My Inquiry
My Account
Microchip Technology 93C76CT-E/ST
- Part No.:
- 93C76CT-E/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93C76CT-E/ST.pdf
- Description:
- IC EEPROM 8KBIT MICROWIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,510
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
93C76CT-E/ST from Microchip Technology Inc. is an 8Kbit, 4.5–5.5V serial EEPROM with 8-bit organization (fixed, no ORG pin), industrial/automotive temperature range (–40°C to +125°C), and Microwire-compatible 3-wire interface. It features self-timed erase/write cycles, 1M endurance, >200-year data retention, and Program Enable (PE) pin for full-array write protection - deployed in automotive body control modules for calibration storage.
For engineers reviewing the 93C76CT-E/ST datasheet, 93C76CT-E/ST pinout, 93C76CT-E/ST application, or 93C76CT-E/ST equivalent, key selection considerations include its 5ms program cycle time at 4.5–5.5V, PE-driven hardware write-protection, automotive-grade reliability, and TSSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
This device implements a synchronous Microwire-compatible serial interface with CS/CLK/DI/DO signals and dedicated PE/ORG pins (though ORG is unused in 'A'/'B' variants like 93C76A/B). It uses internal auto-erase-before-write logic and supports ERAL/WRAL commands for bulk operations - all initiated by rising-edge clocked opcodes.
Power-on reset circuitry disables programming below VCC = 3.8V; Ready/Busy status is polled via DO pin during erase/write cycles, requiring ≥250 ns CS low time before status sampling. The PE pin must be held high to enable any write operation - a hardwired security feature absent in non-'C' variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (1024 × 8-bit fixed organization) |
| VCC operating range | 4.5 V to 5.5 V - mandates stable 5V rail; no low-voltage operation |
| Endurance | 1,000,000 erase/write cycles - supports frequent firmware parameter updates |
| Data retention | Greater than 200 years at 85°C - suitable for automotive lifetime requirements |
| Program cycle time | 2 ms (TWC) - enables fast field calibration writes without system timeout issues |
| Temperature grade | Automotive (E): –40°C to +125°C - qualified for under-hood and powertrain ECUs |
| Interface protocol | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage on microcontrollers |
Pinout & Package
93C76CT-E/ST is supplied in an 8-lead TSSOP package (ST suffix), measuring 3.0 mm × 4.4 mm × 1.1 mm, with exposed pad optional grounding. Pin 1 is marked by laser dot; pin 1 ID corner is top-left when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state |
| 2 (CLK) | Serial Clock | Rising-edge synchronized I/O; stops freely during transmission; not required during self-timed write |
| 3 (DI) | Data Input | Accepts Start bit, opcode, address, and data; tied high with pull-up for Start detection |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| 5 (VSS) | Ground | Reference for all I/O and internal logic; connect to system ground plane |
| 6 (PE) | Program Enable | Must be driven high to allow any erase/write; tied low to permanently disable programming |
| 7 (ORG) | Organization select | Not used in 93C76A/B - internally fixed to 8-bit; leave unconnected or tie to VSS/VCC per layout |
| 8 (VCC) | Power supply | 4.5–5.5 V only; internal POR triggers at ~3.8 V - prevents corruption during brownout |
Key Features
| Feature | Design Value |
|---|---|
| Hardware write protection via PE pin | Prevents accidental overwrites in automotive environments where ECU resets may occur mid-write |
| Self-timed erase/write with auto-erase | Eliminates need for external timing control - simplifies firmware and reduces CPU overhead |
| Ready/Busy polling via DO pin | Enables non-blocking operation: host continues other tasks while EEPROM executes internal cycle |
| ERAL and WRAL bulk commands | Supports full-array erase (6 ms) or full-array write (15 ms) - critical for OTA firmware recovery |
| Power-on/off data protection | Internal circuitry inhibits writes below 3.8 V - ensures data integrity during power ramp-up/down |
Applications
| Automotive Body Control Unit (BCU) | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing seat position presets, mirror angles, and lighting profiles across vehicle lifecycle. IC Role / Device Role / Timing Role: Nonvolatile parameter memory interfaced to 8-bit MCU via Microwire; accessed during ignition-on initialization. Use Value: 125°C rating ensures reliability near HVAC ducts; PE pin prevents corruption during battery voltage dips. |
Use Scenario: Retaining I/O mapping, scaling factors, and alarm thresholds after power loss in factory automation controllers. IC Role / Device Role / Timing Role: Serial configuration EEPROM sharing SPI-like bus with ADCs and DACs; read at boot, written during commissioning. Use Value: 2 ms write time enables fast setup; >200-year retention eliminates recalibration schedules. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Holding flow-rate calibration coefficients and safety limits updated during service calibration. IC Role / Device Role / Timing Role: Secure, tamper-resistant memory accessed only via authenticated service mode; PE pin grounded during normal operation. Use Value: Hardware write-disable prevents unauthorized changes; 1M endurance supports 10+ years of biannual calibrations. |
Use Scenario: Storing signed firmware patches downloaded over PLC or RF link for field updates. IC Role / Device Role / Timing Role: Dedicated patch storage partition erased/written atomically using WRAL command before validation. Use Value: 15 ms WRAL cycle enables rapid patch application; automotive temp grade ensures outdoor meter reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93C76AT-E/ST | No PE pin; write-enable always active; same 8-bit organization and TSSOP-8 package | Lacks hardware write protection - requires software-only lock mechanisms | Select when cost sensitivity outweighs need for hardware-level write disable |
| AT25DF041A-SSH-T | SPI interface (4-wire), 4 Mbit density, 2.7–3.6 V operation, no PE pin | Higher density but incompatible voltage and protocol; requires MCU SPI peripheral | Choose only if migrating to SPI architecture and needing >8 Kbit capacity |
Compared with 93C76AT-E/ST, the 93C76CT-E/ST adds critical hardware write protection via PE; versus AT25DF041A-SSH-T, it maintains Microwire compatibility and automotive 5V operation but trades density for protocol continuity and voltage robustness.
Availability
93C76CT-E/ST is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device calibration storage requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 93C76CT-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 microcontroller, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx series targets cost-sensitive, high-reliability nonvolatile memory applications in automotive and industrial markets, emphasizing hardware-enabled data integrity, wide temperature operation, and Microwire protocol simplicity.
FAQ
What is the function of the PE pin on the 93C76CT-E/ST?
The PE (Program Enable) pin on the 93C76CT-E/ST must be driven high to permit any erase or write operation; tying it low permanently disables programming. This hardware-level protection is unique to 'C'-suffix variants and prevents accidental overwrites during power transients or firmware faults - a key requirement in automotive ECUs where the 93C76CT-E/ST is commonly deployed.
Does the 93C76CT-E/ST support 16-bit memory organization?
No, the 93C76CT-E/ST is a fixed 8-bit organization device ('A' variant), with no functional ORG pin. Unlike 93C76C parts, its ORG pin is present but unused - internal logic fixes word size to 1024 × 8-bit. The 'T' in the part number denotes TSSOP packaging, and 'E' confirms automotive temperature qualification (–40°C to +125°C).
What is the minimum VCC required for reliable operation of the 93C76CT-E/ST?
The 93C76CT-E/ST requires VCC ≥ 4.5 V for full specification compliance, and its internal power-on reset circuitry inhibits all programming below ~3.8 V. Operation below 4.5 V is not guaranteed - unlike 93AA76A or 93LC76A variants, this part has no low-voltage capability. Systems must ensure stable 5V supply before initiating any 93C76CT-E/ST communication.
How does the Ready/Busy status work on the 93C76CT-E/ST?
During erase or write cycles, the DO pin of the 93C76CT-E/ST outputs Ready/Busy status: logic low indicates ongoing internal operation, logic high signals completion. To sample status, CS must be brought high for ≥250 ns after being low - then DO is sampled on CLK rising edges. After completion, issuing a Start bit followed by CS low clears the status flag.
Can the 93C76CT-E/ST be used as a drop-in replacement for the 93C76AT-E/ST?
No - although both share the same TSSOP-8 package and 8-bit organization, the 93C76CT-E/ST includes a functional PE pin that must be actively driven high for writes, whereas the 93C76AT-E/ST lacks PE and enables writes by default. Replacing one with the other requires PCB-level modification to route and control the PE signal, making them not pin-compatible.
93C76CT-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:
- 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-TSSOP
93C76CT-E/ST FAQ
1.How can I place an order for 93C76CT-E/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C76CT-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 93C76CT-E/ST reliable?
The price and inventory of 93C76CT-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 93C76CT-E/ST is usually 5 days.
3.What payment methods are accepted for 93C76CT-E/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C76CT-E/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C76CT-E/ST?
93C76CT-E/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C76CT-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 93C76CT-E/ST?
For technical support, including 93C76CT-E/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C76CT-E/ST requirements.
6.How does Aetrix verify that 93C76CT-E/ST is sourced from the original manufacturer or authorized distributors?
All 93C76CT-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 93C76CT-E/ST meets industry standards.
7.What is the process for return or replacement of 93C76CT-E/ST?
All 93C76CT-E/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93C76CT-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 93C76CT-E/ST part is unused and in its original packaging.
Return procedure for 93C76CT-E/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93C76CT-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…
