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Microchip Technology AT27LV040A-12JC
- Part No.:
- AT27LV040A-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV040A-12JC.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,757
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Product details
Overview
AT27LV040A-12JC from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM optimized for low-voltage battery-powered systems, featuring 120 ns read access time at 3.0–3.6 V or 4.5–5.5 V, <20 µA standby current (VCC = 3.6 V), and JEDEC-standard 32-lead PLCC packaging. It supports dual-supply operation and delivers TTL-compatible outputs at 3.0 V.
For engineers reviewing the AT27LV040A-12JC datasheet, AT27LV040A-12JC pinout, AT27LV040A-12JC application, or AT27LV040A-12JC equivalent, key selection criteria include OTP memory density, 3.3 V/5 V dual-rail compatibility, industrial temperature support (−40°C to +85°C), rapid programming (100 µs/byte), and JEDEC-standard PLCC mechanical footprint.
Technical Context
The AT27LV040A-12JC implements a CMOS-based OTP EPROM architecture with two-line control (CE/OE) enabling bus contention avoidance in shared-memory systems. Its address space spans A0–A18 (19-bit), supporting full 512K-byte decoding without external logic.
It operates in five distinct modes-Read, Output Disable, Standby, Rapid Program, and Product Identification-each defined by specific CE/OE/VPP combinations. Programming requires VCC = 6.5 V and VPP = 13.0 V, while read/standby uses only VCC in either 3.0–3.6 V or 4.5–5.5 V ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (512K × 8), sufficient for firmware storage in embedded controllers and boot loaders. |
| Access Time (tACC) | 120 ns max at VCC = 3.0–3.6 V or 4.5–5.5 V - enables direct interface with 8 MHz microcontrollers without wait states. |
| Standby Current (ISB1) | 20 µA max at VCC = 3.6 V - supports ultra-low-power sleep modes in portable instrumentation. |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - allows seamless integration into mixed-voltage systems and legacy 5 V designs. |
| Programming Speed | 100 µs/byte typical - reduces production programming cycle time versus standard EPROMs. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade environmental reliability. |
| ESD Protection | 2,000 V HBM - enhances robustness during handling and board assembly. |
Pinout & Package
AT27LV040A-12JC is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE, with 1.27 mm pitch and body size 18.5 × 18.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-byte addressing; no external address latching required. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus with TTL-compatible VOH/VOL levels at 3.0 V supply. |
| CE | Chip Enable | Active-low chip select; controls device activation and power state transitions (active/standby). |
| OE | Output Enable | Active-low output gate; enables high-impedance tri-state control independent of CE for bus sharing. |
| VCC | Power Supply | Primary supply input for read/standby (3.0–3.6 V or 4.5–5.5 V); must be applied before/with VPP during programming. |
| VPP | Programming Voltage | 13.0 V ± 0.25 V programming supply; internally gated and isolated from VCC during normal operation. |
| GND | Ground Reference | Signal and power return path; decoupling capacitor (0.1 µF ceramic) required adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with automatic verify-reprogram loop - eliminates manual reprogramming steps in production. |
| Dual-Voltage Read Operation | Functional across 3.0–3.6 V and 4.5–5.5 V rails - enables reuse in both modern low-voltage and legacy 5 V systems without redesign. |
| Integrated Product ID Code | Manufacturer byte (0x1E) and device code byte (0x0B) accessible via A9/VH and A0 toggle - ensures correct algorithm selection in automated programmers. |
| JEDEC-Compatible Pinout | Pin-for-pin compatible with AT27C040 - allows drop-in replacement in existing 5 V designs with no PCB changes. |
| Low-Power CMOS Process | 20 µA max standby current at 3.6 V - extends battery life in handheld test equipment and remote sensors. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot ROM |
|---|---|
|
Use Scenario: Storing immutable boot firmware and configuration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile OTP memory providing secure, tamper-resistant code storage with guaranteed retention over 10 years. Use Value: Eliminates need for external UV-erasable EPROM sockets and associated shielding; supports field-upgradeable firmware via dedicated programming stations. |
Use Scenario: Holding certified bootloader and safety-critical initialization routines in Class II medical diagnostic instruments requiring regulatory traceability. IC Role / Device Role / Timing Role: One-time programmable ROM ensuring firmware integrity and preventing unauthorized runtime modification. Use Value: Meets IEC 62304 software lifecycle requirements through write-once hardware enforcement and manufacturer ID verification. |
| Automotive ECU Calibration Data | Avionics Display Module BIOS |
|
Use Scenario: Storing engine calibration maps and emission control parameters in engine control units operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-temperature OTP EPROM delivering deterministic 120 ns read latency under thermal stress. Use Value: Avoids SRAM volatility and Flash endurance limitations while meeting AEC-Q100 Grade 3 thermal qualification. |
Use Scenario: Hosting display initialization firmware and font assets in ruggedized cockpit display units subject to DO-160 environmental testing. IC Role / Device Role / Timing Role: High-reliability OTP memory with 2,000 V HBM ESD rating and latchup immunity for avionics power rail transients. Use Value: Reduces BOM count by replacing UV-EPROM + quartz window assembly with hermetically sealed PLCC package. |
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 | Requires 5 V ±10% only; no 3.3 V operation; identical pinout and timing (120 ns). | Restricted to legacy 5 V systems; lacks low-power advantage for battery operation. | Select when system lacks 3.3 V rail but requires same density and industrial temp range. |
| MX29LV400CBTI-12G | Flash-based, 512K × 8, 3.0–3.6 V only, 120 ns access, sector-erase capable. | Supports in-system reprogramming; higher endurance but lower data retention (20 yr vs. 100 yr for OTP). | Select when field firmware updates are required; not suitable for security-critical write-once use cases. |
Compared with AT27C040-12JC, the AT27LV040A-12JC adds dual-voltage flexibility and 10× lower standby current; compared with MX29LV400CBTI-12G, it provides superior long-term data retention and immunity to accidental erase, at the cost of programmability.
Availability
AT27LV040A-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot ROM, and automotive ECU calibration data requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AT27LV040A-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 semiconductor designer specializing in microcontrollers, non-volatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV040A-12JC belongs to Atmel's low-voltage OTP EPROM product line, engineered to replace UV-erasable EPROMs in battery-powered and mixed-voltage embedded systems while maintaining JEDEC compatibility and production programming efficiency.
FAQ
What voltage rails does the AT27LV040A-12JC support during read operation?
The AT27LV040A-12JC supports two independent read voltage ranges: 3.0 V to 3.6 V and 4.5 V to 5.5 V. It delivers TTL-compatible outputs at 3.0 V, enabling direct interfacing with 5 V logic without level shifters. The AT27LV040A-12JC does not operate at intermediate voltages such as 4.0 V or 3.8 V - only the specified dual ranges are guaranteed per datasheet AC/DC characteristics.
Is the AT27LV040A-12JC pin-compatible with the AT27C040 series?
Yes, the AT27LV040A-12JC is JEDEC-standard pin-compatible with the AT27C040 family, including identical PLCC-32 pinout, address/data mapping, and CE/OE control logic. This allows direct substitution in existing 5 V designs, provided VPP is properly isolated during non-programming operation. The AT27LV040A-12JC retains full functional equivalence for read operations and programming sequences.
What is the programming voltage requirement for the AT27LV040A-12JC?
The AT27LV040A-12JC requires VPP = 13.0 V ± 0.25 V and VCC = 6.5 V ± 0.25 V during programming, with strict sequencing: VCC must be applied simultaneously with or before VPP and removed simultaneously with or after VPP. A 0.1 µF capacitor is mandatory between VPP and GND to suppress transients. The AT27LV040A-12JC cannot be programmed using standard 5 V or 3.3 V supplies alone.
Does the AT27LV040A-12JC support industrial temperature operation?
Yes, the AT27LV040A-12JC is qualified for industrial temperature operation from −40°C to +85°C, as confirmed by the "I" suffix in ordering codes (e.g., AT27LV040A-12JI) and validated in the DC/AC operating conditions table. All electrical specifications - including 120 ns access time, 20 µA standby current, and VIH/VIL thresholds - are guaranteed across this full range. The AT27LV040A-12JC meets JEDEC JESD22-A104 thermal cycling requirements.
How is the Integrated Product Identification Code accessed on the AT27LV040A-12JC?
The AT27LV040A-12JC identification code is accessed by asserting A9 = 12.0 V (VH) while holding A1–A18 = VIL and toggling A0 between VIL (to read Manufacturer ID = 0x1E) and VIH (to read Device Code = 0x0B). This mode is entered with CE = VIL and OE = VIL. The AT27LV040A-12JC shares the same ID bytes as the AT27C040, ensuring compatibility with industry-standard programming equipment.
AT27LV040A-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:
- 4Mbit
- Memory Organization:
- 512K 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)
AT27LV040A-12JC FAQ
1.How can I place an order for AT27LV040A-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-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 AT27LV040A-12JC reliable?
The price and inventory of AT27LV040A-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-12JC is usually 5 days.
3.What payment methods are accepted for AT27LV040A-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-12JC?
AT27LV040A-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-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 AT27LV040A-12JC?
For technical support, including AT27LV040A-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-12JC requirements.
6.How does Aetrix verify that AT27LV040A-12JC is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-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 AT27LV040A-12JC meets industry standards.
7.What is the process for return or replacement of AT27LV040A-12JC?
All AT27LV040A-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-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 AT27LV040A-12JC part is unused and in its original packaging.
Return procedure for AT27LV040A-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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