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Microchip Technology 93LC56B-E/P
- Part No.:
- 93LC56B-E/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
93LC56B-E/P.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,264
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Product details
Overview
93LC56B-E/P from Microchip Technology Inc. is a 2 Kbit (128 × 16-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5 V supply range, and automotive-grade temperature operation (−40°C to +125°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, Ready/Busy status signaling via DO pin, and 1,000,000 endurance cycles - used for nonvolatile parameter storage in engine control units and sensor calibration modules.
For engineers reviewing the 93LC56B-E/P datasheet, 93LC56B-E/P pinout, 93LC56B-E/P application, or 93LC56B-E/P equivalent, this page delivers verified electrical specs, package-confirmed pin functions, automotive-qualified timing behavior, real-world use scenarios, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The 93LC56B-E/P implements a dedicated 16-bit organization (no ORG pin), requiring no external configuration logic. Its Microwire-compatible protocol uses CS, CLK, and DI/DO with synchronous rising-edge clocking, supporting sequential read and status polling during erase/write operations.
It operates in EWEN/EWDS security mode: powers up in EWDS (write-disabled), requires explicit EWEN before any programming, and supports automatic ERAL prior to WRAL. VCC must be ≥4.5 V for ERAL and WRAL execution, and device enters standby when CS is low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (128 × 16-bit) - fixed x16 organization; no ORG pin; supports 16-bit data transfers per address. |
| VCC range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V systems; automotive grade requires ≥4.5 V for ERAL/WRAL. |
| Endurance | 1,000,000 erase/write cycles - specified at 25°C, VCC = 5.0 V; enables long-term field calibration updates. |
| Data retention | 200 years - ensures firmware parameter integrity over full vehicle lifecycle without refresh. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - defines maximum serial throughput; lower frequencies required at reduced VCC (e.g., 2 MHz at 2.5 V). |
| Write cycle time | 6 ms typical - self-timed auto-erase-and-write; eliminates need for external timing control or busy-wait loops beyond DO polling. |
| Operating temperature | −40°C to +125°C (Automotive E grade) - qualified for under-hood and transmission control module environments. |
Pinout & Package
93LC56B-E/P is supplied in 8-lead PDIP (Plastic Dual In-line Package) with Pb-free Matte Tin finish. Pin 1 is marked by laser dot; package meets JEDEC MS-001 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge (93LC series). |
| CLK | Serial Clock | Rising-edge synchronized I/O; clock can pause mid-transfer; no clocks required during erase/write cycle. |
| DI | Data Input | Accepts Start bit, opcode, address, and data; tied high with CS to detect Start condition. |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge; status valid only if CS reasserted after TCSL. |
| VSS | Ground | Reference for all digital and analog circuitry; must be low-impedance connection for reliable timing. |
| NC | No internal connection | Pin 7 in PDIP/SOIC; unused; must not be connected to avoid mechanical or ESD risk. |
| VCC | Power Supply | 2.5–5.5 V input; internal POR triggers at ~1.5 V; ≥4.5 V required for ERAL/WRAL commands. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing circuitry; internal state machine completes 6 ms cycle autonomously after CS fall. |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write; prevents partial-data corruption without host software intervention. |
| Ready/Busy status via DO | Enables efficient polling instead of fixed delays; reduces system latency and avoids unnecessary retries. |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC prevents spurious writes during brown-out or power ramp-up. |
| 1,000,000 endurance cycles | Supports >10 years of daily recalibration in automotive diagnostics without wear-out concerns. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim values and misfire counters across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter memory with guaranteed write completion under transient voltage conditions. Use Value: Maintains calibrated engine performance despite frequent power cycling and voltage sags during cranking. |
Use Scenario: Retaining camera lens calibration offsets and radar sensor alignment data after vehicle shutdown. IC Role / Device Role / Timing Role: Automotive-grade serial EEPROM interfacing directly with MCU SPI-like Microwire peripheral. Use Value: Enables zero-latency resume of ADAS functions at next power-on without factory recalibration. |
| Transmission Control Module (TCM) | Body Control Module (BCM) |
Use Scenario: Logging gear shift learning history and torque converter clutch adaptation tables. IC Role / Device Role / Timing Role: High-reliability 16-bit serial memory supporting burst reads during real-time shift decisions. Use Value: Ensures smooth shifting behavior evolves over vehicle lifetime without EEPROM fatigue failure. |
Use Scenario: Storing user-configurable lighting profiles, window position memory, and door lock settings. IC Role / Device Role / Timing Role: Low-power, 2.5 V–compatible nonvolatile storage accessible during sleep-mode wake events. Use Value: Delivers persistent personalization while meeting <1 µA standby current requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-I/P | Industrial grade (−40°C to +85°C); identical 128×16-bit organization, VCC 2.5–5.5 V, and pinout. | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules requiring AEC-Q100 compliance. | Select for cost-sensitive industrial controls where extended temperature is not required. |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit (256×8), 1.8–5.5 V, 20 MHz max clock; no Ready/Busy pin; uses WIP flag in status register. | Different protocol stack (SPI vs Microwire); requires MCU driver rewrite; lacks hardware status polling via DO. | Choose when migrating to higher-speed serial interfaces and existing design supports SPI peripherals. |
Compared with 93LC56B-E/P, the 93LC56BT-I/P offers identical functionality at lower cost but fails automotive thermal validation, while the AT25020B-MAHL-T enables faster communication yet demands firmware changes and removes direct hardware status visibility.
Availability
93LC56B-E/P is available at Aetrix Electronics and suitable for automotive control units, sensor calibration systems, and industrial programmable logic controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 93LC56B-E/P 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 components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 93LC56B-E/P belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for robust, low-power, Microwire-compatible nonvolatile storage in automotive and industrial environments where reliability under voltage transients and wide temperature excursions is critical.
FAQ
What is the memory organization of the 93LC56B-E/P?
93LC56B-E/P has a fixed 128 × 16-bit (2 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin - its x16 structure is hardwired, eliminating external configuration logic and simplifying PCB layout for 16-bit data paths. This matches the 'B' version designation in Microchip's 93XX56 family.
Does the 93LC56B-E/P support automatic erase before write operations?
Yes, the 93LC56B-E/P performs self-timed auto-erase before each WRITE or ERASE instruction. Additionally, the WRAL (Write All) command automatically executes ERAL (Erase All) first - ensuring full-array erasure without requiring separate host-initiated erase commands, which improves data consistency and reduces firmware complexity.
What is the minimum VCC required for ERAL and WRAL operations on the 93LC56B-E/P?
The 93LC56B-E/P requires VCC ≥ 4.5 V to execute ERAL (Erase All) and WRAL (Write All) instructions reliably. This threshold is specified in the Electrical Characteristics table (Param. D11) and enforced by internal voltage detection circuitry - operation below 4.5 V will inhibit these commands even if issued by the host.
How is Ready/Busy status monitored on the 93LC56B-E/P?
Ready/Busy status is signaled on the DO pin: logic low indicates ongoing erase/write activity; logic high confirms completion. To read status, CS must be brought high for ≥250 ns after the initial CS low pulse (TCSL), then sampled on subsequent CLK edges - DO remains High-Z if CS stays continuously low throughout the operation.
Is the 93LC56B-E/P pin-compatible with other 93XX56 variants in PDIP packaging?
Yes, the 93LC56B-E/P shares identical 8-lead PDIP pinout (P package) with all 93XX56A/B/C variants, including CS, CLK, DI, DO, VSS, NC, VCC assignments. However, functional compatibility depends on organization (x8 vs x16) and grade (E vs I); substituting a 93LC56A-E/P would require firmware changes to handle 8-bit data framing.
93LC56B-E/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
93LC56B-E/P FAQ
1.How can I place an order for 93LC56B-E/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56B-E/P 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 93LC56B-E/P reliable?
The price and inventory of 93LC56B-E/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC56B-E/P is usually 5 days.
3.What payment methods are accepted for 93LC56B-E/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56B-E/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56B-E/P?
93LC56B-E/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56B-E/P 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 93LC56B-E/P?
For technical support, including 93LC56B-E/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56B-E/P requirements.
6.How does Aetrix verify that 93LC56B-E/P is sourced from the original manufacturer or authorized distributors?
All 93LC56B-E/P 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 93LC56B-E/P meets industry standards.
7.What is the process for return or replacement of 93LC56B-E/P?
All 93LC56B-E/P units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56B-E/P, 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 93LC56B-E/P part is unused and in its original packaging.
Return procedure for 93LC56B-E/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56B-E/P Tags
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AT24C02C-XHM-T
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