My Inquiry
My Account
Microchip Technology 93LC56B/P
- Part No.:
- 93LC56B/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
93LC56B/P.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:117
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93LC56B/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 industrial temperature grade (–40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, and Ready/Busy status via DO pin - used in microcontroller-based system configuration storage and calibration data retention.
For engineers reviewing the 93LC56B/P datasheet, 93LC56B/P pinout, 93LC56B/P application, or 93LC56B/P equivalent, key selection criteria include 16-bit word organization, 6 ms erase/write cycle time, VCC-dependent clock frequency (up to 3 MHz at 4.5–5.5 V), Pb-free PDIP-8 packaging, and compatibility with legacy Microwire controllers requiring no address latching.
Technical Context
The 93LC56B/P implements a synchronous serial interface with CS, CLK, and DI/DO pins, supporting dedicated 16-bit memory organization without ORG pin dependency. Its instruction set includes READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS - all executed via rising-edge clocked bit streams starting with a Start condition (CS high + DI high).
Internally, it uses CMOS EEPROM array with auto-erase-before-write architecture and on-chip power-on/off protection circuitry that inhibits operation below ~1.5 V. The DO pin serves dual function: serial data output during READ and active-low Ready/Busy indicator during programming - cleared only after CS toggling post-cycle completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (128 words × 16 bits) - fixed x16 organization eliminates external word-width logic. |
| VCC range | 2.5 V to 5.5 V - supports direct interfacing with 3.3 V and 5 V microcontrollers without level shifters. |
| Endurance | 1,000,000 erase/write cycles - enables long-term field calibration updates in industrial sensors. |
| Data retention | Greater than 200 years - ensures firmware parameter integrity across product lifecycle without refresh. |
| Write cycle time | 6 ms typical - defines minimum interval between successive WRITE/ERAL/WRAL commands. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - sets maximum data throughput of ~375 kbps for 16-bit writes. |
| Operating temp | –40°C to +85°C (Industrial grade) - qualified for use in motor control, HVAC, and metering applications. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy PIC® MCU peripherals and FPGA soft controllers. |
Pinout & Package
93LC56B/P is supplied in 8-lead PDIP (Plastic Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin 1 is marked by notch or dot; package is Pb-free with Matte Tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable: must be held high ≥250 ns between instructions; deselects device into standby but allows ongoing write to complete. |
| CLK (Pin 2) | Serial Clock | Synchronizes all bit transfers on rising edge; clock can pause mid-sequence without state loss. |
| DI (Pin 3) | Data Input | Accepts Start bit, opcodes, addresses, and write data; requires stable setup/hold timing relative to CLK. |
| DO (Pin 4) | Data Output / Status | Outputs read data or drives low during erase/write; high-Z when idle or CS low - requires pull-up for status polling. |
| VSS (Pin 5) | Ground | Reference return path for all I/O and internal logic; must be low-impedance connection to minimize noise coupling. |
| NC (Pin 6) | No Connect | Internally unconnected; must remain floating - not usable as strap or bypass node. |
| NC (Pin 7) | No Connect | Internally unconnected; electrically isolated - no routing or termination required. |
| VCC (Pin 8) | Power Supply | Supplies core and interface logic; voltage detect circuit blocks operation below ~1.5 V to prevent partial writes. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control - host processor can poll DO or insert fixed 6 ms delay without clock stretching. |
| Automatic ERAL before WRAL | Guarantees full-array readiness prior to bulk write - prevents partial overwrites and data corruption. |
| Power-on/off data protection | Hardware lockout below VCC threshold (~1.5 V) prevents inadvertent writes during brown-out or hot-plug events. |
| Ready/Busy status on DO | Enables efficient polling-based firmware flow - avoids fixed delays and improves system responsiveness. |
| 128 × 16-bit fixed organization | Reduces software overhead vs. x8 variants - each WRITE transmits one native 16-bit word without byte packing. |
| Pb-free PDIP-8 package | Meets RoHS compliance requirements while maintaining legacy through-hole assembly compatibility. |
Applications
| Motor Control Configuration | Smart Meter Calibration Storage |
|---|---|
Use Scenario: Storing PID tuning parameters, fault thresholds, and motor profile tables in embedded BLDC drivers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime reconfiguration. Use Value: Enables field-upgradable motor behavior without firmware reflashing; 16-bit word width matches typical controller register width. | Use Scenario: Retaining energy calibration coefficients, tariff schedules, and tamper-event logs in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Secure, long-life data logger with guaranteed 200-year retention under thermal stress. Use Value: Eliminates battery-backed SRAM; withstands repeated power cycling during grid outages. |
| Industrial PLC I/O Mapping | Medical Device Setup Parameters |
Use Scenario: Holding digital I/O pin assignments, scaling factors, and alarm hysteresis values in DIN-rail programmable logic controllers. IC Role / Device Role / Timing Role: System-level configuration store accessed by ARM Cortex-M host via GPIO-banged Microwire. Use Value: Supports factory and field customization without PCB redesign; 1M endurance tolerates frequent commissioning cycles. | Use Scenario: Saving user-selected therapy modes, sensor offsets, and safety limits in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Certified nonvolatile memory for critical setup data subject to IEC 62304 Class B requirements. Use Value: Meets medical regulatory retention and reliability mandates without external error correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56B/SN | Same 128×16-bit organization and electrical specs, but in SOIC-8 package with gull-wing leads. | Requires surface-mount assembly; smaller footprint but no through-hole serviceability. | Select for space-constrained PCBs where rework access is not required. |
| 93LC56BT-I/P | Identical functionality and pinout, but with extended temperature range (–40°C to +125°C) and automotive qualification. | Validated for under-hood automotive ECUs; higher cost and longer lead times. | Select only when operating ambient exceeds +85°C or AEC-Q100 compliance is mandated. |
Compared with 93LC56B/SN and 93LC56BT-I/P, the 93LC56B/P offers lowest-cost through-hole deployment for industrial control and instrumentation where +85°C max ambient suffices and manual assembly or field repair is preferred.
Availability
93LC56B/P is available at Aetrix Electronics and suitable for motor control configuration, smart meter calibration storage, and industrial PLC I/O mapping requiring stable component supply across multi-year production cycles.
Supply support for 93LC56B/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 microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LC56B/P belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems needing reliable nonvolatile storage with minimal external components and broad voltage compatibility.
FAQ
What is the memory organization of the 93LC56B/P?
The 93LC56B/P has a fixed 128-word × 16-bit (2 Kbit) organization. Unlike 'C' variants, it lacks an ORG pin and is hardwired for x16 operation - eliminating external configuration logic and simplifying interface timing for 16-bit microcontrollers.
Does the 93LC56B/P require an external pull-up resistor on the DO pin?
Yes, the 93LC56B/P DO pin is open-drain during Ready/Busy status reporting and high-impedance during idle or CS low. A 4.7 kΩ pull-up to VCC is required to ensure valid logic-high detection when polling for write completion.
What is the minimum VCC required for reliable operation of the 93LC56B/P?
The 93LC56B/P incorporates internal voltage detection that inhibits all operations below approximately 1.5 V. Reliable read/write functionality begins at 2.5 V, with full AC performance (e.g., 3 MHz clock) specified only at VCC ≥ 4.5 V.
Can the 93LC56B/P be used with a 3.3 V microcontroller without level shifting?
Yes - the 93LC56B/P supports VCC from 2.5 V to 5.5 V and has VIH1 = 2.0 V (min) at VCC ≥ 2.7 V. When powered at 3.3 V, it accepts standard 3.3 V logic levels directly, enabling seamless interface with most 3.3 V MCUs.
How does the 93LC56B/P handle power loss during a write cycle?
The 93LC56B/P includes hardware power-loss protection: if VCC drops below ~1.5 V during erase/write, the internal circuitry aborts the cycle and preserves pre-existing data. No data corruption occurs, though the incomplete operation must be retried after stable power resumes.
93LC56B/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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
93LC56B/P FAQ
1.How can I place an order for 93LC56B/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC56B/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/P reliable?
The price and inventory of 93LC56B/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/P is usually 5 days.
3.What payment methods are accepted for 93LC56B/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC56B/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC56B/P?
93LC56B/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC56B/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/P?
For technical support, including 93LC56B/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC56B/P requirements.
6.How does Aetrix verify that 93LC56B/P is sourced from the original manufacturer or authorized distributors?
All 93LC56B/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/P meets industry standards.
7.What is the process for return or replacement of 93LC56B/P?
All 93LC56B/P units undergo pre-shipment inspection (PSI). If there is an issue with 93LC56B/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/P part is unused and in its original packaging.
Return procedure for 93LC56B/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC56B/P 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…
