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Microchip Technology AT27C4096-70JI
- Part No.:
- AT27C4096-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C4096-70JI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,730
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Product details
Overview
AT27C4096-70JI from Atmel is a 4-Mbit (256K × 16) one-time programmable EPROM optimized for high-performance 16-/32-bit microprocessor systems, featuring 70 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 Rapid™ programming (50 µs/word typical).
For engineers reviewing the AT27C4096-70JI datasheet, AT27C4096-70JI pinout, AT27C4096-70JI application, or AT27C4096-70JI equivalent, key selection criteria include its OTP reliability, JEDEC-standard PLCC-44 packaging, CMOS/TTL compatibility, low 100 µA standby current, and direct upgrade path from AT27C516/AT27C1024/AT27C2048.
Technical Context
The AT27C4096-70JI implements a by-16 organization with full address decoding across A0–A17, enabling single-word random access without WAIT states. Its dual-control architecture (CE and OE) eliminates bus contention in high-speed systems, while integrated product identification code (via A9/VH and A0 toggling) enables automated programming equipment recognition.
It operates exclusively in 5V read mode but requires VPP = 12.0 ± 0.5V during programming, with strict sequencing (VCC applied before/removed after VPP). The device features 2,000V ESD protection and 200 mA latchup immunity, confirming robustness for industrial embedded firmware storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304-bit (256K × 16) OTP EPROM - supports 16-bit data bus interface without external multiplexing. |
| Read Access Time | 70 ns max - eliminates WAIT states in 16-/32-bit microprocessor systems running ≤14 MHz. |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage required for read operation. |
| Standby Current | 100 µA max - enables low-power firmware retention in battery-backed or energy-sensitive industrial controllers. |
| Active Current | 40 mA max at 5 MHz - defines thermal budget for dense EPROM arrays on PCBs with shared 5V rail. |
| Programming Speed | 50 µs/word typical - reduces firmware update cycle time in production programming stations. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded applications including motor drives and PLC modules. |
| ESD/Latchup | 2,000V HBM ESD / 200 mA latchup immunity - ensures survivability during handling and system-level transients. |
Pinout & Package
AT27C4096-70JI is supplied in a 44-lead plastic J-leaded chip carrier (PLCC) package per JEDEC MS-018 AC, with 1.27 mm pitch and 16.7 mm × 16.7 mm body size. Both GND pins must be connected for stable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 256K-word addressing space; all 18 lines required for full memory access. |
| O0–O15 | Data Outputs | True 16-bit parallel output bus; CMOS/TTL-compatible drive strength (IOL = 2.1 mA, IOH = -400 µA). |
| CE | Chip Enable | Active-low primary enable; controls power state transition between standby (VIH) and active (VIL). |
| OE | Output Enable | Active-low secondary control; gates output drivers independently of CE to manage bus contention. |
| VPP | Programming Voltage | 12.0 ± 0.5V input required only during programming; must be sequenced after VCC and before removal. |
| VCC | Power Supply | 5V ±10% main supply; powers logic and outputs during read; supplies ICC2 (50 mA) during programming. |
| GND (Pins 23 & 32) | Ground Reference | Two dedicated ground pins required for noise suppression and current return path integrity. |
| NC (Pins 7, 22, 43) | No Connect | Internally unconnected; must remain floating - not tied to VCC, GND, or signals. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with auto-verify loop - cuts firmware burn time vs. legacy EPROMs by >90%. |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F4h) readable via A9/VH and A0 toggle - enables plug-and-play programming tool detection. |
| Two-Line Control Architecture | Independent CE and OE inputs - allows precise timing control to prevent bus conflicts in multi-device memory subsystems. |
| JEDEC-Standard Packaging | 44J PLCC package - ensures mechanical and solder-reflow compatibility with existing industrial PCB assembly processes. |
| High-Reliability Process | 2,000V ESD protection and 200 mA latchup immunity - meets IEC 61000-4-2 Level 4 and JEDEC JESD78 requirements. |
| Direct Upgrade Path | Pin- and software-compatible replacement for AT27C516 (512K), AT27C1024 (1M), and AT27C2048 (2M) - simplifies memory density migration. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot ROM |
|---|---|
|
Use Scenario: Storing fixed ladder logic and I/O configuration in DIN-rail mounted programmable logic controllers operating in factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Non-volatile boot-time firmware repository accessed sequentially during cold start and randomly during runtime diagnostics. Use Value: 70 ns access time enables deterministic scan-cycle execution; industrial temp rating ensures uptime in unconditioned control cabinets. |
Use Scenario: Providing immutable BIOS/bootloader code for 1990s-era industrial computers using 80386/80486 CPUs where flash memory was unreliable or unavailable. IC Role / Device Role / Timing Role: Primary read-only instruction store mapped into CPU's upper memory region (e.g., F0000h–FFFFFh), accessed via 16-bit data bus. Use Value: By-16 organization matches x86 16-bit external data bus; 5V-only read operation avoids complex voltage translation circuitry. |
| Military Avionics Configuration Memory | Test Equipment Calibration Data Storage |
|
Use Scenario: Holding flight-critical configuration tables (e.g., sensor scaling factors, actuator limits) in airborne mission computers requiring long-term data integrity without refresh. IC Role / Device Role / Timing Role: OTP-configured parameter bank read once per power-on reset and cached in RAM for runtime use. Use Value: One-time programmability prevents accidental overwrite; 2,000V ESD rating withstands static discharge in dry cabin environments. |
Use Scenario: Storing factory-calibrated coefficients and linearity correction maps in automated test equipment (ATE) used for semiconductor wafer probing. IC Role / Device Role / Timing Role: High-reliability lookup table accessed during self-test sequences prior to DUT measurement cycles. Use Value: 40 mA active current at 5 MHz supports burst-read calibration data fetch without overheating in densely packed ATE backplanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-70JI | 2-Mbit (128K × 16), same 70 ns speed, identical PLCC-44 package and pinout. | Half the capacity; suitable when firmware fits within 256K words and board layout rework is prohibited. | Select when legacy design uses AT27C2048 and only incremental firmware growth justifies upgrade. |
| AM27C4096-70JC | Functionally identical 4-Mbit OTP EPROM, but offered in commercial temp range (0°C to 70°C) and PDIP-40 package. | Lacks industrial temperature qualification; PDIP footprint incompatible with AT27C4096-70JI's PLCC-44 layout. | Choose only for cost-sensitive commercial applications where industrial temp rating and PLCC form factor are unnecessary. |
Compared with AT27C2048-70JI, the AT27C4096-70JI doubles firmware capacity without changing timing or interface; versus AM27C4096-70JC, it trades commercial temperature grade and PDIP for industrial qualification and surface-mount PLCC - critical for ruggedized designs.
Availability
AT27C4096-70JI is available at Aetrix Electronics and suitable for industrial PLCs, legacy embedded boot systems, avionics configuration modules, and automated test equipment requiring stable component supply over extended production lifecycles.
Supply support for AT27C4096-70JI 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 (now part of Microchip Technology) is a fabless semiconductor company specializing in microcontrollers, non-volatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27C4096 belongs to Atmel's OTP EPROM product line, designed specifically to replace UV-erasable EPROMs with higher reliability, faster programming, and simplified system integration in firmware-critical embedded systems.
FAQ
What is the operating temperature range for AT27C4096-70JI?
The AT27C4096-70JI is rated for industrial temperature operation from -40°C to +85°C. This specification is confirmed in the Ordering Information table on page 9 of the datasheet, where the "-JI" suffix explicitly denotes the industrial grade. The device undergoes full characterization across this range for parameters including tACC, ICC, and ISB.
Does AT27C4096-70JI require a programming voltage during normal read operation?
No, AT27C4096-70JI requires only a 5V ±10% supply (VCC) for normal read operation. VPP (12.0 ± 0.5V) is needed exclusively during programming and product identification modes, as defined in the Operating Modes table on page 3. During read, VPP may be tied to VCC or left unconnected per system design.
Is AT27C4096-70JI pin-compatible with AT27C2048-70JI?
Yes, AT27C4096-70JI and AT27C2048-70JI share identical PLCC-44 pinouts, signal definitions, and DC/AC timing specifications (70 ns access), making them drop-in replacements where firmware size permits. Pin functions A0–A17, O0–O15, CE, OE, VCC, VPP, GND, and NC locations match exactly per the Pin Configurations diagrams on pages 1–2.
What is the purpose of the Integrated Product Identification Code in AT27C4096-70JI?
The Integrated Product Identification Code in AT27C4096-70JI provides manufacturer (001Eh) and device type (00F4h) codes readable via A9 and A0 under VPP = 12V, enabling automatic algorithm selection in industry-standard programmers. This feature eliminates manual part selection errors and ensures correct voltage and pulse-width application during programming of AT27C4096-70JI.
How does the Rapid™ Programming Algorithm improve efficiency for AT27C4096-70JI?
The Rapid™ Programming Algorithm reduces AT27C4096-70JI programming time to 50 µs per word (typical), verified in the DC Programming Characteristics table on page 6. It employs a verify-reprogram loop with up to 10 pulses per word, ensuring high first-pass yield without sacrificing data retention - cutting total firmware burn time significantly versus conventional EPROM algorithms.
AT27C4096-70JI 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:
- 70 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)
AT27C4096-70JI FAQ
1.How can I place an order for AT27C4096-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C4096-70JI 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 AT27C4096-70JI reliable?
The price and inventory of AT27C4096-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C4096-70JI is usually 5 days.
3.What payment methods are accepted for AT27C4096-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C4096-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C4096-70JI?
AT27C4096-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C4096-70JI 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 AT27C4096-70JI?
For technical support, including AT27C4096-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C4096-70JI requirements.
6.How does Aetrix verify that AT27C4096-70JI is sourced from the original manufacturer or authorized distributors?
All AT27C4096-70JI 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 AT27C4096-70JI meets industry standards.
7.What is the process for return or replacement of AT27C4096-70JI?
All AT27C4096-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C4096-70JI, 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 AT27C4096-70JI part is unused and in its original packaging.
Return procedure for AT27C4096-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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