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Microchip Technology AT27C4096-15JC
- Part No.:
- AT27C4096-15JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C4096-15JC.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,082
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Product details
Overview
AT27C4096-15JC from Atmel is a 4-Mbit (256K × 16) one-time programmable EPROM optimized for high-performance 16-/32-bit microprocessor systems, featuring 150 ns read access time, 5V ±10% single-supply operation, and JEDEC-standard 44-lead PLCC packaging. It delivers low active current (40 mA max at 5 MHz) and ultra-low standby current (100 µA max), enabling reliable firmware storage without mass-storage latency.
For engineers reviewing the AT27C4096-15JC datasheet, AT27C4096-15JC pinout, AT27C4096-15JC application, or AT27C4096-15JC equivalent, key selection criteria include its -15 speed grade (150 ns tACC), dual-line control (CE/OE), OTP reliability for fixed firmware, and compatibility with legacy 512K–2M-bit EPROM upgrades in industrial temperature range (-40°C to +85°C).
Technical Context
The AT27C4096-15JC implements a by-16 organization with 18 address lines (A0–A17) and 16 bidirectional data outputs (O0–O15), supporting direct interface to 16-bit data buses without external demultiplexing. Its two-line enable architecture (CE and OE) eliminates bus contention in high-speed systems and enables flexible memory-mapped or I/O-mapped access.
It uses Atmel's Rapid™ programming algorithm with 50 µs/word typical programming time and integrated product identification code (Manufacturer ID: 001Eh, Device Code: 00F4h) for automated programmer recognition. Programming requires VPP = 12.0 ± 0.5 V and VCC = 6.5 ± 0.25 V, with strict sequencing (VCC before/after VPP) and decoupling (0.1 µF ceramic + 4.7 µF bulk capacitor).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 bits (256K × 16), enabling full firmware images for mid-complexity embedded controllers. |
| Read Access Time (tACC) | 150 ns maximum - eliminates WAIT states in 6–8 MHz 16-bit bus systems. |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails and legacy 5V system designs. |
| Active Current (ICC) | 40 mA maximum at 5 MHz - supports sustained burst reads without thermal derating. |
| Standby Current (ISB) | 100 µA maximum (CMOS mode) - extends battery life in low-power hold modes. |
| ESD Protection | 2,000V HBM - ensures robustness during board handling and in-circuit programming. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded applications. |
Pinout & Package
AT27C4096-15JC is packaged in a 44-lead plastic J-leaded chip carrier (PLCC), JEDEC MS-018 AC compliant, with 16 mm × 16 mm body size and 1.27 mm lead pitch. Both GND pins (pins 22 and 39) must be connected for stable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus interface; selects one of 256K words in linear memory map. |
| O0–O15 | Data Outputs | 16-bit bidirectional data bus; driven only when CE = OE = low, high-Z otherwise. |
| CE | Chip Enable | Primary device select; deassertion places outputs in high-impedance state regardless of OE. |
| OE | Output Enable | Secondary output control; allows shared bus operation with other devices using CE priority. |
| VPP | Programming Voltage | 12.0 ± 0.5 V input required only during programming; must be sequenced after VCC. |
| VCC | Power Supply | 5V ±10% supply; powers logic and output drivers; must be present before/after VPP. |
| GND (pins 22, 39) | Ground Reference | Dual ground connections reduce noise coupling and ensure stable read/write margins. |
| NC (pins 13, 26, 41) | No Connect | Internally unconnected; must remain floating - no external tie required. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with auto-verify loop - reduces production burn-in time by >70% vs. conventional EPROMs. |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F4h) accessible via A9/VH and A0 toggle - enables plug-and-play recognition in automated programmers. |
| Two-Line Control Architecture | Independent CE and OE inputs - supports hierarchical memory decoding and avoids bus contention in multi-device systems. |
| JEDEC Standard Packages | 44-lead PLCC (44J) footprint - ensures drop-in replacement for existing PLCC-based EPROM sockets and PCB layouts. |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2,000V ESD protection - meets industrial system robustness requirements without external protection. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Controller Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O configuration in programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Non-volatile boot-time firmware repository accessed during cold start and watchdog reset recovery. Use Value: 150 ns access time enables deterministic boot within 200 µs; industrial temp rating (-40°C to +85°C) ensures reliability across ambient extremes. |
Use Scenario: Providing immutable BIOS and peripheral initialization code for 16-bit microcontrollers (e.g., Intel 80C186, Motorola 68000) in medical diagnostic equipment. IC Role / Device Role / Timing Role: Primary read-only instruction store mapped to upper memory space, accessed via 16-bit data bus. Use Value: By-16 organization eliminates glue logic; 5V compatibility matches legacy controller voltage rails without level-shifting. |
| Automotive Engine Control Unit (ECU) Calibration Data | Military Communications Terminal Bootloader |
Use Scenario: Holding engine calibration maps and safety-critical lookup tables in automotive ECUs where firmware updates are infrequent but data integrity is paramount. IC Role / Device Role / Timing Role: OTP storage for static calibration parameters, accessed during power-on self-test and closed-loop control loops. Use Value: One-time programmability prevents accidental overwrites; 2,000V ESD rating withstands vehicle-level transients per ISO 10605. |
Use Scenario: Storing secure bootloader code in ruggedized tactical radios requiring tamper-resistant, field-deployable firmware with zero runtime write capability. IC Role / Device Role / Timing Role: Immutable first-stage boot ROM executed immediately after reset, verifying subsequent encrypted firmware images. Use Value: Rapid™ programming enables secure pre-load at manufacturing; industrial temp range supports extended field operations in desert or arctic conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C4096-15PC | Same die, 40-lead PDIP package (40P6); 0.600" width; no J-leads. | Preferred for through-hole prototyping, manual rework, or legacy socket compatibility. | Select when board layout uses DIP sockets or requires hand-soldering accessibility. |
| AT27C4096-15VI | Same die, 40-lead VSOP package (40V); 10 mm × 14 mm; thinner profile. | Suitable for space-constrained industrial modules where PLCC height exceeds mechanical envelope. | Select when Z-height is constrained (< 1.6 mm) and surface-mount assembly is available. |
Compared with AT27C4096-15PC and AT27C4096-15VI, the AT27C4096-15JC offers superior thermal dissipation and mechanical stability in vibration-prone industrial enclosures due to its PLCC gull-wing leads and larger thermal pad area, while maintaining identical timing, programming, and logic behavior.
Availability
AT27C4096-15JC is available at Aetrix Electronics and suitable for industrial PLCs, legacy embedded controller upgrades, and automotive ECU calibration storage requiring stable component supply across extended product lifecycles.
Supply support for AT27C4096-15JC 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 communications markets.
The AT27C4096 belongs to Atmel's OTP EPROM product line, designed specifically for cost-sensitive, high-reliability firmware storage in systems where flash endurance or reprogrammability is unnecessary and data immutability is critical.
FAQ
What is the maximum read access time specified for the AT27C4096-15JC?
The AT27C4096-15JC has a maximum read access time (tACC) of 150 ns under commercial and industrial temperature ranges, measured with CE and OE both asserted low. This value is guaranteed across the full operating voltage range (5V ±10%) and defines the worst-case delay from valid address to stable data on O0–O15. The -15 suffix explicitly denotes this speed grade.
Can the AT27C4096-15JC be used as a direct replacement for AT27C2048 in an existing design?
Yes - the AT27C4096-15JC is documented as a direct upgrade path from AT27C2048 (2M-bit), AT27C1024 (1M-bit), and AT27C516 (512K-bit) EPROMs. It maintains identical pinout, voltage levels, and control signaling (CE/OE), though its 256K × 16 organization requires verification of address/data bus width compatibility in the target system.
What programming voltage and sequence are required for the AT27C4096-15JC?
The AT27C4096-15JC requires VPP = 12.0 ± 0.5 V applied only during programming, with strict sequencing: VCC must be applied simultaneously with or before VPP, and removed simultaneously with or after VPP. Failure to follow this sequence risks exceeding absolute maximum ratings and may cause permanent damage to the AT27C4096-15JC.
Does the AT27C4096-15JC support both CMOS and TTL logic families?
Yes - the AT27C4096-15JC features CMOS and TTL compatible inputs and outputs. Input thresholds meet both CMOS (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and TTL (VIL ≤ 0.8 V, VIH ≥ 2.0 V) specifications, and output drive strength (IOL = 2.1 mA, IOH = -400 µA) satisfies TTL loading requirements, ensuring interoperability with mixed-logic systems containing the AT27C4096-15JC.
How is the product identification code accessed on the AT27C4096-15JC?
The AT27C4096-15JC provides an integrated product identification code readable during normal operation: set A9 = 12.0 ± 0.5 V (VH), hold A1–A17 = low, then toggle A0 between low (VIL) and high (VIH) to select Manufacturer ID (001Eh) or Device Code (00F4h) on outputs O15–O0. This feature is used by industry-standard programmers to auto-detect the AT27C4096-15JC and apply correct algorithms.
AT27C4096-15JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT27C4096-15JC FAQ
1.How can I place an order for AT27C4096-15JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C4096-15JC 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 AT27C4096-15JC reliable?
The price and inventory of AT27C4096-15JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C4096-15JC is usually 5 days.
3.What payment methods are accepted for AT27C4096-15JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C4096-15JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C4096-15JC?
AT27C4096-15JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C4096-15JC 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 AT27C4096-15JC?
For technical support, including AT27C4096-15JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C4096-15JC requirements.
6.How does Aetrix verify that AT27C4096-15JC is sourced from the original manufacturer or authorized distributors?
All AT27C4096-15JC 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 AT27C4096-15JC meets industry standards.
7.What is the process for return or replacement of AT27C4096-15JC?
All AT27C4096-15JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C4096-15JC, 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 AT27C4096-15JC part is unused and in its original packaging.
Return procedure for AT27C4096-15JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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