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Microchip Technology AT27LV040A-90JU
- Part No.:
- AT27LV040A-90JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV040A-90JU.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT27LV040A-90JU from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM with 90 ns read access time, dual-voltage operation (3.0–3.6 V or 4.5–5.5 V), and industrial temperature range (−40°C to +85°C). It features JEDEC-standard 32-lead PLCC packaging, TTL/CMOS-compatible I/O, and integrated product identification code for automated programming.
For engineers reviewing the AT27LV040A-90JU datasheet, AT27LV040A-90JU pinout, AT27LV040A-90JU application, or AT27LV040A-90JU equivalent, this device serves as a low-power, battery-friendly OTP ROM replacement for legacy 5V EPROM systems requiring backward compatibility with AT27C040 programming infrastructure and logic-level interoperability across mixed-supply environments.
Technical Context
The AT27LV040A-90JU implements a standard parallel-addressed OTP EPROM architecture with two-line control (CE and OE), supporting fast random-access reads and rapid byte-wise programming at 100 µs/byte. Its dual-voltage design enables direct interface with both 3.3V and 5V logic families without level-shifting.
It uses high-reliability CMOS process technology with 2,000V HBM ESD protection and 200mA latchup immunity. The integrated product ID code (0x1E for manufacturer, 0x0B for device type) allows automatic recognition by industry-standard programmers, ensuring identical programming flow to the AT27C040 despite voltage differences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 4,194,304-bit (512K × 8) OTP EPROM - fixed storage capacity for firmware/boot code in embedded systems |
| Read access time | 90 ns max at VCC = 3.0–3.6 V - supports 11 MHz system bus timing without wait states |
| Supply voltage range | 3.0–3.6 V or 4.5–5.5 V - enables drop-in use in both 3.3V portable and 5V legacy host systems |
| Standby current | 20 µA max (CMOS mode), <1 µA typical at 3.3 V - extends battery life in always-on standby applications |
| Active power dissipation | 36 mW max at 5 MHz and VCC = 3.6 V - less than half the power of comparable 5V EPROMs |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade environmental robustness |
| Package | 32-lead PLCC (JEDEC MS-016, variation AE) - surface-mount compatible with standard reflow profiles |
Pinout & Package
AT27LV040A-90JU is housed in a 32-lead plastic J-leaded chip carrier (PLCC), compliant with JEDEC MS-016 variation AE. Dimensions: 12.45 mm × 14.98 mm × 3.35 mm (D × E × A), with 1.27 mm lead pitch and matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address inputs | 19-bit address bus accepting 512K locations; TTL/CMOS-compatible thresholds support mixed-voltage system interfacing |
| O0–O7 | Data outputs | 8-bit bidirectional data bus with VOH ≥ 2.4 V at IOH = −2.0 mA (3.6 V) and −400 µA (5 V), enabling direct connection to TTL or LVTTL loads |
| CE | Chip enable | Active-low global enable controlling device selection and power state transition between active and standby modes |
| OE | Output enable | Active-low output gate enabling high-impedance tri-state behavior to prevent bus contention during shared-bus operation |
| VCC | Power supply | Primary supply input supporting dual ranges: 3.0–3.6 V (low-power mode) or 4.5–5.5 V (legacy compatibility) |
| VPP | Programming voltage | 13.0 V ± 0.25 V input required only during programming; must be applied simultaneously with VCC and decoupled with 0.1 µF capacitor |
| GND | Ground reference | Common return path for all signals and supplies; requires local 0.1 µF ceramic decoupling per device |
Key Features
| Feature | Design Value |
|---|---|
| Rapid programming algorithm | 100 µs/byte typical programming time with up to 10 pulse retries per byte - reduces production programming cycle time vs. conventional EPROMs |
| Integrated product ID code | Manufacturer ID = 0x1E, Device ID = 0x0B - enables automatic algorithm selection and voltage configuration in standard programming equipment |
| Two-line control architecture | Dedicated CE and OE pins - provides precise bus arbitration control and eliminates need for external gating logic in multi-device systems |
| Green packaging option | Pb/halide-free matte tin finish on 32J PLCC - meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 requirements |
| High-reliability process | 2,000V HBM ESD rating and 200mA latchup immunity - ensures robustness in manufacturing handling and field operation |
Applications
| Industrial Control Firmware Storage | Legacy System Boot ROM Replacement |
|---|---|
Use Scenario: Storing boot loader and configuration parameters in programmable logic controllers (PLCs) operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with guaranteed retention over 10 years and immunity to voltage transients during power cycling. Use Value: Eliminates need for external level shifters when interfacing with 5V microcontrollers while maintaining <1 µA standby draw for energy-efficient sleep modes. | Use Scenario: Upgrading aging test equipment using AT27C040-based designs to lower power without redesigning PCB layout or programming infrastructure. IC Role / Device Role / Timing Role: Pin- and function-compatible OTP ROM replacement supporting identical programming hardware and JEDEC-standard PLCC footprint. Use Value: Achieves 50% reduction in active power consumption at 3.3V while retaining full 5V read compatibility for mixed-voltage backplane integration. |
| Portable Medical Device Boot Code | Automated Test Equipment (ATE) Calibration Data |
Use Scenario: Holding immutable calibration constants and safety-critical startup routines in handheld diagnostic instruments powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-voltage OTP memory enabling direct connection to 3.3V microcontroller buses without regulators or translators. Use Value: 90 ns access time supports real-time boot execution; <1 µA typical standby current extends battery runtime between charges. | Use Scenario: Storing precision calibration coefficients and self-test vectors in benchtop ATE platforms where long-term data integrity is mandatory. IC Role / Device Role / Timing Role: High-reliability, nonvolatile storage with 2,000V ESD protection to withstand repeated handling and probe contact events. Use Value: Integrated product ID ensures correct algorithm selection during field recalibration, preventing misprogramming due to human error or tool misconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-90JU | 5V-only operation (4.5–5.5 V); no 3.3V support; identical 90 ns access, same PLCC package and pinout | Requires dedicated 5V rail; unsuitable for battery-powered or mixed-voltage systems | Select when legacy 5V-only infrastructure exists and power efficiency is secondary to cost or availability |
| AM27C040-90DC | AMD-manufactured 4Mb OTP EPROM; 90 ns access; 5V operation; 32-pin ceramic DIP (not PLCC) | Different package (DIP vs PLCC) requires PCB redesign; lacks integrated ID code and rapid programming algorithm | Select only if through-hole assembly is mandated and programming equipment supports non-Atmel ID protocols |
Compared with AT27C040-90JU, the AT27LV040A-90JU adds dual-voltage flexibility and halved power consumption but retains identical programming flow and pinout; versus AM27C040-90DC, it offers superior manufacturability via PLCC packaging and automated ID-based programming, though at higher unit cost.
Availability
AT27LV040A-90JU is available at Aetrix Electronics and suitable for industrial control firmware storage, legacy system boot ROM replacement, and portable medical device boot code applications requiring stable component supply and long-term lifecycle support.
Supply support for AT27LV040A-90JU 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 AT27LV040A belongs to Atmel's legacy OTP EPROM product line, designed specifically to bridge 5V-to-3.3V system transitions while preserving investment in existing programming tools, firmware architectures, and PCB layouts.
FAQ
What voltage ranges does the AT27LV040A-90JU support during normal read operation?
The AT27LV040A-90JU supports two distinct supply voltage ranges for read operation: 3.0 V to 3.6 V (low-voltage mode) and 4.5 V to 5.5 V (standard 5V mode). Both ranges are fully specified in the datasheet with corresponding timing and current parameters. The AT27LV040A-90JU maintains 90 ns access time across both ranges and delivers TTL-compatible outputs even when powered at 3.3 V, enabling seamless integration into mixed-supply systems without external level translation.
Is the AT27LV040A-90JU pin-compatible with the AT27C040 series?
Yes, the AT27LV040A-90JU is pin-compatible and functionally equivalent to the AT27C040-90JU in read mode and programming mode. Both share identical 32-lead PLCC pinout, address/data/control signal assignments, and JEDEC-standard timing. The AT27LV040A-90JU retains the same integrated product ID code (0x1E/0x0B) and rapid programming algorithm, allowing use of identical programming hardware and firmware tools without modification.
What is the purpose of the VPP pin on the AT27LV040A-90JU, and when is it used?
The VPP pin on the AT27LV040A-90JU is the programming voltage input, requiring 13.0 V ± 0.25 V only during programming operations. It is not used during normal read or standby modes. The AT27LV040A-90JU mandates simultaneous application and removal of VPP and VCC, and requires a 0.1 µF capacitor between VPP and GND to suppress transients. During read operation, VPP may be tied to VCC, but must be isolated during programming to avoid damage or incorrect writes.
Does the AT27LV040A-90JU support industrial temperature operation?
Yes, the AT27LV040A-90JU is rated for industrial temperature operation from −40°C to +85°C. This specification applies to all electrical characteristics including access time, standby current, and output drive strength. The device uses high-reliability CMOS process technology with 2,000V HBM ESD protection and 200mA latchup immunity, ensuring stable performance across the full industrial range without derating or thermal management overhead.
How does the AT27LV040A-90JU achieve low power consumption compared to standard 5V EPROMs?
The AT27LV040A-90JU achieves low power consumption through optimized 3.3V CMOS process design: standby current is typically <1 µA and max 20 µA at 3.6 V, while active power is limited to 36 mW at 5 MHz and 3.6 V - less than half that of comparable 5V EPROMs. This reduction stems from lower dynamic switching power (P ∝ CV²f) and reduced leakage currents inherent to the scaled process, enabling extended battery life in portable applications without sacrificing speed or compatibility.
AT27LV040A-90JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 90 ns
- Voltage - Supply:
- 3V ~ 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)
AT27LV040A-90JU FAQ
1.How can I place an order for AT27LV040A-90JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-90JU 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-90JU reliable?
The price and inventory of AT27LV040A-90JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-90JU is usually 5 days.
3.What payment methods are accepted for AT27LV040A-90JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-90JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-90JU?
AT27LV040A-90JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-90JU 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-90JU?
For technical support, including AT27LV040A-90JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-90JU requirements.
6.How does Aetrix verify that AT27LV040A-90JU is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-90JU 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-90JU meets industry standards.
7.What is the process for return or replacement of AT27LV040A-90JU?
All AT27LV040A-90JU units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-90JU, 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-90JU part is unused and in its original packaging.
Return procedure for AT27LV040A-90JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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