My Inquiry
My Account
Microchip Technology AT27LV020A-12JU-T
- Part No.:
- AT27LV020A-12JU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV020A-12JU-T.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:750
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT27LV020A-12JU-T from Atmel is a 2 Mbit (256K × 8) one-time programmable EPROM optimized for low-voltage, battery-powered systems. It operates from a single 3.0–3.6 V supply with 120 ns read access time, delivers TTL-compatible outputs at 3.3 V, and supports dual-voltage operation (3.0–3.6 V or 4.5–5.5 V), enabling use in mixed-voltage embedded controllers and legacy 5 V host cards.
For engineers reviewing the AT27LV020A-12JU-T datasheet, AT27LV020A-12JU-T pinout, AT27LV020A-12JU-T application, or AT27LV020A-12JU-T equivalent, key selection criteria include its JEDEC-standard 32-lead PLCC package, two-line control (CE/OE), rapid 100 µs/byte programming, sub-1 µA typical standby current at 3.3 V, and integrated product identification code for automated programming equipment compatibility.
Technical Context
The AT27LV020A-12JU-T implements a CMOS OTP EPROM architecture with address decoding logic for 18-bit addressing (A0–A17), eight bidirectional data outputs (O0–O7), and dedicated PGM and VPP pins for high-voltage programming. Its dual-voltage design enables direct interface with both 3.3 V microcontrollers and 5 V legacy systems without level-shifting.
It uses a rapid programming algorithm requiring VCC = 6.5 V and VPP = 13.0 V, with verification loops per byte and up to 10 pulses per failed location. The integrated product ID code (0x1E/0x86) is accessed via A9 = 12.0 V and A0 toggling, ensuring compatibility with standard EPROM programmers used for AT27C020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2,097,152 bits (256K × 8) - supports firmware storage for 8-bit microcontrollers and boot code in industrial controllers. |
| Read access time | 120 ns max at VCC = 3.0–3.6 V - enables real-time execution from ROM in systems with ≤8.3 MHz bus clocks. |
| Supply voltage range | 3.0–3.6 V or 4.5–5.5 V - allows drop-in replacement in both modern low-power and legacy 5 V designs without redesign. |
| Standby current | 20 µA max (1 µA typical) at 3.6 V - extends battery life in portable instrumentation and handheld terminals. |
| Active power dissipation | 29 mW max at 5 MHz and 3.6 V - reduces thermal load in dense PCB layouts with multiple memory devices. |
| 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 automation, motor drives, and outdoor telecom equipment. |
Pinout & Package
AT27LV020A-12JU-T is housed in a JEDEC-standard 32-lead plastic J-leaded chip carrier (PLCC), designated 32J, with 1.27 mm pitch and dimensions 12.47 mm × 14.96 mm × 3.35 mm (max height). Pin 1 identifier is marked with a corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address inputs | 18-bit address bus interface; supports full 256K address space; TTL/CMOS compatible thresholds. |
| O0–O7 | Data outputs | 8-bit bidirectional data bus; VOH ≥ 2.4 V at IOH = −2.0 mA (3.3 V), ensuring robust noise margin with 5 V TTL loads. |
| CE | Chip enable | Active-low global device select; controls entry into standby mode (ISB ≤ 20 µA) when high. |
| OE | Output enable | Active-low output gate; enables high-impedance state (tDF = 40 ns) to prevent bus contention. |
| PGM | Program strobe | Active-low programming pulse input; triggers 100 µs internal write cycle when VPP = 13.0 V applied. |
| VPP | Programming voltage | 13.0 V ± 0.25 V programming supply; must be applied simultaneously with VCC during rapid programming. |
| VCC | Power supply | 3.0–3.6 V or 4.5–5.5 V main supply; powers core logic and I/O buffers; requires local 0.1 µF ceramic decoupling. |
| GND | Ground reference | Signal and power return; tied to system ground plane; critical for ESD immunity (2,000 V HBM). |
| NC | No connect | Unbonded pin; must remain unconnected on PCB to avoid parasitic coupling or latchup risk. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid programming algorithm | 100 µs/byte typical programming time with automatic verify-reprogram loop ensures high-yield production programming without manual intervention. |
| Two-line control (CE/OE) | Independent chip and output enables allow flexible bus arbitration in multi-device systems and eliminate need for external gating logic. |
| Integrated product ID code | Manufacturer ID (0x1E) and device ID (0x86) accessible via A9 = 12.0 V and A0 toggle - enables auto-detection and algorithm selection in universal programmers. |
| TTL/CMOS I/O compatibility | Inputs meet LVTTL thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V); outputs drive 5 V TTL loads at 3.3 V VCC - eliminates level shifters in mixed-voltage boards. |
| Green Pb/halide-free packaging | Matte tin lead finish on 32J PLCC package complies with RoHS Directive 2011/65/EU and JEDEC JS709B requirements. |
Applications
| Industrial PLC Firmware Storage | Legacy Card-Based Instrumentation |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O mapping tables in DIN-rail mounted programmable logic controllers operating in factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile firmware ROM providing deterministic boot-time instruction fetch with 120 ns latency and -40°C to +85°C reliability. Use Value: Eliminates need for external voltage translators due to 3.3 V operation with 5 V TTL bus compatibility, reducing BOM count and board area. | Use Scenario: Replacing obsolete 5 V EPROMs in aging test equipment and data acquisition cards designed for ISA or PCI-104 buses. IC Role / Device Role / Timing Role: Drop-in OTP memory upgrade enabling continued production of legacy hardware without PCB redesign or layout changes. Use Value: Dual-voltage support (3.0–3.6 V or 4.5–5.5 V) and identical pinout to AT27C020 ensure functional and mechanical compatibility with existing sockets and firmware images. |
| Portable Medical Diagnostic Terminals | Automotive Body Control Modules |
Use Scenario: Holding calibration constants and UI assets in handheld ultrasound or glucose meter devices powered by single-cell Li-ion batteries (3.0–3.6 V nominal). IC Role / Device Role / Timing Role: Low-power boot ROM delivering <1 µA standby current and fast read access to sustain >100-hour battery life between charges. Use Value: Sub-30 mW active power at 5 MHz minimizes self-heating in sealed enclosures, preserving sensor accuracy and display contrast. | Use Scenario: Storing configuration data and diagnostic lookup tables in under-hood body control units exposed to automotive-grade thermal cycling and EMI. IC Role / Device Role / Timing Role: Radiation-tolerant OTP memory with 2,000 V HBM ESD rating and 200 mA latchup immunity for harsh electrical environments. Use Value: Industrial temperature grade (-40°C to +85°C) and green packaging meet AEC-Q200 stress test requirements for non-safety-critical ECUs. |
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 | 5 V only operation (4.5–5.5 V); no low-voltage mode; identical 32J PLCC package and pinout. | Requires 5 V supply rail; not suitable for battery-powered or mixed-voltage systems. | Select when legacy 5 V infrastructure is fixed and low-power operation is unnecessary. |
| MX27C2000PC-12 | 5 V-only, 2 Mbit OTP EPROM in 28-pin DIP; different package, pin count, and pin assignment. | Not pin-compatible; requires PCB redesign and socket replacement; lacks integrated ID code. | Consider only if DIP form factor is mandatory and PLCC footprint is unavailable. |
Compared with AT27C020-12JU and MX27C2000PC-12, the AT27LV020A-12JU-T uniquely supports dual-voltage operation while retaining full software and programming compatibility with AT27C020, enabling seamless migration from 5 V to low-power designs without firmware or tooling changes.
Availability
AT27LV020A-12JU-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy card-based instrumentation, portable medical diagnostic terminals, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for AT27LV020A-12JU-T 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 manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV020A-12JU-T belongs to Atmel's legacy OTP EPROM product line, engineered for reliable, cost-effective firmware storage in systems where reprogrammability is unnecessary but long-term data retention and low-power operation are critical.
FAQ
What is the maximum read access time specification for AT27LV020A-12JU-T?
The AT27LV020A-12JU-T has a guaranteed maximum read access time of 120 ns when VCC is within 3.0–3.6 V and operating conditions meet datasheet limits. This timing applies to both address-to-output (tACC) and chip-enable-to-output (tCE) delays, supporting systems with clock frequencies up to approximately 8.3 MHz. The "-12" suffix explicitly denotes this 120 ns speed grade.
Can AT27LV020A-12JU-T operate with a 5 V supply, and how does it compare to 5 V-only EPROMs?
Yes, AT27LV020A-12JU-T supports dual-voltage operation: it functions correctly with VCC = 4.5–5.5 V, matching standard 5 V TTL logic levels. Unlike 5 V-only parts such as AT27C020-12JU, the AT27LV020A-12JU-T retains identical functionality and pinout while adding 3.0–3.6 V capability - enabling backward compatibility in legacy systems and forward compatibility in new low-power designs.
Does AT27LV020A-12JU-T require special programming voltage, and what are the key programming conditions?
Yes, AT27LV020A-12JU-T requires VPP = 13.0 V ± 0.25 V and VCC = 6.5 V ± 0.25 V during programming, with both supplies applied simultaneously. Programming uses a 100 µs PGM pulse width and an automated verify-reprogram loop per byte. The integrated product ID code (0x1E/0x86) ensures compatibility with standard AT27C020 programming algorithms and equipment.
What is the purpose of the NC pin on AT27LV020A-12JU-T, and how should it be handled on the PCB?
The NC (No Connect) pin on AT27LV020A-12JU-T is an unconnected die pad with no internal bond wire. It must remain electrically floating and unattached on the PCB - neither tied to VCC, GND, nor any signal trace. Connecting it risks introducing parasitic capacitance, noise coupling, or latchup paths, especially given the device's 200 mA latchup immunity specification and industrial operating environment.
How does the standby current of AT27LV020A-12JU-T compare between CMOS and TTL input configurations?
AT27LV020A-12JU-T specifies two standby current modes: ISB1 (CMOS) is ≤20 µA when CE = VCC ± 0.3 V, and ISB2 (TTL) is ≤100 µA when CE = 2.0–VCC + 0.5 V. For ultra-low-power applications like battery-operated devices, driving CE with a CMOS-level signal (e.g., from an MCU GPIO) achieves the lowest possible quiescent draw - typically <1 µA - maximizing operational runtime.
AT27LV020A-12JU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for AT27LV020A-12JU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV020A-12JU-T 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-T reliable?
The price and inventory of AT27LV020A-12JU-T 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-T is usually 5 days.
3.What payment methods are accepted for AT27LV020A-12JU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV020A-12JU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV020A-12JU-T?
AT27LV020A-12JU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV020A-12JU-T 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-T?
For technical support, including AT27LV020A-12JU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV020A-12JU-T requirements.
6.How does Aetrix verify that AT27LV020A-12JU-T is sourced from the original manufacturer or authorized distributors?
All AT27LV020A-12JU-T 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-T meets industry standards.
7.What is the process for return or replacement of AT27LV020A-12JU-T?
All AT27LV020A-12JU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV020A-12JU-T, 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-T part is unused and in its original packaging.
Return procedure for AT27LV020A-12JU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27LV020A-12JU-T 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…
