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Microchip Technology AT27LV512A-12JC
- Part No.:
- AT27LV512A-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV512A-12JC.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,292
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Product details
Overview
AT27LV512A-12JC from Atmel is a 512 Kbit (64K × 8) one-time programmable EPROM with 120 ns maximum read access time, dual-voltage operation (3.0–3.6 V or 4.5–5.5 V), and JEDEC-standard 32-lead PLCC packaging. It delivers TTL-compatible outputs at 3.0 V and supports rapid programming at 100 µs/byte, making it suitable for battery-powered portable instrumentation and legacy system ROM upgrades.
For engineers reviewing the AT27LV512A-12JC datasheet, AT27LV512A-12JC pinout, AT27LV512A-12JC application, or AT27LV512A-12JC equivalent, key selection criteria include its 120 ns read timing at 3.3 V, 20 µA max standby current, JEDEC-compliant PLCC-32 footprint, and OTP compatibility with AT27C512R programming infrastructure.
Technical Context
The AT27LV512A-12JC implements a CMOS-based OTP EPROM architecture with two-line control (CE/OE/VPP), enabling bus contention avoidance in shared-memory systems. Its dual-supply design allows direct interoperability with both 3.3 V logic and 5 V host systems without level-shifting.
It uses Atmel's Rapid™ Programming Algorithm requiring VCC = 6.5 V and OE/VPP = 13.0 V during programming, with integrated product identification (Manufacturer ID = 0x1E, Device ID = 0x0D) for automated programmer recognition. The device supports product identification via A9 = 12.0 V and A0 toggling while all other address lines are low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (64K × 8) - supports full 16-bit address space for microcontroller boot ROM or firmware storage |
| Read Access Time | 120 ns max at VCC = 3.0–3.6 V - meets timing requirements for 8 MHz Z80 or 68000-based embedded controllers |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - enables drop-in replacement in mixed-voltage legacy systems without redesign |
| Standby Current | 20 µA max at VCC = 3.6 V - extends battery life in portable diagnostic tools and handheld terminals |
| Programming Speed | 100 µs/byte typical - reduces production programming cycle time by >5× vs. standard EPROMs |
| ESD Protection | 2,000 V HBM - ensures robustness during manual handling and board-level assembly |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade industrial control panels and test equipment |
Pinout & Package
AT27LV512A-12JC is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE. Pin 1 and Pin 17 are No Connect (NC) and must remain unconnected per datasheet specification.
| 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; high-impedance when CE or OE/VPP is high |
| CE | Chip Enable | Active-low chip select; controls device activation and power state transitions |
| OE/VPP | Output Enable / Program Supply | Read mode: active-low output enable; Programming mode: 13.0 V programming voltage input |
| VCC | Power Supply | 3.0–3.6 V or 4.5–5.5 V supply; must be applied before/with OE/VPP to prevent latchup |
| GND | Ground Reference | Signal and power return path; requires local 0.1 µF ceramic decoupling per device |
| NC (Pins 1, 17) | No Connect | Internally unconnected; must not be soldered or tied to any net |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Read Operation | Operates natively at 3.3 V or 5 V without external regulators - simplifies power architecture in hybrid-voltage systems |
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop - eliminates need for external programming verification hardware |
| Integrated Product ID Code | Manufacturer ID 0x1E and Device ID 0x0D accessible via A9 = 12.0 V and A0 toggle - enables plug-and-play support in industry-standard programmers |
| JEDEC-Compatible Packages | 32-lead PLCC footprint matches AT27C512R - allows reuse of existing PCB layouts and socket tooling |
| CMOS/TTL I/O Compatibility | Outputs meet LVTTL VOH/VOL specs at 3.0 V - interfaces directly with 5 V microcontrollers without level shifters |
Applications
| Industrial Control Panel Firmware | Portable Diagnostic Instrument Boot ROM |
|---|---|
Use Scenario: Fixed-function PLC modules requiring field-upgradeable firmware stored in nonvolatile memory. IC Role / Device Role / Timing Role: Primary boot ROM providing 64K × 8 instruction space for 8051 or 68HC11 microcontrollers. Use Value: 120 ns access time ensures deterministic boot latency; 20 µA standby current minimizes panel standby power draw. |
Use Scenario: Handheld ECG or blood glucose analyzers powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-voltage OTP storage for calibration tables and application code executed on ARM7TDMI cores. Use Value: 3.0 V operation eliminates DC-DC conversion; Rapid™ programming enables efficient factory calibration data loading. |
| Legacy Computer System BIOS Replacement | Automated Test Equipment (ATE) Configuration Memory |
Use Scenario: Retrofitting ISA-bus industrial PCs with modern low-power ROM replacements. IC Role / Device Role / Timing Role: Drop-in BIOS ROM replacement compatible with 5 V motherboard buses and 3.3 V peripheral logic. Use Value: Dual-supply tolerance avoids board rewiring; JEDEC PLCC-32 footprint preserves socket compatibility. |
Use Scenario: Modular ATE mainframes storing test pattern libraries and instrument configuration profiles. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-on self-test (POST) by FPGA-based controller. Use Value: 2,000 V ESD rating withstands repeated insertion/removal in lab environments; 120 ns timing supports real-time pattern loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C512R-70PC | 5 V only (4.5–5.5 V); 70 ns access; 28-pin PDIP package | Lacks low-voltage operation; requires 5 V supply and larger through-hole footprint | Select when legacy 5 V-only systems demand fastest access and DIP sockets are already deployed |
| MX29LV512CTI-12G | 3 V flash memory; 120 ns access; 32-pin TSOP; erase/rewrite capable | Reprogrammable flash vs. one-time OTP; different command set and write endurance model | Select when field firmware updates are required; not a direct OTP replacement due to differing programming methodology |
Compared with AT27C512R-70PC, the AT27LV512A-12JC enables lower-system power and mixed-voltage operation but trades off pin compatibility and speed; versus MX29LV512CTI-12G, it offers simpler programming infrastructure and guaranteed data retention without wear leveling, at the cost of reprogrammability.
Availability
AT27LV512A-12JC is available at Aetrix Electronics and suitable for industrial control panel firmware, portable diagnostic instrument boot ROM, and legacy computer system BIOS replacement requiring stable component supply and long-term obsolescence management.
Supply support for AT27LV512A-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 (now part of Microchip Technology) is a fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV512A product line was designed to deliver low-power, low-voltage OTP EPROM functionality for battery-operated and mixed-voltage embedded systems while maintaining full compatibility with existing AT27C512R programming ecosystems.
FAQ
What is the maximum operating temperature range for the AT27LV512A-12JC?
The AT27LV512A-12JC is rated for commercial temperature operation from 0°C to +70°C. This range is specified in the Ordering Information table and applies to all variants ending in "-12JC", including this exact part number. Industrial-grade versions (e.g., AT27LV512A-12JI) extend to –40°C to +85°C, but the -12JC suffix confirms commercial-grade qualification. Thermal derating is not required within this envelope.
Does the AT27LV512A-12JC require a separate programming voltage during normal read operation?
No. During normal read operation, the AT27LV512A-12JC operates from a single supply (3.0–3.6 V or 4.5–5.5 V) with OE/VPP tied to VIL (ground or logic low). The 13.0 V programming voltage is required only during programming mode, when OE/VPP serves as VPP input. Applying 13.0 V during read mode will damage the device. The AT27LV512A-12JC datasheet explicitly states OE/VPP must be at VIL for read functionality.
Can the AT27LV512A-12JC be used as a direct replacement for AT27C512R in an existing 5 V design?
Yes - the AT27LV512A-12JC is JEDEC-compatible with AT27C512R and shares identical pinout, timing interface, and programming protocol. When operated at 5 V (4.5–5.5 V), it delivers 120 ns access time and maintains TTL-compatible outputs. However, its 120 ns speed is slower than the AT27C512R-70PC (70 ns), so system timing margins must be verified. No PCB changes are needed for PLCC-32 layouts.
What decoupling capacitance is required for stable operation of the AT27LV512A-12JC?
The AT27LV512A-12JC requires a minimum 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins. For systems with multiple EPROMs, a 4.7 µF bulk electrolytic capacitor should also be added near the power entry point. These values are specified in the "System Considerations" section of the AT27LV512A-12JC datasheet to suppress transient excursions during CE switching.
How is the manufacturer and device identification code accessed on the AT27LV512A-12JC?
The AT27LV512A-12JC provides an Integrated Product Identification Code using A9 and A0. To read the Manufacturer ID (0x1E), hold A9 at 12.0 V (VID = 11.5–12.5 V), set A0 = VIL, and keep A1–A15 = VIL. To read the Device ID (0x0D), toggle A0 = VIH while maintaining A9 = 12.0 V and A1–A15 = VIL. This feature is electrically identical across all AT27LV512A variants, including the AT27LV512A-12JC.
AT27LV512A-12JC 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:
- 120 ns
- Voltage - Supply:
- 3V ~ 3.6V, 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)
AT27LV512A-12JC FAQ
1.How can I place an order for AT27LV512A-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-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 AT27LV512A-12JC reliable?
The price and inventory of AT27LV512A-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-12JC is usually 5 days.
3.What payment methods are accepted for AT27LV512A-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-12JC?
AT27LV512A-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-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 AT27LV512A-12JC?
For technical support, including AT27LV512A-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-12JC requirements.
6.How does Aetrix verify that AT27LV512A-12JC is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-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 AT27LV512A-12JC meets industry standards.
7.What is the process for return or replacement of AT27LV512A-12JC?
All AT27LV512A-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-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 AT27LV512A-12JC part is unused and in its original packaging.
Return procedure for AT27LV512A-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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