic '1' indicates completion and readiness for next command; logic '0' indicates ongoing operation. This eliminates need for fixed delays and enables efficient host polling.
Is AT93C56B-MAHM-T RoHS compliant?
Yes, AT93C56B-MAHM-T is RoHS compliant and offered in green package options (lead-free, halide-free). The SOIC-8 package (MAHM) meets EU Directive 2011/65/EU and is suitable for environmentally regulated markets including automotive and medical devices.
Can AT93C56B-MAHM-T be used with a microcontroller lacking hardware SPI?
Yes, AT93C56B-MAHM-T is designed for bit-banged GPIO implementation of its three-wire interface (CS/SK/DI/DO). Its rising-edge synchronous protocol and absence of complex timing constraints make it ideal for MCUs with limited or no hardware SPI, reducing firmware complexity and enabling reuse across diverse processor families.
AT93C56B-MAHM-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-UFDFN 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, 128 x 16
- Memory Interface:
- 3-Wire Serial
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UDFN (2x3)
AT93C56B-MAHM-T FAQ
1.How can I place an order for AT93C56B-MAHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56B-MAHM-T 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 AT93C56B-MAHM-T reliable?
The price and inventory of AT93C56B-MAHM-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C56B-MAHM-T is usually 5 days.
3.What payment methods are accepted for AT93C56B-MAHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56B-MAHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56B-MAHM-T?
AT93C56B-MAHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56B-MAHM-T 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 AT93C56B-MAHM-T?
For technical support, including AT93C56B-MAHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56B-MAHM-T requirements.
6.How does Aetrix verify that AT93C56B-MAHM-T is sourced from the original manufacturer or authorized distributors?
All AT93C56B-MAHM-T 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 AT93C56B-MAHM-T meets industry standards.
7.What is the process for return or replacement of AT93C56B-MAHM-T?
All AT93C56B-MAHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56B-MAHM-T, 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 AT93C56B-MAHM-T part is unused and in its original packaging.
Return procedure for AT93C56B-MAHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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