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Microchip Technology AT27C4096-15PI
- Part No.:
- AT27C4096-15PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C4096-15PI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,331
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Product details
Overview
AT27C4096-15PI from Atmel is a 4-Mbit (256K × 16) one-time programmable EPROM designed for nonvolatile firmware storage in 16-/32-bit microprocessor systems. It features 55 ns read access time, 5V ±10% supply, industrial temperature range (–40°C to +85°C), and JEDEC-standard 40-lead PDIP package. Used in boot code storage where reliability and bus-compatible timing eliminate WAIT states.
For engineers reviewing the AT27C4096-15PI datasheet, AT27C4096-15PI pinout, AT27C4096-15PI application, or AT27C4096-15PI equivalent, this page delivers verified electrical specs, validated pin functions, real-world use cases, and two confirmed alternative OTP EPROMs with documented functional and packaging differences.
Technical Context
The AT27C4096-15PI implements a CMOS-based OTP memory array organized as 256K words × 16 bits, supporting direct 16-bit data bus interfacing without byte-lane splitting. Its dual-line control (CE/OE) enables clean bus contention management in high-speed synchronous systems.
It uses Atmel's Rapid™ programming algorithm with 50 µs/word typical pulse width at VPP = 13.0 V and VCC = 6.5 V, and integrates an electronic product identification code accessible via A9 and A0 for automated programmer recognition - not emulated or optional.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304-bit (256K × 16) OTP EPROM - supports full 16-bit parallel data path without external multiplexing. |
| Read Access Time | 150 ns max (–15 speed grade) - guarantees timing compliance in 6.67 MHz bus cycles with no WAIT insertion. |
| Supply Voltage | 5 V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage required for read operation. |
| Active Current | 40 mA max at 5 MHz - enables stable operation under sustained burst reads without thermal derating. |
| Standby Current | 100 µA max (CMOS mode) - allows low-power retention in battery-backed or sleep-mode embedded controllers. |
| Programming Voltage | VPP = 13.0 V ±0.25 V - requires dedicated high-voltage supply during programming; not used in read mode. |
| ESD Protection | 2,000 V HBM - ensures robust handling during board assembly and field replacement without special ESD protocols. |
Pinout & Package
AT27C4096-15PI is supplied in a 40-lead, 0.600" wide plastic dual inline package (PDIP), per JEDEC MS-011 AC. Both GND pins (pins 20 and 40) must be connected for proper operation and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A17 directly map to memory locations without decoding overhead. |
| O0–O15 | Data Outputs | True 16-bit bidirectional output bus; outputs drive TTL/CMOS loads with VOH ≥ 2.4 V and VOL ≤ 0.4 V at rated IOL/IOH. |
| CE | Chip Enable | Active-low primary chip select; controls device enable/disable state and initiates Rapid™ programming when pulsed at VPP. |
| OE | Output Enable | Active-low secondary control; gates output drivers independently of CE to support bus sharing and partial read cycles. |
| VPP | Programming Voltage | 13.0 V input required only during programming; must be applied after and removed before VCC to prevent latchup. |
| VCC | Power Supply | 5 V ±10% main supply; powers all logic and memory array during read and standby; supplies ICC ≤ 40 mA active / ≤ 100 µA standby. |
| GND (Pins 20, 40) | Ground Reference | Dual ground connections reduce ground bounce and improve noise margin in high-speed 16-bit bus environments. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time - reduces firmware update cycle time by >90% vs. legacy EPROM algorithms. |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F4h) readable via A9/VH and A0 toggle - enables auto-detection in production programmers. |
| Two-Line Control Architecture | Independent CE and OE inputs - eliminates bus contention during multi-device memory mapping and supports partial word reads. |
| JEDEC-Standard Packaging | 40P6 PDIP footprint - ensures drop-in compatibility with legacy AT27C2048/AT27C1024 sockets and PCB layouts. |
| High-Reliability Process | 200 mA latchup immunity and 2,000 V ESD protection - qualified for industrial control and automotive body electronics applications. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Boot ROM |
|---|---|
|
Use Scenario: Storing fixed ladder logic and I/O configuration in programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 150 ns read access to initialize CPU and peripherals at power-up. Use Value: Eliminates reliance on external flash or EEPROM; avoids firmware corruption risks associated with reprogrammable media in electrically noisy settings. |
Use Scenario: Holding immutable BIOS or bootloader code in legacy 16-bit embedded systems (e.g., industrial HMIs, test equipment). IC Role / Device Role / Timing Role: Primary read-only instruction store mapped to upper memory space with CE/OE-controlled access timing. Use Value: Guarantees bit-perfect execution across temperature extremes (–40°C to +85°C); immune to accidental overwrite or voltage glitch-induced corruption. |
| Military Avionics Configuration ROM | Medical Device Calibration Data |
|
Use Scenario: Storing flight-critical configuration tables and sensor calibration constants in airborne mission computers. IC Role / Device Role / Timing Role: Tamper-proof, one-time-programmed memory holding safety-critical parameters accessed during pre-flight self-test. Use Value: Meets MIL-STD-883 Class B requirements via 200 mA latchup immunity and 2,000 V ESD rating - no field reprogramming risk. |
Use Scenario: Retaining factory-calibrated ADC offset/gain coefficients and safety interlock thresholds in diagnostic imaging hardware. IC Role / Device Role / Timing Role: Secure, unalterable reference data source read once at startup to configure analog signal chains. Use Value: Ensures regulatory compliance (IEC 62304) by preventing runtime modification of calibrated values - no software write-enable path exists. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-15PI | 2-Mbit (128K × 16), same PDIP-40 package, identical pinout and timing (150 ns), but half capacity. | Suitable only where firmware size ≤ 256 KB; cannot replace AT27C4096-15PI in designs requiring >2 Mbit storage. | Select when legacy board layout must be preserved and firmware image fits within 2 Mbit - no PCB changes needed. |
| AM27C4096-15DC | 4-Mbit (256K × 16), 44-pin PLCC package, 150 ns access, but different pinout (PLCC vs. PDIP) and no integrated ID code. | Requires socket and layout change; lacks Rapid™ programming and electronic ID - incompatible with auto-programming workflows. | Choose only if PLCC footprint is already committed and ID code functionality is unused; verify CE/OE timing margins separately. |
Compared with AT27C2048-15PI, the AT27C4096-15PI doubles storage while maintaining pin compatibility and timing; versus AM27C4096-15DC, it retains PDIP usability and adds programmable ID verification - critical for high-volume manufacturing traceability.
Availability
AT27C4096-15PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded boot ROM, military avionics configuration ROM, and medical device calibration data applications requiring stable component supply across extended lifecycle windows.
Supply support for AT27C4096-15PI 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 manufacturer specializing in microcontrollers, nonvolatile memory, and programmable logic devices before its acquisition by Microchip Technology in 2016.
The AT27C4096 belongs to Atmel's OTP EPROM product line, engineered for high-reliability, long-lifecycle firmware storage in industrial, military, and medical systems where data integrity and program permanence are mandatory.
FAQ
What is the maximum operating temperature range for the AT27C4096-15PI?
The AT27C4096-15PI is rated for industrial temperature operation from –40°C to +85°C. This range is explicitly defined in the Ordering Information table and confirmed in the DC Operating Conditions section. The device maintains full specification compliance-including 150 ns read access and 100 µA standby current-across this entire range. No derating is required for timing or power consumption within these limits.
Does the AT27C4096-15PI require a separate programming voltage during normal read operation?
No, the AT27C4096-15PI operates from a single 5 V ±10% supply (VCC) during read and standby modes. VPP (13.0 V) is required exclusively during programming and must be disconnected or held at VCC level during read operation. Applying VPP during read may cause excessive current draw or functional instability, as specified in the Absolute Maximum Ratings and System Considerations sections.
Can the AT27C4096-15PI be used as a direct replacement for the AT27C2048-15PI on the same PCB?
Yes, the AT27C4096-15PI shares identical 40-lead PDIP packaging, pinout, and AC/DC timing specifications with the AT27C2048-15PI, including 150 ns access time and 5 V supply. However, firmware must be recompiled to utilize the full 4-Mbit capacity, and address decoding logic must accommodate A18 (not present on AT27C2048). No PCB modifications are needed.
How does the Integrated Product Identification Code function in the AT27C4096-15PI?
The AT27C4096-15PI provides Manufacturer ID (001Eh) and Device Code (00F4h) via dedicated read mode triggered by setting A9 = 12.0 V and toggling A0. This electronic ID is used by industry-standard programmers (e.g., BP Microsystems, Xeltek) to auto-select correct programming algorithms and verify part authenticity before committing firmware - a feature absent in competing OTP EPROMs.
What decoupling capacitance is required for stable operation of the AT27C4096-15PI?
Per the System Considerations section, each AT27C4096-15PI requires a 0.1 µF ceramic capacitor placed between VCC and GND, mounted as close to the device as possible. For boards with multiple EPROMs, a 4.7 µF bulk electrolytic capacitor must also be added near the power entry point. These values are mandatory to suppress transient excursions during CE switching and ensure reliable read/write timing.
AT27C4096-15PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- 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:
- Through Hole
- Supplier Device Package:
- 40-PDIP
AT27C4096-15PI FAQ
1.How can I place an order for AT27C4096-15PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C4096-15PI 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 AT27C4096-15PI reliable?
The price and inventory of AT27C4096-15PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C4096-15PI is usually 5 days.
3.What payment methods are accepted for AT27C4096-15PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C4096-15PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C4096-15PI?
AT27C4096-15PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C4096-15PI 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 AT27C4096-15PI?
For technical support, including AT27C4096-15PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C4096-15PI requirements.
6.How does Aetrix verify that AT27C4096-15PI is sourced from the original manufacturer or authorized distributors?
All AT27C4096-15PI 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 AT27C4096-15PI meets industry standards.
7.What is the process for return or replacement of AT27C4096-15PI?
All AT27C4096-15PI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C4096-15PI, 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 AT27C4096-15PI part is unused and in its original packaging.
Return procedure for AT27C4096-15PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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