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Microchip Technology AT27C4096-70VI
- Part No.:
- AT27C4096-70VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27C4096-70VI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,886
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Product details
Overview
AT27C4096-70VI 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 operation, and industrial temperature range (-40°C to +85°C). It supports rapid programming at 50 µs/word and delivers 40 mA active current at 5 MHz while maintaining ≤100 µA standby current.
For engineers reviewing the AT27C4096-70VI datasheet, AT27C4096-70VI pinout, AT27C4096-70VI application, or AT27C4096-70VI equivalent, key selection criteria include JEDEC-standard 40-lead PDIP package compatibility, dual-line CE/OE control for bus contention avoidance, OTP firmware storage reliability, and direct upgrade path from AT27C2048/AT27C1024/AT27C516 devices.
Technical Context
The AT27C4096-70VI implements a CMOS-based OTP memory architecture with 256K words × 16-bit organization, enabling byte-wide or word-wide data access in 16-bit bus systems. Its two-line control interface (CE and OE) allows precise output gating and eliminates bus contention during high-speed read cycles.
It uses Atmel's Rapid™ Programming Algorithm with 13 V programming voltage (VPP) and integrated product identification code (001Eh manufacturer ID, 00F4h device ID), supporting automated programming equipment recognition and verification loops with up to 10 pulses per failed word.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4,194,304 bits (256K × 16), enabling full firmware image storage for mid-complexity embedded controllers |
| Read Access Time | 70 ns max - eliminates WAIT states in 14-MHz Z80 or 20-MHz 80C186 systems |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails without regulation overhead |
| Active Current | 40 mA max at 5 MHz - supports sustained burst reads without thermal derating in industrial enclosures |
| Standby Current | 100 µA max - enables low-power hold mode during processor sleep in battery-backed systems |
| Programming Voltage | VPP = 12.0 V ±0.5 V - requires dedicated programming supply; not operable from VCC alone |
| Operating Temperature | -40°C to +85°C - qualified for industrial control, motor drives, and factory automation environments |
Pinout & Package
AT27C4096-70VI is supplied in a 40-lead, 0.600" wide plastic dual inline package (PDIP), JEDEC MS-011 AC compliant, with 2.54 mm lead pitch and through-hole mounting. Both GND pins (Pin 20 and Pin 40) must be connected for ESD and latchup immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word decoding; A0–A17 mapped directly to CPU address lines |
| O0–O15 | Data Outputs | 16-bit bidirectional data bus; outputs driven only when CE=low and OE=low; high-Z otherwise |
| CE | Chip Enable | Primary chip select; device enters standby (high-Z outputs) when CE=high, regardless of OE state |
| OE | Output Enable | Secondary output gate; enables data drivers only when CE=low and OE=low; prevents bus contention |
| VPP | Programming Voltage | 12 V input required only during programming; must be applied after VCC and removed before VCC |
| VCC | Power Supply | 5 V ±10% main supply; powers logic and outputs; supplies 40 mA max during active read cycles |
| GND (Pins 20 & 40) | Ground Reference | Dual ground pins reduce ground bounce and improve noise margin in high-speed read operations |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with auto-verify loop - reduces firmware update cycle time by >60% vs. legacy EPROMs |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F4h) accessible via A9/VH and A0 toggle - enables automatic algorithm selection in production programmers |
| ESD & Latchup Protection | 2000 V HBM ESD rating and 200 mA latchup immunity - ensures robustness during handling and board-level rework |
| JEDEC Standard Packages | Drop-in compatible with AT27C2048/AT27C1024 footprints in PDIP, PLCC, and VSOP - no PCB redesign needed for capacity upgrade |
| Two-Line Control Architecture | Independent CE and OE inputs - allows interleaved memory access and clean bus release without external logic |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot ROM |
|---|---|
|
Use Scenario: Storing ladder logic firmware and I/O configuration tables in DIN-rail mounted programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Non-volatile boot ROM providing deterministic 70 ns instruction fetch timing for real-time scan cycles. Use Value: Eliminates mechanical wear and write endurance limits of EEPROM; retains firmware across 10+ year deployments without refresh. |
Use Scenario: Replacing obsolete 27C2048 EPROMs in legacy medical analyzers and test equipment requiring field-upgradable firmware. IC Role / Device Role / Timing Role: Pin-compatible OTP replacement delivering identical 16-bit data bus interface and CE/OE timing behavior. Use Value: Enables firmware updates using existing programming infrastructure while extending memory capacity to support enhanced diagnostics. |
| Automotive Engine Control Module (ECM) | Avionics Configuration Memory |
|
Use Scenario: Storing calibration maps and emission control parameters in engine control units deployed in under-hood environments. IC Role / Device Role / Timing Role: Industrial-grade OTP memory sustaining -40°C to +85°C operation with 100 µA standby draw during ignition-off periods. Use Value: Meets AEC-Q100 stress requirements for non-volatile storage without battery backup or refresh circuitry. |
Use Scenario: Holding flight-critical configuration data (e.g., sensor scaling factors, trim values) in certified avionics line-replaceable units (LRUs). IC Role / Device Role / Timing Role: High-reliability OTP memory with 2000 V ESD protection and traceable manufacturing lot coding. Use Value: Supports DO-254 compliance via immutable firmware image and programmable ID verification during burn-in testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-70VI | 2-Mbit (128K × 16), same 70 ns speed, identical PDIP-40 pinout and CE/OE interface | Limited to smaller firmware images; lacks capacity for complex boot loaders or multi-region code | Select when firmware size remains ≤256 KB and cost sensitivity outweighs future scalability needs |
| AM27C4096-70DC | Same 4-Mbit density and 70 ns speed but manufactured by AMD; requires 12.5 V VPP and exhibits 120 µA max ISB | Higher standby current impacts battery-backed systems; different ID code prevents automatic programmer recognition | Choose only if legacy AMD-programmer infrastructure exists and Atmel-specific ID features are unused |
Compared with AT27C2048-70VI, the AT27C4096-70VI doubles firmware capacity without changing PCB layout or timing margins; versus AM27C4096-70DC, it offers lower standby current and guaranteed Atmel ID code compatibility for production programming automation.
Availability
AT27C4096-70VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot ROM upgrades, and automotive engine control module calibration memory requiring stable component supply across extended product lifecycles.
Supply support for AT27C4096-70VI 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 semiconductor designer specializing in microcontrollers, non-volatile memory, and secure authentication ICs for industrial, automotive, and IoT applications.
The AT27C4096 belongs to Atmel's OTP EPROM product line, engineered for reliable, high-density firmware storage in systems where reprogrammability is unnecessary but long-term data retention and deterministic timing are critical.
FAQ
What is the maximum operating temperature range for the AT27C4096-70VI?
The AT27C4096-70VI is rated for industrial temperature operation from -40°C to +85°C. This specification is validated per JEDEC JESD22-A108 and applies to all electrical parameters including tACC (70 ns), ICC (40 mA), and ISB (100 µA). The device maintains full functionality across this range without derating, making it suitable for under-hood automotive or factory-floor control applications where ambient temperatures exceed commercial-grade limits.
Does the AT27C4096-70VI require a separate programming voltage during normal operation?
No - the AT27C4096-70VI operates from a single 5V ±10% supply (VCC) during read mode. VPP (12.0 V ±0.5 V) is required exclusively during programming and must be disconnected during normal system operation. Applying VPP while reading risks exceeding absolute maximum ratings and may cause permanent damage. The AT27C4096-70VI datasheet explicitly states VPP must be applied after VCC and removed before VCC during programming sequences.
Can the AT27C4096-70VI be used as a direct replacement for the AT27C2048 in an existing design?
Yes - the AT27C4096-70VI shares identical pinout, timing parameters (70 ns tACC), and interface logic (CE/OE dual control) with the AT27C2048-70VI in PDIP-40 packaging. No PCB changes are required. However, firmware must be recompiled to utilize the full 256K-word address space, and the AT27C4096-70VI's higher density enables larger boot code, calibration tables, or diagnostic routines without increasing chip count.
What is the purpose of the Integrated Product Identification Code in the AT27C4096-70VI?
The AT27C4096-70VI embeds a Manufacturer Identification Code (001Eh) and Device Code (00F4h) readable via A9 and A0 pins during special identification mode. This allows automated programming equipment to verify part authenticity, select correct programming algorithms and voltages, and prevent misprogramming. The AT27C4096-70VI's ID code is electrically distinct from AT27C2048 (00F0h), ensuring firmware integrity in mixed-BOM production lines.
How does the Rapid™ Programming Algorithm improve production efficiency for the AT27C4096-70VI?
The Rapid™ Programming Algorithm reduces AT27C4096-70VI programming time to 50 µs per word (typical), with built-in verification and up to 10 retry pulses per failed location. This cuts total 4-Mbit programming time to under 2 minutes versus >10 minutes for conventional EPROM algorithms. The AT27C4096-70VI's algorithm also minimizes VPP stress cycles, improving yield in high-volume firmware loading for industrial controllers and medical devices.
AT27C4096-70VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- 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:
- 40-VSOP
AT27C4096-70VI FAQ
1.How can I place an order for AT27C4096-70VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C4096-70VI 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 AT27C4096-70VI reliable?
The price and inventory of AT27C4096-70VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C4096-70VI is usually 5 days.
3.What payment methods are accepted for AT27C4096-70VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C4096-70VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C4096-70VI?
AT27C4096-70VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C4096-70VI 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 AT27C4096-70VI?
For technical support, including AT27C4096-70VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C4096-70VI requirements.
6.How does Aetrix verify that AT27C4096-70VI is sourced from the original manufacturer or authorized distributors?
All AT27C4096-70VI 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 AT27C4096-70VI meets industry standards.
7.What is the process for return or replacement of AT27C4096-70VI?
All AT27C4096-70VI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C4096-70VI, 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 AT27C4096-70VI part is unused and in its original packaging.
Return procedure for AT27C4096-70VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27C4096-70VI Tags
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