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Microchip Technology AT27BV512-70RC
- Part No.:
- AT27BV512-70RC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-SOIC (0.342", 8.69mm Width)
- Datasheet:
-
AT27BV512-70RC.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,024
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Product details
Overview
AT27BV512-70RC from Atmel is a 64K × 8-bit one-time programmable EPROM (OTP EPROM) with 70 ns read access time, dual-voltage operation (2.7–3.6 V or 4.5–5.5 V), and JEDEC-standard 28-lead SOIC packaging. It delivers TTL-compatible outputs at 3.0 V and LVBO compliance at 2.7 V, enabling use in battery-powered portable systems requiring low standby current (≤20 µA) and rapid programming (100 µs/byte).
For engineers reviewing the AT27BV512-70RC datasheet, AT27BV512-70RC pinout, AT27BV512-70RC application, or AT27BV512-70RC equivalent, key selection considerations include its unregulated battery-voltage support, 2.7–3.6 V / 5 V ±10% dual-supply compatibility, JEDEC pin compatibility with AT27C512R, Rapid™ programming algorithm, and industrial temperature range (-40°C to +85°C) availability.
Technical Context
The AT27BV512-70RC implements a two-line control architecture (CE and OE/VPP) for bus contention prevention and supports three distinct operating modes: Read, Standby, and Rapid Programming. Its dual-voltage design enables direct interface with both 3.3 V logic and legacy 5 V systems without level translation.
It uses high-reliability CMOS technology with 2,000 V ESD protection and 200 mA latchup immunity. The integrated Product Identification Code (Manufacturer ID = 0x1E, Device ID = 0x0D) allows automatic algorithm selection in industry-standard programmers, ensuring identical programming behavior to AT27C512R using standard equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288-bit (64K × 8) OTP EPROM - fixed, non-erasable storage ideal for firmware boot code or configuration data. |
| Read Access Time | 70 ns max at VCC = 2.7–3.6 V - enables real-time execution in embedded microcontrollers with ≤14 MHz bus timing. |
| Supply Voltage Range | 2.7 V to 3.6 V or 4.5 V to 5.5 V - eliminates need for voltage regulation in battery-powered designs. |
| Standby Current | 20 µA max (CMOS mode) at VCC = 3.6 V - extends battery life in always-on portable devices. |
| Programming Speed | 100 µs/byte typical - reduces production programming time vs. legacy EPROMs. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded applications including automotive body control modules. |
| ESD Protection | 2,000 V HBM - meets IEC 61000-4-2 Level 2 for robust handling in manufacturing and field environments. |
Pinout & Package
AT27BV512-70RC is supplied in a 28-lead, 0.330" wide plastic gull-wing small outline (SOIC) package per JEDEC MS-012AB, with 1.27 mm pitch and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus accepting 0x0000–0xFFFF for full 64K memory access. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus compatible with TTL/LVBO logic levels depending on VCC. |
| CE | Chip Enable | Active-low chip select; controls device activation and entry into Standby mode when high. |
| OE/VPP | Output Enable / Program Supply | Dual-function pin: acts as OE during read, switches to 13 V programming supply during Rapid™ programming. |
| VCC | Power Supply | Accepts 2.7–3.6 V or 4.5–5.5 V; powers internal logic and output drivers. |
| GND | Ground Reference | Common return path for all signals and power; requires local 0.1 µF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop - reduces production line cycle time and improves yield. |
| Dual-Voltage Read Operation | Operates natively at 2.7–3.6 V or 4.5–5.5 V - eliminates external regulators and simplifies power architecture in mixed-voltage systems. |
| JEDEC Pin Compatibility | Pin-for-pin compatible with AT27C512R - enables drop-in replacement in existing 5 V designs without PCB changes. |
| Integrated Product ID Code | Manufacturer ID 0x1E and Device ID 0x0D - enables automatic programmer recognition and eliminates manual algorithm selection errors. |
| Low-Power Standby Mode | ≤20 µA max ICC in Standby - supports ultra-low-power sleep states in portable instrumentation and remote sensors. |
Applications
| Industrial Control Firmware Storage | Portable Medical Device Boot ROM |
|---|---|
Use Scenario: Storing immutable bootloader and safety-critical calibration tables in PLC I/O modules operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Non-volatile firmware storage with guaranteed 70 ns read access to meet deterministic scan-cycle timing. Use Value: Eliminates need for external voltage regulation while maintaining compatibility with legacy 5 V backplane interfaces via dual-supply operation. | Use Scenario: Holding certified diagnostic firmware in handheld ultrasound or glucose meters powered by single-cell Li-ion batteries (2.7–4.2 V). IC Role / Device Role / Timing Role: OTP EPROM providing tamper-proof, factory-programmed application code with zero standby leakage impact on battery runtime. Use Value: 20 µA max standby current extends usable battery life beyond 12 months in low-duty-cycle monitoring devices. |
| Automotive Body Control Module | Legacy System Upgrade Path |
Use Scenario: Storing vehicle-specific configuration data (e.g., door lock logic, mirror settings) in BCMs where reprogramming is not required post-manufacture. IC Role / Device Role / Timing Role: One-time programmable memory with industrial temperature rating and 2,000 V ESD protection for under-hood reliability. Use Value: High latchup immunity (200 mA) ensures robustness against load-dump transients common in 12 V automotive electrical systems. | Use Scenario: Replacing obsolete AT27C512R in aging test equipment or industrial controllers without redesigning PCB layout or firmware drivers. IC Role / Device Role / Timing Role: Pin-compatible, functionally identical OTP EPROM supporting same programming hardware and timing sequences. Use Value: Enables seamless migration from 5 V-only systems to dual-voltage platforms while retaining full software and hardware compatibility. |
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); no 2.7–3.6 V operation; same 70 ns speed and 28-pin PDIP package. | Lacks battery-voltage support; requires regulated 5 V supply; unsuitable for unregulated portable systems. | Select when upgrading legacy 5 V-only designs where board space allows PDIP and no low-voltage operation is needed. |
| MN63C512B-70PL | Same 64K × 8 OTP EPROM architecture; 70 ns access; 28-pin PLCC package; operates 4.5–5.5 V only. | No dual-voltage capability; different pinout (PLCC vs. SOIC); requires socket or rework for AT27BV512-70RC replacement. | Choose only if PLCC footprint exists and 5 V supply is guaranteed; not a drop-in replacement due to package and voltage mismatch. |
Compared with AT27C512R-70PC and MN63C512B-70PL, the AT27BV512-70RC uniquely supports unregulated battery operation down to 2.7 V while maintaining pin compatibility with AT27C512R - making it the sole option for extending legacy 5 V designs into portable, low-power applications without layout changes.
Availability
AT27BV512-70RC is available at Aetrix Electronics and suitable for industrial control firmware storage, portable medical device boot ROM, and automotive body control module applications requiring stable component supply, long-term lifecycle assurance, and industrial temperature qualification.
Supply support for AT27BV512-70RC 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, non-volatile memory, and secure authentication ICs for embedded systems.
The AT27BV512 product line was designed to deliver low-voltage, high-speed OTP EPROM functionality for portable and mixed-supply embedded systems - bridging the gap between legacy 5 V EPROMs and emerging battery-operated platforms.
FAQ
What voltage ranges does the AT27BV512-70RC support during normal read operation?
The AT27BV512-70RC supports two independent read voltage ranges: 2.7 V to 3.6 V (unregulated battery mode) and 4.5 V to 5.5 V (standard 5 V ±10% mode). It does not operate reliably outside these ranges during read. Both ranges deliver the specified 70 ns access time, and outputs are TTL-compatible at 3.0 V and LVBO-compliant at 2.7 V. The AT27BV512-70RC must not be operated at intermediate voltages like 4.0 V.
Is the AT27BV512-70RC pin-compatible with the AT27C512R, and what does that mean for PCB design?
Yes, the AT27BV512-70RC is JEDEC-pin-compatible with the AT27C512R in the same SOIC package (28R), meaning identical pin count, pin order, and signal assignment. This allows direct substitution in existing AT27C512R-based layouts without PCB modification. However, the AT27BV512-70RC adds dual-voltage capability and requires attention to VPP decoupling (0.1 µF capacitor to ground) during programming - a detail not needed for standard AT27C512R use.
How does the Rapid™ Programming Algorithm work in the AT27BV512-70RC, and what voltage levels are required?
The Rapid™ Programming Algorithm in the AT27BV512-70RC uses a 100 µs CE pulse width at VCC = 6.5 V and OE/VPP = 13.0 V to program each byte, followed by automatic verification. If verification fails, up to 10 additional pulses are applied. The AT27BV512-70RC requires strict sequencing: VCC must be applied before OE/VPP and removed after it. Standard programming equipment used for AT27C512R works unchanged because the AT27BV512-70RC shares the same Product ID code (0x1E/0x0D).
What is the maximum standby current specification for the AT27BV512-70RC, and under what conditions is it measured?
The AT27BV512-70RC has a maximum standby current of 20 µA, measured under CMOS-mode conditions: VCC = 3.6 V, CE = VCC ± 0.3 V, and temperature = 25°C. At lower VCC (e.g., 2.7 V), typical standby current drops below 1 µA. This parameter assumes proper decoupling (0.1 µF ceramic capacitor between VCC and GND) and excludes transient currents during mode transitions. The AT27BV512-70RC achieves this low value through optimized CMOS gate design and deep submicron process techniques.
Does the AT27BV512-70RC support industrial temperature operation, and how is that reflected in the part number?
Yes, the AT27BV512-70RC is rated for industrial temperature operation from -40°C to +85°C. This is indicated by the suffix "R" in the package code (28R = 28-lead SOIC) and the absence of "C" (which denotes commercial 0°C to 70°C) in the temperature designation - per Atmel's ordering table, "AT27BV512-70RC" maps to the industrial grade variant. All electrical specifications in the datasheet, including 70 ns access time and 20 µA standby current, are guaranteed across this full industrial range.
AT27BV512-70RC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-SOIC (0.342", 8.69mm Width)
- 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:
- 70 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:
- 28-SOIC
AT27BV512-70RC FAQ
1.How can I place an order for AT27BV512-70RC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV512-70RC 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 AT27BV512-70RC reliable?
The price and inventory of AT27BV512-70RC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV512-70RC is usually 5 days.
3.What payment methods are accepted for AT27BV512-70RC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV512-70RC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV512-70RC?
AT27BV512-70RC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV512-70RC 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 AT27BV512-70RC?
For technical support, including AT27BV512-70RC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV512-70RC requirements.
6.How does Aetrix verify that AT27BV512-70RC is sourced from the original manufacturer or authorized distributors?
All AT27BV512-70RC 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 AT27BV512-70RC meets industry standards.
7.What is the process for return or replacement of AT27BV512-70RC?
All AT27BV512-70RC units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV512-70RC, 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 AT27BV512-70RC part is unused and in its original packaging.
Return procedure for AT27BV512-70RC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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