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Microchip Technology AT27BV512-12JC
- Part No.:
- AT27BV512-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27BV512-12JC.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,011
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Product details
Overview
AT27BV512-12JC from Atmel is a 64K × 8-bit (512 Kbit) one-time programmable EPROM optimized for low-voltage battery-powered systems, featuring 120 ns read access time, dual 2.7–3.6 V or 4.5–5.5 V supply operation, and JEDEC-standard PLCC-32 packaging. It delivers TTL-compatible outputs at 3.0 V and supports LVBO interface compliance at 2.7 V, enabling direct integration into portable embedded controllers and legacy memory upgrade paths.
For engineers reviewing the AT27BV512-12JC datasheet, AT27BV512-12JC pinout, AT27BV512-12JC application, or AT27BV512-12JC equivalent, key selection criteria include unregulated battery voltage support (2.7–3.6 V), rapid 100 µs/byte programming, 20 µA max standby current at 3.6 V, JEDEC-compliant PLCC-32 footprint, and pin compatibility with AT27C512R for drop-in replacement in industrial control and instrumentation designs.
Technical Context
The AT27BV512-12JC implements a two-line control architecture (CE and OE/VPP) to eliminate bus contention during read and programming modes. Its dual-voltage design enables seamless operation across regulated 5 V ±10% and unregulated 2.7–3.6 V battery rails without external regulation.
It uses Atmel's Rapid™ Programming Algorithm with 100 µs CE pulse width and integrated product identification code (0x1E/0x0D) for automated programmer recognition. The device supports both CMOS and TTL input thresholds and produces TTL-level outputs at 3.0 V, ensuring interoperability with mixed-voltage logic systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64K × 8 bits (524,288 bits); supports byte-wide data bus interfacing in microcontroller-based systems. |
| Read Access Time | 120 ns max at VCC = 2.7–3.6 V or 4.5–5.5 V; meets timing requirements for 8-bit MCUs running ≤8 MHz. |
| Supply Voltage Range | 2.7–3.6 V (unregulated battery) or 4.5–5.5 V (standard 5 V); eliminates need for LDO in portable designs. |
| Standby Current | 20 µA max at VCC = 3.6 V; extends battery life in always-on monitoring applications. |
| Programming Speed | 100 µs/byte typical; reduces production programming cycle time by >5× vs. legacy EPROMs. |
| Operating Temperature | -40°C to +85°C (industrial grade); qualified for use in automotive body control modules and factory automation. |
| ESD Protection | 2,000 V HBM; ensures robustness during board handling and field deployment. |
Pinout & Package
AT27BV512-12JC is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE standard, with pins 1 and 17 designated as no-connect (NC). The package features J-leads for surface-mount assembly and thermal performance suitable for industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; selects one of 64K bytes during read or program cycles. |
| O0–O7 | Data Outputs | 8-bit bidirectional data path; outputs valid data when CE and OE/VPP are low; high-Z otherwise. |
| CE | Chip Enable | Active-low chip select; controls device activation and entry into standby mode when high. |
| OE/VPP | Output Enable / Program Supply | Low during read (output enable); 13.0 V during programming (VPP supply); dual-function pin reduces pin count. |
| VCC | Power Supply | Single supply input supporting 2.7–3.6 V or 4.5–5.5 V; powers core logic and I/O buffers. |
| GND | Ground Reference | Common return path for all internal circuits and I/O signals; requires local 0.1 µF ceramic decoupling. |
| NC (Pins 1, 17) | No Connect | Physically present but internally unconnected; must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with automatic verify/reprogram loop; reduces production test time and improves yield. |
| Dual-Voltage Read Operation | Operates natively at 2.7–3.6 V (battery) or 4.5–5.5 V (5 V system); avoids level shifters in hybrid power architectures. |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device Code (0x0D) accessible via A9/VH and A0 toggle; enables auto-detection in universal programmers. |
| JEDEC Pin Compatibility | Pin-for-pin compatible with AT27C512R; allows direct replacement in existing 28-pin SOIC/TSOP or 32-pin PLCC layouts. |
| LVBO Interface Compliance | Meets JEDEC-approved Low Voltage Battery Operation specs at 2.7 V; guarantees signal integrity with modern low-power logic families. |
Applications
| Portable Data Logger | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Battery-powered environmental sensor node logging temperature/humidity every 5 minutes using an 8-bit MCU. IC Role / Device Role / Timing Role: Non-volatile firmware and lookup table storage; provides deterministic 120 ns read latency for real-time interrupt response. Use Value: 20 µA max standby current extends 3.6 V Li-ion battery life beyond 5 years; unregulated 2.7–3.6 V operation eliminates DC-DC converter. | Use Scenario: Fixed-function controller in a DIN-rail mounted PLC executing ladder logic with fixed instruction set. IC Role / Device Role / Timing Role: OTP storage for boot firmware and configuration constants; accessed only at power-up or reset. Use Value: Industrial -40°C to +85°C rating ensures reliability in cabinet-mounted control panels; PLCC-32 package withstands vibration and thermal cycling. |
| Legacy Instrumentation Upgrade | Embedded Test Equipment Boot ROM |
Use Scenario: Retrofitting aging oscilloscope front-panel controller with updated calibration routines and UI assets. IC Role / Device Role / Timing Role: Drop-in replacement for AT27C512R in existing 32-pin PLCC socket; retains identical address/data timing. Use Value: Pin compatibility and identical programming algorithm allow reuse of existing UV eraser-free programming fixtures and firmware build tools. | Use Scenario: Self-test subsystem in automated circuit board tester requiring immutable boot code execution on power-up. IC Role / Device Role / Timing Role: Secure, tamper-resistant boot ROM; programmed once during manufacturing with verified firmware image. Use Value: One-time programmability prevents accidental overwrite; 2,000 V ESD protection ensures survival during automated handler loading/unloading. |
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 operation (4.5–5.5 V); no 2.7–3.6 V support; 70 ns access; 28-pin PDIP package. | Requires regulated 5 V supply; unsuitable for battery-powered systems; incompatible with unregulated rails. | Select only for legacy 5 V-only designs where board space permits DIP and regulation is already present. |
| MX29LV512CTI-12G | 3 V-only Flash (not OTP); 120 ns access; 28-pin TSOP; supports erase/rewrite; higher write endurance. | Reprogrammable; requires different command protocol and erase sequence; not pin-compatible. | Choose only if field firmware updates are required; not a drop-in replacement due to different control signaling and voltage sequencing. |
Compared with AT27C512R-70PC, the AT27BV512-12JC enables battery operation without regulation and fits the same PLCC footprint; versus MX29LV512CTI-12G, it offers simpler programming infrastructure and guaranteed data retention without wear leveling, but lacks reprogrammability.
Availability
AT27BV512-12JC is available at Aetrix Electronics and suitable for industrial control systems, portable instrumentation, and legacy electronics upgrades requiring stable component supply, long-term obsolescence management, and JEDEC-standard OTP memory with unregulated battery support.
Supply support for AT27BV512-12JC 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) was a fabless semiconductor company specializing in microcontrollers, non-volatile memory, and analog products for embedded applications.
The AT27BV512 product line was designed to deliver low-power, battery-voltage OTP EPROMs for portable and industrial systems requiring reliable, one-time firmware storage without external voltage regulation.
FAQ
What is the maximum operating voltage for AT27BV512-12JC during read mode?
The AT27BV512-12JC supports two distinct read-mode voltage ranges: 2.7 V to 3.6 V for unregulated battery operation and 4.5 V to 5.5 V for standard 5 V systems. It must not be operated above 5.5 V in read mode, and programming requires separate VPP = 13.0 V applied to the OE/VPP pin while VCC is held at 6.5 V.
Is AT27BV512-12JC pin-compatible with AT27C512R?
Yes, AT27BV512-12JC is explicitly pin-compatible with JEDEC-standard AT27C512R in PLCC-32, SOIC-28, and TSOP-28 packages. The AT27BV512-12JC maintains identical pin functions, address/data mapping, and control timing-enabling direct replacement in existing designs without PCB modification.
Does AT27BV512-12JC require external decoupling capacitors?
Yes, AT27BV512-12JC requires a 0.1 µF ceramic capacitor between VCC and GND, placed as close as possible to the device pins. For systems with multiple EPROMs, a 4.7 µF bulk electrolytic capacitor is also recommended near the power entry point to suppress transient excursions during CE switching.
What programming voltage and timing does AT27BV512-12JC require?
AT27BV512-12JC requires VCC = 6.5 V ±0.25 V and OE/VPP = 13.0 V ±0.25 V during programming. Each byte is programmed with a 95–105 µs CE pulse width, followed by verification. The Rapid™ algorithm applies up to 10 pulses per failing byte before declaring failure.
Can AT27BV512-12JC operate at 2.7 V and still drive TTL-level outputs?
No-TTL-level output compatibility is guaranteed only at VCC = 3.0 V. At 2.7 V, the AT27BV512-12JC complies with JEDEC LVBO specifications, which define lower voltage thresholds for inputs and outputs. For full TTL interoperability (VOH ≥ 2.4 V, VOL ≤ 0.4 V), VCC must be ≥ 3.0 V.
AT27BV512-12JC 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:
- 2.7V ~ 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)
AT27BV512-12JC FAQ
1.How can I place an order for AT27BV512-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV512-12JC 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 AT27BV512-12JC reliable?
The price and inventory of AT27BV512-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV512-12JC is usually 5 days.
3.What payment methods are accepted for AT27BV512-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV512-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV512-12JC?
AT27BV512-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV512-12JC 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 AT27BV512-12JC?
For technical support, including AT27BV512-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV512-12JC requirements.
6.How does Aetrix verify that AT27BV512-12JC is sourced from the original manufacturer or authorized distributors?
All AT27BV512-12JC 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 AT27BV512-12JC meets industry standards.
7.What is the process for return or replacement of AT27BV512-12JC?
All AT27BV512-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV512-12JC, 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 AT27BV512-12JC part is unused and in its original packaging.
Return procedure for AT27BV512-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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