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Microchip Technology AT27C512R-15TI
- Part No.:
- AT27C512R-15TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT27C512R-15TI.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
AT27C512R-15TI from Microchip Technology (formerly Atmel) is a 64K × 8-bit one-time programmable EPROM used for firmware storage in embedded microprocessor systems. It delivers 45 ns read access time, operates on a single 5V ±10% supply, and supports industrial temperature range (–40°C to +85°C) in a 28-lead SOIC package.
For engineers reviewing the AT27C512R-15TI datasheet, AT27C512R-15TI pinout, AT27C512R-15TI application, or AT27C512R-15TI equivalent, key selection criteria include OTP reliability, CMOS/TTL compatibility, rapid programming (100 µs/byte), low active current (20 mA at 5 MHz), and JEDEC-standard SOIC packaging with dual-line control (CE/OE).
Technical Context
The AT27C512R-15TI implements a parallel-addressed OTP EPROM architecture with 16 address lines (A0–A15) and 8 bidirectional data outputs (O0–O7). Its two-line control interface (Chip Enable and Output Enable/VPP) enables bus contention avoidance in multi-device systems.
It uses scaled CMOS technology with 2,000V ESD protection and 200 mA latchup immunity. Programming requires VCC = 6.5V and OE/VPP = 13.0V, with a Rapid™ algorithm applying 100 µs CE pulses per byte and verification loops-no external UV erasure needed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (64K × 8), fixed OTP configuration - no rewrites, ideal for immutable firmware images. |
| Read Access Time | 150 ns max (tACC), rated for high-speed microprocessor bus interfacing without WAIT states. |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage required for read mode. |
| Active Current | 20 mA max at 5 MHz - enables low-power operation in battery-backed or thermally constrained systems. |
| Standby Current | 100 µA max - reduces quiescent power in idle states while maintaining data retention. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation applications. |
| ESD/Latchup | 2,000V HBM ESD protection and 200 mA latchup immunity - enhances robustness in manufacturing and field environments. |
Pinout & Package
AT27C512R-15TI is housed in a 28-lead SOIC (Small Outline Integrated Circuit) package, 0.330" wide, JEDEC MS-012 compliant, with gull-wing leads and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit parallel address bus - selects one of 64K bytes; all must be stable before CE/OE assertion. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus - drives valid logic levels only when CE = VIL and OE = VIL; high-Z otherwise. |
| CE | Chip Enable | Primary device select - must be low to enable memory access; controls power state transition between active and standby. |
| OE/VPP | Output Enable / Programming Voltage | In read mode: output enable; in program mode: 13.0V programming supply - dual-function pin requires voltage sequencing control. |
| GND | Ground Reference | Signal and power return - requires local 0.1 µF ceramic decoupling per device per datasheet layout guidance. |
| VCC | Power Supply | +5V ±10% main supply - must be applied simultaneously with or before OE/VPP; removal sequence also specified. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with automatic verify-and-reprogram loop - reduces production programming cycle time vs. legacy EPROMs. |
| Integrated Product Identification Code | Manufacturer ID (0x1E) and Device Code (0x0D) readable via A9=12.0V and A0 toggling - enables automated programmer recognition and algorithm selection. |
| Two-Line Control Architecture | Independent CE and OE inputs - allows flexible bus arbitration and eliminates need for external gating logic in multi-peripheral systems. |
| CMOS/TTL Compatibility | Input thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V) and output drive (VOH ≥ 2.4V, VOL ≤ 0.4V) meet both logic families - simplifies interface with mixed-voltage controllers. |
| High-Reliability Process | 2,000V ESD rating and 200 mA latchup immunity - ensures survivability during handling, assembly, and operation in noisy industrial environments. |
Applications
| Industrial PLC Firmware Storage | Automotive Engine Control Module Boot Code |
|---|---|
Use Scenario: Storing immutable boot firmware and calibration tables in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile code storage device providing deterministic 150 ns read latency to support real-time I/O scanning cycles. Use Value: Eliminates reliance on slower serial EEPROM or flash; OTP prevents accidental overwrite during field updates or EMI events. |
Use Scenario: Holding engine start-up initialization routines and safety-critical lookup tables in automotive ECU designs requiring AEC-Q100-compliant components. IC Role / Device Role / Timing Role: Read-only memory mapped into microcontroller address space for fast instruction fetch during cold-start sequences. Use Value: Industrial temperature rating (–40°C to +85°C) and 200 mA latchup immunity ensure reliable operation under under-hood thermal stress. |
| Medical Diagnostic Instrument BIOS | Telecom Base Station Configuration Data |
Use Scenario: Securing boot loader and hardware initialization code in FDA-regulated diagnostic imaging equipment where firmware integrity is critical. IC Role / Device Role / Timing Role: OTP EPROM acting as trusted root-of-trust for secure boot chain - no field reprogramming capability mitigates tampering risk. Use Value: One-time programmability guarantees firmware immutability; integrated ID code enables traceability and counterfeit detection during manufacturing audit. |
Use Scenario: Storing hardware-specific configuration parameters and RF calibration coefficients in carrier-grade base station radios operating in remote outdoor enclosures. IC Role / Device Role / Timing Role: Parallel-interface nonvolatile memory accessed during power-on reset to configure FPGA and RF front-end ICs. Use Value: Low 100 µA standby current extends uptime in backup-power scenarios; SOIC package supports automated optical inspection and reflow soldering. |
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 OTP EPROM, 150 ns access, 28-pin PDIP; higher standby current (1 mA vs. 100 µA) and no integrated ID code. | Preferred where through-hole assembly or legacy socket compatibility is required; less suitable for space-constrained SMT designs. | Select AM27C512-15DC only if PDIP footprint and socket-based prototyping are mandatory; AT27C512R-15TI offers superior power efficiency and programmability features. |
| MX27C512PC-15 | Functionally identical 64K×8 OTP EPROM, 150 ns, SOIC-28; lacks Rapid™ programming (200 µs/byte typical) and product ID code; lower ESD rating (1,500V). | Used in cost-sensitive industrial controllers where programming speed and traceability are secondary to unit cost. | Choose MX27C512PC-15 only for price-driven volume production with relaxed programming throughput and anti-counterfeit requirements. |
Compared with AM27C512-15DC and MX27C512PC-15, the AT27C512R-15TI provides lower standby power, faster programming, built-in identification, and higher ESD robustness - making it optimal for modern SMT-based industrial and automotive systems where reliability and production efficiency matter.
Availability
AT27C512R-15TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU boot code, medical diagnostic BIOS, telecom base station configuration, and embedded controller initialization requiring stable component supply across extended lifecycle programs.
Supply support for AT27C512R-15TI 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 its legacy high-reliability nonvolatile memory portfolio, emphasizing industrial, automotive, and aerospace-grade assurance.
The AT27C512R-15TI belongs to Atmel's 27C-series OTP EPROM family, designed specifically for firmware storage in microprocessor-based systems where data immutability, fast parallel access, and JEDEC-standard packaging are essential.
FAQ
What is the maximum read access time specification for AT27C512R-15TI?
The AT27C512R-15TI has a maximum address-to-output delay (tACC) of 150 ns under industrial temperature conditions (–40°C to +85°C) and 5V ±10% supply. This value is confirmed in the AC Characteristics table for the "-15" speed grade and applies to all supported packages including the SOIC variant used in AT27C512R-15TI.
Does AT27C512R-15TI support in-system programming?
No, AT27C512R-15TI does not support in-system programming. It is a one-time programmable EPROM requiring dedicated programming equipment that applies 13.0V to the OE/VPP pin and 6.5V to VCC. Programming must occur off-board prior to system integration, and no field reprogramming capability exists.
What package type is used by AT27C512R-15TI?
AT27C512R-15TI uses a 28-lead SOIC (Small Outline Integrated Circuit) package, 0.330" wide, with gull-wing leads. This is explicitly indicated by the "R" suffix in the ordering code and confirmed in the Ordering Information table on page 9 of the datasheet.
Can AT27C512R-15TI operate with a 3.3V supply?
No, AT27C512R-15TI requires a 5V ±10% supply (4.5V to 5.5V) for both read and program operations. Its input thresholds, output drive strength, and internal circuitry are designed exclusively for 5V TTL/CMOS compatibility; operation at 3.3V is outside specification and will result in functional failure.
Is the AT27C512R-15TI pin-compatible with other speed grades in the same package?
Yes, AT27C512R-15TI is pin-compatible with all other AT27C512R variants in the 28-lead SOIC package (e.g., AT27C512R-45RC, AT27C512R-70RC), sharing identical pinout, signal definitions, and DC/AC interface behavior - only the access time and current specifications differ across speed grades.
AT27C512R-15TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tray
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
AT27C512R-15TI FAQ
1.How can I place an order for AT27C512R-15TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C512R-15TI 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-15TI reliable?
The price and inventory of AT27C512R-15TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C512R-15TI is usually 5 days.
3.What payment methods are accepted for AT27C512R-15TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C512R-15TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C512R-15TI?
AT27C512R-15TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C512R-15TI 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-15TI?
For technical support, including AT27C512R-15TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C512R-15TI requirements.
6.How does Aetrix verify that AT27C512R-15TI is sourced from the original manufacturer or authorized distributors?
All AT27C512R-15TI 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-15TI meets industry standards.
7.What is the process for return or replacement of AT27C512R-15TI?
All AT27C512R-15TI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C512R-15TI, 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-15TI part is unused and in its original packaging.
Return procedure for AT27C512R-15TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27C512R-15TI Tags
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