My Inquiry
My Account
Microchip Technology 93LC56BT-E/SN
- Part No.:
- 93LC56BT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC56BT-E/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,135
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93LC56BT-E/SN from Microchip Technology Inc. is a 2 Kbit (256 × 8-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, power-on/off data protection, and 1,000,000 endurance cycles - used for parameter storage in engine control units and infotainment systems.
For engineers reviewing the 93LC56BT-E/SN datasheet, 93LC56BT-E/SN pinout, 93LC56BT-E/SN application, or 93LC56BT-E/SN equivalent, key selection considerations include its automotive temperature rating, 8-bit fixed organization (no ORG pin), SOIC-8 package, 3-wire serial protocol compatibility, and Ready/Busy status signaling via DO pin.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins. It uses internal auto-erase-before-write logic and supports sequential read, ERASE, WRITE, ERAL, WRAL, EWEN, and EWDS instructions. The absence of an ORG pin confirms fixed 8-bit word organization.
Power-on reset circuitry disables write operations until VCC exceeds 1.5 V, and the device enters Erase/Write Disable (EWDS) mode at power-up. Programming cycles are initiated by CS falling edge (for 93LC variants), with DO providing real-time Ready/Busy status when CS is reasserted after ≥250 ns low time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin required |
| VCC range | 2.5 V to 5.5 V - supports wide-input industrial and automotive rails |
| Endurance | 1,000,000 erase/write cycles - enables long-term field calibration storage |
| Data retention | >200 years at 25°C - ensures firmware parameter integrity over product lifetime |
| Temp grade | Automotive (E): −40°C to +125°C - qualified for under-hood and powertrain applications |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage on microcontrollers |
| Write cycle time | 6 ms typical - deterministic timing for host software timeout handling |
Pinout & Package
8-pin SOIC package (SN suffix), Pb-free Matte Tin finish, 150-mil body width. Pin 1 marked with laser dot; pin 1 corner identified by beveled edge or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into standby but allows ongoing write completion |
| CLK | Serial Clock | Positive-edge synchronized I/O; clocking stops during self-timed write; TCKH/TCKL vary with VCC (e.g., 200 ns min at 4.5–5.5 V) |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; high-impedance when not selected |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge; requires CS high ≥250 ns to sample status |
| VSS | Ground | Reference for all digital and analog functions; must be low-impedance connection |
| NC | No Connection | Pin 7 in SOIC-8; internally unconnected - must be left floating or tied to VSS per layout best practice |
| VCC | Power Supply | 2.5–5.5 V input; includes internal POR detection at ~1.5 V; powers EEPROM array and interface logic |
| ORG | Organization Select | Not present on 93LC56A/B variants - pin 6 is NC; only applicable to 'C' versions |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing components; host only waits for DO status or fixed 6 ms timeout |
| Automatic ERAL before WRAL | Guarantees full-array readiness before bulk write - prevents partial writes due to residual data |
| Power-on/off data protection | Hardware-level lockout below 1.5 V VCC; prevents corruption during brown-out or hot-swap events |
| Ready/Busy status on DO | Enables polling-based host firmware without dedicated interrupt lines or complex state machines |
| Industry-standard 3-wire interface | Direct compatibility with legacy Microwire peripherals and widely supported MCU SPI hardware in 3-wire mode |
Applications
| Engine Control Unit (ECU) | Automotive Infotainment System |
|---|---|
Use Scenario: Storing adaptive fuel trim values, fault codes, and calibration offsets that persist across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter memory interfaced to MCU via 3-wire serial bus; accessed during boot and runtime diagnostics. Use Value: Automotive temperature rating and 1M-cycle endurance ensure reliable operation over 15+ year vehicle lifetimes. | Use Scenario: Retaining user preferences (volume, equalizer, radio presets) and system configuration across power loss. IC Role / Device Role / Timing Role: Secondary configuration store paired with main application processor; accessed asynchronously during UI initialization. Use Value: 2.5–5.5 V VCC range matches infotainment power rail variations; SOIC-8 simplifies board-level repairability. |
| Body Control Module (BCM) | Advanced Driver Assistance System (ADAS) |
Use Scenario: Saving window position memory, mirror angle settings, and lighting profiles tied to driver ID. IC Role / Device Role / Timing Role: Dedicated EEPROM for human-machine interface (HMI) personalization data; isolated from main CAN bus traffic. Use Value: Sequential read function enables fast bulk load of multi-parameter sets; 200-year data retention prevents profile loss. | Use Scenario: Storing sensor calibration coefficients (e.g., camera lens distortion, radar offset) updated during factory programming or dealer service. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile storage for safety-critical calibration data; accessed only during initialization or maintenance mode. Use Value: Hardware write-protection (EWDS/EWEN) prevents accidental overwrites; automotive qualification meets AEC-Q100 stress test requirements. |
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 | Industrial temp grade (−40°C to +85°C); same 256×8-bit organization and SOIC-8 package | Not qualified for under-hood or powertrain use; suitable for cabin modules only | Select if automotive temperature range is unnecessary and cost optimization is prioritized |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit, 1.8–5.5 V, industrial temp; no Ready/Busy pin - relies on WIP flag polling | Lacks DO-based status signaling; requires different MCU driver implementation | Choose when migrating to SPI-based designs or consolidating with other Atmel SPI EEPROMs |
Compared with 93LC56B-I/SN, the 93LC56BT-E/SN adds automotive qualification and guaranteed operation up to +125°C; compared with AT25020B-MAHL-T, it retains Microwire compatibility and hardware Ready/Busy signaling - reducing firmware complexity in legacy 3-wire systems.
Availability
93LC56BT-E/SN is available at Aetrix Electronics and suitable for automotive control units, infotainment systems, and body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 93LC56BT-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, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona.
The 93LC56 series belongs to Microchip's legacy Microwire-compatible serial EEPROM product line, designed specifically for cost-sensitive, low-power, and automotive-qualified nonvolatile memory applications where minimal pin count and proven reliability are critical.
FAQ
What is the memory organization of the 93LC56BT-E/SN?
The 93LC56BT-E/SN has a fixed 256 × 8-bit organization. It is an 'A' version device, meaning the ORG pin is not implemented - pin 6 is NC. This eliminates configuration ambiguity and simplifies PCB layout versus 'C' variants requiring external ORG biasing.
Does the 93LC56BT-E/SN support both 8-bit and 16-bit word access?
No, the 93LC56BT-E/SN supports only 8-bit word access. As a 93LC56A variant, it lacks the ORG pin and is hardwired for x8 operation. For 16-bit access, engineers must select a 93LC56B or 93LC56C part instead.
What is the maximum clock frequency supported by the 93LC56BT-E/SN?
The 93LC56BT-E/SN supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V, and 2 MHz when VCC is 2.5–4.5 V. These limits are defined in Table 1-2 (AC Characteristics) of DS21794G and apply across its full automotive temperature range.
How does the Ready/Busy status work on the 93LC56BT-E/SN?
The DO pin outputs Ready/Busy status: logic low indicates ongoing erase/write, logic high means ready. To read status, CS must be brought high for ≥250 ns after completing the command sequence. DO returns to High-Z on CS falling edge.
Is the 93LC56BT-E/SN RoHS compliant and Pb-free?
Yes, the 93LC56BT-E/SN is Pb-free and RoHS compliant, with a Matte Tin (Sn) finish on its SOIC-8 package. This is explicitly stated in the Features section of DS21794G and confirmed in Microchip's packaging specification documentation.
93LC56BT-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:
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
93LC56BT-E/SN FAQ
1.How can I place an order for 93LC56BT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56BT-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 93LC56BT-E/SN reliable?
The price and inventory of 93LC56BT-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 93LC56BT-E/SN is usually 5 days.
3.What payment methods are accepted for 93LC56BT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56BT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56BT-E/SN?
93LC56BT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56BT-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 93LC56BT-E/SN?
For technical support, including 93LC56BT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56BT-E/SN requirements.
6.How does Aetrix verify that 93LC56BT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93LC56BT-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 93LC56BT-E/SN meets industry standards.
7.What is the process for return or replacement of 93LC56BT-E/SN?
All 93LC56BT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56BT-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 93LC56BT-E/SN part is unused and in its original packaging.
Return procedure for 93LC56BT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56BT-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…
