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Microchip Technology AT27C4096-15PC
- Part No.:
- AT27C4096-15PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C4096-15PC.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,882
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Product details
Overview
AT27C4096-15PC from Atmel is a 4-Mbit (256K × 16) one-time programmable EPROM with 150 ns maximum read access time, 5V ±10% supply operation, and JEDEC-standard 40-lead PDIP package. It delivers TTL/CMOS-compatible I/O, dual-line control (CE/OE), and rapid programming at 50 µs/word - enabling firmware storage in 16-/32-bit microprocessor systems without wait states.
For engineers reviewing the AT27C4096-15PC datasheet, AT27C4096-15PC pinout, AT27C4096-15PC application, or AT27C4096-15PC equivalent, key selection criteria include its 150 ns tACC timing grade, 40 mA active current at 5 MHz, industrial temperature range (-40°C to +85°C), and OTP reliability for legacy embedded boot code storage.
Technical Context
The AT27C4096-15PC implements a parallel-addressed, by-16 organization OTP memory architecture with two independent enable controls: Chip Enable (CE) and Output Enable (OE). Its address space spans A0–A17 (18-bit), supporting 256K words of 16-bit data. The device operates exclusively in 5V read mode and requires 12V VPP only during programming.
It features Rapid™ programming with verified reprogramming loops per word, integrated product identification (Manufacturer ID 001Eh, Device ID 00F4h), and robust ESD/latchup protection (2000V HBM, 200 mA). Both GND pins must be connected, and decoupling requires 0.1 µF ceramic + 4.7 µF bulk capacitors per device.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (256K × 16) - supports full 16-bit data bus interface without byte-wide splitting |
| Read Access Time (tACC) | 150 ns max - eliminates WAIT states in 6–8 MHz 16-bit CPU systems |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage required for read |
| Active Current (ICC) | 40 mA max at 5 MHz - enables stable operation under sustained burst reads |
| Standby Current (ISB) | 100 µA max (CMOS) - suitable for low-power hold modes in battery-backed systems |
| Programming Voltage (VPP) | 12.0 V ±0.5 V - requires external high-voltage source; not used in normal read operation |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded control and instrumentation |
Pinout & Package
AT27C4096-15PC is supplied in a 40-lead, 0.600" wide plastic dual inline package (PDIP), JEDEC MS-011 AC compliant, with 0.100" lead pitch and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; selects one of 256K 16-bit words; all must be stable before CE/OE assertion |
| O0–O15 | Data Outputs | True 16-bit bidirectional data bus; outputs driven only when CE=VIL and OE=VIL |
| CE | Chip Enable | Primary device select; places outputs in high-Z when VIH; controls power state transition |
| OE | Output Enable | Secondary output gate; allows bus sharing without contention when CE=VIL but OE=VIH |
| VCC | Power Supply | +5V supply pin; must be applied simultaneously with or before VPP during programming |
| VPP | Programming Voltage | +12V input for programming; floating or tied to VCC in read mode; requires 0.1 µF decoupling |
| GND (Pins 12 & 40) | Ground | Two dedicated ground connections - both must be soldered to minimize noise and ensure latchup immunity |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with auto-verify loop - reduces firmware update cycle time by >90% vs. legacy EPROMs |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device ID (00F4h) accessible via A9/VH and A0 toggle - enables automatic algorithm selection in production programmers |
| Dual-Line Control (CE/OE) | Independent chip and output enables - prevents bus contention in multi-device memory maps and simplifies timing design |
| High-Reliability CMOS Process | 2000V ESD protection and 200 mA latchup immunity - ensures robustness in manual handling and noisy industrial environments |
| Direct Upgrade Path | Pin- and software-compatible replacement for AT27C516 (512K), AT27C1024 (1M), and AT27C2048 (2M) - minimizes PCB redesign effort |
Applications
| Industrial PLC Firmware Storage | Legacy Medical Instrument Boot ROM |
|---|---|
Use Scenario: Storing fixed boot code and calibration tables in programmable logic controllers with 16-bit Z8000 or Motorola 68000 CPUs. IC Role / Device Role / Timing Role: Non-volatile boot memory providing immediate instruction fetch on power-up; accessed via parallel address/data bus with CE/OE handshaking. Use Value: 150 ns tACC ensures zero-wait-state execution at 6.67 MHz CPU clock; OTP guarantees firmware integrity against accidental overwrite. | Use Scenario: Holding diagnostic firmware and safety-critical initialization routines in FDA-cleared patient monitors and imaging subsystems. IC Role / Device Role / Timing Role: Primary read-only program memory mapped into CPU address space; powered from isolated 5V rail with strict decoupling per datasheet. Use Value: -40°C to +85°C rating supports operation in uncontrolled clinical environments; 2000V ESD protects during field service and board replacement. |
| Military Avionics Configuration Memory | Automotive Engine Control Unit (ECU) Calibration Data |
Use Scenario: Storing flight-critical configuration parameters and sensor lookup tables in airborne mission computers where reprogrammability is prohibited. IC Role / Device Role / Timing Role: Immutable configuration store accessed during cold start; interfaced to MIL-STD-1553 bus controller via local 16-bit memory interface. Use Value: OTP architecture prevents runtime corruption; 100 µA standby current extends battery-backed retention time during aircraft ground maintenance. | Use Scenario: Hosting engine calibration maps (fuel timing, spark advance) in pre-OBD-II automotive ECUs where flash memory was not yet standardized. IC Role / Device Role / Timing Role: Read-only data repository mapped into microcontroller's external memory space; accessed during engine cranking and idle stabilization. Use Value: 40 mA active current supports burst reads during transient load conditions; industrial temp range accommodates under-hood thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C4096-15JI | Same die, 44-lead PLCC package; identical timing, voltage, and programming specs | Suitable for surface-mount designs requiring higher pin density and better thermal dissipation | Select when PCB layout uses PLCC footprints and requires RoHS-compliant reflow assembly |
| AT27C4096-15VC | Same die, 40-lead VSOP (10 mm × 14 mm); identical electrical specs but thinner profile | Used in space-constrained applications like portable test equipment and compact industrial controllers | Select when board height is limited and through-hole PDIP is mechanically incompatible |
Compared with AT27C4096-15PC, the -15JI offers surface-mount compatibility and improved thermal performance, while the -15VC provides ultra-low profile packaging - both retain identical OTP functionality, timing, and programming behavior but differ in mechanical integration requirements.
Availability
AT27C4096-15PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy medical instrument boot ROM, military avionics configuration memory, and automotive ECU calibration data requiring stable component supply across extended product lifecycles.
Supply support for AT27C4096-15PC 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) was a U.S.-based semiconductor company specializing in non-volatile memory, microcontrollers, and security ICs for industrial, automotive, and communications markets.
The AT27C4096 belongs to Atmel's OTP EPROM product line, designed specifically for reliable, tamper-resistant firmware and configuration storage in systems where in-field reprogramming is unnecessary or undesirable.
FAQ
What is the maximum read access time specified for the AT27C4096-15PC?
The AT27C4096-15PC has a maximum read access time (tACC) 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 to valid data output when both CE and OE are asserted low. The "15" in the part number directly denotes this 150 ns speed grade.
Does the AT27C4096-15PC require a high-voltage supply during normal operation?
No, the AT27C4096-15PC operates from a single 5V ±10% supply during read mode. The VPP pin (12.0 V ±0.5 V) is required only during programming and must be disconnected or floated during normal read operation. Applying VPP during read may increase standby current and is not recommended per the datasheet.
Can the AT27C4096-15PC be used as a drop-in replacement for older EPROMs like the AT27C2048?
Yes, the AT27C4096-15PC is explicitly designed as a direct upgrade path for AT27C516, AT27C1024, and AT27C2048 EPROMs. It maintains identical pinouts, voltage levels, timing interfaces, and control logic - allowing reuse of existing PCB layouts and firmware drivers with only capacity expansion benefits.
What decoupling capacitors are required for stable operation of the AT27C4096-15PC?
The AT27C4096-15PC requires two decoupling capacitors: a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND as close to the device as possible, plus a 4.7 µF bulk electrolytic capacitor near the power entry point of the EPROM array. These mitigate transient excursions during CE transitions and stabilize the 5V rail under dynamic load.
How is the product identification code accessed on the AT27C4096-15PC?
The AT27C4096-15PC's integrated product ID is accessed by setting A9 to 12.0 V (VH), holding A1–A17 low, and toggling A0: low (VIL) reads the Manufacturer ID (001Eh), high (VIH) reads the Device ID (00F4h). This feature is used by industry-standard programmers to auto-detect the device and apply correct programming algorithms.
AT27C4096-15PC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 40-PDIP
AT27C4096-15PC FAQ
1.How can I place an order for AT27C4096-15PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C4096-15PC 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 AT27C4096-15PC reliable?
The price and inventory of AT27C4096-15PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C4096-15PC is usually 5 days.
3.What payment methods are accepted for AT27C4096-15PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C4096-15PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C4096-15PC?
AT27C4096-15PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C4096-15PC 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 AT27C4096-15PC?
For technical support, including AT27C4096-15PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C4096-15PC requirements.
6.How does Aetrix verify that AT27C4096-15PC is sourced from the original manufacturer or authorized distributors?
All AT27C4096-15PC 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 AT27C4096-15PC meets industry standards.
7.What is the process for return or replacement of AT27C4096-15PC?
All AT27C4096-15PC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C4096-15PC, 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 AT27C4096-15PC part is unused and in its original packaging.
Return procedure for AT27C4096-15PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27C4096-15PC Tags
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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