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Microchip Technology AT27LV020A-12JC
- Part No.:
- AT27LV020A-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV020A-12JC.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT27LV020A-12JC from Atmel is a 2-Mbit (256K × 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, dual-voltage operation, and JEDEC-standard PLCC-32 packaging. It delivers TTL/CMOS-compatible I/O, <1 µA typical standby current at 3.3 V, and supports rapid programming at 100 µs/byte.
For engineers reviewing the AT27LV020A-12JC datasheet, AT27LV020A-12JC pinout, AT27LV020A-12JC application, or AT27LV020A-12JC equivalent, key selection criteria include its 120 ns access timing grade, industrial temperature range (–40°C to +85°C), PLCC-32 mechanical compatibility, and OTP memory role in firmware storage for legacy embedded controllers and boot ROMs.
Technical Context
The AT27LV020A-12JC implements a standard OTP EPROM architecture with address decoding for 18-bit address space (A0–A17), eight bidirectional data outputs (O0–O7), and two-line control (CE/OE) enabling bus contention avoidance. Its Rapid™ programming algorithm uses 100 µs PGM pulses at VCC = 6.5 V and VPP = 13.0 V, with verification loops per byte.
It supports dual supply modes: low-voltage operation (3.0–3.6 V) with TTL-level outputs compatible with 5 V logic, and standard 5 V ±10% operation. Integrated product identification (Manufacturer ID = 0x1E, Device ID = 0x86) enables automated programming equipment recognition and ensures compatibility with AT27C020 tooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (256K × 8) - provides full 8-bit parallel boot code storage for microcontrollers without external address multiplexing. |
| Read Access Time | 120 ns max at VCC = 3.0–3.6 V or 4.5–5.5 V - meets timing budgets for 8 MHz Z80, 68K, or early ARM7-based systems. |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - enables drop-in replacement in mixed-voltage backplanes and hot-pluggable card designs. |
| Standby Current | 20 µA max (CMOS CE mode) at VCC = 3.6 V - extends battery life in portable instrumentation and handheld terminals. |
| Programming Speed | 100 µs/byte typical - reduces production programming cycle time by >5× vs. legacy 5 V EPROMs. |
| Operating Temperature | –40°C to +85°C - qualified for industrial control panels, automotive body modules, and telecom line cards. |
| Package | 32-lead PLCC (JEDEC MS-016 AE) - surface-mount compatible with standard reflow profiles and socketed prototyping. |
Pinout & Package
AT27LV020A-12JC is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC) per JEDEC MS-016 AE, with 0.050" pitch, 1.17" × 1.17" body size, and index corner marking Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit parallel address bus interface; A0–A17 fully decoded to select one of 256K bytes. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus; outputs driven only during Read or Program Verify when CE and OE are active low. |
| CE | Chip Enable | Active-low chip select; places device in Standby (High-Z outputs, <20 µA ICC) when high, enabling multi-chip memory decoding. |
| OE | Output Enable | Active-low output gate; controls data bus drive timing independently of CE to prevent bus contention during partial address transitions. |
| PGM | Program Strobe | Active-low pulse input for programming; initiates 100 µs write cycle when VPP = 13.0 V and VCC = 6.5 V. |
| VPP | Programming Voltage | 13.0 V ±0.25 V input required only during programming; must be applied simultaneously with or after VCC. |
| VCC | Power Supply | 3.0–3.6 V or 4.5–5.5 V main supply; powers logic and outputs; supplies 8 mA active current at 5 MHz. |
| GND | Ground | Reference return for all signals; requires local 0.1 µF ceramic decoupling per device per datasheet system guidelines. |
| NC | No Connect | Unbonded pin; must remain unconnected and unstubbed on PCB to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Read Operation | Operates natively at 3.3 V or 5 V without level shifters - simplifies design in hybrid voltage systems and legacy board upgrades. |
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop - eliminates manual reprogramming steps and improves manufacturing throughput. |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x86) readable via A9/VH and A0 toggle - ensures programming tools auto-select correct algorithms and voltages. |
| Two-Line Control Architecture | Independent CE and OE pins - allows precise control over output enable timing to meet setup/hold requirements of fast microprocessors. |
| JEDEC-Standard PLCC Packaging | 32J package compliant with MS-016 AE - guarantees socket compatibility, thermal performance, and long-term supply chain availability. |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS ROM |
|---|---|
|
Use Scenario: Fixed-function programmable logic controller storing ladder logic and I/O configuration in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile boot ROM providing deterministic startup sequence and field-upgradeable firmware image. Use Value: 120 ns access time ensures real-time response to sensor interrupts; industrial temp rating (-40°C to +85°C) sustains reliability in unconditioned control enclosures. |
Use Scenario: Motherboard BIOS storage in late-1990s desktop PCs requiring plug-and-play compatibility with ISA/PCI expansion slots. IC Role / Device Role / Timing Role: Primary boot ROM mapped to 0xE0000–0xFFFFF address space, accessed by x86 reset vector fetch. Use Value: Dual 3.3 V / 5 V support allows reuse across motherboard revisions; PLCC-32 footprint enables socketed field replacement without soldering. |
| Telecom Line Card Boot Memory | Embedded Instrumentation Calibration Data |
|
Use Scenario: Digital subscriber line (DSL) access multiplexer storing initialization firmware and line-provisioning tables. IC Role / Device Role / Timing Role: OTP memory holding immutable boot loader and hardware-specific calibration constants loaded at power-on. Use Value: <1 µA typical standby current minimizes quiescent draw in always-on telecom infrastructure; ESD-hardened (2000 V) design withstands board handling. |
Use Scenario: Portable oscilloscope or multimeter storing factory-trimmed ADC offset/gain coefficients and display gamma tables. IC Role / Device Role / Timing Role: Read-only calibration repository accessed once per power cycle during self-test and initialization. Use Value: Rapid programming enables efficient calibration data burn-in during final test; 256K × 8 capacity accommodates multi-channel correction matrices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C020-12JC | Requires 5 V ±10% only; no 3.3 V operation; identical pinout, timing, and programming interface. | Suitable only in fixed 5 V systems; cannot replace AT27LV020A-12JC in battery-powered or mixed-voltage designs. | Select when legacy 5 V supply is guaranteed and low-power standby is not required. |
| MX29LV020TC-12 | 3 V-only flash memory (not OTP); supports erase/rewrite; 120 ns access; TSOP-32 package only. | Enables field firmware updates but introduces complexity in write protection and endurance management. | Select when reprogrammability is needed; not suitable as direct OTP replacement due to different command set and erase requirements. |
Compared with AT27C020-12JC and MX29LV020TC-12, the AT27LV020A-12JC uniquely balances low-voltage operation, OTP security, and PLCC-32 compatibility-making it the only choice for industrial upgrades requiring battery-backed 3.3 V boot ROMs with zero rewrite risk.
Availability
AT27LV020A-12JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS ROM replacement, and telecom line card boot memory requiring stable component supply across extended product lifecycles.
Supply support for AT27LV020A-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 innovator known for high-reliability nonvolatile memory and microcontroller solutions targeting industrial, automotive, and communications markets.
The AT27LV020A product line was designed specifically for low-voltage, high-reliability OTP EPROM applications in portable and mixed-supply embedded systems-prioritizing power efficiency, JEDEC compatibility, and programming simplicity.
FAQ
What is the maximum operating temperature range for the AT27LV020A-12JC?
The AT27LV020A-12JC is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table on page 10 of the datasheet and applies to all -JI, -TI, and -VI suffix variants. The AT27LV020A-12JC meets this range in its PLCC-32 package and is validated for use in uncontrolled ambient environments such as factory floors and outdoor telecom cabinets.
Does the AT27LV020A-12JC support 3.3 V operation with TTL-compatible outputs?
Yes, the AT27LV020A-12JC supports full 3.0–3.6 V operation and produces TTL-compatible outputs (VOH ≥ 2.4 V, VOL ≤ 0.4 V) at VCC = 3.3 V, as specified in the DC Operating Characteristics table on page 4. This allows direct interfacing with standard 5 V TTL logic without level shifters, a key feature distinguishing it from pure 5 V EPROMs like the AT27C020.
What programming voltage is required for the AT27LV020A-12JC?
The AT27LV020A-12JC requires VPP = 13.0 V ± 0.25 V during programming, applied simultaneously with or after VCC = 6.5 V ± 0.25 V. This is explicitly defined in the DC Programming Characteristics table on page 7. VPP must be isolated from VCC except during programming, and a 0.1 µF capacitor is mandatory between VPP and GND per the Programming Waveforms section.
Is the AT27LV020A-12JC pin-compatible with the AT27C020 series?
Yes, the AT27LV020A-12JC is pin-compatible and functionally compatible with the AT27C020 family, including identical pin assignments, address/data mapping, and two-line control (CE/OE). The datasheet states "Compatible with JEDEC Standard AT27C020" and confirms identical programming procedures and equipment usage, though AT27C020 lacks 3.3 V operation.
What is the standby current specification for the AT27LV020A-12JC at 3.3 V?
The AT27LV020A-12JC has a maximum standby current (ISB1, CMOS CE mode) of 20 µA at VCC = 3.6 V, with typical consumption less than 1 µA at 3.3 V, as stated in the Features section and verified in the DC Operating Characteristics table on page 4. This ultra-low standby draw is critical for battery-operated devices where the EPROM remains powered but inactive for extended periods.
AT27LV020A-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:
- 2Mbit
- Memory Organization:
- 256K 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)
AT27LV020A-12JC FAQ
1.How can I place an order for AT27LV020A-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV020A-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 AT27LV020A-12JC reliable?
The price and inventory of AT27LV020A-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV020A-12JC is usually 5 days.
3.What payment methods are accepted for AT27LV020A-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV020A-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV020A-12JC?
AT27LV020A-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV020A-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 AT27LV020A-12JC?
For technical support, including AT27LV020A-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV020A-12JC requirements.
6.How does Aetrix verify that AT27LV020A-12JC is sourced from the original manufacturer or authorized distributors?
All AT27LV020A-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 AT27LV020A-12JC meets industry standards.
7.What is the process for return or replacement of AT27LV020A-12JC?
All AT27LV020A-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV020A-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 AT27LV020A-12JC part is unused and in its original packaging.
Return procedure for AT27LV020A-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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