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Microchip Technology AT93C56B-SSHM-T
- Part No.:
- AT93C56B-SSHM-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C56B-SSHM-T.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,054
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Product details
Overview
AT93C56B-SSHM-T from Microchip Technology is a 2-Kbit three-wire serial EEPROM with user-selectable x8 (256 × 8) or x16 (128 × 16) organization, operating from 1.7V to 5.5V, rated for -40°C to +85°C industrial temperature range, and featuring self-timed write cycles ≤5 ms - used for configuration storage in microcontroller-based sensor nodes and power management ICs.
For engineers reviewing the AT93C56B-SSHM-T datasheet, AT93C56B-SSHM-T pinout, AT93C56B-SSHM-T application, or AT93C56B-SSHM-T equivalent, key selection considerations include voltage compatibility (1.7–5.5 V), organization flexibility (x8/x16 via ORG pin), 2 MHz max clock at 5 V, 1M write endurance, and SOIC-8 package footprint with NC pin.
Technical Context
The AT93C56B-SSHM-T implements a synchronous three-wire interface (CS/SK/DI/DO) with instruction-based command set (READ, WRITE, ERASE, EWEN/EWDS, WRAL/ERAL). Its internal organization is dynamically selected by the ORG pin state (VCC = x16, GND = x8, floating = x16 via 10 MΩ pull-up).
It uses on-chip high-voltage generation for EEPROM programming, requires no external erase cycle, and features Power-on Reset (POR) with 100 µs tPUP delay before first command acceptance. Ready/Busy status is returned on DO after CS reassertion during write/erase operations.
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 |
| Max Clock Frequency | 2 MHz at VCC = 4.5–5.5 V - enables fast configuration reads in boot-time-critical systems |
| Write Cycle Time | ≤5 ms - eliminates need for external timeout logic; self-timed with DO status feedback |
| Endurance & Retention | 1,000,000 write cycles / 100 years data retention at 55°C - suitable for field-updatable calibration data |
| Operating Temperature | -40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor IoT endpoints |
| Interface Protocol | Three-wire serial (CS, SK, DI, DO) - minimal GPIO usage; no chip-select decoding logic required |
Pinout & Package
AT93C56B-SSHM-T is supplied in an 8-lead SOIC package (3.9 mm × 4.9 mm body, 1.27 mm pitch) with standard pin 1 marking. Pin 7 is NC (no connect); all other pins are functional per the three-wire interface and organization control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable: device ignores DI and tri-states DO when low; initiates command sequence on rising edge |
| SK | Serial Data Clock | Rising-edge synchronized I/O: latches DI, clocks DO, and controls timing of all instructions and data transfers |
| DI | Serial Data Input | Receives start bit, opcode, address, and write data; sampled on SK rising edge |
| DO | Serial Data Output | Outputs read data, dummy bit (first), and Ready/Busy status (after CS reassertion during write/erase) |
| GND | Ground Reference | System ground return path for VCC and all I/O; must be low-impedance for noise immunity |
| ORG | Organization Select | Configures memory map: tied to VCC → 128 × 16, tied to GND → 256 × 8, floating → defaults to x16 |
| NC | No Connect | Pin 7 is internally unconnected; must be left floating or tied to GND - no electrical function |
| VCC | Power Supply | Single supply input (1.7–5.5 V); powers logic, EEPROM array, and on-chip HV generator |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable x8/x16 organization | Hardware-configurable memory mapping via ORG pin - avoids firmware rework when changing data width requirements |
| Self-timed write cycle ≤5 ms | Eliminates need for external polling or fixed delays; DO pin provides real-time Ready/Busy feedback |
| 1.7 V minimum operation | Enables direct integration into ultra-low-power battery-backed systems without level-shifting circuitry |
| Industrial temperature rating | Validated operation from -40°C to +85°C - supports deployment in motor drives, HVAC controllers, and smart meters |
| Green RoHS-compliant packaging | Lead-free, halide-free 8-lead SOIC - meets IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) |
Applications
| Motor Control Configuration Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing motor phase alignment offsets, current limit thresholds, and PID tuning parameters in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during MCU boot before closed-loop operation begins. Use Value: Enables field recalibration without firmware update; retains settings across power cycles and brownouts. | Use Scenario: Holding factory-trimmed temperature/pressure compensation coefficients and sensor linearization tables in industrial transmitters. IC Role / Device Role / Timing Role: Serial configuration memory mapped by host MCU during sensor initialization sequence. Use Value: Supports one-time programmable (OTP)-like reliability with 1M write cycles for periodic recalibration. |
| Power Management IC Settings | Embedded System Bootloader Parameters |
Use Scenario: Saving dynamic voltage scaling profiles, fault recovery thresholds, and thermal shutdown hysteresis values in PMICs for portable devices. IC Role / Device Role / Timing Role: Standby-accessible parameter store queried by PMIC internal state machine at power-on reset. Use Value: Allows adaptive power policies without modifying PMIC silicon; operates down to 1.7 V during low-battery conditions. | Use Scenario: Storing secure boot keys, image validation hashes, and fail-safe recovery vector addresses in MCU bootloader partitions. IC Role / Device Role / Timing Role: Trusted nonvolatile memory accessed early in boot flow prior to RAM initialization. Use Value: Provides tamper-resistant storage for cryptographic metadata with 100-year data retention at elevated ambient temperatures. |
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-Kbit SPI interface (4-wire), 20 MHz max clock, 5 ms write time, same 1.8–5.5 V range | Requires dedicated SPI peripheral; higher bandwidth but larger footprint (8-lead SOIC same size, but different pinout) | Select when system already uses SPI peripherals and needs higher density or faster clocking |
| CAT24C02WI-GT3 | 2-Kbit I²C interface (2-wire), 400 kHz standard mode, 5 ms write time, 1.7–5.5 V range | Shares bus with other I²C devices; requires pull-up resistors and ACK/NACK handling in firmware | Select when board-level I²C bus is available and pin count is constrained (only 2 signal pins vs. 4 for AT93C56B) |
Compared with M95256-WMN6TP and CAT24C02WI-GT3, the AT93C56B-SSHM-T offers hardware-selectable memory width and simpler timing (no byte addressing overhead), making it optimal for deterministic boot-time configuration access in resource-limited MCUs.
Availability
AT93C56B-SSHM-T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor calibration, and embedded power management applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AT93C56B-SSHM-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT93C56B-SSHM-T belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems needing reliable, low-voltage configuration storage with minimal external components.
FAQ
What is the memory organization of AT93C56B-SSHM-T and how is it configured?
The AT93C56B-SSHM-T provides 2-Kbit EEPROM organized as either 256 × 8 or 128 × 16, selected by the ORG pin: tied to VCC for x16 mode, to GND for x8 mode, or left floating (defaulting to x16 via internal 10 MΩ pull-up). This hardware-selectable configuration eliminates firmware dependency on data width and allows reuse across multiple design variants. The AT93C56B-SSHM-T datasheet confirms this behavior in Section 2.6 and Table 5-2.
Does AT93C56B-SSHM-T require an external erase cycle before writing?
No, the AT93C56B-SSHM-T does not require a separate erase cycle before write operations. Each WRITE command automatically erases and reprograms the target location in a single self-timed operation (≤5 ms). The device uses on-chip high-voltage generation, and the ERASE instruction is optional - used only for selective location clearing. This simplifies firmware implementation and reduces write latency compared to legacy EEPROMs requiring explicit erase phases. The AT93C56B-SSHM-T specification confirms this in Section 3 and Figure 5-5.
What is the function of the NC pin on AT93C56B-SSHM-T?
Pin 7 of the AT93C56B-SSHM-T is designated NC (No Connect) and is internally unconnected. It must be left floating or tied to GND - it serves no electrical function and must not be driven or used as a signal path. This pin assignment is consistent across all 8-lead packages (SOIC, TSSOP, UDFN) per Microchip's DS20006260A-page 4 pinout diagram and Table 2-1. Misuse of the NC pin may compromise signal integrity or violate package mechanical constraints.
Can AT93C56B-SSHM-T operate reliably at 1.7 V supply voltage?
Yes, the AT93C56B-SSHM-T is fully specified and tested for operation at 1.7 V, including read, write, and standby modes. At this voltage, AC characteristics adjust accordingly: maximum clock frequency is 250 kHz (vs. 2 MHz at 5 V), and tWP remains ≤5 ms. DC parameters such as ISB1 (standby current) are characterized at 1.7 V (0.4–1.0 μA). This capability enables direct integration into energy-harvesting and coin-cell-powered systems without voltage boosting. The AT93C56B-SSHM-T electrical specs are detailed in Tables 4-1 through 4-4.
How does AT93C56B-SSHM-T indicate write completion during a programming cycle?
The AT93C56B-SSHM-T outputs Ready/Busy status on the DO pin: after initiating a WRITE or ERASE command, if CS is brought high (following minimum tCS low time), DO transitions to logic '0' (Busy) while programming proceeds and to logic '1' (Ready) upon completion. This status is valid only if CS is reasserted *during* the self-timed cycle - not after tWP expires. This real-time feedback eliminates polling delays and enables precise timing control in time-constrained boot sequences. The AT93C56B-SSHM-T timing diagrams in Figures 5-4 and 5-5 confirm this behavior.
AT93C56B-SSHM-T 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:
- 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-SOIC
AT93C56B-SSHM-T FAQ
1.How can I place an order for AT93C56B-SSHM-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56B-SSHM-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-SSHM-T reliable?
The price and inventory of AT93C56B-SSHM-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-SSHM-T is usually 5 days.
3.What payment methods are accepted for AT93C56B-SSHM-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56B-SSHM-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56B-SSHM-T?
AT93C56B-SSHM-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56B-SSHM-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-SSHM-T?
For technical support, including AT93C56B-SSHM-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56B-SSHM-T requirements.
6.How does Aetrix verify that AT93C56B-SSHM-T is sourced from the original manufacturer or authorized distributors?
All AT93C56B-SSHM-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-SSHM-T meets industry standards.
7.What is the process for return or replacement of AT93C56B-SSHM-T?
All AT93C56B-SSHM-T units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56B-SSHM-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-SSHM-T part is unused and in its original packaging.
Return procedure for AT93C56B-SSHM-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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