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Microchip Technology AT93C56B-MAHM-E
- Part No.:
- AT93C56B-MAHM-E
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
AT93C56B-MAHM-E.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:635
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Product details
Overview
AT93C56B-MAHM-E 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 systems requiring low-voltage, space-constrained embedded design.
For engineers reviewing the AT93C56B-MAHM-E datasheet, AT93C56B-MAHM-E pinout, AT93C56B-MAHM-E application, or AT93C56B-MAHM-E equivalent, key selection factors include voltage range compatibility (1.7–5.5 V), industrial temperature operation, self-timed 5 ms max write cycle, three-wire interface timing at up to 2 MHz (5 V), and ORG-pin-configurable memory width.
Technical Context
The AT93C56B-MAHM-E implements a synchronous three-wire serial interface (CS/SK/DI/DO) with chip-select–gated communication and rising-edge clock synchronization. Its internal organization is dynamically selected via the ORG pin-tied to VCC for 128 × 16 mode or GND for 256 × 8 mode-enabling flexible byte/word addressing without external logic.
It integrates on-chip high-voltage generation for EEPROM programming, eliminating external charge pumps. All write operations are self-timed with automatic erase-before-write, and Ready/Busy status is reported via DO when CS is asserted post-command initiation-supporting efficient host polling without fixed delay loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,048 bits (256 × 8 or 128 × 16) |
| Supply Voltage Range | 1.7 V to 5.5 V - supports direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded deployment |
| Write Endurance | 1,000,000 cycles - enables frequent calibration or runtime parameter updates |
| Data Retention | 100 years at 55°C - ensures long-term reliability in unattended equipment |
| Max Clock Frequency | 2 MHz at 4.5–5.5 V - delivers 250 kbps read throughput with minimal bus overhead |
| Write Cycle Time | ≤5 ms - deterministic programming latency for time-critical firmware updates |
Pinout & Package
AT93C56B-MAHM-E is housed in an 8-lead SOIC package (3.9 mm × 4.9 mm body, 1.27 mm pitch). Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant, lead-free, and halide-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable: device responds only when CS = high; DO enters high-impedance state when CS = low |
| SK | Serial Data Clock | Rising-edge synchronized I/O: latches DI and clocks DO; supports variable frequency (up to 2 MHz at 5 V) |
| DI | Serial Data Input | Receives instruction opcodes, addresses, and write data; sampled on SK rising edge |
| DO | Serial Data Output | Outputs read data and Ready/Busy status; tri-stated when CS = low |
| GND | Ground Reference | System ground return path for VCC and all I/O signals |
| ORG | Organization Select | Configures memory width: VCC → 128 × 16; GND → 256 × 8; floating → defaults to x16 via internal pull-up |
| NC | No Connect | Pin 7 is internally unused and must remain unconnected per datasheet |
| VCC | Power Supply | Single-supply input (1.7–5.5 V); powers EEPROM array, control logic, and HV generator |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256 × 8 or 128 × 16 layout via ORG pin-no software reconfiguration needed |
| Low-voltage operation | Full functionality down to 1.7 V enables direct integration with battery-powered or energy-harvesting systems |
| Self-timed write cycle | Eliminates need for external timing control or wait-state insertion in host firmware |
| Ready/Busy status reporting | DO pin returns real-time status after write/erase initiation-enables efficient polling instead of fixed delays |
| Green packaging | Lead-free, halide-free, RoHS-compliant SOIC package meets global environmental compliance requirements |
Applications
| Industrial Sensor Calibration | Consumer Remote Control Memory |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and linearization tables in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed during power-up initialization and field recalibration routines. Use Value: Enables accurate analog signal conditioning across temperature and lifetime without external NVM or MCU flash wear management. |
Use Scenario: Retaining user-programmed channel presets, volume levels, and IR code learning history in universal remotes. IC Role / Device Role / Timing Role: Low-power, infrequent-write data keeper interfaced directly to 3.3 V microcontroller GPIOs. Use Value: Supports >100,000 power cycles with retained settings due to 100-year data retention and 1M endurance. |
| Medical Diagnostic Device Settings | Automotive Body Control Module |
Use Scenario: Saving operator preferences, alarm thresholds, and usage logs in portable ultrasound or glucose meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store with write-protection via EWEN/EWDS command sequence. Use Value: Meets IEC 62304 Class B software requirements through deterministic write timing and robust data integrity. |
Use Scenario: Holding door lock actuator calibration, mirror position memory, and lighting configuration in BCMs. IC Role / Device Role / Timing Role: Industrial-temperature EEPROM interfaced to CAN/LIN subsystem MCUs via minimal three-wire bus. Use Value: Eliminates need for larger SPI flash or MCU internal EEPROM-reducing BOM cost and PCB footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-WMN6TP | 4-wire SPI interface, 256 Kbit density, 5 MHz max clock, no ORG pin | Requires dedicated SPI peripheral; higher density but no hardware-configurable word width | Select when higher capacity and faster throughput are prioritized over pin count and organization flexibility |
| 25AA02E48-I/P | I²C interface, 2 Kbit, integrated MAC address, 1 MHz max clock, no ORG pin | Includes factory-programmed EUI-48 identifier; requires I²C master, not three-wire compatible | Choose for Ethernet/Wi-Fi node identity storage where I²C is already present and MAC address is required |
Compared with M95256-WMN6TP and 25AA02E48-I/P, the AT93C56B-MAHM-E uniquely offers hardware-selectable x8/x16 organization and true three-wire simplicity-reducing MCU GPIO usage and enabling direct drop-in replacement in legacy Atmel/Microchip designs without protocol translation.
Availability
AT93C56B-MAHM-E is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer remote control memory, medical diagnostic device settings, and automotive body control module applications requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for AT93C56B-MAHM-E 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT93C56B-MAHM-E belongs to Microchip's legacy Atmel serial EEPROM product line, designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-voltage nonvolatile storage with minimal interface overhead.
FAQ
What is the memory organization of AT93C56B-MAHM-E and how is it configured?
The AT93C56B-MAHM-E provides 2,048 bits organized as either 256 × 8 or 128 × 16, selected by the ORG pin: tied to VCC for x16 mode, GND for x8 mode, or left floating (defaulting to x16 via internal ~10 MΩ pull-up). This hardware-level configuration eliminates software overhead and ensures deterministic addressing behavior at power-on for the AT93C56B-MAHM-E.
Does AT93C56B-MAHM-E require an external high-voltage supply for write operations?
No. The AT93C56B-MAHM-E integrates an on-chip high-voltage generation circuit that autonomously produces the programming voltage required for EEPROM cell writes. This allows single-supply operation from 1.7 V to 5.5 V without external charge pumps or voltage boosters-simplifying system design and reducing bill-of-materials cost for the AT93C56B-MAHM-E.
How does AT93C56B-MAHM-E indicate write completion during programming?
The AT93C56B-MAHM-E outputs Ready/Busy status on the DO pin: after initiating a WRITE or ERASE command, if CS is brought high following a minimum tCS low period, DO asserts logic '0' while busy and transitions to logic '1' upon completion. This real-time feedback enables efficient host polling instead of fixed-delay waits, improving system responsiveness for the AT93C56B-MAHM-E.
Is AT93C56B-MAHM-E compatible with 1.8 V microcontrollers?
Yes. The AT93C56B-MAHM-E operates across 1.7 V to 5.5 V, including full DC and AC specifications at 1.8 V. Its VIH/VIL thresholds scale with VCC (e.g., VIH ≥ 0.7×VCC), and it supports 250 kHz clock rates at 1.7 V-ensuring robust interoperability with 1.8 V logic families and low-power MCUs without level-shifting for the AT93C56B-MAHM-E.
What is the maximum clock frequency supported by AT93C56B-MAHM-E at 3.3 V operation?
At 3.3 V, the AT93C56B-MAHM-E supports a maximum clock frequency of 1 MHz, as specified in its AC characteristics table for the 2.5 V ≤ VCC ≤ 5.5 V range. This ensures reliable timing margin for read/write operations in 3.3 V systems while maintaining compatibility with standard MCU SPI peripherals clocked below 1 MHz for the AT93C56B-MAHM-E.
AT93C56B-MAHM-E 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-E FAQ
1.How can I place an order for AT93C56B-MAHM-E through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56B-MAHM-E 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-E reliable?
The price and inventory of AT93C56B-MAHM-E 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-E is usually 5 days.
3.What payment methods are accepted for AT93C56B-MAHM-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56B-MAHM-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56B-MAHM-E?
AT93C56B-MAHM-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56B-MAHM-E 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-E?
For technical support, including AT93C56B-MAHM-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56B-MAHM-E requirements.
6.How does Aetrix verify that AT93C56B-MAHM-E is sourced from the original manufacturer or authorized distributors?
All AT93C56B-MAHM-E 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-E meets industry standards.
7.What is the process for return or replacement of AT93C56B-MAHM-E?
All AT93C56B-MAHM-E units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56B-MAHM-E, 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-E part is unused and in its original packaging.
Return procedure for AT93C56B-MAHM-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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