My Inquiry
My Account
Microchip Technology AT27LV040A-90JI
- Part No.:
- AT27LV040A-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV040A-90JI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,002
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT27LV040A-90JI 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 CMOS/TTL-compatible I/O, 20 µA max standby current at 3.6 V, and JEDEC-standard 32-lead PLCC packaging - ideal for battery-powered portable systems requiring low-power nonvolatile storage.
For engineers reviewing the AT27LV040A-90JI datasheet, AT27LV040A-90JI pinout, AT27LV040A-90JI application, or AT27LV040A-90JI equivalent, key selection criteria include fast 90 ns read timing under 3.3 V, dual-supply compatibility for legacy 5 V and modern 3.3 V designs, industrial-grade reliability, and OTP programmability without UV erasure.
Technical Context
The AT27LV040A-90JI implements a single-supply OTP EPROM architecture with two-line control (CE/OE), enabling bus contention avoidance in multi-device memory systems. Its Rapid™ programming algorithm achieves 100 µs/byte typical write speed using 13.0 V VPP and 6.5 V VCC during programming.
It supports product identification via A9 high-voltage (12.0 V) and A0 toggle sequencing, delivering manufacturer code 0x1E and device code 0x0B. Input/output levels meet LVTTL standards, and outputs remain TTL-compatible even at 3.0 V VCC - critical for mixed-voltage system interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304-bit (512K × 8) OTP EPROM - fixed, non-erasable storage for firmware boot code or configuration data. |
| Read Access Time | 90 ns max at VCC = 3.0–3.6 V or 4.5–5.5 V - enables direct interface with 10 MHz microcontrollers without wait states. |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - supports dual-voltage system design and backward compatibility with 5 V legacy hosts. |
| Standby Current | 20 µA max at VCC = 3.6 V - reduces quiescent power in always-on embedded systems by >50× vs. standard 5 V EPROMs. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including motor drives, PLCs, and outdoor instrumentation. |
| Programming Voltage | VPP = 13.0 ± 0.25 V, VCC = 6.5 ± 0.25 V - requires dedicated programming hardware; not field-reprogrammable in-system. |
| ESD/Latchup | 2,000 V HBM ESD protection; 200 mA latchup immunity - ensures robustness during handling and board assembly. |
Pinout & Package
AT27LV040A-90JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE, with lead pitch of 1.27 mm and body size 18.5 × 18.5 mm. Pin 1 is marked by index notch and corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; TTL/CMOS compatible with VIH ≥ 2.0 V. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus; VOH ≥ 2.4 V at IOH = −2.0 mA ensures reliable logic-high drive into TTL loads. |
| CE | Chip Enable | Active-low chip select; controls device activation and entry to standby mode when high (VIH ≥ 2.0 V). |
| OE | Output Enable | Active-low output gate; allows output tri-state control independent of CE for bus sharing. |
| VCC | Power Supply | Primary supply input; must be applied simultaneously with or before VPP during programming. |
| VPP | Programming Voltage | 13.0 V programming supply; requires external 0.1 µF capacitor to ground to suppress transients during pulse application. |
| GND | Ground Reference | Signal and power return; decoupling capacitors (0.1 µF ceramic + 4.7 µF bulk) required per datasheet layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time - cuts firmware update cycles significantly versus conventional EPROMs. |
| Integrated Product ID Code | Manufacturer ID 0x1E and Device ID 0x0B readable via A9/VH + A0 toggle - enables automatic algorithm selection in production programmers. |
| Dual-Voltage Read Operation | Valid operation at 3.0–3.6 V or 4.5–5.5 V - eliminates level-shifting in hybrid voltage systems and simplifies board power architecture. |
| TTL-Compatible Outputs at 3.0 V | VOH ≥ 2.4 V at VCC = 3.0 V - directly interfaces with 5 V TTL logic without translators, reducing BOM count and signal integrity risk. |
| JEDEC-Standard Packaging | 32J PLCC footprint - ensures drop-in replacement capability and compatibility with existing socketed EPROM layouts. |
Applications
| Industrial PLC Firmware Storage | Embedded Boot ROM for 8/16-bit MCUs |
|---|---|
|
Use Scenario: Storing fixed ladder logic firmware and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 90 ns instruction fetch timing to ensure real-time scan cycle consistency. Use Value: Industrial temperature rating (−40°C to +85°C) and 2,000 V ESD tolerance prevent field failures in electrically noisy plant-floor settings. |
Use Scenario: Holding immutable startup code and peripheral initialization routines for microcontrollers in medical diagnostic instruments. IC Role / Device Role / Timing Role: OTP EPROM acting as secure, tamper-resistant boot source with no risk of accidental overwrite during power cycling. Use Value: 20 µA max standby current extends battery life in portable devices where main power may be intermittently available. |
| Legacy System Upgrade Module | Automotive Body Control Module (BCM) |
|
Use Scenario: Replacing obsolete 5 V EPROMs (e.g., AT27C040) in aging telecom line cards while retaining original PCB layout and firmware. IC Role / Device Role / Timing Role: Pin-compatible OTP memory offering identical 32-pin PLCC footprint and JEDEC-compliant timing behavior. Use Value: Dual-voltage support allows seamless integration into both legacy 5 V backplanes and newer 3.3 V subsystems without redesign. |
Use Scenario: Storing calibrated sensor lookup tables and actuator control constants in automotive BCMs operating under wide ambient conditions. IC Role / Device Role / Timing Role: High-reliability OTP storage ensuring consistent parameter recall across vehicle lifetime without wear-out concerns. Use Value: 200 mA latchup immunity protects against load-dump transients common in 12 V 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 |
|---|---|---|---|
| AT27C040-90JC | 5 V only (4.5–5.5 V); no 3.3 V operation; same 90 ns access, 32J PLCC, and pinout. | Limited to pure 5 V systems; lacks dual-voltage flexibility and low-power advantage. | Select when upgrading legacy 5 V-only designs where VCC stability precludes 3.3 V use. |
| AM27C040-90DC | 5 V only; 90 ns access; 32-pin DIP package; higher ICC active current (35 mA vs. 10 mA at 5 MHz). | Requires through-hole PCB layout; unsuitable for surface-mount industrial modules. | Choose only for through-hole prototyping or repair of vintage DIP-based systems. |
Compared with AT27C040-90JC and AM27C040-90DC, the AT27LV040A-90JI delivers lower power consumption, broader voltage compatibility, and industrial temperature qualification - making it the preferred choice for new designs targeting energy efficiency and mixed-voltage interoperability.
Availability
AT27LV040A-90JI is available at Aetrix Electronics and suitable for industrial PLCs, embedded boot systems, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AT27LV040A-90JI 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 specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV040A belongs to Atmel's low-voltage OTP EPROM product line, designed specifically to replace 5 V EPROMs in portable, battery-operated, and mixed-voltage embedded systems while maintaining JEDEC compatibility and programming ecosystem alignment.
FAQ
What is the maximum operating voltage for VPP on the AT27LV040A-90JI?
The AT27LV040A-90JI requires VPP = 13.0 ± 0.25 V during programming, with absolute maximum rating of +14.0 V on A9 and VPP pins. Exceeding 13.25 V risks unreliable programming or permanent damage; the device must never be operated with VPP connected during normal read mode.
Can the AT27LV040A-90JI operate reliably at 3.0 V VCC?
Yes, the AT27LV040A-90JI is fully specified for read operation at VCC = 3.0 V to 3.6 V, delivering ≤90 ns access time and TTL-compatible outputs. At 3.0 V, standby current remains ≤20 µA and active power dissipation is ~18 mW at 5 MHz - confirmed in the DC/AC characteristics table.
Is the AT27LV040A-90JI pin-compatible with the AT27C040?
Yes, the AT27LV040A-90JI shares identical pinout, signal definitions, and JEDEC 32-lead PLCC (32J) package with the AT27C040. It is functionally and physically compatible for drop-in replacement in existing designs, though VPP and programming voltage requirements differ.
Does the AT27LV040A-90JI support in-system programming?
No, the AT27LV040A-90JI requires external EPROM programmer hardware applying 13.0 V VPP and 6.5 V VCC. It does not support in-circuit or in-system programming; programming must occur off-board prior to soldering, as no serial or parallel ISP interface is implemented.
What decoupling capacitors are required for stable operation of the AT27LV040A-90JI?
The AT27LV040A-90JI requires a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND as close to the device as possible, plus a 4.7 µF bulk electrolytic capacitor near the power entry point of the EPROM array - both mandated in the System Considerations section to suppress transient excursions during CE switching.
AT27LV040A-90JI 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:
- 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-90JI FAQ
1.How can I place an order for AT27LV040A-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-90JI 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-90JI reliable?
The price and inventory of AT27LV040A-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-90JI is usually 5 days.
3.What payment methods are accepted for AT27LV040A-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-90JI?
AT27LV040A-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-90JI 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-90JI?
For technical support, including AT27LV040A-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-90JI requirements.
6.How does Aetrix verify that AT27LV040A-90JI is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-90JI 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-90JI meets industry standards.
7.What is the process for return or replacement of AT27LV040A-90JI?
All AT27LV040A-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-90JI, 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-90JI part is unused and in its original packaging.
Return procedure for AT27LV040A-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27LV040A-90JI 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…
