My Inquiry
My Account
Microchip Technology 93C56BT-E/SN
- Part No.:
- 93C56BT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C56BT-E/SN.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,644
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93C56BT-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-temperature operation (–40°C to +85°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 for configuration storage in microcontroller-based embedded systems.
For engineers reviewing the 93C56BT-E/SN datasheet, 93C56BT-E/SN pinout, 93C56BT-E/SN application, or 93C56BT-E/SN equivalent, key selection criteria include its dedicated 8-bit organization (no ORG pin), TSSOP-8 package, automotive-grade temperature support (E suffix), and compatibility with legacy Microwire host controllers requiring deterministic timing and hardware write protection.
Technical Context
The 93C56BT-E/SN implements a synchronous serial interface with CS, CLK, and DI/DO pins, supporting opcode-driven instructions including READ (20 clocks), WRITE (20 clocks), ERASE (12 clocks), ERAL (12 clocks), and WRAL (20 clocks). Its internal logic enforces power-on write disable (EWDS default), requiring explicit EWEN before programming.
It uses CMOS EEPROM technology with auto-erase-before-write, 1,000,000 endurance cycles, and >200-year data retention. Unlike C-versions, it lacks an ORG pin and is fixed at 256 × 8-bit organization; unlike A/B variants with I-temp only, the "E" suffix denotes –40°C to +125°C automotive qualification, though this specific part (T-E/SN) is marked as E-temp but packaged in SN (SOIC) - per Device Selection Table, "93C56B" and "93C56C" list E-temp, while "93C56A" lists I/E; however, "93C56A" row shows Temp Ranges = "I, E", and "93C56BT-E/SN" matches that row's "E" designation and "SN" package code.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), fixed x8 organization - no ORG pin required; simplifies PCB layout and firmware address handling. |
| VCC range | 4.5 V to 5.5 V - compatible with 5 V logic systems; POR threshold at 3.8 V prevents spurious writes during brown-out. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy microcontrollers lacking SPI hardware but supporting bit-banged Microwire protocols. |
| Write cycle time | 2 ms typical - enables fast field updates without blocking host CPU for extended periods; supports WRAL with 15 ms full-array write. |
| Endurance & retention | 1,000,000 erase/write cycles and >200 years data retention - suitable for infrequently updated calibration or serial ID storage in industrial equipment. |
| Temperature grade | Automotive (E): –40°C to +125°C - qualified for under-hood or high-reliability control modules where thermal stress exceeds commercial limits. |
| Package | 8-lead SOIC (SN) - industry-standard footprint, hand-solderable, compatible with automated SMT assembly and IPC-7351B land patterns. |
Pinout & Package
8-lead SOIC (SN) package with standard 1.27 mm pitch; Pb-free Matte Tin finish; exposed pad not present (unlike DFN/TDFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between commands; deselects device into standby (ICCS ≤ 5 µA) but allows ongoing write to complete. |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers on rising edge; clock can pause mid-sequence; no clocks needed during self-timed write cycle. |
| 3 (DI) | Data Input | Accepts Start bit, opcodes, addresses, and write data; tied high with CS/CLK to initiate instruction sequence. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS low; requires CS high ≥250 ns after write start to poll status. |
| 5 (VSS) | Ground | Reference return path for all signals; must be low-impedance connection to minimize noise coupling into sensitive EEPROM core. |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS - no routing or loading permitted. |
| 7 (NC) | No Connect | Same as Pin 6; per Pin Function Table, both Pins 6 and 7 are NC on A/B devices like 93C56A/B. |
| 8 (VCC) | Power Supply | 4.5–5.5 V supply; internal voltage detector (VPOR = 3.8 V) blocks all writes below threshold to prevent corruption during power ramp. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or polling delays beyond Ready/Busy check - reduces firmware complexity and interrupt latency. |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write, preventing stale data remnants and ensuring deterministic initialization of memory contents. |
| Power-on/off data protection | Hardware-level lockout below 3.8 V prevents accidental writes during power-up/down transients - critical for fail-safe system boot sequences. |
| Erase/write enable/disable (EWEN/EWDS) | Explicit command-based write gating adds software-controlled security layer; device powers up in EWDS state, requiring deliberate EWEN before first write. |
| Sequential read mode | Enables continuous address incrementing while CS remains high - ideal for reading contiguous configuration blocks with minimal host overhead. |
Applications
| Motor Control Configuration | Industrial PLC Parameter Storage |
|---|---|
Use Scenario: Storing motor commutation tables, PID tuning constants, and fault log thresholds in brushless DC motor drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during startup and runtime reconfiguration; interfaces via bit-banged Microwire on resource-constrained MCU GPIOs. Use Value: Enables field-upgradable motor profiles without firmware reflashing; 256 × 8-bit capacity accommodates 32-parameter sets with checksums. | Use Scenario: Retaining I/O mapping, ladder logic scan times, and alarm setpoints across power cycles in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: System-critical parameter vault; accessed during cold start and hot backup; operates within –40°C to +125°C ambient per E-temp rating. Use Value: Ensures deterministic boot behavior and regulatory compliance (IEC 61131-3) by preserving certified operational parameters through uncontrolled outages. |
| Automotive Body Controller Calibration | Medical Device Serial ID & Audit Log |
Use Scenario: Storing window lift calibration offsets, mirror position memories, and lighting dimming curves in automotive body control modules (BCM). IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced to 8-bit MCU over Microwire; withstands load dump and cold crank conditions due to 4.5–5.5 V VCC range. Use Value: Meets AEC-Q100 Grade 2 requirements via E-temp qualification; 1M endurance supports lifetime recalibration events across 15-year vehicle service life. | Use Scenario: Recording unique device serial numbers, firmware revision stamps, and timestamped calibration audit trails in FDA-cleared diagnostic instruments. IC Role / Device Role / Timing Role: Tamper-resistant identity anchor; write-protected via EWDS after initial programming; accessed only during manufacturing test and service calibration. Use Value: Provides verifiable traceability for ISO 13485 compliance; >200-year retention ensures permanent record integrity beyond product end-of-life. |
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/SN | Same 256 × 8-bit organization, SOIC-8 package, but rated for Industrial (–40°C to +85°C) only; VCC range 2.5–5.5 V. | Not qualified for automotive under-hood use; lower minimum VCC enables battery-backed operation down to 2.5 V. | Select when cost-sensitive industrial designs require wider voltage flexibility and do not need AEC-Q100 compliance. |
| AT25020B-MAHL-T | 2 Kbit SPI EEPROM (256 × 8), SOIC-8, 1.8–5.5 V, 20 MHz SPI interface; no Ready/Busy pin - relies on WIP bit polling. | Requires SPI-capable host; lacks hardware status pin; higher speed but less deterministic timing than Microwire. | Choose for new designs with SPI peripherals available and where faster random access justifies protocol migration. |
Compared with 93LC56BT-I/SN, the 93C56BT-E/SN offers automotive temperature qualification and tighter VCC regulation (4.5–5.5 V), making it preferable for safety-critical environments; versus AT25020B-MAHL-T, it retains Microwire compatibility and hardware Ready/Busy signaling - advantageous for legacy MCU platforms with limited peripheral resources.
Availability
93C56BT-E/SN is available at Aetrix Electronics and suitable for motor control configuration, industrial PLC parameter storage, and automotive body controller calibration requiring stable component supply across extended production lifecycles.
Supply support for 93C56BT-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, serving automotive, industrial, consumer, and communications markets.
The 93Cxx EEPROM family was designed for reliable, low-power nonvolatile storage in resource-constrained embedded systems, emphasizing hardware data protection, wide temperature operation, and backward-compatible Microwire interfacing.
FAQ
What is the memory organization and capacity of the 93C56BT-E/SN?
The 93C56BT-E/SN is a 2 Kbit serial EEPROM organized as 256 words × 8 bits. It has no ORG pin and is fixed in x8 mode - unlike C-versions, it does not support word-size selection. This simplifies firmware development and eliminates external configuration logic. The 93C56BT-E/SN delivers deterministic addressing and timing for legacy Microwire hosts.
Does the 93C56BT-E/SN support both industrial and automotive temperature ranges?
Yes, the "E" suffix in 93C56BT-E/SN denotes automotive qualification: –40°C to +125°C. Per the Device Selection Table, 93C56A supports both I and E grades. This makes the 93C56BT-E/SN suitable for under-hood automotive modules, industrial controls in harsh thermal environments, and medical devices requiring extended operating margins.
How does write protection work on the 93C56BT-E/SN?
The 93C56BT-E/SN powers up in Erase/Write Disable (EWDS) mode. An explicit EWEN instruction must precede any ERASE or WRITE command. After programming, issuing EWDS re-enables hardware lockout. This two-step process prevents accidental writes during noise events or firmware glitches - a critical feature for safety-critical 93C56BT-E/SN deployments.
What package type is used for the 93C56BT-E/SN, and is it RoHS compliant?
The 93C56BT-E/SN uses an 8-lead SOIC package designated "SN" per Microchip's packaging codes. It features Pb-free Matte Tin (Sn) finish and is RoHS compliant. The SN package has standard 1.27 mm lead pitch, enabling compatibility with mainstream SMT assembly lines and manual rework using conventional SOIC tools.
Can the 93C56BT-E/SN be used interchangeably with 93AA56A or 93LC56A devices?
No - while functionally similar, the 93C56BT-E/SN has distinct electrical characteristics: its VCC range is 4.5–5.5 V (vs. 1.8–5.5 V for 93AA56A and 2.5–5.5 V for 93LC56A), and its write cycle time is 2 ms (vs. 6 ms for AA/LC versions). Substituting without validation risks brown-out corruption or timing violations; always verify voltage, timing, and temperature specs before cross-replacement of 93C56BT-E/SN.
93C56BT-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:
- 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
93C56BT-E/SN FAQ
1.How can I place an order for 93C56BT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56BT-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 93C56BT-E/SN reliable?
The price and inventory of 93C56BT-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 93C56BT-E/SN is usually 5 days.
3.What payment methods are accepted for 93C56BT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56BT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56BT-E/SN?
93C56BT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56BT-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 93C56BT-E/SN?
For technical support, including 93C56BT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56BT-E/SN requirements.
6.How does Aetrix verify that 93C56BT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93C56BT-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 93C56BT-E/SN meets industry standards.
7.What is the process for return or replacement of 93C56BT-E/SN?
All 93C56BT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C56BT-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 93C56BT-E/SN part is unused and in its original packaging.
Return procedure for 93C56BT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C56BT-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…
