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Microchip Technology AT27LV020A-12JU
- Part No.:
- AT27LV020A-12JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV020A-12JU.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,443
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Product details
Overview
AT27LV020A-12JU from Atmel is a 2-Mbit (256K × 8) one-time programmable EPROM with 120 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 two-line control (CE/OE), TTL/CMOS-compatible I/O, and JEDEC-standard 32-lead PLCC packaging - optimized for battery-powered portable systems requiring low-power nonvolatile storage.
For engineers reviewing the AT27LV020A-12JU datasheet, AT27LV020A-12JU pinout, AT27LV020A-12JU application, or AT27LV020A-12JU equivalent, key selection criteria include verified 3.3V/5V dual-supply compatibility, rapid 100 µs/byte programming, sub-1 µA typical standby current at 3.3 V, and JEDEC-standard PLCC footprint with integrated product identification code.
Technical Context
The AT27LV020A-12JU implements a parallel-addressed OTP EPROM architecture with 18 address lines (A0–A17), 8 bidirectional data outputs (O0–O7), and dedicated PGM and VPP pins for high-voltage programming. Its two-line enable logic (CE/OE) enables clean bus isolation without external gating.
It supports rapid programming via 100 µs ±5% PGM pulses at VCC = 6.5 V and VPP = 13.0 V, with built-in verification/reprogramming loops per byte. Product identification is accessed by toggling A0 while holding A9 at 12.0 V, returning manufacturer (0x1E) and device (0x86) codes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2,097,152 bits (256K × 8) - provides sufficient nonvolatile storage for firmware boot code or configuration data in embedded controllers. |
| Read access time | 120 ns max at VCC = 3.0–3.6 V - enables direct interface with 8 MHz microcontrollers without wait states. |
| Supply voltage range | 3.0–3.6 V or 4.5–5.5 V - supports dual-voltage system designs and backward compatibility with legacy 5 V hosts. |
| Standby current | 20 µA max (1 µA typical) at VCC = 3.6 V - extends battery life in portable instrumentation and handheld devices. |
| Active power dissipation | 29 mW max at 5 MHz and VCC = 3.6 V - reduces thermal load and simplifies thermal management in dense PCB layouts. |
| Programming speed | 100 µs/byte typical - cuts production programming time by >5× versus conventional EPROMs, improving manufacturing throughput. |
| Operating temperature | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor communications equipment. |
Pinout & Package
AT27LV020A-12JU is housed in a JEDEC-standard 32-lead plastic J-leaded chip carrier (PLCC), package code 32J, with lead finish matte tin and Pb/halide-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address inputs | 18-bit address bus accepting full 256K memory space; CMOS/TTL-compatible thresholds ensure robust timing margin across supply ranges. |
| O0–O7 | Data outputs | 8-bit bidirectional data bus with VOH ≥ 2.4 V at IOH = −2.0 mA (3.3 V) and −400 µA (5 V), ensuring reliable level translation. |
| CE | Chip enable | Active-low global enable controlling device activation; high-impedance output when asserted high, preventing bus contention. |
| OE | Output enable | Active-low output gate; allows data hold during address transitions and supports multiplexed bus sharing with other peripherals. |
| PGM | Program strobe | Active-low pulse input triggering 100 µs programming cycles; requires precise timing alignment with VPP/VCC ramp-up. |
| VPP | Programming voltage | 13.0 V ± 0.25 V high-voltage supply pin; must be applied simultaneously with or after VCC and removed simultaneously or before. |
| NC | No connect | Pins 14, 15, 16, 17, 18, 19, 20 - electrically isolated; no internal connection; must remain unconnected on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid programming algorithm | 100 µs/byte typical programming time with automatic verify-and-reprogram loop - eliminates manual reprogramming passes and improves yield in high-volume programming. |
| Dual-voltage read operation | Valid operation at 3.0–3.6 V or 4.5–5.5 V - enables single BOM for both 3.3 V and 5 V system variants, reducing inventory complexity. |
| Integrated product ID code | Manufacturer ID (0x1E) and device ID (0x86) accessible via A9/VH and A0 toggle - enables automated programmer validation and prevents incorrect device loading. |
| Low-power CMOS design | Typical standby current <1 µA at 3.3 V - meets stringent energy budgets in always-on sensor nodes and battery-backed real-time clocks. |
| JEDEC-standard PLCC package | 32J footprint compliant with MS-016 variation AE - ensures mechanical and solder-reflow compatibility with existing PLCC sockets and rework tooling. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot ROM |
|---|---|
Use Scenario: Storing immutable boot firmware and safety-critical calibration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile parallel ROM providing deterministic 120 ns read latency to microcontroller instruction fetch bus during cold start and watchdog recovery. Use Value: Dual-voltage support allows same firmware image to run across 3.3 V and 5 V controller platforms; industrial temp rating ensures reliability at 85°C ambient cabinet temperatures. |
Use Scenario: Holding certified bootloader and diagnostic self-test routines in Class II medical instruments requiring traceable, tamper-resistant firmware storage. IC Role / Device Role / Timing Role: One-time programmable EPROM acting as root-of-trust memory - immune to accidental overwrite or malware injection during field operation. Use Value: Sub-1 µA standby current preserves battery charge during long-term storage; ESD-hardened (2,000 V) and latchup-immune (200 mA) design meets IEC 60601-1 EMC requirements. |
| Automotive Body Control Module | Test Equipment Configuration Memory |
Use Scenario: Storing vehicle-specific configuration maps (e.g., door lock logic, lighting profiles) in BCMs where firmware updates are infrequent but environmental ruggedness is essential. IC Role / Device Role / Timing Role: Parallel-accessed OTP memory interfaced directly to 8-bit MCU data bus; CE/OE timing accommodates variable clock domains in mixed-signal subsystems. Use Value: −40°C to +85°C operation covers full automotive under-hood thermal range; green (Pb/halide-free) packaging complies with ELV Directive and RoHS. |
Use Scenario: Retaining calibrated instrument settings, test sequence definitions, and user preferences in benchtop oscilloscopes and signal generators with no volatile backup required. IC Role / Device Role / Timing Role: Static configuration ROM mapped into microcontroller's memory space; accessed only at power-on or menu navigation - minimal active duty cycle. Use Value: 120 ns access time enables zero-wait-state reads from flash-like memory; rapid 100 µs/byte programming accelerates factory calibration and firmware burn-in. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C020-12JU | Requires 5 V ±10% only; no 3.3 V operation; identical pinout, timing, and programming algorithm. | Suitable only in fixed 5 V systems; cannot replace AT27LV020A-12JU in dual-supply or battery-powered designs. | Select when cost sensitivity outweighs voltage flexibility and industrial temperature is not required. |
| MX29LV200CBTI-90G | Flash-based (not OTP), 3.0–3.6 V only, 90 ns access, 48-pin TSOP; lacks VPP pin and rapid programming mode. | Enables field firmware updates; incompatible pinout and command set; requires different PCB layout and driver software. | Select only if reprogrammability is mandatory and board redesign is acceptable. |
Compared with AT27C020-12JU and MX29LV200CBTI-90G, the AT27LV020A-12JU uniquely delivers 3.3 V/5 V dual-supply operation in a drop-in PLCC package while retaining OTP security and rapid programming - making it optimal for legacy-compatible upgrades and mixed-voltage industrial platforms.
Availability
AT27LV020A-12JU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot ROM, and automotive body control module applications requiring stable component supply and long-lifecycle support.
Supply support for AT27LV020A-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 U.S.-based semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV020A-12JU belongs to Atmel's low-voltage OTP EPROM product line, designed specifically for portable, battery-operated, and dual-voltage embedded systems needing secure, unalterable firmware storage with minimal power overhead.
FAQ
What is the maximum operating voltage for VPP on the AT27LV020A-12JU?
The AT27LV020A-12JU requires VPP = 13.0 V ± 0.25 V during programming, with absolute maximum rating of +14.0 V on A9 and VPP pins. Exceeding 13.25 V risks over-stress and reduced programming endurance. The AT27LV020A-12JU must have VCC applied simultaneously with or before VPP, and both supplies must be removed together to prevent latchup.
Can the AT27LV020A-12JU operate reliably at 3.3 V with TTL-level outputs?
Yes - the AT27LV020A-12JU produces TTL-compatible outputs (VOH ≥ 2.4 V, VOL ≤ 0.4 V) at VCC = 3.0–3.6 V, meeting LVTTL logic thresholds. This allows direct interfacing with standard 5 V TTL devices without level shifters. The AT27LV020A-12JU achieves this through optimized output driver design, confirmed in Table 5-3 DC characteristics.
Is the AT27LV020A-12JU pin-compatible with the AT27C020-12JU?
Yes - the AT27LV020A-12JU shares identical 32-lead PLCC pinout, address/data mapping, and two-line control (CE/OE) interface with the AT27C020-12JU. Both support the same rapid programming algorithm and product ID code. However, the AT27LV020A-12JU adds 3.3 V operation and lower standby current, while maintaining full functional and mechanical interchangeability.
What decoupling capacitance is required for stable operation of the AT27LV020A-12JU?
Per Atmel's system considerations, each AT27LV020A-12JU requires a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close to the device as possible. For arrays of multiple AT27LV020A-12JU devices, a 4.7 µF bulk electrolytic capacitor must also be added near the power entry point to suppress supply rail droop during simultaneous output transitions.
Does the AT27LV020A-12JU support in-system programming?
No - the AT27LV020A-12JU is a one-time programmable EPROM requiring external high-voltage (13.0 V) programming equipment. It does not support in-system or in-circuit programming. Programming must occur off-board using a dedicated EPROM programmer that applies VPP and sequences PGM pulses per the rapid algorithm. Once programmed, the AT27LV020A-12JU is read-only and immune to accidental writes.
AT27LV020A-12JU 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:
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT27LV020A-12JU FAQ
1.How can I place an order for AT27LV020A-12JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV020A-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 AT27LV020A-12JU reliable?
The price and inventory of AT27LV020A-12JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV020A-12JU is usually 5 days.
3.What payment methods are accepted for AT27LV020A-12JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV020A-12JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV020A-12JU?
AT27LV020A-12JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV020A-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 AT27LV020A-12JU?
For technical support, including AT27LV020A-12JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV020A-12JU requirements.
6.How does Aetrix verify that AT27LV020A-12JU is sourced from the original manufacturer or authorized distributors?
All AT27LV020A-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 AT27LV020A-12JU meets industry standards.
7.What is the process for return or replacement of AT27LV020A-12JU?
All AT27LV020A-12JU units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV020A-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 AT27LV020A-12JU part is unused and in its original packaging.
Return procedure for AT27LV020A-12JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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