My Inquiry
My Account
Microchip Technology 93C56CT-E/SN
- Part No.:
- 93C56CT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C56CT-E/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,782
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93C56CT-E/SN from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 4.5–5.5 V supply range, and industrial/automotive temperature support (−40°C to +125°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and Ready/Busy status signaling via DO pin - used in automotive body control modules for calibration storage.
For engineers reviewing the 93C56CT-E/SN datasheet, 93C56CT-E/SN pinout, 93C56CT-E/SN application, or 93C56CT-E/SN equivalent, key selection criteria include VCC operating range (4.5–5.5 V), automotive-grade temperature rating (−40°C to +125°C), 8-bit organization (no ORG pin), 2-ms write cycle time, and SOIC-8 (SN) package compatibility with legacy PCB layouts.
Technical Context
The 93C56CT-E/SN implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins - no ORG pin (fixed 8-bit x256 organization). Its internal logic enforces power-on write protection: VCC must exceed 3.8 V before enabling EWEN, and all programming requires explicit Erase/Write Enable (EWEN) prior to ERASE or WRITE commands.
Timing behavior is differentiated from AA/LC variants: write/erase initiation occurs on the rising edge of CLK at the final data bit (not falling CS edge), and ERAL/WRAL require VCC ≥ 4.5 V. The DO pin serves dual function - serial data output during READ and open-drain Ready/Busy status indicator during programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin; supports byte-level addressing without word alignment overhead. |
| VCC Operating Range | 4.5 V to 5.5 V - designed for stable 5 V automotive and industrial rails; invalid below 3.8 V (VPOR threshold disables programming). |
| Temperature Range | −40°C to +125°C (Automotive E grade) - qualified for under-hood and powertrain applications per AEC-Q100 stress requirements. |
| Write Cycle Time | 2 ms typical - self-timed auto-erase-and-write; eliminates need for external timing control or polling delay estimation. |
| Endurance | 1,000,000 erase/write cycles - ensures >10-year reliability in firmware update or configuration logging use cases. |
| Data Retention | 200 years at +85°C - validated retention under accelerated high-temp aging; suitable for long-lifecycle automotive ECUs. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy microcontrollers lacking SPI hardware but supporting bit-banged Microwire protocols. |
Pinout & Package
Package: 8-lead SOIC (SN), Pb-free Matte Tin finish, 3.9 mm × 4.9 mm body, 1.27 mm pitch. Pin 1 marked by laser dot; pin 1 corner identified by beveled edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; device enters standby when low; minimum 250 ns CS low time required between instructions. |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stopped mid-transfer without corruption. |
| 3 (DI) | Data Input | Accepts Start bit, instruction opcodes, addresses, and write data; high-impedance when not selected. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); tri-states on CS falling edge; requires external pull-up for status polling. |
| 5 (VSS) | Ground | Reference return path; must be low-impedance connection to minimize noise coupling into serial interface. |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice; no routing required. |
| 7 (NC) | No Connect | Same as Pin 6; dual NC pins accommodate family pinout compatibility across A/B/C variants. |
| 8 (VCC) | Power Supply | 4.5–5.5 V supply; decoupling capacitor (100 nF ceramic) required within 5 mm of pin for stable write operation. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing circuitry or software delay loops; guarantees completion within 2 ms regardless of VCC or temperature. |
| Automatic ERAL before WRAL | Ensures full array erasure prior to bulk write - prevents partial writes or data corruption during firmware updates. |
| Power-on/off data protection | Hardware lockout below 3.8 V prevents inadvertent writes during brown-out or power ramp; no software initialization needed. |
| Ready/Busy status on DO | Enables efficient polling without dedicated status lines; reduces GPIO count and simplifies host firmware state machine. |
| 1,000,000 endurance cycles | Supports daily reprogramming over 27 years - sufficient for OTA update logging, adaptive learning, or diagnostic event storage. |
Applications
| Engine Control Unit (ECU) Calibration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing fuel trim tables, ignition timing maps, and sensor offset corrections that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 8-bit MCU via bit-banged Microwire; accessed during boot and runtime recalibration. Use Value: 256 × 8-bit capacity matches typical ECU parameter set size; 125°C rating ensures operation near engine bay heat sources. | Use Scenario: Holding door lock/unlock history, window position memory, and lighting configuration preferences. IC Role / Device Role / Timing Role: Serial EEPROM providing persistent user settings storage; accessed infrequently but requiring guaranteed data integrity over 15+ year vehicle life. Use Value: 200-year data retention at 85°C exceeds automotive lifecycle requirements; SOIC-8 footprint enables drop-in replacement in existing BCM designs. |
| Industrial PLC Configuration Backup | Medical Infusion Pump Parameter Storage |
Use Scenario: Saving I/O mapping, PID loop coefficients, and alarm thresholds during power loss in programmable logic controllers. IC Role / Device Role / Timing Role: Fail-safe nonvolatile memory holding critical operational parameters; accessed only during startup or configuration change. Use Value: 4.5–5.5 V operation aligns with standard 5 V PLC backplane rails; 1M endurance supports frequent field reconfiguration. | Use Scenario: Storing drug delivery profiles, dose limits, and calibration constants that must survive battery replacement and sterilization cycles. IC Role / Device Role / Timing Role: Certified medical-grade EEPROM storing safety-critical therapy parameters; accessed during pump initialization and dose verification. Use Value: Automotive-grade temperature qualification (−40°C to +125°C) covers extended thermal validation ranges required for medical device sterilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-E/SN | 128 × 16-bit organization; same 4.5–5.5 V range and −40°C to +125°C rating; requires 16-bit data handling in firmware. | Used where wider word access improves throughput (e.g., storing 16-bit ADC calibration coefficients). | Select if system bus width or firmware architecture favors 16-bit word access; otherwise 93C56CT-E/SN offers simpler byte-aligned addressing. |
| AT25DF021-SSH-T | SPI interface (4-wire), 2 Mbit density, 2.7–3.6 V operation; no automotive temp grade; supports sector erase and fast read. | Targeted at higher-density, lower-voltage consumer or industrial applications with SPI-native MCUs. | Not suitable for 5 V or automotive environments; choose only if migrating to SPI infrastructure and accepting reduced temperature margin. |
Compared with 93LC56BT-E/SN, the 93C56CT-E/SN provides native 8-bit addressing without firmware bit-packing; compared with AT25DF021-SSH-T, it delivers guaranteed automotive qualification and 5 V compatibility at lower density - making it optimal for cost-sensitive, safety-critical 5 V embedded systems.
Availability
93C56CT-E/SN is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device design requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 93C56CT-E/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, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx EEPROM product line was engineered for robust, low-pin-count nonvolatile memory in resource-constrained embedded systems - emphasizing reliability, wide temperature operation, and compatibility with legacy Microwire interfaces.
FAQ
What is the memory organization of the 93C56CT-E/SN?
The 93C56CT-E/SN has a fixed 256 × 8-bit (2 Kbit) organization. Unlike 'C'-suffix variants, it lacks an ORG pin and is not configurable for 16-bit mode - it operates exclusively in x8 mode, simplifying address decoding and firmware implementation for byte-oriented data structures.
Does the 93C56CT-E/SN require an external pull-up resistor on the DO pin?
Yes, the 93C56CT-E/SN requires an external pull-up resistor (typically 4.7 kΩ to VCC) on the DO pin to ensure valid logic-high levels during Ready/Busy status polling and read operations. Without it, the open-drain DO output cannot drive a high signal, causing communication failure or incorrect status interpretation.
What is the minimum VCC voltage required to enable write operations on the 93C56CT-E/SN?
The 93C56CT-E/SN requires VCC ≥ 3.8 V to enable erase/write functions - this is its VPOR (VCC Power-On Reset) threshold. Below 3.8 V, the internal write-protection circuit blocks EWEN execution, preventing accidental writes during power-up/down transitions or brown-out conditions.
How does the 93C56CT-E/SN differ from the 93AA56A/SN in terms of voltage range and temperature grade?
The 93C56CT-E/SN operates from 4.5–5.5 V and is rated for −40°C to +125°C (Automotive E grade), while the 93AA56A/SN supports 1.8–5.5 V and is rated only for −40°C to +85°C (Industrial I grade). This makes the 93C56CT-E/SN suitable for under-hood automotive applications where higher VCC stability and extended temperature tolerance are mandatory.
Can the 93C56CT-E/SN be used as a direct replacement for the 93C56A/SN?
Yes, the 93C56CT-E/SN is a functional and pin-compatible replacement for the 93C56A/SN. Both share identical 256 × 8-bit organization, SOIC-8 (SN) package, 4.5–5.5 V operation, and −40°C to +125°C rating; the 'T' suffix denotes tape-and-reel packaging, with no electrical or timing differences.
93C56CT-E/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:
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93C56CT-E/SN FAQ
1.How can I place an order for 93C56CT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56CT-E/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 93C56CT-E/SN reliable?
The price and inventory of 93C56CT-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C56CT-E/SN is usually 5 days.
3.What payment methods are accepted for 93C56CT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56CT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56CT-E/SN?
93C56CT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56CT-E/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 93C56CT-E/SN?
For technical support, including 93C56CT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56CT-E/SN requirements.
6.How does Aetrix verify that 93C56CT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93C56CT-E/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 93C56CT-E/SN meets industry standards.
7.What is the process for return or replacement of 93C56CT-E/SN?
All 93C56CT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C56CT-E/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 93C56CT-E/SN part is unused and in its original packaging.
Return procedure for 93C56CT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C56CT-E/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…
