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Microchip Technology AT27LV040A-15JI
- Part No.:
- AT27LV040A-15JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV040A-15JI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
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Product details
Overview
AT27LV040A-15JI from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM with 150 ns maximum 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 embedded systems requiring nonvolatile program storage.
For engineers reviewing the AT27LV040A-15JI datasheet, AT27LV040A-15JI pinout, AT27LV040A-15JI application, or AT27LV040A-15JI equivalent, key selection criteria include read access timing, low-voltage standby power, OTP reliability, JEDEC package compatibility, and Rapid™ programming algorithm support at 100 µs/byte.
Technical Context
The AT27LV040A-15JI implements a single-supply OTP EPROM architecture with two-line control (CE/OE), enabling bus contention avoidance in shared-memory systems. Its address space spans A0–A18 (19-bit), supporting full 512K-byte decoding without external logic.
It operates in three distinct voltage modes: low-voltage read (3.0–3.6 V), standard 5V read (4.5–5.5 V), and programming (VCC = 6.5 V, VPP = 13.0 V). Output levels meet LVTTL standards at 3.3 V and TTL at 5 V, ensuring interoperability across mixed-voltage designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (512K × 8) - supports firmware or boot code storage for microcontrollers without external memory controller. |
| Access Time (tACC) | 150 ns max at VCC = 3.0–3.6 V or 4.5–5.5 V - enables direct interface with 6–7 MHz system clocks without wait states. |
| Standby Current (ISB1) | 20 µA max at VCC = 3.6 V, CE = VCC ± 0.3 V - reduces quiescent power in portable devices during sleep mode. |
| Active Current (ICC) | 10 mA max at 5 MHz, VCC = 3.6 V - delivers low-power active operation versus legacy 5V EPROMs consuming >25 mA. |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - allows drop-in replacement in dual-voltage systems and backward compatibility with AT27C040 designs. |
| Programming Algorithm | Rapid™: 100 µs/byte typical - cuts programming time by >5× vs conventional EPROM algorithms, improving production throughput. |
| ESD Protection | 2,000 V HBM - meets industrial handling requirements without additional protection circuitry on PCB. |
Pinout & Package
AT27LV040A-15JI 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-byte decode; no address multiplexing required. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus compatible with LVTTL (3.3 V) and TTL (5 V) logic families. |
| CE | Chip Enable | Active-low chip select; controls device activation and high-impedance output state during standby. |
| OE | Output Enable | Active-low output gate; enables data output only when CE is also asserted, preventing bus contention. |
| VCC | Power Supply | Primary supply input: accepts 3.0–3.6 V or 4.5–5.5 V; must be applied before/with VPP during programming. |
| VPP | Programming Voltage | 13.0 V ± 0.25 V programming supply; requires external decoupling capacitor (0.1 µF ceramic) per datasheet. |
| GND | Ground | Reference return path for all signals and supplies; requires dedicated low-inductance connection per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage compatibility | Operates identically across 3.3 V and 5 V host systems - eliminates need for level shifters in mixed-voltage boards. |
| Integrated Product ID Code | Manufacturer byte (0x1E) and device code (0x0B) accessible via A9/VH and A0 toggle - enables automated programmer recognition and algorithm selection. |
| JEDEC-standard packages | 32J PLCC footprint matches AT27C040 - allows reuse of existing PCB layouts and socket tooling. |
| Rapid™ Programming | Guaranteed 100 µs/byte write cycle with up to 10 re-attempts per byte - improves yield and reduces programming station dwell time. |
| High-reliability process | 200 mA latchup immunity and 2,000 V ESD rating - suitable for industrial environments without supplemental protection. |
Applications
| Industrial Control Firmware Storage | Legacy System Boot ROM Replacement |
|---|---|
|
Use Scenario: Storing fixed firmware for PLC modules operating in −40°C to +85°C ambient environments with limited power budgets. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to microcontroller address space; accessed during cold start and reset recovery. Use Value: 20 µA standby current extends battery backup life; 150 ns tACC ensures deterministic boot timing under real-time constraints. |
Use Scenario: Replacing obsolete 5V EPROMs in field-deployed telecom line cards where board redesign is prohibited. IC Role / Device Role / Timing Role: Drop-in ROM substitute retaining identical pinout, timing, and programming interface as AT27C040. Use Value: Dual-voltage operation allows continued use in 5V systems while enabling future migration to 3.3V logic domains. |
| Portable Medical Device Configuration | Automotive Diagnostic Tool Memory |
|
Use Scenario: Holding calibration tables and safety-critical configuration data in handheld ultrasound units powered by Li-ion batteries. IC Role / Device Role / Timing Role: OTP storage for immutable parameters; accessed only during initialization or service mode. Use Value: 3.3 V operation minimizes regulator losses; 2,000 V ESD tolerance withstands repeated handling in clinical settings. |
Use Scenario: Storing diagnostic protocol stacks and vehicle-specific lookup tables in OBD-II scan tools used across multiple vehicle generations. IC Role / Device Role / Timing Role: Read-only memory holding ISO 15765-2 and SAE J2534-compliant firmware images. Use Value: Industrial temperature rating ensures reliable operation inside vehicle cabins; Rapid™ programming accelerates firmware updates during manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-15JC | 5V-only operation (4.5–5.5 V); no 3.3 V support; same 150 ns speed and PLCC package. | Limited to legacy 5V-only systems; lacks low-power advantage for battery operation. | Select when existing design uses only 5V rails and requires zero layout change. |
| MX29LV400CTTI-15G | Flash-based (reprogrammable), 3.0–3.6 V only, 48-pin TSOP; different pinout and command set. | Enables field firmware updates but requires MCU driver integration and erase-cycle management. | Select when reprogrammability is mandatory and board revision supports new package and interface logic. |
Compared with AT27C040-15JC, the AT27LV040A-15JI adds 3.3 V operation and cuts standby power by >90%; versus MX29LV400CTTI-15G, it offers simpler interface and OTP security but no field updates - making it optimal for cost-sensitive, unchangeable firmware deployments.
Availability
AT27LV040A-15JI is available at Aetrix Electronics and suitable for industrial control firmware storage, legacy system boot ROM replacement, and portable medical device configuration requiring stable component supply and long-term obsolescence management.
Supply support for AT27LV040A-15JI 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 AT27LV040A product line delivers low-voltage, high-reliability OTP EPROMs designed for firmware storage in resource-constrained embedded systems where data immutability and mixed-voltage compatibility are critical.
FAQ
What is the maximum operating temperature range for the AT27LV040A-15JI?
The AT27LV040A-15JI is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the Ordering Information table (page 10) and Absolute Maximum Ratings section (page 3) of the official Atmel datasheet Rev. 0557B–10/98. The "I" suffix in the part number explicitly denotes industrial grade, distinguishing it from commercial-grade variants (e.g., "C" suffix).
Does the AT27LV040A-15JI support 3.3 V-only operation, or does it require 5 V for programming?
The AT27LV040A-15JI supports 3.0–3.6 V for read and standby modes, but programming requires VCC = 6.5 V and VPP = 13.0 V as specified in the DC Programming Characteristics table (page 7). The device cannot be programmed using only 3.3 V; dedicated high-voltage programming equipment is mandatory. Read functionality remains fully operational at 3.3 V.
Is the AT27LV040A-15JI pin-compatible with the AT27C040 series?
Yes - the AT27LV040A-15JI uses identical JEDEC-standard pinouts for PLCC (32J), TSOP (32T), and VSOP (32V) packages as the AT27C040. The datasheet explicitly states compatibility in the Features section and confirms matching pin functions (A0–A18, O0–O7, CE, OE, VCC, GND, VPP) in the Pin Configurations diagrams (pages 1–2). No PCB changes are needed for substitution in read-mode applications.
What is the purpose of the VPP pin on the AT27LV040A-15JI, and how must it be managed?
The VPP pin on the AT27LV040A-15JI supplies 13.0 V programming voltage during OTP write cycles. Per the datasheet (page 7), a 0.1 µF ceramic capacitor must be placed between VPP and GND to suppress transients. VPP must be applied simultaneously with or after VCC and removed simultaneously with or before VCC - violating this sequencing risks device damage or programming failure.
How does the Rapid™ Programming Algorithm improve production efficiency for the AT27LV040A-15JI?
The Rapid™ Programming Algorithm reduces AT27LV040A-15JI programming time to 100 µs per byte (typical), verified in the Features section and Rapid Programming Algorithm description (page 9). This is approximately 5× faster than conventional EPROM algorithms, directly lowering test-floor dwell time and increasing throughput in high-volume manufacturing without compromising programming yield or data retention.
AT27LV040A-15JI 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:
- 150 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-15JI FAQ
1.How can I place an order for AT27LV040A-15JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-15JI 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-15JI reliable?
The price and inventory of AT27LV040A-15JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-15JI is usually 5 days.
3.What payment methods are accepted for AT27LV040A-15JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-15JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-15JI?
AT27LV040A-15JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-15JI 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-15JI?
For technical support, including AT27LV040A-15JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-15JI requirements.
6.How does Aetrix verify that AT27LV040A-15JI is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-15JI 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-15JI meets industry standards.
7.What is the process for return or replacement of AT27LV040A-15JI?
All AT27LV040A-15JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-15JI, 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-15JI part is unused and in its original packaging.
Return procedure for AT27LV040A-15JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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