My Inquiry
My Account
Microchip Technology 93LC56CT-I/SN
- Part No.:
- 93LC56CT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56CT-I/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:18,735
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93LC56CT-I/SN from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 128 × 16-bit organization, operating across 2.5–5.5 V supply and rated for industrial temperature (−40°C to +85°C). It features Microwire-compatible 3-wire serial interface (CS/CLK/DI/DO), self-timed erase/write cycles (6 ms typical), and automatic ERAL/WRAL support. Used in microcontroller-based systems for storing calibration data, configuration settings, or firmware patches.
For engineers reviewing the 93LC56CT-I/SN datasheet, 93LC56CT-I/SN pinout, 93LC56CT-I/SN application, or 93LC56CT-I/SN equivalent, key selection criteria include its 16-bit word mode (ORG = VCC), 1 million erase/write endurance, 200-year data retention, ready/busy status signaling via DO, and compatibility with space-constrained SOIC-8 (SN) packaging.
Technical Context
The 93LC56CT-I/SN implements a synchronous Microwire-compatible serial interface with start-bit detection, opcode-driven command set (READ/WRITE/ERASE/ERAL/WRAL/EWEN/EWDS), and hardware-level data protection including power-on/off voltage monitoring (VPOR = 1.5 V typical) and write-enable/disable latching. Its ORG pin is functional-tied to VCC to select x16 organization-and not NC.
Internal architecture includes an address decoder, data register, mode decode logic, and output buffer driving DO for both data output and Ready/Busy status polling. Programming operations are fully self-timed and do not require external clocking during erase/write execution; DO transitions to logic low during active programming and returns high upon completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (128 × 16-bit organization) |
| VCC range | 2.5 V to 5.5 V - supports direct connection to 3.3 V or 5 V logic domains without level shifting |
| Endurance | 1,000,000 erase/write cycles - enables long-term field updates in embedded control applications |
| Data retention | 200 years at 25°C - ensures nonvolatile storage integrity over product lifecycle without refresh |
| Write cycle time | 6 ms typical - defines minimum interval between successive WRITE or ERASE commands |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - sets upper bound on serial transaction throughput in host MCU firmware |
| Operating temp | −40°C to +85°C (Industrial grade) - qualified for use in industrial automation, metering, and automotive body electronics |
Pinout & Package
93LC56CT-I/SN is supplied in 8-lead SOIC package (SN), with gull-wing leads, 1.27 mm pitch, and Pb-free Matte Tin finish. Pin 1 marked by laser dot or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby but allows ongoing write to complete |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable at any point |
| DI | Data Input | Receives start bit, instruction opcodes, memory addresses, and write data; requires setup/hold timing relative to CLK |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS is low or during non-read states |
| VSS | Ground | Reference for all digital and analog circuitry; must be low-impedance connection to system ground plane |
| ORG | Organization Select | Logic high (VCC) selects 16-bit word mode; tied permanently on this variant - no external switching required |
| NC | No Connect | Pin 7 has no internal connection; must remain unconnected or grounded per layout best practice |
| VCC | Power Supply | 2.5–5.5 V supply input; includes internal POR circuit triggering at ~1.5 V to inhibit writes during power ramp |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for host MCU to manage timing delays - simplifies driver code and improves reliability |
| Automatic ERAL before WRAL | Ensures full array is erased prior to bulk write, preventing data corruption without explicit command sequencing |
| Ready/Busy status on DO | Enables polling-based flow control instead of fixed delays - reduces worst-case latency and improves system responsiveness |
| EWEN/EWDS write protection | Hardware-enforced lockout prevents accidental writes during normal operation unless explicitly enabled |
| Power-on/off data protection | Internal voltage monitor disables all write functions below 1.5 V - guarantees data integrity during brown-out or power cycling |
Applications
| Industrial Sensor Calibration | Smart Meter Configuration Storage |
|---|---|
Use Scenario: Storing factory-trimmed sensor gain/offset coefficients and temperature compensation tables in pressure or current transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed at power-up and during field recalibration; 16-bit word mode aligns with ADC result width. Use Value: Enables single-device calibration without external NVM, reducing BOM count and PCB area while supporting >1M field updates over product lifetime. | Use Scenario: Holding tariff schedules, communication protocol parameters, and tamper-event logs in electricity/water/gas meters. IC Role / Device Role / Timing Role: Serial EEPROM interfaced to metrology SoC or secure MCU; accessed via SPI-like Microwire bus during boot and scheduled maintenance windows. Use Value: Meets IEC 62056 and ANSI C12 compliance requirements for secure, long-retention parameter storage with deterministic write timing (6 ms max). |
| Automotive Body Control Module | Medical Device Setup Profiles |
Use Scenario: Saving user preferences (mirror position, seat memory, lighting modes) and fault history in BCMs for passenger vehicles. IC Role / Device Role / Timing Role: Industrial-grade EEPROM interfaced to 8/16-bit automotive MCU; operates across −40°C to +85°C ambient with robust ESD immunity (≥4 kV HBM). Use Value: Qualified for under-hood and cabin environments; 200-year retention ensures settings persist across vehicle ownership changes and 15+ year service life. | Use Scenario: Storing FDA-cleared operational profiles (dose limits, alarm thresholds, language settings) in portable infusion pumps and diagnostic handhelds. IC Role / Device Role / Timing Role: Safety-critical configuration memory accessed only during initialization or clinician-initiated setup; write-protected via EWEN/EWDS sequence. Use Value: Supports IEC 62304 Class B software requirements with verified 1M-cycle endurance and traceable write verification via DO status polling. |
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 | No ORG pin; fixed 128 × 16-bit organization; identical electrical specs and timing | Same footprint and interface behavior; eliminates need to tie ORG, simplifying layout | Select if ORG pin routing is undesirable and x16 mode is always required |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit (256 × 8), 1.8–5.5 V, 20 MHz max clock | Requires additional chip select line and different command set; higher speed but incompatible protocol | Select only when migrating to SPI-based host architecture and board redesign is feasible |
Compared with 93LC56B-I/SN, the 93LC56CT-I/SN offers identical functionality with explicit ORG control-useful for future-proofing or mixed x8/x16 designs-while AT25020B-MAHL-T provides faster throughput at the cost of interface incompatibility and loss of Microwire legacy support.
Availability
93LC56CT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, smart meter configuration storage, and automotive body control modules requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.
Supply support for 93LC56CT-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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LC56 series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal pin count and software overhead.
FAQ
What is the function of the ORG pin on the 93LC56CT-I/SN?
The ORG pin on the 93LC56CT-I/SN selects memory organization: when tied to VCC, it configures the device for 128 × 16-bit (x16) operation. Unlike A/B variants, the 'C' suffix indicates ORG is functional - and on this part, it is externally connected to VCC to fix x16 mode. This enables efficient storage of 16-bit sensor readings or MCU register values without byte-splitting logic.
Does the 93LC56CT-I/SN support sequential read operations?
Yes, the 93LC56CT-I/SN supports sequential read: when CS remains high after a READ instruction, the internal address counter automatically increments, and subsequent clock edges output the next memory location's data on DO. This allows burst reads of contiguous 16-bit words with minimal host MCU intervention, improving firmware efficiency in configuration loading routines.
How is write protection implemented on the 93LC56CT-I/SN?
Write protection on the 93LC56CT-I/SN uses dual hardware mechanisms: (1) Power-on reset disables writes until VCC exceeds ~1.5 V, and (2) Erase/Write Enable (EWEN) must be issued before any ERASE or WRITE command. The device powers up in EWDS (disable) state, and EWDS must be reissued after each write to prevent accidental modification - enforced entirely within silicon, independent of host software.
What is the maximum clock frequency supported by the 93LC56CT-I/SN at 3.3 V VCC?
At VCC = 3.3 V, the 93LC56CT-I/SN supports a maximum clock frequency of 2 MHz, as specified in Table 1-2 (A1). This limit ensures reliable setup/hold timing for DI and proper DO output delay (TPD ≤ 250 ns) under typical load conditions (CL = 100 pF), making it compatible with most 3.3 V MCUs running SPI/Microwire peripherals at standard speeds.
Can the 93LC56CT-I/SN be used in automotive applications requiring AEC-Q200 qualification?
No - the 93LC56CT-I/SN carries the 'I' (Industrial) temperature grade (−40°C to +85°C) and is not AEC-Q200 qualified. For automotive applications, Microchip offers the 93LC56BT-E/SN ('E' grade, −40°C to +125°C), which undergoes additional stress testing and screening per AEC-Q200 Rev D, but requires validation against specific vehicle subsystem requirements.
93LC56CT-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:
- 3 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC56CT-I/SN FAQ
1.How can I place an order for 93LC56CT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56CT-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 93LC56CT-I/SN reliable?
The price and inventory of 93LC56CT-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 93LC56CT-I/SN is usually 5 days.
3.What payment methods are accepted for 93LC56CT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56CT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56CT-I/SN?
93LC56CT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56CT-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 93LC56CT-I/SN?
For technical support, including 93LC56CT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56CT-I/SN requirements.
6.How does Aetrix verify that 93LC56CT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56CT-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 93LC56CT-I/SN meets industry standards.
7.What is the process for return or replacement of 93LC56CT-I/SN?
All 93LC56CT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56CT-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 93LC56CT-I/SN part is unused and in its original packaging.
Return procedure for 93LC56CT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56CT-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…
