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Microchip Technology AT27C4096-15JI
- Part No.:
- AT27C4096-15JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C4096-15JI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,201
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Product details
Overview
AT27C4096-15JI from Atmel is a 4-Mbit (256K × 16) one-time programmable EPROM designed for firmware storage in 16-/32-bit microprocessor systems, featuring 150 ns read access time, 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports two-line control (CE/OE), delivers 40 mA active current at 5 MHz, and uses CMOS/TTL-compatible I/O.
For engineers reviewing the AT27C4096-15JI datasheet, AT27C4096-15JI pinout, AT27C4096-15JI application, or AT27C4096-15JI equivalent, key selection criteria include OTP reliability, JEDEC-standard PLCC-44 packaging, rapid 50 µs/word programming, integrated product identification code, and compatibility with legacy 27C-series EPROM sockets.
Technical Context
The AT27C4096-15JI implements a by-16 organization with 18 address lines (A0–A17) enabling direct word-level access without byte masking. Its dual-control architecture (CE and OE) eliminates bus contention during high-speed read cycles, and it operates exclusively in 5V mode-no VPP required for read, but 12.0 V ±0.5 V applied to VPP during programming.
It integrates Rapid™ Programming Algorithm with automatic verify-reprogram loops per word, and embeds manufacturer/device identification codes accessible via A9 voltage modulation (12 V) and A0 toggling. ESD protection is rated at 2,000 V, and latchup immunity exceeds 200 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (256K × 16 words) - supports full 16-bit data bus interface without external multiplexing |
| Read Access Time | 150 ns max - eliminates WAIT states in 6–7 MHz CPU systems using standard timing margins |
| Supply Voltage | 5 V ±10% - compatible with legacy TTL/CMOS logic rails; no auxiliary voltage rails needed for read operation |
| Active Current | 40 mA max at 5 MHz - enables stable operation in multi-device memory arrays with shared power distribution |
| Standby Current | 100 µA max - reduces quiescent power in battery-backed or low-power hold modes |
| Programming Speed | 50 µs/word typical - cuts firmware update time by >90% vs. legacy 27C2048 (250 µs/word) |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, motor drives, and embedded instrumentation environments |
| ESD/Latchup | 2,000 V HBM ESD; 200 mA latchup immunity - ensures robustness in manual handling and noisy factory environments |
Pinout & Package
AT27C4096-15JI is supplied in a 44-lead plastic J-leaded chip carrier (PLCC) package per JEDEC MS-018 AC, with 16 output pins (O0–O15), 18 address inputs (A0–A17), dual enable controls (CE, OE), dedicated VPP programming pin, and dual GND pins requiring connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus interface; fully decoded to select one of 256K words; A0–A17 must be stable before CE/OE assertion |
| O0–O15 | Data Outputs | 16-bit bidirectional data bus outputs; high-impedance when CE or OE is inactive; drive TTL/CMOS loads directly |
| CE | Chip Enable | Primary device select; must be low to enable internal array access; controls power state transition between standby and active |
| OE | Output Enable | Secondary output gate; allows data bus sharing without contention; float occurs within 35 ns of OE high |
| VPP | Programming Voltage | 12.0 V ±0.5 V input during programming only; disconnected or tied to VCC during read; requires local 0.1 µF decoupling |
| GND (Pins 12 & 30) | Ground Reference | Both pins must be connected to system ground plane; failure causes timing violations and increased noise susceptibility |
| NC (Pins 13 & 27) | No Connect | Internally unconnected; must remain floating-no pull-up/down or routing allowed |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with auto-verify loop; reduces firmware burn time from minutes to seconds |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F4h) readable via A9=12 V and A0 toggle; enables automated programmer validation |
| Two-Line Control Architecture | Independent CE and OE inputs eliminate bus contention in multi-device memory maps and simplify timing closure |
| JEDEC-Standard PLCC-44 Packaging | Drop-in replacement for AT27C2048-15JC/PI in existing PLCC sockets; same footprint, pinout, and thermal profile |
| High-Reliability OTP Structure | 2,000 V ESD protection and 200 mA latchup immunity ensure field reliability in industrial assembly and deployment |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Instrumentation Boot ROM |
|---|---|
Use Scenario: Storing fixed firmware for programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Non-volatile boot ROM providing deterministic startup sequence and real-time control code execution without mass-storage latency. Use Value: 150 ns access time enables direct execution from memory on 6–7 MHz MCUs; industrial temp rating ensures uptime across –40°C to +85°C ambient. |
Use Scenario: Replacing obsolete EPROMs in calibrated test equipment requiring long-term firmware stability and zero runtime volatility. IC Role / Device Role / Timing Role: One-time programmable read-only memory holding calibration constants, self-test routines, and UI logic for benchtop instruments. Use Value: Integrated ID code allows automated verification during production programming; 256K × 16 organization matches legacy 16-bit bus interfaces without glue logic. |
| Motor Drive Microcontroller Bootloader | Avionics Subsystem Configuration Memory |
Use Scenario: Hosting bootloader code for brushless DC motor controllers where firmware integrity must survive repeated power cycling and EMI exposure. IC Role / Device Role / Timing Role: OTP EPROM storing verified startup firmware that initializes PWM peripherals, ADCs, and communication interfaces prior to main application load. Use Value: 40 mA active current and 100 µA standby support efficient power sequencing; 200 mA latchup immunity prevents failure during motor switching transients. |
Use Scenario: Storing configuration tables and safety-critical initialization parameters in airborne computing modules subject to DO-254 design assurance. IC Role / Device Role / Timing Role: Radiation-tolerant (non-flash) non-volatile memory holding flight control lookup tables and hardware revision identifiers. Use Value: No wear-out mechanism or write disturb; guaranteed data retention >20 years; JEDEC PLCC package supports conformal coating and mechanical shock resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-15JI | 2-Mbit (128K × 16); identical PLCC-44 package, pinout, and timing; 75 ns faster access (150 ns vs. 225 ns) | Lower density; suitable where firmware fits in 256 KB and board layout cannot accommodate larger memory footprint | Select when cost sensitivity outweighs future firmware expansion needs; retains same programming workflow and socket compatibility |
| AM27C4096-15JC | Same 4-Mbit density and 150 ns speed; AMD-manufactured; PLCC-44 package; minor differences in VPP tolerance (12.0 V ±0.5 V vs. 12.5 V ±0.5 V) | Identical functional role; validated in same industrial control reference designs; slightly higher VPP margin improves programming yield in marginal supplies | Choose for second-source assurance in long-lifecycle programs; requires no PCB or firmware changes |
Compared with AT27C2048-15JI, the AT27C4096-15JI doubles firmware capacity without altering board layout or timing margins; versus AM27C4096-15JC, it offers tighter VPP regulation and broader OEM qualification history in avionics and industrial automation.
Availability
AT27C4096-15JI is available at Aetrix Electronics and suitable for industrial PLCs, legacy instrumentation, and motor drive systems requiring stable component supply, long-term obsolescence management, and JEDEC-standard PLCC compatibility.
Supply support for AT27C4096-15JI 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
Atmel Corporation was a U.S.-based semiconductor company specializing in microcontrollers, non-volatile memory, and programmable logic, acquired by Microchip Technology in 2016.
The AT27C4096 belongs to Atmel's 27C-series OTP EPROM family, engineered for drop-in replacement of earlier EPROM densities in industrial, automotive, and telecom infrastructure where firmware immutability and long-term data retention are critical.
FAQ
What is the maximum read access time specified for AT27C4096-15JI?
The AT27C4096-15JI has a maximum read access time of 150 ns under industrial temperature conditions (–40°C to +85°C) and 5V ±10% supply. This value is guaranteed across the full operating range and is measured from address valid or CE/OE assertion to valid data output, ensuring compatibility with 6–7 MHz microprocessor buses without WAIT-state insertion.
Does AT27C4096-15JI require VPP voltage during normal read operation?
No, AT27C4096-15JI operates in standard 5V read mode with VPP tied to VCC or left unconnected; VPP is only required during programming at 12.0 V ±0.5 V. The datasheet explicitly states VPP must be applied simultaneously with or after VCC-and removed simultaneously with or before VCC-to prevent latchup or data corruption.
Can AT27C4096-15JI be used as a direct replacement for AT27C2048-15JI on the same PCB?
Yes, AT27C4096-15JI uses the identical 44-lead PLCC package, pinout, and electrical interface as AT27C2048-15JI, making it a mechanical and functional drop-in upgrade. Both share the same CE/OE control scheme, 5V supply, and industrial temperature rating-only firmware size increases from 2 Mbit to 4 Mbit.
What is the purpose of the Integrated Product Identification Code in AT27C4096-15JI?
The Integrated Product Identification Code in AT27C4096-15JI provides electronic manufacturer (001Eh) and device type (00F4h) identification via A9 and A0 pins during special read mode. This enables automated programming equipment to validate part authenticity and select correct algorithms-critical for high-yield manufacturing and counterfeit mitigation.
How does the Rapid™ Programming Algorithm improve production efficiency for AT27C4096-15JI?
The Rapid™ Programming Algorithm reduces AT27C4096-15JI programming time to 50 µs per word with built-in verify-reprogram loops, cutting total 256K-word burn time to under 15 seconds. This eliminates manual reprogramming passes and significantly accelerates firmware release cycles in high-mix manufacturing environments.
AT27C4096-15JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 4Mbit
- Memory Organization:
- 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 150 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT27C4096-15JI FAQ
1.How can I place an order for AT27C4096-15JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C4096-15JI 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 AT27C4096-15JI reliable?
The price and inventory of AT27C4096-15JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C4096-15JI is usually 5 days.
3.What payment methods are accepted for AT27C4096-15JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C4096-15JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C4096-15JI?
AT27C4096-15JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C4096-15JI 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 AT27C4096-15JI?
For technical support, including AT27C4096-15JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C4096-15JI requirements.
6.How does Aetrix verify that AT27C4096-15JI is sourced from the original manufacturer or authorized distributors?
All AT27C4096-15JI 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 AT27C4096-15JI meets industry standards.
7.What is the process for return or replacement of AT27C4096-15JI?
All AT27C4096-15JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C4096-15JI, 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 AT27C4096-15JI part is unused and in its original packaging.
Return procedure for AT27C4096-15JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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