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Microchip Technology AT27BV040-12JU
- Part No.:
- AT27BV040-12JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27BV040-12JU.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,369
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Product details
Overview
AT27BV040-12JU from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM with 120 ns read access time, dual-voltage operation (2.7–3.6 V or 4.5–5.5 V), and industrial temperature range (−40°C to +85°C). It features CMOS/TTL-compatible I/O, 20 µA max standby current at 3.6 V, and JEDEC-standard 32-lead PLCC packaging - ideal for battery-powered portable systems requiring low-power, unregulated supply compatibility.
For engineers reviewing the AT27BV040-12JU datasheet, AT27BV040-12JU pinout, AT27BV040-12JU application, or AT27BV040-12JU equivalent, this page delivers verified electrical specs, validated package mapping, confirmed operating modes (Read, Standby, Rapid Program), real-world timing behavior (tACC = 120 ns, tOE = 50 ns), and precise pin-level functional roles per JEDEC-compliant PLCC layout.
Technical Context
The AT27BV040-12JU implements a two-line control architecture (CE and OE) enabling bus contention prevention in shared-data-bus systems. Its dual-supply design supports both unregulated battery operation (2.7–3.6 V) and standard 5 V ±10% systems without level-shifting circuitry.
It uses rapid programming with 100 µs/byte CE pulses at VCC = 6.5 V and VPP = 13.0 V, and includes integrated product identification (Manufacturer ID = 0x1E, Device ID = 0x0B) readable via A9 high-voltage mode - ensuring compatibility with industry-standard programmers calibrated for AT27C040.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304-bit (512K × 8) OTP EPROM - fixed boot code storage with no write endurance limit |
| Read Access Time | 120 ns maximum (tACC) - enables direct interface with 8 MHz microcontrollers without wait states |
| Supply Voltage Range | 2.7–3.6 V or 4.5–5.5 V - eliminates need for voltage regulators in mixed-voltage embedded systems |
| Standby Current | 20 µA max at 3.6 V (ISB1) - extends battery life in always-on portable instrumentation |
| Active Power Dissipation | 36 mW max at 5 MHz / 3.6 V - reduces thermal load in dense PCB layouts |
| Operating Temperature | −40°C to +85°C - qualified for industrial control and automotive under-hood auxiliary modules |
| ESD Protection | 2,000 V HBM - withstands handling in non-ESD-controlled assembly environments |
Pinout & Package
AT27BV040-12JU is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE, with 1.27 mm pitch and 12.32 mm × 14.86 mm body dimensions. Pin 1 identifier is a corner notch on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; all inputs TTL/CMOS compatible |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus with TTL-level outputs at VCC ≥ 2.7 V - directly drives 5 V logic |
| CE | Chip Enable | Active-low chip select; controls device activation and entry into Standby mode when high |
| OE | Output Enable | Active-low output gate; enables data output without affecting internal state or power mode |
| VCC | Power Supply | Main supply input (2.7–3.6 V or 4.5–5.5 V); must be applied before/with VPP during programming |
| VPP | Programming Voltage | 13.0 V ±0.25 V input required only during programming; tied to VCC otherwise |
| GND | Ground Reference | Signal and power return path; requires local 0.1 µF ceramic decoupling per device |
Key Features
| Feature | Design Value |
|---|---|
| Rapid Programming Algorithm | 100 µs/byte typical programming time - cuts firmware update cycles by >90% vs legacy EPROMs |
| Dual-Voltage Read Operation | Single device supports both 3 V battery and 5 V host systems - eliminates BOM duplication |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x0B) readable via A9 high-voltage mode - ensures auto-detection in universal programmers |
| LVBO Interface Compliance | Fully compliant with JEDEC Low Voltage Battery Operation spec at 2.7 V - guarantees interoperability in portable medical devices |
| Green Packaging | Pb/Halide-free, RoHS-compliant PLCC - meets EU WEEE and China RoHS regulatory requirements |
Applications
| Portable Data Loggers | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Battery-powered environmental sensor nodes logging temperature/humidity every 10 seconds for 6+ months. IC Role / Device Role / Timing Role: Non-volatile boot code and calibration table storage; accessed only at power-up and configuration change. Use Value: 20 µA max standby current extends coin-cell lifetime beyond 7 years; 120 ns access enables immediate MCU execution post-reset. | Use Scenario: DIN-rail mounted programmable logic controllers executing ladder logic in factory automation cabinets. IC Role / Device Role / Timing Role: Static firmware image storage with guaranteed retention over 10+ years; immune to ESD events in electrically noisy plant floors. Use Value: 2,000 V HBM ESD rating prevents field failures; industrial temp range ensures reliability at 75°C cabinet ambient. |
| Legacy System Upgrades | Medical Diagnostic Equipment |
Use Scenario: Retrofitting aging test equipment originally designed for AT27C040 with modern low-power supply rails. IC Role / Device Role / Timing Role: Pin- and function-compatible drop-in replacement for 5 V EPROMs while enabling 3 V operation. Use Value: Eliminates need for external voltage translators or regulator redesign; same programming algorithm and equipment used. | Use Scenario: Ultrasound machine mainboard storing FPGA configuration bitstreams and safety-critical boot firmware. IC Role / Device Role / Timing Role: Immutable, tamper-resistant firmware storage certified to IEC 62304 Class C software requirements. Use Value: One-time programmability prevents accidental overwrite; RoHS-compliant green package satisfies medical device material declarations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-12JC | 5 V-only operation (4.5–5.5 V); no 3 V support; identical pinout and programming algorithm | Requires stable 5 V rail; unsuitable for battery-backed or dual-voltage systems | Select when legacy 5 V infrastructure is fixed and power efficiency is secondary |
| MN65E4000P | Same 4 Mbit density but EEPROM-based; supports byte-level rewrites; 5 V only; slower 200 ns access | Enables field firmware updates but increases cost and complexity; higher active current | Select only if rewrite capability is mandatory and 80 ns speed penalty is acceptable |
Compared with AT27C040-12JC, the AT27BV040-12JU adds critical 3 V operation and lower standby power, while MN65E4000P trades OTP simplicity and speed for rewrite flexibility - making AT27BV040-12JU optimal for cost-sensitive, battery-aware, immutable-code applications.
Availability
AT27BV040-12JU is available at Aetrix Electronics and suitable for portable instrumentation, industrial control firmware storage, and legacy system upgrades requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT27BV040-12JU 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 industrial, automotive, and consumer applications.
The AT27BV040-12JU belongs to Atmel's low-voltage OTP EPROM product line, engineered specifically for portable and battery-operated systems needing reliable, low-power, unregulated-supply firmware storage without sacrificing speed or JEDEC compatibility.
FAQ
What is the maximum read access time specified for the AT27BV040-12JU?
The AT27BV040-12JU has a maximum read access time (tACC) of 120 ns under industrial temperature conditions (−40°C to +85°C) and VCC = 2.7–3.6 V or 4.5–5.5 V. This value is guaranteed across the full operating voltage and temperature range and applies to both CE- and OE-controlled read cycles, enabling deterministic timing in real-time embedded systems.
Does the AT27BV040-12JU support true 3 V operation without level shifters?
Yes, the AT27BV040-12JU fully supports 2.7–3.6 V operation with TTL-compatible outputs - at VCC = 3.0 V, its VOH exceeds 2.4 V and VOL stays below 0.4 V under 2.0 mA load, allowing direct interfacing with standard 5 V TTL logic. No external level shifters are needed in mixed-voltage designs.
Can the AT27BV040-12JU be programmed using standard AT27C040 programmers?
Yes, the AT27BV040-12JU uses the identical Rapid Programming Algorithm and Integrated Product Identification Code (0x1E/0x0B) as the AT27C040, and is explicitly documented as programming-compatible with the same equipment. The only hardware requirement is supplying VPP = 13.0 V during programming - all timing, voltage levels, and command sequences match.
What decoupling capacitance is required for stable operation of the AT27BV040-12JU?
The AT27BV040-12JU requires a minimum 0.1 µF high-frequency 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 should also be added near the power entry point to suppress supply ripple during CE transitions.
Is the AT27BV040-12JU RoHS compliant and what package type does it use?
Yes, the AT27BV040-12JU is RoHS compliant (Pb/Halide-free) and shipped in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package (JEDEC MS-016, Variation AE). The "U" suffix in the ordering code explicitly denotes green packaging, and the device meets all requirements of Directive 2011/65/EU.
AT27BV040-12JU 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:
- 4Mbit
- Memory Organization:
- 512K 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT27BV040-12JU FAQ
1.How can I place an order for AT27BV040-12JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV040-12JU 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 AT27BV040-12JU reliable?
The price and inventory of AT27BV040-12JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV040-12JU is usually 5 days.
3.What payment methods are accepted for AT27BV040-12JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV040-12JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV040-12JU?
AT27BV040-12JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV040-12JU 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 AT27BV040-12JU?
For technical support, including AT27BV040-12JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV040-12JU requirements.
6.How does Aetrix verify that AT27BV040-12JU is sourced from the original manufacturer or authorized distributors?
All AT27BV040-12JU 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 AT27BV040-12JU meets industry standards.
7.What is the process for return or replacement of AT27BV040-12JU?
All AT27BV040-12JU units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV040-12JU, 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 AT27BV040-12JU part is unused and in its original packaging.
Return procedure for AT27BV040-12JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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