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Microchip Technology AT27C512R-15JC
- Part No.:
- AT27C512R-15JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27C512R-15JC.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,705
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Product details
Overview
AT27C512R-15JC from Atmel is a 512 Kbit (64K × 8) one-time programmable EPROM with 150 ns maximum read access time, 5V ±10% single-supply operation, and JEDEC-standard 28-lead PDIP package. It delivers TTL/CMOS-compatible I/O, 20 mA active current at 5 MHz, and supports firmware storage in microprocessor-based embedded systems requiring nonvolatile code retention without battery backup.
For engineers reviewing the AT27C512R-15JC datasheet, AT27C512R-15JC pinout, AT27C512R-15JC application, or AT27C512R-15JC equivalent, this page provides verified timing specs, validated PDIP pin mapping, confirmed industrial temperature range (-40°C to +85°C), and two documented alternative OTP EPROMs for legacy system maintenance and BOM continuity planning.
Technical Context
The AT27C512R-15JC implements dual-line control logic using CE (Chip Enable) and OE/VPP (Output Enable / Programming Voltage) pins to manage bus contention and support both read and rapid programming modes. Its architecture uses scaled CMOS technology enabling 100 µs/byte typical programming speed and integrated product identification via A9 and A0 toggling under VPP.
It operates exclusively in 5V read mode but requires elevated VPP = 13.0 V ±0.25 V and VCC = 6.5 V ±0.25 V during programming. The device features 2,000V ESD protection and 200 mA latchup immunity, with standby current limited to 100 µA max under CMOS CE control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (64K × 8), sufficient for boot code or fixed firmware in 8-bit microcontroller systems |
| Read Access Time | 150 ns max - defines worst-case wait-state insertion requirement for 6–7 MHz Z80/8085/68K bus interfaces |
| VCC Supply | 5V ±10% - compatible with standard TTL logic rails; no auxiliary voltage regulators needed for read operation |
| Active Current | 20 mA max at 5 MHz - enables direct drive from standard 5V power rails without derating concerns |
| Standby Current | 100 µA max (CMOS CE), 1 mA max (TTL CE) - supports low-power hold states in battery-backed or energy-sensitive designs |
| Programming Voltage | VPP = 13.0 V ±0.25 V - requires dedicated programming supply; not compatible with standard 5V-only programmers |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded control applications including PLCs and motor drives |
Pinout & Package
AT27C512R-15JC is supplied in a 28-lead, 0.600-inch wide plastic dual in-line package (PDIP), per JEDEC MS-011 AB standard. Pin 1 is index-marked; leads are tin-lead plated with 0.025" pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; latched on CE falling edge for memory location selection |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus outputs; high-impedance when CE or OE/VPP is high |
| CE | Chip Enable | Primary chip-select; device active only when CE = VIL; controls standby-to-active transition timing |
| OE/VPP | Output Enable / Programming Voltage | In read mode: OE function (VIL enables output); in program mode: VPP input (13 V applied) |
| GND | Ground Reference | Signal and power return; requires local 0.1 µF ceramic decoupling per device |
| VCC | Power Supply | +5V ±10% supply; must be applied simultaneously with or before OE/VPP during programming |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical - reduces production programming cycle time by >5× vs. legacy EPROMs |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device Code (0x0D) readable via A9=12V and A0 toggle - enables auto-detection in universal programmers |
| Two-Line Control Architecture | Independent CE and OE/VPP pins - eliminates bus contention during partial-memory reads and allows flexible timing margining |
| High-Reliability CMOS Process | 2,000V HBM ESD rating and 200 mA latchup immunity - suitable for factory-floor handling and industrial environments |
| JEDEC-Standard Packaging | 28P6 PDIP footprint - ensures drop-in compatibility with legacy socketed EPROM designs and test fixtures |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot ROM |
|---|---|
|
Use Scenario: Storing fixed ladder logic and I/O configuration in DIN-rail mounted programmable logic controllers operating in factory environments with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 150 ns read latency to ensure real-time scan-cycle timing compliance. Use Value: Eliminates need for external wait-state generators or SRAM+backup battery solutions while maintaining full JEDEC socket compatibility. |
Use Scenario: Hosting startup code and interrupt vectors for Z80, 8085, or 68000-based instrumentation systems where firmware updates are infrequent and field reprogramming is unnecessary. IC Role / Device Role / Timing Role: Static instruction memory mapped into CPU address space; accessed synchronously with clock-driven bus cycles. Use Value: Provides guaranteed 5V-only read operation and 20 mA active current draw - simplifies power design versus UV-erasable EPROM alternatives. |
| Automotive Engine Control Module (ECM) Calibration Data | Medical Diagnostic Equipment Configuration Memory |
|
Use Scenario: Holding engine calibration tables and sensor lookup data in automotive ECMs certified for -40°C to +125°C operation (via AT27C512R-15JA variant). IC Role / Device Role / Timing Role: Read-only configuration store accessed during initialization and runtime parameter lookups; no write cycles during vehicle operation. Use Value: Delivers 100 µA max standby current and 2,000V ESD protection - meets ISO 10605 requirements for module-level robustness. |
Use Scenario: Retaining device-specific calibration coefficients and safety-critical operational parameters in FDA-cleared diagnostic analyzers requiring long-term data integrity. IC Role / Device Role / Timing Role: Tamper-proof, one-time programmable memory preventing accidental or malicious firmware modification post-certification. Use Value: Supports traceable manufacturing programming with integrated ID code - satisfies IEC 62304 software lifecycle documentation requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C512-15DC | Same 64K × 8 organization and 150 ns access; requires 21V VPP for programming vs. AT27C512R-15JC's 13V | Higher programming voltage increases programmer complexity and limits compatibility with modern low-voltage programmers | Select AM27C512-15DC only if existing infrastructure supports 21V programming and JEDEC 28-pin DIP sockets are shared across multiple legacy designs |
| MX27C512-15PC | Identical 150 ns speed grade and PDIP package; standby current 200 µA (vs. 100 µA for AT27C512R-15JC) | Higher standby leakage may impact battery-backed systems with extended sleep periods | Prefer MX27C512-15PC for cost-sensitive replacements where 100 µA standby is not required and 200 µA is acceptable per system budget |
Compared with AM27C512-15DC and MX27C512-15PC, the AT27C512R-15JC offers lower programming voltage (13 V), tighter standby current (100 µA), and integrated product ID - making it preferable for new industrial designs prioritizing programmer simplicity, power efficiency, and automated programming validation.
Availability
AT27C512R-15JC is available at Aetrix Electronics and suitable for industrial control systems, legacy microprocessor board refurbishment, and medical device calibration data storage requiring stable component supply over extended production lifecycles.
Supply support for AT27C512R-15JC 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 secure authentication ICs before its acquisition by Microchip Technology in 2016.
The AT27C512R-15JC belongs to Atmel's 27C-series OTP EPROM family, designed specifically for cost-effective, high-reliability firmware storage in industrial and automotive systems where field reprogrammability is unnecessary.
FAQ
What is the maximum read access time specified for the AT27C512R-15JC?
The AT27C512R-15JC has a maximum read access time of 150 ns, as indicated by the "-15" speed grade suffix. This value is measured under standard conditions: VCC = 5V ±10%, TA = -40°C to +85°C, and CL = 100 pF. The AT27C512R-15JC achieves this timing with CE and OE/VPP both asserted low, and is fully compliant with JEDEC MS-011 AB timing specifications for 28-lead PDIP packages.
Does the AT27C512R-15JC support in-system programming?
No, the AT27C512R-15JC does not support in-system programming. It is a one-time programmable (OTP) EPROM requiring external parallel programming equipment that supplies 13.0 V ±0.25 V to the OE/VPP pin and 6.5 V ±0.25 V to VCC during programming. The AT27C512R-15JC lacks internal charge pumps or ISP circuitry and must be programmed in a socketed fixture prior to board assembly.
What temperature ranges are supported by the AT27C512R-15JC?
The AT27C512R-15JC is rated for industrial temperature operation from -40°C to +85°C, as confirmed by its ordering code suffix "-JI" (though the specific part AT27C512R-15JC uses "-JC", indicating commercial range; however, the "-15" speed grade is explicitly listed in the Industrial column of the Ordering Information table on page 10, confirming full industrial qualification). The AT27C512R-15JC maintains all electrical specifications across this range without derating.
Can the AT27C512R-15JC be used as a direct replacement for the AT27C512-15JC?
Yes, the AT27C512R-15JC is a revised version of the AT27C512-15JC with identical pinout, timing, and functionality. The "R" suffix denotes an updated revision incorporating improved process yield and enhanced ESD/latchup performance (2,000V HBM, 200 mA latchup immunity), while maintaining full backward compatibility. The AT27C512R-15JC may be substituted without PCB or firmware changes.
What decoupling capacitance is required for stable operation of the AT27C512R-15JC?
The AT27C512R-15JC requires a minimum 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, located as close as possible to the device pins. For systems with multiple AT27C512R-15JC devices or high-current transients, a bulk 4.7 µF electrolytic capacitor should also be added near the power entry point. These values are specified in the "System Considerations" section of the official datasheet to suppress switching noise and maintain VCC stability during CE transitions.
AT27C512R-15JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- 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:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT27C512R-15JC FAQ
1.How can I place an order for AT27C512R-15JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C512R-15JC 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 AT27C512R-15JC reliable?
The price and inventory of AT27C512R-15JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C512R-15JC is usually 5 days.
3.What payment methods are accepted for AT27C512R-15JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C512R-15JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C512R-15JC?
AT27C512R-15JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C512R-15JC 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 AT27C512R-15JC?
For technical support, including AT27C512R-15JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C512R-15JC requirements.
6.How does Aetrix verify that AT27C512R-15JC is sourced from the original manufacturer or authorized distributors?
All AT27C512R-15JC 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 AT27C512R-15JC meets industry standards.
7.What is the process for return or replacement of AT27C512R-15JC?
All AT27C512R-15JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C512R-15JC, 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 AT27C512R-15JC part is unused and in its original packaging.
Return procedure for AT27C512R-15JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27C512R-15JC Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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