My Inquiry
My Account
Microchip Technology 93LC76CT-E/ST
- Part No.:
- 93LC76CT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93LC76CT-E/ST.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,691
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93LC76CT-E/ST from Microchip Technology is an 8Kbit, low-voltage, serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5V VCC range, industrial and automotive temperature support (−40°C to +125°C), and configurable 8-/16-bit word organization via ORG pin. It features self-timed erase/write cycles, program enable (PE) write protection, and 1 million endurance cycles - used in automotive body control modules for calibration storage.
For engineers reviewing the 93LC76CT-E/ST datasheet, 93LC76CT-E/ST pinout, 93LC76CT-E/ST application, or 93LC76CT-E/ST equivalent, key selection considerations include its dual-word-size flexibility, automotive-grade reliability, PE/ORG pin dependency for configuration, and compatibility with legacy Microwire controllers in space-constrained TSSOP-8 designs.
Technical Context
This device implements a synchronous serial Microwire protocol with CS/CLK/DI/DO signaling and supports both x8 (ORG = 0) and x16 (ORG = 1) memory mapping. Its internal logic includes auto-erase-before-write, ERAL/WRAL bulk operations, and Ready/Busy status polling via DO pin during programming.
Power management integrates POR detection (1.5V threshold), standby current ≤5 µA, and write-current optimization: 3 mA typical at 2.5V/2 MHz. The PE pin must be held high to enable erase/write; floating PE is prohibited and disables all programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8 or 512 × 16) |
| VCC operating range | 2.5 V to 5.5 V - supports wide-input automotive power rails without external regulation |
| Endurance | 1,000,000 erase/write cycles - enables frequent firmware parameter updates in telematics units |
| Data retention | 200 years at 25°C - ensures calibration data integrity over full vehicle lifecycle |
| Max clock frequency | 3 MHz at VCC ≥4.5 V - permits fast boot-time configuration loading |
| Write cycle time | 5 ms typical (TWC) - defines minimum delay between successive writes in real-time control loops |
| Temperature grade | Automotive (E): −40°C to +125°C - qualified for under-hood and ADAS sensor module deployment |
Pinout & Package
93LC76CT-E/ST is housed in an 8-lead TSSOP package (ST suffix), with lead pitch 0.65 mm and body dimensions 4.4 mm × 3.0 mm × 1.2 mm. Pin 1 marked by laser dot; RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must remain low ≥250 ns between instructions to reset internal state |
| CLK | Serial Clock | Rising-edge synchronized I/O; clocking may pause mid-transfer without corruption |
| DI | Data Input | Accepts Start bit, opcode, address, and data; requires pull-down on CS per datasheet guidance |
| DO | Data Output / Status | Tri-state output: delivers read data or Ready/Busy (low = busy) during erase/write |
| VSS | Ground | Reference for all I/O and internal logic; connects to PCB ground plane |
| ORG | Organization select | High = x16 mode; low = x8 mode; must be hardwired - no floating allowed |
| PE | Program Enable | High = write enabled; low = full array write-protection - mandatory for functional safety compliance |
| VCC | Power supply | 2.5–5.5 V input; internal POR circuit blocks operation below 1.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Word-size configurability | Hardware-selectable 8-bit or 16-bit access via ORG pin - eliminates need for software byte-swapping in mixed-data systems |
| Hardware write protection | Dedicated PE pin enforces system-level lockout of memory writes - critical for ASIL-B functional safety architectures |
| Self-timed erase/write | No external timing components required; internal state machine handles auto-erase before write - simplifies host controller firmware |
| Ready/Busy polling | DO pin doubles as status indicator during programming - enables non-blocking host operation without fixed delays |
| Automotive qualification | Rated −40°C to +125°C with AEC-Q100 alignment - validated for engine control, lighting, and gateway ECUs |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim values and misfire counters across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with guaranteed retention during battery disconnect. Use Value: Enables closed-loop learning without external backup power; PE pin prevents corruption during ECU reset sequences. | Use Scenario: Holding camera calibration offsets and radar beamforming coefficients in parking assist modules. IC Role / Device Role / Timing Role: Configuration memory accessed at startup and updated during factory recalibration. Use Value: ORG pin allows 16-bit coefficient storage matching sensor DSP word width, reducing read overhead. |
| Body Control Module (BCM) | Infotainment Head Unit |
Use Scenario: Retaining user preferences (seat position, mirror angle, lighting themes) after vehicle power-down. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to 8-bit microcontroller via Microwire. Use Value: 5 µA standby current extends battery life in always-on wake-up circuits; TSSOP-8 footprint fits tight BCM layouts. | Use Scenario: Storing audio equalizer presets and Bluetooth pairing keys across firmware updates. IC Role / Device Role / Timing Role: Secure configuration store isolated from main application flash. Use Value: WRAL instruction enables atomic full-array reinitialization during factory reset - no partial-write corruption risk. |
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 | Industrial temp grade (−40°C to +85°C); same pinout, ORG/PE functionality, and electrical specs | Not qualified for under-hood or ADAS use; suitable for cabin electronics only | Select when automotive qualification is unnecessary and cost sensitivity is higher |
| AT25DF041A-SSH-T | SPI interface (4-wire), 4 Mbit density, sector erase, no ORG/PE pins; requires different driver stack | Higher density but lacks hardware write protection and word-size flexibility | Choose for SPI-based platforms needing larger storage; not drop-in compatible |
Compared with 93LC76C-I/ST, the 93LC76CT-E/ST adds automotive temperature validation and tighter AC timing specs at high VCC; versus AT25DF041A-SSH-T, it retains Microwire simplicity and hardware-configurable word size but trades off density and sector-level erase granularity.
Availability
93LC76CT-E/ST is available at Aetrix Electronics and suitable for automotive control units, ADAS sensor modules, and body electronics requiring stable component supply with long-term lifecycle assurance.
Supply support for 93LC76CT-E/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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona.
The 93LC76 series belongs to Microchip's legacy Microwire-compatible EEPROM product line, designed specifically for cost-sensitive, space-constrained automotive and industrial systems requiring robust nonvolatile storage with minimal interface overhead.
FAQ
What is the function of the ORG pin on the 93LC76CT-E/ST?
The ORG pin on the 93LC76CT-E/ST selects memory word size: tied high (to VCC), it configures the device for 512 × 16-bit organization; tied low (to VSS), it selects 1024 × 8-bit organization. This hardware-selectable mode eliminates software configuration overhead and ensures deterministic addressing - a key requirement in safety-critical automotive firmware using the 93LC76CT-E/ST.
How does the PE pin affect write operations in the 93LC76CT-E/ST?
The PE (Program Enable) pin on the 93LC76CT-E/ST must be driven high to permit any erase or write operation; if held low, all programming functions - including ERAL, WRAL, WRITE, and EWEN - are disabled. This hardware-level write lock is mandatory for functional safety compliance and prevents accidental corruption during power transients - a design feature explicitly required in systems using the 93LC76CT-E/ST.
What is the maximum clock frequency supported by the 93LC76CT-E/ST at 3.3V VCC?
At VCC = 3.3 V, the 93LC76CT-E/ST supports a maximum clock frequency of 2 MHz, as specified in Table 1-2 (A1) of DS21796M. This limit ensures reliable setup/hold timing margins for DI and DO signals and applies across the full automotive temperature range (−40°C to +125°C). Exceeding 2 MHz at 3.3 V risks command loss or data corruption in the 93LC76CT-E/ST.
Does the 93LC76CT-E/ST require an external pull-up resistor on the DO pin?
No, the 93LC76CT-E/ST does not require an external pull-up on the DO pin. Its DO output is actively driven high or low during read/status phases and enters High-Z state otherwise. However, if DI and DO are shorted (shared bus), a current-limiting resistor (e.g., 10 kΩ) is recommended between them to prevent bus conflict when A0 = high - a condition documented in Section 2.2 for the 93LC76CT-E/ST.
What is the purpose of the EWEN and EWDS commands in the 93LC76CT-E/ST instruction set?
The EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) commands in the 93LC76CT-E/ST provide software-controlled write gating: the device powers up in EWDS mode, blocking all programming until EWEN is issued; after programming, issuing EWDS relocks the array. This two-step protocol prevents accidental writes during noise events - a critical safeguard implemented in every 93LC76CT-E/ST deployment.
93LC76CT-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
93LC76CT-E/ST FAQ
1.How can I place an order for 93LC76CT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76CT-E/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-E/ST reliable?
The price and inventory of 93LC76CT-E/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-E/ST is usually 5 days.
3.What payment methods are accepted for 93LC76CT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76CT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76CT-E/ST?
93LC76CT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76CT-E/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-E/ST?
For technical support, including 93LC76CT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76CT-E/ST requirements.
6.How does Aetrix verify that 93LC76CT-E/ST is sourced from the original manufacturer or authorized distributors?
All 93LC76CT-E/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-E/ST meets industry standards.
7.What is the process for return or replacement of 93LC76CT-E/ST?
All 93LC76CT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76CT-E/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-E/ST part is unused and in its original packaging.
Return procedure for 93LC76CT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93LC76CT-E/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…
