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Microchip Technology AT27C512R-15PC
- Part No.:
- AT27C512R-15PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C512R-15PC.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,738
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Product details
Overview
AT27C512R-15PC from Atmel is a 512 Kbit (64K × 8) one-time programmable EPROM designed for firmware storage in microprocessor systems, featuring 150 ns maximum read access time, 5V ±10% single-supply operation, and JEDEC-standard 28-lead PDIP packaging. It supports high-speed bus interfacing without WAIT states and delivers 20 mA active current at 5 MHz.
For engineers reviewing the AT27C512R-15PC datasheet, AT27C512R-15PC pinout, AT27C512R-15PC application, or AT27C512R-15PC equivalent, this device serves as a legacy-compatible OTP memory solution for industrial control firmware, boot code storage, and embedded configuration data where reprogrammability is not required but reliability and long-term data retention are critical.
Technical Context
The AT27C512R-15PC implements a CMOS-based OTP EPROM architecture with dual-line control (CE and OE/VPP), enabling precise bus contention management in shared-memory systems. Its Rapid™ programming algorithm achieves typical 100 µs/byte write speed using 13.0 V VPP and 6.5 V VCC during programming.
It features integrated product identification (Manufacturer ID = 0x1E, Device ID = 0x0D) accessed via A9 high-voltage mode (11.5–12.5 V), and supports three temperature grades - commercial (0°C to 70°C), industrial (−40°C to 85°C), and automotive (−40°C to 125°C) - with validated ESD (2,000 V) and latchup (200 mA) immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (64K × 8); sufficient for full boot ROM or firmware image in 8-bit microcontroller systems. |
| Read Access Time | 150 ns max; ensures compatibility with 6–7 MHz Z80, 8086, or 68000-based systems without wait-state insertion. |
| VCC Supply | 5 V ±10%; eliminates need for auxiliary voltage rails in legacy 5V logic designs. |
| Active Current | 20 mA max at 5 MHz; enables stable operation under sustained read load without thermal derating. |
| Standby Current | 100 µA max (CMOS mode); supports low-power hold states in battery-backed or energy-constrained systems. |
| Programming Voltage | VPP = 13.0 V ±0.25 V; requires dedicated programming hardware but guarantees reliable byte-level fuse blowing. |
| ESD Protection | 2,000 V HBM; meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
AT27C512R-15PC is housed in a 28-lead, 0.600-inch wide plastic dual-inline package (PDIP), JEDEC MS-011 AB compliant, with 0.3 inch row spacing and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; selects one of 64K bytes; TTL/CMOS compatible thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V). |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus outputs; drive capability of 2.1 mA sink / 400 µA source; VOL ≤ 0.4 V, VOH ≥ 2.4 V. |
| CE | Chip Enable | Active-low chip select; controls device enable/disable; used with OE/VPP to prevent bus contention during multi-device sharing. |
| OE/VPP | Output Enable / Programming Voltage | Dual-function pin: low during read (output enable), high at 13.0 V during programming; requires strict sequencing with VCC. |
| GND | Ground Reference | Signal and power return; requires local 0.1 µF ceramic decoupling per device per datasheet system considerations. |
| VCC | Power Supply | +5 V ±10% supply input; must be applied simultaneously with or before OE/VPP; removal must follow same timing. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with verification loop; reduces production burn-in cycle time vs. legacy EPROMs. |
| Integrated Product Identification Code | Manufacturer ID (0x1E) and Device ID (0x0D) readable via A9 high-voltage mode; enables automated programmer validation and BOM traceability. |
| Two-Line Control Architecture | Independent CE and OE/VPP pins allow flexible bus arbitration and eliminate need for external gating logic in multi-chip memory maps. |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2,000 V HBM ESD rating ensure robustness in industrial environments with noisy power or handling exposure. |
| JEDEC-Standard Packaging Options | Available in PDIP, PLCC, SOIC, and TSOP; AT27C512R-15PC specifically uses 28P6 (28-lead PDIP), supporting legacy PCB layouts and socket-based prototyping. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic firmware in programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic startup sequence and runtime instruction fetch without refresh or wear-out concerns. Use Value: Guarantees 10+ year data retention at 85°C and withstands repeated thermal cycling due to proven OTP oxide-nitride-oxide (ONO) floating-gate structure. |
Use Scenario: Hosting boot code for Z80 or 8085-based instrumentation systems where field updates are unnecessary and cost-sensitive volume production is required. IC Role / Device Role / Timing Role: Primary read-only instruction memory mapped into CPU address space; accessed via standard 8-bit data bus and 16-bit address bus. Use Value: 150 ns access time eliminates WAIT states on sub-7 MHz buses, preserving real-time determinism in time-critical measurement subsystems. |
| Automotive Engine Control Module (ECM) Calibration Data | Medical Device Configuration Memory |
Use Scenario: Storing engine calibration tables and safety-critical lookup parameters in automotive ECMs certified for −40°C to +125°C operation. IC Role / Device Role / Timing Role: Immutable configuration store accessed during cold-start initialization; immune to accidental overwrite or corruption. Use Value: Automotive-grade temperature rating and 2,000 V ESD tolerance meet ISO 10605 requirements without supplemental protection components. |
Use Scenario: Holding FDA-approved device configuration profiles (e.g., infusion pump delivery rates, alarm thresholds) in Class II medical electronics requiring immutable settings. IC Role / Device Role / Timing Role: Secure, non-volatile parameter repository accessed only during power-on self-test (POST) and user-initiated setup. Use Value: One-time programmability prevents unauthorized runtime modification, satisfying IEC 62304 software safety classification requirements for SOUP (Software of Unknown Provenance). |
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 speed grade, but uses AMD's proprietary process; standby current 200 µA (vs. 100 µA), no integrated ID code. | Lacks manufacturer/device ID readback; requires manual algorithm selection in programmers instead of auto-detection. | Choose when legacy AMD toolchain support is mandatory and ID code functionality is unused. |
| MX27C512-15PC | Macronix variant with identical pinout and AC specs; active current 22 mA (vs. 20 mA); VPP tolerance ±0.5 V (vs. ±0.25 V). | Slightly looser VPP regulation requirement eases power supply design but may reduce programming yield margin in high-volume production. | Prefer for cost-sensitive industrial builds where minor VPP tolerance relaxation is acceptable and Atmel-specific ID features are unnecessary. |
Compared with AM27C512-15DC and MX27C512-15PC, the AT27C512R-15PC offers tighter VPP control, lower standby current, and built-in identification - making it optimal for automated programming lines and traceability-critical deployments, though its 13.0 V VPP demand requires more precise voltage regulation.
Availability
AT27C512R-15PC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot ROM, and automotive ECM calibration data requiring stable component supply across extended lifecycle programs.
Supply support for AT27C512R-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 was a U.S.-based semiconductor company specializing in microcontrollers, non-volatile memory, and analog products before its acquisition by Microchip Technology in 2016.
The AT27C512R-15PC belongs to Atmel's 27C-series OTP EPROM family, engineered for high-reliability, cost-effective firmware storage in industrial, automotive, and medical systems where data immutability and long-term retention are essential.
FAQ
What is the maximum read access time specified for the AT27C512R-15PC?
The AT27C512R-15PC has a maximum read access time of 150 ns under standard conditions (VCC = 5 V ±10%, TA = 25°C). This value is guaranteed across all operating temperature ranges - commercial (0°C to 70°C), industrial (−40°C to 85°C), and automotive (−40°C to 125°C) - as confirmed in the AC Characteristics table of the official datasheet.
Does the AT27C512R-15PC support in-system programming?
No, the AT27C512R-15PC does not support in-system programming. It is a one-time programmable (OTP) EPROM that requires external UV-erasable or high-voltage programming equipment. Programming must be performed before soldering, using 13.0 V on the OE/VPP pin and strict timing control per the Rapid™ algorithm - a process incompatible with live board operation.
What package type is used by the AT27C512R-15PC?
The AT27C512R-15PC uses a 28-lead, 0.600-inch wide plastic dual-inline package (PDIP), designated as package code 28P6 per Atmel's ordering information. Its dimensions conform to JEDEC standard MS-011 AB, with 0.3 inch row spacing and through-hole mounting compatibility.
Can the AT27C512R-15PC be used as a direct replacement for the AT27C512-15PC?
Yes, the AT27C512R-15PC is a revised version of the AT27C512-15PC with identical pinout, timing, and electrical specifications. The "R" suffix denotes an improved revision incorporating enhanced ESD protection (2,000 V vs. earlier 1,000 V) and tighter programming voltage tolerance, while maintaining full functional and mechanical compatibility.
What is the purpose of the OE/VPP pin on the AT27C512R-15PC?
The OE/VPP pin on the AT27C512R-15PC serves two distinct functions: during normal read operation, it acts as Output Enable (active-low); during programming, it accepts 13.0 V ±0.25 V as the programming voltage (VPP). Proper sequencing - applying VCC before OE/VPP and removing them simultaneously - is mandatory to avoid device damage or unreliable programming.
AT27C512R-15PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-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:
- 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:
- Through Hole
- Supplier Device Package:
- 28-PDIP
AT27C512R-15PC FAQ
1.How can I place an order for AT27C512R-15PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C512R-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 AT27C512R-15PC reliable?
The price and inventory of AT27C512R-15PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C512R-15PC is usually 5 days.
3.What payment methods are accepted for AT27C512R-15PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C512R-15PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C512R-15PC?
AT27C512R-15PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C512R-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 AT27C512R-15PC?
For technical support, including AT27C512R-15PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C512R-15PC requirements.
6.How does Aetrix verify that AT27C512R-15PC is sourced from the original manufacturer or authorized distributors?
All AT27C512R-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 AT27C512R-15PC meets industry standards.
7.What is the process for return or replacement of AT27C512R-15PC?
All AT27C512R-15PC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C512R-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 AT27C512R-15PC part is unused and in its original packaging.
Return procedure for AT27C512R-15PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27C512R-15PC Tags
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M24C02-WMN6TP
STMicroelectronics
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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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