My Inquiry
My Account
Microchip Technology 93C56C-I/SN
- Part No.:
- 93C56C-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C56C-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:362
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93C56C-I/SN from Microchip Technology Inc. is a 2 Kbit serial EEPROM with Microwire-compatible 3-wire interface, ORG-pin-selectable 8-/16-bit word organization, 4.5–5.5 V supply range, and industrial temperature grade (–40°C to +85°C). It delivers 1 million erase/write cycles and >200 years data retention in 8-lead SOIC (SN) package, used for configuration storage in embedded controllers and power management systems.
For engineers reviewing the 93C56C-I/SN datasheet, 93C56C-I/SN pinout, 93C56C-I/SN application, or 93C56C-I/SN equivalent, key selection criteria include VCC operating range (4.5–5.5 V), ORG-dependent memory organization, Ready/Busy status signaling via DO, self-timed write/erase timing (2 ms), and Pb-free SOIC-8 packaging compliance.
Technical Context
The 93C56C-I/SN implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, where instruction execution begins on a Start condition (CS high + DI high at CLK rising edge). Its ORG pin directly configures internal address/data path width-logic high enables 128 × 16-bit mode; logic low selects 256 × 8-bit mode.
Write and erase operations are fully self-timed: for 93C-series devices, the rising edge of CLK on the final data bit initiates auto-erase-and-write, completing in 2 ms. Power-on/off data protection activates below 3.8 V VCC threshold, and EWEN/EWDS commands enforce explicit write-enable discipline before any programming cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit or 128 × 16-bit, selectable via ORG pin) |
| VCC range | 4.5 V to 5.5 V - ensures compatibility with 5 V logic systems and rejects brown-out corruption |
| Endurance | 1,000,000 erase/write cycles - supports frequent field firmware updates or calibration logging |
| Data retention | >200 years at 25°C - guarantees long-term configuration integrity without refresh |
| Write cycle time | 2 ms (TWC) - enables deterministic timing budgeting for host MCU firmware |
| Interface | 3-wire Microwire (CS/CLK/DI/DO) - minimal GPIO usage, no SPI mode bits required |
| Temp grade | Industrial (–40°C to +85°C) - validated for operation in industrial control enclosures |
Pinout & Package
8-lead SOIC (SN) package with standard 150-mil body width, Pb-free Matte Tin finish, and pin 1 identification via laser marking. Pin 1 = CS, pin 2 = CLK, pin 3 = DI, pin 4 = DO, pin 5 = VSS, pin 6 = ORG, pin 7 = NC, pin 8 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state |
| CLK | Serial Clock | Rising-edge synchronized I/O; clock stops freely during host preparation without affecting device state |
| DI | Data Input | Accepts Start bit, opcode, address, and data; requires external pull-down on CS per datasheet recommendation |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS goes low |
| ORG | Organization Control | Logic high → 128×16-bit; logic low → 256×8-bit; must be statically tied, not floated |
| VSS | Ground | Reference for all digital and analog circuitry; connects to system GND plane |
| NC | No Connect | Internally unconnected; must remain floating or grounded per PCB layout best practice |
| VCC | Power Supply | 4.5–5.5 V only; voltage detect circuit blocks writes below 3.8 V to prevent partial writes |
Key Features
| Feature | Design Value |
|---|---|
| ORG-pin word-size selection | Enables single BOM part to support both 8-bit microcontrollers (ORG = low) and 16-bit DSPs (ORG = high) |
| Self-timed erase/write | Eliminates need for host MCU to manage variable programming delays - fixed 2 ms TWC simplifies firmware |
| Automatic ERAL before WRAL | WRAL command internally executes full-array erase prior to write, ensuring clean memory state without separate ERAL step |
| Ready/Busy polling via DO | Allows host to avoid fixed delays; DO low = active programming, DO high = ready for next command |
| Power-on/off data protection | Hardware lockout below 3.8 V VCC prevents corruption during power ramp-up/down transients |
Applications
| Motor Control Configuration | Industrial Sensor Calibration |
|---|---|
Use Scenario: Storing motor commutation tables, PID coefficients, and fault thresholds in a brushless DC motor drive. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at startup and updated during field calibration routines. Use Value: Enables field-adjustable performance tuning while preserving settings across power cycles and firmware upgrades. | Use Scenario: Retaining factory-calibrated offset/gain values and linearization coefficients for pressure/temperature sensors. IC Role / Device Role / Timing Role: Low-power, infrequently written parameter vault with guaranteed 200-year retention. Use Value: Eliminates need for recalibration after equipment shipment or long-term storage; supports traceable metrology. |
| Power Supply Sequencing | Embedded System Bootloader |
Use Scenario: Holding power-rail sequencing delay values and voltage monitor thresholds in multi-rail AC/DC converters. IC Role / Device Role / Timing Role: Configuration register mapped to hardware sequencer logic via GPIO or dedicated interface. Use Value: Allows OEM-specific sequencing profiles without modifying ASIC or FPGA logic; supports regional safety certifications. | Use Scenario: Storing secure boot keys, firmware version flags, and recovery image pointers in medical or industrial gateways. IC Role / Device Role / Timing Role: Trusted nonvolatile storage for bootloader critical parameters with hardware write-protection (EWDS). Use Value: Prevents unauthorized firmware modification; enables authenticated dual-image failover with tamper-resistant metadata. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56C-I/SN | Wider VCC range (2.5–5.5 V); same pinout, ORG function, and instruction set | Supports battery-powered or mixed-voltage systems where 5 V rail may dip below 4.5 V | Select when system VCC varies below 4.5 V; otherwise 93C56C-I/SN offers tighter 5 V noise margin |
| AT25020B-MAHL-T | SPI interface (4-wire), 2.5–5.5 V, 2 Kbit, 1 MHz max clock, no ORG pin - fixed 256×8 organization | Requires SPI-capable MCU; lacks dynamic word-size flexibility but offers faster clock rate | Choose for SPI-native designs prioritizing speed over organization flexibility; verify DO contention handling differs from Microwire |
Compared with 93LC56C-I/SN, the 93C56C-I/SN provides higher VCC noise immunity but less voltage flexibility; versus AT25020B-MAHL-T, it trades SPI speed and simplicity for ORG-driven dual-word-size capability and Microwire compatibility.
Availability
93C56C-I/SN is available at Aetrix Electronics and suitable for industrial motor drives, sensor calibration modules, power supply sequencers, and embedded bootloader systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for 93C56C-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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, serving automotive, industrial, consumer, and communications markets.
The 93C56C-I/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-pin-count embedded systems requiring reliable nonvolatile storage with minimal MCU resource overhead.
FAQ
What is the function of the ORG pin on the 93C56C-I/SN?
The ORG pin on the 93C56C-I/SN selects memory organization: logic high (VCC) configures 128 × 16-bit mode; logic low (VSS) configures 256 × 8-bit mode. It must be statically tied-not floated-and determines instruction address width and data output length. This feature allows one 93C56C-I/SN part to serve both 8-bit and 16-bit host systems without redesign.
Does the 93C56C-I/SN require an external pull-up or pull-down resistor on the CS pin?
Yes, Microchip recommends a 10 kΩ external pull-down resistor on the CS pin of the 93C56C-I/SN to prevent unintended activation during power-up or noise events. This ensures the device remains in Standby mode until the host intentionally asserts CS high, improving system robustness against spurious writes.
How does the 93C56C-I/SN indicate readiness after a write operation?
The 93C56C-I/SN indicates readiness via the DO pin: during erase/write, DO outputs low (Busy); when complete, DO transitions high (Ready). Host firmware must bring CS high for ≥250 ns after the operation starts, then sample DO. A high DO confirms the 93C56C-I/SN is ready for the next instruction.
What is the minimum VCC voltage that permits write operations on the 93C56C-I/SN?
The 93C56C-I/SN disables all write operations below 3.8 V VCC, enforced by an internal voltage detector. This hard limit prevents partial writes or data corruption during brown-out conditions. Valid write operations require VCC ≥4.5 V, with full specification compliance guaranteed across 4.5–5.5 V.
Can the 93C56C-I/SN be used in automotive applications?
No, the 93C56C-I/SN is rated for Industrial temperature range (–40°C to +85°C) only. For automotive applications requiring –40°C to +125°C, Microchip offers the 93C56C-E/SN variant ('E' suffix). The 'I' grade 93C56C-I/SN is not qualified for under-hood or other AEC-Q100 environments.
93C56C-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 2ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93C56C-I/SN FAQ
1.How can I place an order for 93C56C-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56C-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 93C56C-I/SN reliable?
The price and inventory of 93C56C-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 93C56C-I/SN is usually 5 days.
3.What payment methods are accepted for 93C56C-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56C-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56C-I/SN?
93C56C-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56C-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 93C56C-I/SN?
For technical support, including 93C56C-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56C-I/SN requirements.
6.How does Aetrix verify that 93C56C-I/SN is sourced from the original manufacturer or authorized distributors?
All 93C56C-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 93C56C-I/SN meets industry standards.
7.What is the process for return or replacement of 93C56C-I/SN?
All 93C56C-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C56C-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 93C56C-I/SN part is unused and in its original packaging.
Return procedure for 93C56C-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C56C-I/SN Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
