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Microchip Technology AT27C800-12JC
- Part No.:
- AT27C800-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C800-12JC.pdf
- Description:
- IC EPROM 8MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,518
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Product details
Overview
AT27C800-12JC from Atmel is a one-time programmable (OTP) EPROM with 8,388,608-bit capacity organized as 512K × 16 or 1024K × 8, 120 ns read access time, 5V ±10% supply, and JEDEC-standard 44-lead PLCC package. It supports byte- or word-wide configuration via BYTE/VPP pin and targets firmware storage in 16-/32-bit microprocessor systems requiring nonvolatile, low-latency code execution.
For engineers reviewing the AT27C800-12JC datasheet, AT27C800-12JC pinout, AT27C800-12JC application, or AT27C800-12JC equivalent, key selection criteria include its 120 ns access timing, dual organization mode, Rapid™ programming algorithm (50 µs/word), CMOS/TTL compatibility, and industrial temperature range support (-40°C to +85°C).
Technical Context
The AT27C800-12JC implements two-line control (CE/OE) for bus contention avoidance in high-speed systems and uses a dedicated BYTE/VPP pin to select between 16-bit word-wide (O15/A-1 = output) and 8-bit byte-wide (O15/A-1 = address A-1) operation. Its architecture enables partial-word access in byte mode using A-1 to select upper or lower byte of each 16-bit word.
It features integrated product identification code accessible via A9 and A0 toggling under VPP = 12.0 V, enabling automated programming equipment recognition. The device operates with 50 mA active current at 5 MHz and ≤100 µA standby current, meeting JEDEC-compliant OTP EPROM requirements for embedded firmware storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 8,388,608 bits (512K × 16 or 1024K × 8) |
| Read Access Time | 120 ns - eliminates WAIT states in 16-/32-bit CPU interfaces |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails |
| Active Current | 50 mA max at 5 MHz - defines power budget for firmware fetch bursts |
| Standby Current | 100 µA max - enables low-power retention in idle system states |
| Programming Speed | 50 µs/word typical - reduces firmware update cycle time in production |
| ESD Protection | 2,000 V - ensures handling robustness during board assembly |
Pinout & Package
AT27C800-12JC is supplied in a 44-lead Plastic J-leaded Chip Carrier (PLCC) package per JEDEC MO-142 DD outline. Pin 23 is designated "DON'T CONNECT" and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word or 1024K-byte addressing |
| O0–O15 | Data Outputs | 16-bit bidirectional data path; O0–O7 active in byte mode when A-1 = VIL |
| O15/A-1 | Configurable Terminal | Outputs O15 in word mode; serves as A-1 address bit in byte mode |
| BYTE/VPP | Mode Select / Program Supply | VIH selects word-wide; VIL selects byte-wide; supplies 12 V during programming |
| CE | Chip Enable | Active-low chip select enabling memory access without bus contention |
| OE | Output Enable | Active-low output gate controlling data bus drive timing |
| NC | No Connect | Pins 23 (PLCC) and multiple others are unused and must float |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time reduces firmware burn-in duration by >90% vs legacy EPROMs |
| Byte/Word Organization Switching | Hardware-selectable via BYTE/VPP pin eliminates need for external multiplexing logic |
| Integrated Product ID Code | Manufacturer and device codes readable at A9 = 12.0 V enable automatic programmer setup and traceability |
| Two-Line Control Architecture | Independent CE and OE inputs allow precise timing control for burst reads and bus sharing |
| JEDEC-Standard Packaging | 44J PLCC footprint ensures drop-in compatibility with existing EPROM sockets and reflow profiles |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O mapping firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 120 ns instruction fetch latency to real-time control loops. Use Value: Industrial temperature rating (-40°C to +85°C) and 100 µA standby current ensure reliable operation during extended power-loss events. |
Use Scenario: Replacing obsolete UV-erasable EPROMs in legacy medical devices and test equipment where firmware updates are infrequent but critical. IC Role / Device Role / Timing Role: OTP replacement for windowed Cerdip EPROMs, eliminating UV erasure infrastructure while retaining identical pinout and timing. Use Value: 5V-only read operation and CMOS/TTL compatibility allow direct substitution without level-shifting circuitry. |
| Automotive Engine Control Unit (ECU) Calibration Data | Avionics Display System Configuration Memory |
Use Scenario: Holding engine calibration maps and sensor compensation tables in automotive ECUs where field updates are prohibited after production. IC Role / Device Role / Timing Role: Immutable storage element accessed by 16-bit microcontroller during startup and runtime lookup operations. Use Value: 2,000 V ESD protection and latch-up immunity (200 mA) withstand transient noise on vehicle power buses. |
Use Scenario: Storing display initialization sequences and font glyphs in certified avionics displays requiring DO-254-compliant hardware. IC Role / Device Role / Timing Role: High-reliability OTP memory providing deterministic read timing for safety-critical boot sequence verification. Use Value: Rapid™ programming enables full functional test of stored data before flight-critical integration, reducing qualification cycle time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C800-12DC | Same 8-Mbit capacity, 120 ns access, 44-pin PLCC, but manufactured by AMD with different programming voltage (12.5 V) and ID code structure | Requires updated programming algorithm and ID verification logic in production testers | Select if existing AMD toolchain and socket infrastructure are in place |
| MX27C800-12PC | Macronix variant with identical timing and pinout, but higher standby current (200 µA max) and no integrated product ID code | Lacks automated device identification; requires manual part verification during programming | Choose for cost-sensitive applications where ID code functionality is unused |
Compared with AM27C800-12DC and MX27C800-12PC, the AT27C800-12JC provides guaranteed 100 µA standby current and built-in ID code for foolproof programming equipment compatibility-critical for high-mix manufacturing lines where firmware integrity is non-negotiable.
Availability
AT27C800-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot ROM replacement, and automotive ECU calibration data retention requiring stable component supply across long product lifecycles.
Supply support for AT27C800-12JC 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 company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs before its acquisition by Microchip Technology in 2016.
The AT27C800-12JC belongs to Atmel's OTP EPROM product line, designed specifically for firmware and configuration storage in industrial, automotive, and aerospace systems where field updates are prohibited and long-term data retention is mandatory.
FAQ
What is the maximum operating temperature range for the AT27C800-12JC?
The AT27C800-12JC is rated for industrial temperature operation from -40°C to +85°C. This specification is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official Atmel datasheet. The device maintains full 120 ns read access time and 50 mA active current compliance across this entire range, making it suitable for deployment in demanding environmental conditions without derating.
Does the AT27C800-12JC support both byte-wide and word-wide memory access?
Yes, the AT27C800-12JC supports configurable byte-wide (1024K × 8) or word-wide (512K × 16) organization selected via the BYTE/VPP pin. When BYTE/VPP = VIL, O15/A-1 functions as address A-1 and only O0–O7 are active; when BYTE/VPP = VIH, O15/A-1 outputs O15 and all 16 data lines operate. This dual-mode capability is explicitly defined in the Device Description and Operating Modes tables.
What programming voltage is required for the AT27C800-12JC?
The AT27C800-12JC requires VPP = 12.0 ± 0.5 V applied to the BYTE/VPP pin during programming, as specified in the DC Programming Characteristics table. VCC must be simultaneously raised to 6.5 ± 0.25 V. The device incorporates internal circuitry that prevents accidental programming during normal 5V read operation, ensuring data integrity unless both voltages are correctly applied.
Is the AT27C800-12JC pin-compatible with other 44-lead PLCC EPROMs?
The AT27C800-12JC uses the JEDEC-standard 44J PLCC footprint and shares identical pin assignments with industry-standard 8-Mbit EPROMs such as the AM27C800 and MX27C800. Pin functions-including A0–A18, O0–O15, CE, OE, BYTE/VPP, and NC locations-are electrically and physically aligned, enabling mechanical and electrical interoperability in existing PLCC sockets.
What is the purpose of the Integrated Product Identification Code in the AT27C800-12JC?
The Integrated Product Identification Code in the AT27C800-12JC provides manufacturer (0x1E1E) and device type (0xF8F8) identifiers readable by applying 12.0 V to A9 and toggling A0. This feature allows automated programming equipment to verify part authenticity and select correct algorithms before programming, preventing misprogramming and ensuring traceability in high-reliability manufacturing environments.
AT27C800-12JC 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:
- 8Mbit
- Memory Organization:
- 1M x 8, 512K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 120 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)
AT27C800-12JC FAQ
1.How can I place an order for AT27C800-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C800-12JC 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 AT27C800-12JC reliable?
The price and inventory of AT27C800-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C800-12JC is usually 5 days.
3.What payment methods are accepted for AT27C800-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C800-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C800-12JC?
AT27C800-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C800-12JC 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 AT27C800-12JC?
For technical support, including AT27C800-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C800-12JC requirements.
6.How does Aetrix verify that AT27C800-12JC is sourced from the original manufacturer or authorized distributors?
All AT27C800-12JC 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 AT27C800-12JC meets industry standards.
7.What is the process for return or replacement of AT27C800-12JC?
All AT27C800-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C800-12JC, 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 AT27C800-12JC part is unused and in its original packaging.
Return procedure for AT27C800-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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