My Inquiry
My Account
Microchip Technology 93LC76CT-I/ST
- Part No.:
- 93LC76CT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93LC76CT-I/ST.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,271
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93LC76CT-I/ST from Microchip Technology Inc. is an 8K-bit, low-voltage, serial Microwire-compatible EEPROM with configurable 8-/16-bit word organization via the ORG pin, program enable (PE) write protection, and industrial temperature range (–40°C to +85°C). It operates from 2.5V to 5.5V, supports self-timed erase/write cycles (5 ms typical), and delivers 1 million endurance cycles with >200 years data retention - used in embedded system configuration storage, sensor calibration memory, and power-management parameter backup.
For engineers reviewing the 93LC76CT-I/ST datasheet, 93LC76CT-I/ST pinout, 93LC76CT-I/ST application, or 93LC76CT-I/ST equivalent, key selection considerations include its dual-word-size flexibility (via ORG), hardware write-protection (PE pin), industrial-grade thermal performance, and compatibility with legacy Microwire controllers in space-constrained designs using TSSOP-8 packaging.
Technical Context
The 93LC76CT-I/ST implements a synchronous 3-wire serial interface (CS, CLK, DI/DO) with start-bit detection and opcode-based command execution. Its internal architecture includes address decoding, mode logic, and output buffering, with Ready/Busy status signaled on DO during erase/write operations.
It supports two memory organizations: 1024 × 8-bit (ORG = VSS) or 512 × 16-bit (ORG = VCC), both enabled only when PE = VCC. The device powers up in EWDS (Erase/Write Disable) mode and requires explicit EWEN before programming - ensuring robust immunity against accidental writes during power transitions or noise events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8 Kbit (1024 × 8 or 512 × 16), enabling compact nonvolatile storage for firmware flags, calibration coefficients, or device IDs. |
| Supply Voltage | 2.5V to 5.5V - compatible with 3.3V and 5V systems without level-shifting; POR threshold at 1.5V prevents operation during brown-out. |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - interoperable with legacy microcontrollers lacking SPI hardware but supporting bit-banged timing. |
| Write Cycle Time | 5 ms typical (TWC) - deterministic self-timed erase/write eliminates need for external polling delay timers in host firmware. |
| Endurance & Retention | 1,000,000 erase/write cycles and >200 years data retention at 25°C - suitable for field-updatable systems requiring long service life. |
| Temperature Range | –40°C to +85°C (Industrial grade) - validated for use in industrial controls, automotive body electronics, and outdoor IoT nodes. |
| Package | TSSOP-8 (ST suffix), 3.0 mm × 4.4 mm footprint - surface-mount compatible with automated assembly and high-density PCB layouts. |
Pinout & Package
8-lead Thin Shrink Small Outline Package (TSSOP-8), Pb-free Matte Tin finish, 0.65 mm lead pitch, exposed pad optional (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby (ICCS ≤ 1 µA). |
| 2 CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable mid-sequence without corruption. |
| 3 DI | Data Input | Receives start bit, instruction opcodes, addresses, and write data; shares net with DO in bidirectional configurations (requires series resistor). |
| 4 DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge; requires CS high ≥250 ns to sample status. |
| 5 VSS | Ground | Reference return path for all I/O and core logic; must be low-impedance connection to minimize noise coupling during write cycles. |
| 6 ORG | Memory Organization | Selects 8-bit (VSS) or 16-bit (VCC) word size; must be statically tied - no dynamic reconfiguration during operation. |
| 7 PE | Program Enable | Hardware write lock: PE = VSS disables all erase/write functions; PE = VCC required before EWEN execution. |
| 8 VCC | Power Supply | Core and I/O supply; voltage detect circuit (VPOR = 1.5V) blocks commands below threshold to prevent partial writes. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Word Size (ORG) | Single hardware pin selects between 1024×8-bit or 512×16-bit layout - simplifies migration across 8-bit and 16-bit host architectures without firmware changes. |
| Hardware Write Protection (PE) | Dedicated pin forces full-array write disable when grounded - eliminates risk of corruption from software bugs, ESD glitches, or power transients. |
| Self-Timed Erase/Write | No host timing overhead: internal state machine manages auto-erase before write (ERAL before WRAL), completing in fixed 5 ms - reduces CPU load and code complexity. |
| Ready/Busy Status on DO | Real-time polling capability via DO pin eliminates need for fixed delays or external interrupt lines - enables efficient multi-tasking in RTOS environments. |
| Power-On/Off Data Protection | Internal voltage monitor (VPOR) inhibits all commands until VCC stabilizes above 1.5V and holds writes during brown-out - guarantees data integrity across power cycles. |
Applications
| Industrial Sensor Node | Automotive Body Control Module |
|---|---|
Use Scenario: Storing calibrated offset/gain values for temperature, pressure, and humidity sensors in factory-floor monitoring units. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced to an 8-bit MCU via bit-banged Microwire; retains calibration across power loss. Use Value: Eliminates recalibration after power interruption; ORG pin allows reuse of same firmware across 8-bit sensor interfaces and 16-bit diagnostic loggers. |
Use Scenario: Saving seat position, mirror angle, and lighting preferences in vehicle door modules. IC Role / Device Role / Timing Role: Parameter backup storage accessed during ignition-on initialization; PE pin hardwired to ground to prevent accidental overwrites during CAN bus activity. Use Value: Ensures user settings persist for >15 years; industrial temp rating supports under-dash mounting without derating. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Recording dose history, alarm thresholds, and maintenance logs in battery-backed portable infusion devices. IC Role / Device Role / Timing Role: Secure audit trail memory; powered from 3.3V rail; CS toggled only during scheduled log writes to minimize standby current. Use Value: 1M endurance supports >10 years of daily logging; <1 µA standby current extends battery life between charges. |
Use Scenario: Storing tariff schedules, meter constants, and tamper-event timestamps in ANSI C12.22-compliant utility meters. IC Role / Device Role / Timing Role: Firmware-configurable storage for regulatory-mandated data; accessed via isolated UART-to-Microwire bridge IC. Use Value: Dual-word organization accommodates both 8-bit register maps and 16-bit energy counters; TSSOP-8 fits tight meter PCB real estate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76C-I/ST | Same die, identical electrical specs and pinout; differs only in marking (no 'T' suffix) and potentially traceability coding - functionally interchangeable. | No functional difference; may be used where exact marking compliance is not required by end-customer QA. | Select 93LC76C-I/ST if RoHS-compliant TSSOP-8 delivery is confirmed and marking format flexibility is acceptable. |
| AT25080B-SSHL-B | SPI interface (4-wire), 8K-bit, 2.5–5.5V, but lacks ORG/PE pins; uses W#/HOLD# instead of CS/ORG/PE; no hardware write-lock granularity. | Requires SPI-capable host; cannot replicate hardware-level array-wide write disable or word-size reconfiguration without external logic. | Choose only if migrating to SPI infrastructure; verify firmware rewrite effort for command set and status polling differences. |
Compared with 93LC76C-I/ST, the 93LC76CT-I/ST offers identical functionality with guaranteed traceability marking; versus AT25080B-SSHL-B, it provides superior hardware security (PE pin) and architectural flexibility (ORG) at the cost of Microwire-only controller compatibility.
Availability
93LC76CT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control module design, and medical device parameter storage requiring stable component supply across extended production lifecycles.
Supply support for 93LC76CT-I/ST 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 93LC76CT-I/ST belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems needing reliable nonvolatile storage with minimal pin count and robust data integrity features.
FAQ
What is the function of the ORG pin on the 93LC76CT-I/ST?
The ORG pin on the 93LC76CT-I/ST selects memory organization: tied to VSS for 1024 × 8-bit mode, or to VCC for 512 × 16-bit mode. It is static - must be set at power-on and cannot be changed dynamically. This pin is absent on 'A' and 'B' variants, making the 93LC76CT-I/ST uniquely flexible among the 93LC76 family.
How does the PE pin protect memory on the 93LC76CT-I/ST?
The PE (Program Enable) pin on the 93LC76CT-I/ST must be driven high (VCC) to allow EWEN execution and subsequent erase/write operations. When PE is grounded, all programming functions - including ERASE, WRITE, ERAL, and WRAL - are permanently disabled, providing hardware-level immunity against accidental writes due to software faults or noise.
What is the maximum clock frequency supported by the 93LC76CT-I/ST?
The 93LC76CT-I/ST supports up to 3 MHz clock frequency when VCC ≥ 4.5V, 2 MHz at 2.5V ≤ VCC < 4.5V, and 1 MHz at 1.8V ≤ VCC < 2.5V. These AC limits are specified in Table 1-2 of DS21796M and apply across the full industrial temperature range (–40°C to +85°C).
Does the 93LC76CT-I/ST require external pull-up resistors on its I/O pins?
The 93LC76CT-I/ST does not require external pull-ups on CS, CLK, DI, or DO for basic operation - its inputs meet VIH/VIL thresholds with CMOS-level drivers. However, a series resistor (e.g., 100 Ω) is recommended between DI and DO in shared-bus configurations to prevent bus conflict during the dummy-zero phase of READ commands.
What package type does the 'ST' suffix indicate for the 93LC76CT-I/ST?
The 'ST' suffix in 93LC76CT-I/ST denotes the 8-lead Thin Shrink Small Outline Package (TSSOP), measuring 3.0 mm × 4.4 mm with 0.65 mm lead pitch. This package is RoHS-compliant, Pb-free (Matte Tin finish), and optimized for automated SMT assembly in high-density PCB layouts.
93LC76CT-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8, 512 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- 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-TSSOP
93LC76CT-I/ST FAQ
1.How can I place an order for 93LC76CT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76CT-I/ST 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 93LC76CT-I/ST reliable?
The price and inventory of 93LC76CT-I/ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC76CT-I/ST is usually 5 days.
3.What payment methods are accepted for 93LC76CT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76CT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76CT-I/ST?
93LC76CT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76CT-I/ST 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 93LC76CT-I/ST?
For technical support, including 93LC76CT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76CT-I/ST requirements.
6.How does Aetrix verify that 93LC76CT-I/ST is sourced from the original manufacturer or authorized distributors?
All 93LC76CT-I/ST 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 93LC76CT-I/ST meets industry standards.
7.What is the process for return or replacement of 93LC76CT-I/ST?
All 93LC76CT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76CT-I/ST, 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 93LC76CT-I/ST part is unused and in its original packaging.
Return procedure for 93LC76CT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC76CT-I/ST 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…
