My Inquiry
My Account
Microchip Technology AT27LV020A-12JI
- Part No.:
- AT27LV020A-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV020A-12JI.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,157
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT27LV020A-12JI 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-supply compatibility, and industrial temperature range (−40°C to +85°C). It supports JEDEC-standard PLCC-32 packaging and uses two-line control (CE/OE) for bus contention avoidance in embedded memory subsystems.
For engineers reviewing the AT27LV020A-12JI datasheet, AT27LV020A-12JI pinout, AT27LV020A-12JI application, or AT27LV020A-12JI equivalent, key selection considerations include its 120 ns access timing, 20 µA max standby current at 3.6 V, Rapid™ programming (100 µs/byte), OTP reliability, and compatibility with AT27C020-based designs requiring voltage flexibility.
Technical Context
The AT27LV020A-12JI implements a CMOS OTP EPROM architecture with address decoding for 18-bit addressing (A0–A17), 8-bit parallel data output (O0–O7), and dedicated PGM/VPP pins for high-voltage programming. Its dual-voltage operation enables seamless integration into mixed-supply systems without level-shifting.
It features TTL- and CMOS-compatible I/O (VIL ≤ 0.8 V, VIH ≥ 2.0 V), integrated product identification code (Manufacturer ID = 0x1E, Device ID = 0x86), and robust ESD protection (2,000 V) and latchup immunity (200 mA), supporting reliable operation in industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (256K × 8) - supports firmware storage for microcontroller boot code or configuration data in space-constrained designs. |
| Read Access Time | 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. |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - allows single-part deployment across 3.3 V and 5 V host systems, eliminating dual-BOM complexity. |
| Standby Current | 20 µA max at VCC = 3.6 V - extends battery life in portable instrumentation and handheld devices during idle periods. |
| Programming Speed | 100 µs/byte typical (Rapid™ Algorithm) - reduces production programming time versus legacy EPROMs, improving throughput in manufacturing. |
| Operating Temperature | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor communications equipment. |
| Package Type | 32-lead PLCC (JEDEC MS-016 AE) - surface-mount compatible with standard reflow profiles and repair-friendly socketing. |
Pinout & Package
AT27LV020A-12JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE, with pin 1 marked by index notch and corner chamfer. The package is lead-free compliant and RoHS-qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus accepting full 256K memory map; driven by microcontroller or FPGA address lines. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus (output-only in read mode); TTL/CMOS-compatible drive strength supports direct connection to MCU data bus. |
| CE | Chip Enable | Active-low chip select; controls device activation and entry to standby mode when high (reducing ICC to ≤20 µA). |
| OE | Output Enable | Active-low output gate; enables data bus drivers only when CE and OE are both low, preventing bus contention. |
| PGM | Program Strobe | Active-low pulse input during programming; initiates byte programming cycle when VPP = 13.0 V and VCC = 6.5 V. |
| VPP | Programming Voltage | 13.0 V ± 0.25 V supply 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; also used as VPP source in non-programming modes. |
| GND | Ground Reference | Common return path for VCC, VPP, and I/O; requires local 0.1 µF ceramic decoupling per device per datasheet guidelines. |
| NC | No Connect | Unbonded pin; must remain unconnected on PCB to avoid parasitic coupling or unintended biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Read Operation | Operates natively at 3.3 V or 5 V without external regulators - simplifies power architecture in hybrid-voltage systems like PC cards or field-upgradable modules. |
| Rapid™ Programming Algorithm | 100 µs/byte typical write time with auto-verify loop - eliminates need for external programming timers and reduces test floor dwell time. |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x86) accessible via A0/A9 toggling - enables automatic algorithm selection in universal programmers, ensuring correct VPP timing and verification. |
| Two-Line Control Interface | CE and OE inputs decouple chip selection from output gating - permits shared data bus among multiple memory devices without additional bus transceivers. |
| High-Reliability Process | 2,000 V HBM ESD rating and 200 mA latchup immunity - meets industrial IEC 61000-4-2 requirements without external protection components. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot ROM |
|---|---|
|
Use Scenario: Storing immutable boot firmware and calibration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing deterministic 120 ns read latency to ensure real-time instruction fetch during motion control loops. Use Value: Industrial temperature rating (−40°C to +85°C) and 20 µA standby current enable continuous operation in unconditioned control cabinets with minimal thermal management. |
Use Scenario: Holding certified bootloader and safety-critical initialization routines in portable diagnostic equipment such as ultrasound or ECG units. IC Role / Device Role / Timing Role: OTP EPROM acting as trusted root-of-trust memory, immune to accidental overwrite during field updates or power loss events. Use Value: Dual-voltage support allows same BOM for both 3.3 V battery-powered handheld variants and 5 V docked configurations, reducing inventory SKUs. |
| Telecom Line Card Configuration | Automotive Body Control Module |
|
Use Scenario: Storing hardware-specific configuration data (e.g., port mapping, PHY settings) on modular telecom line cards inserted into multi-vendor chassis. IC Role / Device Role / Timing Role: JEDEC-compatible memory enabling plug-and-play interoperability with legacy AT27C020-based systems while lowering power consumption. Use Value: Compatibility with standard 5 V programming equipment and identical pinout to AT27C020 reduce requalification effort and tooling cost. |
Use Scenario: Storing vehicle-specific calibration parameters (e.g., window lift profiles, mirror positioning) in body control modules subject to automotive thermal cycling. IC Role / Device Role / Timing Role: OTP memory providing tamper-resistant storage of calibrated values that must persist over 15+ year vehicle lifetimes. Use Value: High-reliability CMOS process with 200 mA latchup immunity ensures robustness against load-dump transients and ground bounce in automotive electrical systems. |
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 | 5 V-only operation (4.5–5.5 V); no 3.3 V support; identical 120 ns timing and PLCC-32 package. | Restricted to fixed 5 V systems; lacks voltage flexibility for battery-backed or dual-rail designs. | Select when legacy 5 V infrastructure prohibits voltage scaling and PGM/VPP sequencing is already established. |
| MX29LV020TC-12 | 3 V flash memory (not OTP); supports erase/rewrite; 120 ns access; TSOP-32 package only - no PLCC option. | Enables field firmware updates but introduces erase-cycle wear-out and higher standby current (50 µA vs. 20 µA). | Choose only if reprogrammability is mandatory and board layout accommodates TSOP-32 footprint and erase voltage requirements. |
Compared with AT27LV020A-12JI, AT27C020-12JC offers identical timing and pinout but sacrifices low-voltage operation, while MX29LV020TC-12 trades OTP permanence and ultra-low standby for field-upgradability - making AT27LV020A-12JI optimal for cost-sensitive, battery-aware, and safety-critical firmware storage where rewrite capability is unnecessary.
Availability
AT27LV020A-12JI is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive body electronics requiring stable component supply, long-term obsolescence management, and guaranteed traceable sourcing.
Supply support for AT27LV020A-12JI 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 AT27LV020A product line delivers low-power, voltage-flexible OTP EPROMs designed for firmware storage in portable, battery-operated, and mixed-supply embedded systems where data integrity and long-term retention are critical.
FAQ
What is the maximum operating voltage for VPP during programming of the AT27LV020A-12JI?
The AT27LV020A-12JI requires VPP = 13.0 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. Exceeding 13.25 V risks permanent damage, and undershooting 12.75 V may cause incomplete programming or verification failure. This specification is verified in the DC Programming Characteristics table on page 7 of the official datasheet.
Does the AT27LV020A-12JI support true 3.3 V logic levels on its outputs when powered at 3.3 V?
Yes, the AT27LV020A-12JI produces TTL-compatible output levels (VOH ≥ 2.4 V, VOL ≤ 0.4 V) when VCC = 3.3 V and loaded with IOL = 2.0 mA or IOH = −2.0 mA, as confirmed in the DC Operating Characteristics table (page 4). This allows direct interfacing with standard 3.3 V or 5 V TTL/CMOS logic without level shifters, a key advantage over older 5 V-only EPROMs.
Can the AT27LV020A-12JI be used as a drop-in replacement for AT27C020-12JC in an existing design?
The AT27LV020A-12JI is pin-compatible and functionally equivalent to AT27C020-12JC in read mode and shares identical timing (120 ns tACC), package (PLCC-32), and programming methodology. However, it adds 3.3 V operation and requires VPP = 13.0 V instead of 21 V - so existing 21 V programming fixtures must be modified. No PCB changes are needed for read-only use.
What decoupling capacitance is required for stable operation of the AT27LV020A-12JI?
Per the System Considerations section (page 2), each AT27LV020A-12JI requires a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close to the device pins as possible. For boards with multiple EPROMs, a 4.7 µF bulk electrolytic capacitor must also be added near the power entry point to suppress array-level supply droop during simultaneous read accesses.
How is the manufacturer and device identification code accessed on the AT27LV020A-12JI?
The AT27LV020A-12JI provides a two-byte identification code: Manufacturer ID = 0x1E and Device ID = 0x86. To read it, hold all address lines A1–A17 low, set A9 = 12.0 V (VID), toggle A0 between low and high, and assert CE = OE = VIL. Output appears on O0–O7 - this feature is used by industry-standard programmers to auto-select correct algorithms and voltages for the AT27LV020A-12JI.
AT27LV020A-12JI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT27LV020A-12JI FAQ
1.How can I place an order for AT27LV020A-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV020A-12JI 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-12JI reliable?
The price and inventory of AT27LV020A-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV020A-12JI is usually 5 days.
3.What payment methods are accepted for AT27LV020A-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV020A-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV020A-12JI?
AT27LV020A-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV020A-12JI 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-12JI?
For technical support, including AT27LV020A-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV020A-12JI requirements.
6.How does Aetrix verify that AT27LV020A-12JI is sourced from the original manufacturer or authorized distributors?
All AT27LV020A-12JI 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-12JI meets industry standards.
7.What is the process for return or replacement of AT27LV020A-12JI?
All AT27LV020A-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV020A-12JI, 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-12JI part is unused and in its original packaging.
Return procedure for AT27LV020A-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27LV020A-12JI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
