My Inquiry
My Account
Microchip Technology 93LC46CT-I/MC
- Part No.:
- 93LC46CT-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
93LC46CT-I/MC.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,265
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93LC46CT-I/MC from Microchip Technology is a 1 Kbit (128 × 8-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 erase-all-before-write-all (ERAL/WRAL), power-on/off data protection, and Ready/Busy status signaling via DO pin - used in microcontroller configuration storage and sensor calibration retention.
For engineers reviewing the 93LC46CT-I/MC datasheet, 93LC46CT-I/MC pinout, 93LC46CT-I/MC application, or 93LC46CT-I/MC equivalent, key selection criteria include voltage compatibility (2.5–5.5 V), 8-bit fixed organization (no ORG pin), DFN-8 (2×3 mm) package footprint, 1 million endurance cycles, and 200-year data retention - critical for embedded systems requiring long-term nonvolatile parameter storage without external logic.
Technical Context
The 93LC46CT-I/MC implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins, supporting opcode-driven commands (READ, WRITE, ERASE, ERAL, WRAL, EWEN/EWDS). Its internal architecture includes an address decoder, data register, mode decode logic, and output buffer, enabling sequential read and status polling during write operations.
It operates exclusively in 8-bit organization ('A' variant), eliminating ORG pin dependency. All programming cycles are self-timed: falling edge of CS initiates erase/write on 93LC devices, and DO provides real-time Ready/Busy feedback when CS is reasserted after ≥250 ns low time (TCSL).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit) - supports compact configuration storage for MCU peripherals or calibration constants. |
| VCC range | 2.5 V to 5.5 V - compatible with 3.3 V and 5 V logic domains without level shifting. |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates in telemetry or firmware parameter logging. |
| Data retention | >200 years at 25°C - ensures long-term reliability in unattended industrial deployments. |
| Write cycle time | 6 ms typical (TWC) - defines minimum interval between successive writes; impacts real-time update latency. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - sets upper bound for serial transaction throughput in host-controlled systems. |
| Standby current | 1 µA (I-temp) - minimizes quiescent power in battery-backed or energy-harvesting applications. |
Pinout & Package
93LC46CT-I/MC is housed in an 8-lead 2×3 mm DFN (Dual Flat No-lead) package with exposed pad, RoHS-compliant matte tin finish. Pin 1 is laser-marked; exposed pad may be connected to VSS or left floating per Microchip packaging spec.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns (TCSL) between instructions to reset internal logic. |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data bits. |
| 3 (DI) | Data Input | Receives Start bit, instruction opcodes, memory addresses, and write data; high-impedance when not selected. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy signal (low = busy); enters High-Z on CS falling edge. |
| 5 (NC) | No Internal Connection | Unbonded pin; must be left floating or tied to VSS per layout guidelines. |
| 6 (ORG) | Organization Select | No internal connection on 'A' variants - device is fixed 8-bit; pin is NC and unused. |
| 7 (VSS) | Ground | Reference for all I/O and internal circuitry; exposed pad may connect here for thermal/electrical performance. |
| 8 (VCC) | Power Supply | Supplies core logic and memory array; internal POR triggers at ~1.5 V (VPOR). |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates need for external timing control - host only monitors DO for completion, simplifying firmware. |
| Automatic ERAL before WRAL | Ensures full array erasure prior to bulk write - prevents data corruption without software intervention. |
| Power-on/off data protection | Hardware lockout below 1.5 V VCC - prevents inadvertent writes during brown-out or power ramp-up. |
| Erase/Write Enable/Disable (EWEN/EWDS) | Explicit command-based write gating - adds software layer of protection against accidental overwrites. |
| Sequential read mode | Enables continuous address increment on DO while CS remains high - reduces command overhead for block reads. |
Applications
| Industrial Sensor Calibration Storage | Microcontroller Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter repository accessed at boot; retains values across power cycles and temperature extremes. Use Value: Enables plug-and-play sensor replacement with zero recalibration; leverages 200-year retention and –40°C to +85°C operation. | Use Scenario: Holding bootloader configuration flags, communication protocol settings, and user-defined I/O mappings in 8-bit MCUs. IC Role / Device Role / Timing Role: Serial configuration store interfaced directly to MCU GPIOs using minimal 3-wire bus. Use Value: Reduces BOM count vs. parallel EEPROM; 6 ms write time allows fast field updates during maintenance mode. |
| Smart Meter Firmware Parameter Tables | Medical Device Safety Settings |
Use Scenario: Storing tariff schedules, pulse constants, and metrology calibration tables in ANSI C12.22-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for revenue-critical parameters; accessed via isolated SPI-to-Microwire bridge. Use Value: 1M endurance supports daily firmware patching; 2.5–5.5 V range matches meter's wide-input DC-DC output. | Use Scenario: Retaining FDA-mandated safety thresholds (e.g., max dose limits, alarm triggers) in portable infusion pumps. IC Role / Device Role / Timing Role: Fail-safe nonvolatile memory with hardware write protection activated at power-on. Use Value: Power-on data lockout (VPOR = 1.5 V) prevents unsafe state loading during cold start; RoHS compliance meets medical directives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46B-I/MC | 128 × 16-bit organization; same VCC, package, and temp grade - requires host to manage 16-bit word alignment. | Used where MCU natively supports 16-bit serial transfers or memory mapping; higher density per access. | Select if system architecture favors 16-bit data path and avoids software bit-packing. |
| AT25010B-MAHL-T | 1 Kbit SPI interface (4-wire), 1.8–5.5 V, SOIC-8 package - different protocol, no ORG pin, but identical 8-bit x128 structure. | Preferred where existing SPI infrastructure exists; lacks Microwire compatibility and DO status pin. | Choose when migrating from legacy Microwire designs to SPI ecosystems or requiring broader voltage support. |
Compared with 93LC46B-I/MC, the 93LC46CT-I/MC offers simpler byte-aligned addressing and eliminates ORG pin routing; versus AT25010B-MAHL-T, it provides hardware Ready/Busy signaling and tighter integration with Microwire-based MCUs - critical for deterministic timing in safety-critical firmware updates.
Availability
93LC46CT-I/MC is available at Aetrix Electronics and suitable for industrial sensor calibration, microcontroller configuration storage, and smart meter parameter retention requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for 93LC46CT-I/MC 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.
The 93LC46 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal pin count and simple firmware integration.
FAQ
What is the memory organization of the 93LC46CT-I/MC?
The 93LC46CT-I/MC is a fixed 128 × 8-bit (1 Kbit) EEPROM - designated as an 'A' variant in Microchip's 93LC46 family. It has no functional ORG pin (marked NC), so it operates exclusively in 8-bit mode. This eliminates external configuration logic and simplifies host interface design compared to 'C' variants that require ORG pin control for x8/x16 selection.
Does the 93LC46CT-I/MC support hardware write protection?
Yes, the 93LC46CT-I/MC includes dual-layer hardware write protection: (1) power-on reset lockout below ~1.5 V VCC (VPOR), and (2) Erase/Write Disable (EWDS) command that disables all programming until an explicit Erase/Write Enable (EWEN) is issued. These features prevent accidental writes during power transitions or firmware errors - essential for maintaining integrity of calibration data stored in the 93LC46CT-I/MC.
What package type is used for the 93LC46CT-I/MC?
The 93LC46CT-I/MC uses an 8-lead 2×3 mm DFN (Dual Flat No-lead) package with exposed thermal pad (suffix 'MC'). It is Pb-free with matte tin finish, and pin 1 is laser-marked. The exposed pad may be connected to VSS for improved thermal dissipation and grounding, or left floating per Microchip's packaging specification DS20001749K.
How does the Ready/Busy status work on the 93LC46CT-I/MC?
The DO pin of the 93LC46CT-I/MC serves dual function: data output during READ, and Ready/Busy indicator during erase/write. After initiating a WRITE or ERASE command, bring CS high for ≥250 ns (TCSL), then sample DO - low indicates ongoing operation, high confirms completion. This polling mechanism eliminates need for fixed delay loops and enables precise timing control in firmware managing the 93LC46CT-I/MC.
What is the maximum clock frequency supported by the 93LC46CT-I/MC?
The 93LC46CT-I/MC supports up to 3 MHz clock frequency when VCC is 4.5 V to 5.5 V. At 2.5 V ≤ VCC < 4.5 V, max clock is 2 MHz; below 2.5 V, it drops to 1 MHz. These limits are defined in AC Characteristics Table 1-2 and ensure reliable setup/hold timing (e.g., TDIS, TDIH) across voltage and temperature ranges - critical for robust communication with the 93LC46CT-I/MC in mixed-signal environments.
93LC46CT-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 6ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
93LC46CT-I/MC FAQ
1.How can I place an order for 93LC46CT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC46CT-I/MC 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 93LC46CT-I/MC reliable?
The price and inventory of 93LC46CT-I/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC46CT-I/MC is usually 5 days.
3.What payment methods are accepted for 93LC46CT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC46CT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC46CT-I/MC?
93LC46CT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC46CT-I/MC 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 93LC46CT-I/MC?
For technical support, including 93LC46CT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC46CT-I/MC requirements.
6.How does Aetrix verify that 93LC46CT-I/MC is sourced from the original manufacturer or authorized distributors?
All 93LC46CT-I/MC 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 93LC46CT-I/MC meets industry standards.
7.What is the process for return or replacement of 93LC46CT-I/MC?
All 93LC46CT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 93LC46CT-I/MC, 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 93LC46CT-I/MC part is unused and in its original packaging.
Return procedure for 93LC46CT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC46CT-I/MC 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…
