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Microchip Technology 93LC56CT-E/SN15KVAO
- Part No.:
- 93LC56CT-E/SN15KVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56CT-E/SN15KVAO.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,779
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Product details
Overview
93LC56CT-E/SN15KVAO from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with 128 × 16-bit organization, automotive-grade temperature range (–40°C to +125°C), 2.5–5.5 V supply, and Microwire-compatible 3-wire serial interface. 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 engine control units for calibration storage.
For engineers reviewing the 93LC56CT-E/SN15KVAO datasheet, 93LC56CT-E/SN15KVAO pinout, 93LC56CT-E/SN15KVAO application, or 93LC56CT-E/SN15KVAO equivalent, key selection considerations include its automotive qualification, ORG-pin-configurable x16 mode, 6 ms program cycle time, 1 million endurance cycles, and compatibility with legacy Microwire controllers in safety-critical embedded systems.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, supporting dedicated 16-bit word access when ORG is high. Its internal architecture includes an address decoder, data register, output buffer, and mode decode logic - enabling sequential read, ERASE, WRITE, ERAL, WRAL, EWEN, and EWDS instructions.
Operation requires a Start bit detection (CS and DI high on CLK rising edge), followed by opcode, address, and data clocked on CLK rising edges. The DO pin serves dual function: serial data output during READ and Ready/Busy status polling during programming - with status valid within 200–500 ns after CS high, depending on VCC.
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 wide-input industrial and automotive power rails |
| Temp Range | –40°C to +125°C (Automotive E grade) - qualified for under-hood ECUs |
| Write Cycle Time | 6 ms max - self-timed auto-erase/write enables deterministic firmware timing |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent calibration updates |
| Data Retention | 200 years at 25°C - ensures long-term reliability in sealed modules |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy microcontrollers |
Pinout & Package
8-lead SOIC (SN) package with Pb-free Matte Tin finish; pin 1 marked by laser dot; exposed pad not present (SOIC variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into Standby mode |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable mid-sequence without corruption |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; level-sensitive during Start detection |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal logic; must be low-impedance connection |
| ORG | Organization Select | High = 128×16-bit mode; low = 128×8-bit mode; required for x16 configuration in this C-version part |
| NC | No Connect | Pin 7 internally unconnected; must be left floating or tied to VSS per layout best practice |
| VCC | Power Supply | 2.5–5.5 V input; internal POR triggers at ~1.5 V; voltage detect ensures data integrity during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates external timing control - firmware waits only for DO status, not fixed delays |
| Automatic ERAL before WRAL | Guarantees full-array readiness prior to bulk write, preventing partial-program corruption |
| Power-On/Off Data Protection | Hardware-level lockout below 1.5 V VCC prevents inadvertent writes during power ramp |
| Ready/Busy Status Signal | DO pin provides real-time programming progress feedback without additional GPIO or polling overhead |
| Sequential Read Function | Enables continuous memory dump with single CS assertion - reduces transaction overhead in diagnostics |
Applications
| Engine Control Unit (ECU) Calibration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing adaptive fuel trim tables, knock sensor learning values, and emission-related parameters that update during vehicle operation. IC Role / Device Role / Timing Role: Nonvolatile parameter retention with guaranteed write integrity during ignition cycling and battery transients. Use Value: 1M endurance and 200-year retention ensure calibration data survives full vehicle lifecycle without degradation. | Use Scenario: Holding seat position memory, mirror angle presets, and lighting configuration across power cycles in premium vehicles. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced directly to 8-bit MCU with Microwire peripheral. Use Value: 2.5 V minimum VCC allows direct connection to 3.3 V rail; 6 ms write time enables fast user-setting saves. |
| Industrial Motor Drive Firmware Parameters | Traction Inverter Control Board |
Use Scenario: Saving motor tuning coefficients, current limit thresholds, and thermal derating curves updated via service tool. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration storage with hardware write-disable (EWDS/EWEN) sequence enforcement. Use Value: ORG pin enables 16-bit access for efficient coefficient loading; automotive temp grade ensures reliability near heat sinks. | Use Scenario: Storing inverter startup sequences, gate drive timing offsets, and fault log history in electric vehicle power electronics. IC Role / Device Role / Timing Role: High-reliability nonvolatile memory co-located with isolated gate driver ICs on high-noise PCBs. Use Value: Microwire interface avoids SPI bus contention; 125°C rating matches ambient near IGBT modules. |
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 | Dedicated 128×16-bit organization; no ORG pin - fixed x16 mode | Eliminates external ORG pull-up/pull-down but loses runtime reconfiguration capability | Select when x16 mode is permanent and board space must avoid routing ORG |
| AT25128B-MAHL-T | SPI interface (4-wire), 128 Kbit capacity, 1.8–5.5 V, 20 MHz clock | Higher density and faster interface, but requires SPI controller and different command set | Select when migrating to SPI-based platforms or requiring >2 Kbit storage |
Compared with 93LC56BT-E/SN, the 93LC56CT-E/SN15KVAO offers runtime word-size flexibility via ORG; compared with AT25128B-MAHL-T, it retains Microwire compatibility and lower pin count at the cost of density and speed - making it optimal for legacy automotive MCU integration.
Availability
93LC56CT-E/SN15KVAO is available at Aetrix Electronics and suitable for engine control units, body control modules, and industrial motor drives requiring stable component supply across extended automotive lifecycles.
Supply support for 93LC56CT-E/SN15KVAO 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, with global design and manufacturing operations.
The 93LC56 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power, and automotive-qualified embedded systems requiring Microwire protocol compatibility and robust data retention.
FAQ
What is the function of the ORG pin on the 93LC56CT-E/SN15KVAO?
The ORG pin on the 93LC56CT-E/SN15KVAO selects memory organization: tied high (to VCC), it configures the device for 128 × 16-bit mode; tied low (to VSS), it selects 128 × 8-bit mode. As a 'C' version part, the 93LC56CT-E/SN15KVAO requires this pin to be externally biased - unlike 'A' or 'B' versions which are fixed-organization. This flexibility allows one 93LC56CT-E/SN15KVAO footprint to serve multiple system data-width requirements.
Does the 93LC56CT-E/SN15KVAO support sequential read operation?
Yes, the 93LC56CT-E/SN15KVAO supports sequential read: when CS remains high after a READ instruction, the internal address counter automatically increments, and subsequent data words are output on DO without reissuing the opcode or address. This enables efficient bulk memory reads - for example, retrieving full calibration tables with minimal MCU intervention - and is confirmed in Section 2.7 of the DS21794G datasheet.
What is the maximum clock frequency supported by the 93LC56CT-E/SN15KVAO at 3.3 V VCC?
At VCC = 3.3 V (within the 2.5–5.5 V range), the 93LC56CT-E/SN15KVAO supports a maximum clock frequency of 2 MHz, as specified in Table 1-2 (A1 parameter) of DS21794G. This applies to all 93LC56A/B/C devices; higher frequencies (up to 3 MHz) require VCC ≥ 4.5 V. The timing constraint ensures reliable setup/hold margins for DI and DO transitions.
How does the 93LC56CT-E/SN15KVAO protect against accidental writes during power transitions?
The 93LC56CT-E/SN15KVAO incorporates dual-layer protection: first, a hardware voltage detector disables all write functions when VCC falls below ~1.5 V (Section 1.0, D11); second, it powers up in Erase/Write Disable (EWDS) mode, requiring an explicit EWEN instruction before any ERASE or WRITE can execute (Section 2.6). Both mechanisms prevent corruption during brownout, cold start, or reset - critical for automotive safety compliance.
Is the 93LC56CT-E/SN15KVAO pin-compatible with the 93LC56AT-E/SN?
No, the 93LC56CT-E/SN15KVAO is not pin-compatible with the 93LC56AT-E/SN. While both use the same 8-lead SOIC (SN) package and share CS/CLK/DI/DO/VSS/VCC pin assignments, the 93LC56AT-E/SN has no ORG pin - pin 6 is NC - whereas the 93LC56CT-E/SN15KVAO uses pin 6 as ORG. Substituting them requires PCB modification to route ORG or tie it appropriately, and firmware changes to manage organization selection.
93LC56CT-E/SN15KVAO 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:
- 2 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC56CT-E/SN15KVAO FAQ
1.How can I place an order for 93LC56CT-E/SN15KVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56CT-E/SN15KVAO 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-E/SN15KVAO reliable?
The price and inventory of 93LC56CT-E/SN15KVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56CT-E/SN15KVAO is usually 5 days.
3.What payment methods are accepted for 93LC56CT-E/SN15KVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56CT-E/SN15KVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56CT-E/SN15KVAO?
93LC56CT-E/SN15KVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56CT-E/SN15KVAO 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-E/SN15KVAO?
For technical support, including 93LC56CT-E/SN15KVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56CT-E/SN15KVAO requirements.
6.How does Aetrix verify that 93LC56CT-E/SN15KVAO is sourced from the original manufacturer or authorized distributors?
All 93LC56CT-E/SN15KVAO 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-E/SN15KVAO meets industry standards.
7.What is the process for return or replacement of 93LC56CT-E/SN15KVAO?
All 93LC56CT-E/SN15KVAO units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56CT-E/SN15KVAO, 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-E/SN15KVAO part is unused and in its original packaging.
Return procedure for 93LC56CT-E/SN15KVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56CT-E/SN15KVAO Tags
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