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Microchip Technology AT27C080-90JU
- Part No.:
- AT27C080-90JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27C080-90JU.pdf
- Description:
- IC EPROM 8MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,782
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Product details
Overview
AT27C080-90JU from Microchip Technology (formerly Atmel) is an 8 Mbit (1M × 8) one-time programmable EPROM with 90 ns read access time, 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It features CMOS/TTL-compatible I/O, dual-line control (CE/OE), and rapid 50 µs/byte programming - enabling firmware storage in microprocessor systems without wait states.
For engineers reviewing the AT27C080-90JU datasheet, AT27C080-90JU pinout, AT27C080-90JU application, or AT27C080-90JU equivalent, key selection criteria include OTP reliability, PLCC-32 packaging, 100 µA max standby current, JEDEC-standard footprint compatibility, and integrated product identification code for automated programming validation.
Technical Context
The AT27C080-90JU implements a parallel-addressed OTP EPROM architecture with 20-bit address bus (A0–A19) and 8-bit bidirectional data bus (O0–O7), using CE and OE/VPP as active-low chip and output enable controls. Its rapid programming mode applies 13.0 V to OE/VPP and 6.5 V to VCC, with 50 µs CE pulses and per-byte verification loops.
It supports product identification via A9 = 12.0 V and A0 toggling to select manufacturer (0x1E) or device code (0x8A) bytes. The device requires decoupling: 0.1 µF ceramic capacitor at VCC/GND plus 4.7 µF bulk electrolytic for arrays - reflecting its sensitivity to transient voltage excursions during CE state transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8,388,608 bits (1,048,576 × 8), enabling full firmware image storage for 8-bit microcontrollers |
| Read access time | 90 ns max - eliminates WAIT states in 5 MHz Z80, 8051, or 68K-based systems |
| Supply voltage | 5 V ±10% - compatible with legacy TTL/CMOS logic rails without regulation overhead |
| Standby current | 100 µA max - supports low-power hold modes in battery-backed or intermittent operation |
| Active current | 40 mA max at 5 MHz - defines thermal budget for dense EPROM arrays on PCBs |
| Programming voltage | VPP = 13.0 V ±0.25 V on OE/VPP pin - requires dedicated high-voltage programming circuitry |
| Operating temperature | –40°C to +85°C - qualified for industrial control panels and factory automation hardware |
Pinout & Package
AT27C080-90JU is packaged in a 32-lead plastic J-leaded chip carrier (PLCC), JEDEC MS-016 variation AE compliant, with 12.46 mm × 14.99 mm body and 1.27 mm lead pitch. Pin 1 identifier is marked by a corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address inputs | 20-bit parallel address bus selecting one of 1M byte locations |
| O0–O7 | Data outputs | 8-bit bidirectional data bus - outputs valid only when CE and OE both low |
| CE | Chip enable | Active-low global enable; high-Z outputs when high - prevents bus contention in multi-device systems |
| OE/VPP | Output enable / Program supply | Dual-function pin: low during read, 13.0 V during programming - requires voltage-level switching in programmer design |
| VCC | Power supply | 5 V ±10% main supply - must be applied before/removed after OE/VPP to avoid latchup |
| GND | Ground reference | Signal and power return - decoupling capacitor must connect here and to VCC within 2 mm |
Key Features
| Feature | Design Value |
|---|---|
| Rapid programming algorithm | 50 µs/byte typical - reduces firmware burn time by >90% vs. conventional EPROMs, with up to 10 retries per byte |
| Integrated product ID code | Manufacturer ID (0x1E) and device ID (0x8A) readable via A9=12.0 V and A0 toggle - enables auto-detection in universal programmers |
| ESD and latchup immunity | 2,000 V HBM ESD protection and 200 mA latchup immunity - ensures robustness during handling and board insertion |
| Green packaging | Pb/halide-free PLCC-32 - complies with RoHS Directive 2011/65/EU without requiring process requalification |
| Two-line control interface | Separate CE and OE/VPP pins - allows independent gating of chip select and output driver, simplifying bus arbitration logic |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot ROM |
|---|---|
Use Scenario: Storing ladder logic firmware in modular PLC backplanes where field updates are rare but long-term data retention is critical. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to CPU address space; provides deterministic 90 ns read latency for real-time scan cycles. Use Value: Eliminates need for external wait-state generators and supports 20-year data retention without refresh - verified under industrial thermal cycling. | Use Scenario: Replacing UV-erasable EPROMs in aging medical infusion pump controllers where redesign is prohibited. IC Role / Device Role / Timing Role: One-time programmed read-only memory holding safety-critical initialization routines and calibration tables. Use Value: Maintains pin-compatible drop-in replacement for AT27C040/AT27C020 while doubling capacity - no PCB change required. |
| Military Communications Equipment | Test & Measurement Instrument BIOS |
Use Scenario: Secure storage of cryptographic key tables and protocol stacks in ruggedized HF radio transceivers operating in extended temperature environments. IC Role / Device Role / Timing Role: Tamper-resistant OTP memory with 2,000 V ESD rating - physically unclonable due to one-time fuse programming. Use Value: Withstands MIL-STD-810G shock/vibe and operates reliably at –40°C - avoids flash wear-out failure modes in mission-critical gear. | Use Scenario: Holding self-test diagnostics and calibration coefficients in benchtop oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Read-only configuration store accessed during power-on reset; isolated from volatile RAM to prevent corruption. Use Value: 100 µA standby current minimizes quiescent drain on backup batteries during storage - extends shelf life beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C080-90PU | Same die, PDIP-32 package instead of PLCC-32; 0.600" width; matte tin leads | Through-hole assembly preferred over surface-mount; higher thermal mass but larger footprint | Select for hand-soldering, prototyping, or legacy wave-solder processes where PLCC reflow is unavailable |
| MX29F080TC-90G | Flash memory (not OTP); 5V-only, 90 ns access, 32-pin TSOP - lacks VPP pin and rapid programming mode | Field-upgradable firmware vs. permanent OTP; requires erase-before-write cycle and block management | Select only if firmware revision capability is mandatory - not a functional or pin-compatible substitute |
Compared with AT27C080-90PU and MX29F080TC-90G, the AT27C080-90JU uniquely delivers PLCC-32 surface-mount compatibility, guaranteed one-time programmability, and integrated ID code verification - making it irreplaceable in cost-sensitive, high-reliability industrial designs where firmware immutability is required.
Availability
AT27C080-90JU is available at Aetrix Electronics and suitable for industrial PLCs, legacy embedded system upgrades, military comms hardware, and test equipment BIOS requiring stable component supply across 10+ year production lifecycles.
Supply support for AT27C080-90JU 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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel EPROM products including the AT27C080 series.
The AT27C080 belongs to Atmel's OTP EPROM product line, designed specifically for cost-effective, high-reliability firmware storage in industrial, communications, and instrumentation systems where field update capability is unnecessary.
FAQ
What is the maximum programming voltage required for AT27C080-90JU?
The AT27C080-90JU requires 13.0 V ±0.25 V applied to the OE/VPP pin during programming, with VCC simultaneously raised to 6.5 V ±0.25 V. This dual-voltage requirement is strictly defined in the datasheet's DC programming characteristics table and must be met to achieve reliable 50 µs/byte programming. Applying incorrect VPP levels risks incomplete programming or latent bit failures in the AT27C080-90JU.
Can AT27C080-90JU be used as a direct replacement for AT27C040 in existing designs?
No - the AT27C080-90JU is not a direct replacement for AT27C040 due to its doubled memory size (1M × 8 vs. 512K × 8) and extended address range (A0–A19 vs. A0–A18). While pinout and timing are identical, software must be modified to handle the full 20-bit address space. The AT27C080-90JU will function electrically but may access unintended memory regions unless firmware explicitly manages A19.
Does AT27C080-90JU support standard JEDEC programming algorithms?
Yes - the AT27C080-90JU implements the industry-standard rapid programming algorithm with 50 µs CE pulses and per-byte verification, fully supported by Data I/O PS-3000, BP Microsystems Model 3000, and Xeltek SuperPRO 500P programmers. Its integrated product ID code (0x1E/0x8A) enables automatic algorithm selection, eliminating manual configuration for the AT27C080-90JU.
What decoupling capacitors are required for stable AT27C080-90JU operation?
The AT27C080-90JU requires two decoupling capacitors: a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND as close as possible to the PLCC-32 pins, and a 4.7 µF bulk electrolytic capacitor located near the power entry point for EPROM arrays. These values are specified in the "System considerations" section to suppress transients caused by CE switching - failure to implement both risks nonconformance in the AT27C080-90JU.
Is AT27C080-90JU RoHS-compliant?
Yes - the AT27C080-90JU carries the "Green (Pb/halide-free)" designation per Atmel's ordering information, confirming compliance with EU RoHS Directive 2011/65/EU. The PLCC-32 package uses matte tin lead finish and contains no lead, brominated flame retardants, or other restricted substances - verified in the official AT27C080 datasheet revision 0360N.
AT27C080-90JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 8Mbit
- Memory Organization:
- 1M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT27C080-90JU FAQ
1.How can I place an order for AT27C080-90JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C080-90JU 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 AT27C080-90JU reliable?
The price and inventory of AT27C080-90JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C080-90JU is usually 5 days.
3.What payment methods are accepted for AT27C080-90JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C080-90JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C080-90JU?
AT27C080-90JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C080-90JU 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 AT27C080-90JU?
For technical support, including AT27C080-90JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C080-90JU requirements.
6.How does Aetrix verify that AT27C080-90JU is sourced from the original manufacturer or authorized distributors?
All AT27C080-90JU 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 AT27C080-90JU meets industry standards.
7.What is the process for return or replacement of AT27C080-90JU?
All AT27C080-90JU units undergo pre-shipment inspection (PSI). If there is an issue with AT27C080-90JU, 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 AT27C080-90JU part is unused and in its original packaging.
Return procedure for AT27C080-90JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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