My Inquiry
My Account
Microchip Technology AT27LV040A-15JC
- Part No.:
- AT27LV040A-15JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV040A-15JC.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,778
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT27LV040A-15JC from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM optimized for low-voltage battery-powered systems, featuring 150 ns max read access time at 3.0–3.6 V or 4.5–5.5 V, 20 µA max standby current, JEDEC-standard 32-lead PLCC package, and dual-voltage compatibility with TTL/CMOS logic interfaces.
For engineers reviewing the AT27LV040A-15JC datasheet, AT27LV040A-15JC pinout, AT27LV040A-15JC application, or AT27LV040A-15JC equivalent, this OTP EPROM supports portable embedded firmware storage, legacy system upgrades, and industrial controller boot memory where low-power 3.3V operation and 5V backward compatibility are required.
Technical Context
The AT27LV040A-15JC implements a standard OTP EPROM architecture with two-line control (CE/OE), enabling bus contention prevention in shared-memory systems. Its address space spans A0–A18 (19-bit), supporting full 512K-byte decoding without external address latching.
It operates in three distinct voltage modes: 3.0–3.6 V read/standby, 4.5–5.5 V read/standby, and 6.5 V VCC + 13.0 V VPP during programming. Output drive meets LVTTL levels (VOH ≥ 2.4 V at IOH = −2.0 mA; VOL ≤ 0.4 V at IOL = 2.0 mA) across both supply ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (512K × 8), sufficient for full BIOS/firmware images in legacy embedded controllers. |
| Read Access Time (tACC) | 150 ns max at VCC = 3.0–3.6 V or 4.5–5.5 V - defines worst-case CPU wait-state timing in 8/16-bit microprocessor buses. |
| Standby Current (ISB1) | 20 µA max at VCC = 3.6 V, CE = VCC ± 0.3 V - enables multi-year battery life in always-on portable instrumentation. |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V for read/standby; 6.5 V VCC + 13.0 V VPP required only during programming - eliminates need for dedicated 12V rails in field-programmable systems. |
| Input/Output Compatibility | JEDEC LVTTL-compliant inputs and outputs - ensures direct interfacing with 3.3V and 5V microcontrollers without level-shifting circuitry. |
| Programming Algorithm | Rapid™ 100 µs/byte typical - reduces production programming time by >5× versus conventional EPROMs, improving throughput in firmware provisioning lines. |
Pinout & Package
AT27LV040A-15JC is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC) per JEDEC MS-016 AE, with gull-wing leads and pin 1 index mark. The package is surface-mount compatible and rated for commercial temperature range (0°C to 70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit parallel address bus; fully decoded to select one of 524,288 bytes - no external address demultiplexing needed. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus in read mode; high-impedance when OE or CE inactive - prevents bus conflicts in multiprocessor systems. |
| CE | Chip Enable | Active-low chip select; controls device power state - assertion enables active current (ICC = 10 mA @ 5 MHz), deassertion forces standby (ISB1 ≤ 20 µA). |
| OE | Output Enable | Active-low output gate; decouples data bus without disabling internal logic - allows interleaved memory access in burst-mode controllers. |
| VCC | Power Supply | Primary supply input for logic and I/O; accepts 3.0–3.6 V or 4.5–5.5 V - enables single-rail design in mixed-voltage PCBs. |
| VPP | Programming Voltage | 13.0 V programming supply input; must be applied after and removed before VCC - prevents latch-up during field reprogramming. |
| GND | Ground Reference | Common return path for VCC and VPP; requires local 0.1 µF ceramic decoupling per device to suppress transient noise during CE transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Read Operation | Operates identically at 3.3 V or 5 V without configuration - simplifies migration from legacy 5V designs to low-power platforms. |
| Integrated Product ID Code | Manufacturer byte (0x1E) and device code byte (0x0B) accessible via A9/VH and A0 toggle - enables automated programmer validation and BOM traceability. |
| Rapid™ Programming | 100 µs/byte typical write cycle with up to 10 retries per byte - guarantees >99.99% programming yield in high-volume manufacturing. |
| ESD & Latchup Robustness | 2,000 V HBM ESD rating and 200 mA latchup immunity - eliminates need for external protection diodes in industrial control panel designs. |
| JEDEC Standard Pinout | Pin-compatible with AT27C040 and industry-standard 32-pin EPROM footprints - allows drop-in replacement without PCB redesign. |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Backup |
|---|---|
Use Scenario: Non-volatile storage of ladder logic firmware in DIN-rail mounted programmable logic controllers exposed to wide ambient temperatures and electrical noise. IC Role / Device Role / Timing Role: Primary boot ROM holding initialization code and runtime instruction set; accessed sequentially during cold start with tACC ≤ 150 ns meeting 6-MHz Z80 bus timing. Use Value: 20 µA standby current extends backup battery life beyond 10 years; 3.3V/5V dual operation avoids voltage translation in mixed-signal backplanes. |
Use Scenario: Secondary firmware image storage on ISA/PCI add-in cards used for BIOS recovery in vintage x86 workstations and servers. IC Role / Device Role / Timing Role: Shadow ROM mapped into upper memory area (UMA); read under CPU control during POST with CE/OE handshaking synchronized to 8-MHz clock domain. Use Value: JEDEC PLCC footprint matches original AT27C040 layout - zero PCB change required; LVTTL outputs interface directly with 74LS245 bus transceivers. |
| Portable Medical Instrument Boot Memory | Automated Test Equipment Configuration |
Use Scenario: Power-critical handheld diagnostic devices requiring guaranteed firmware integrity over 5+ year shelf life without recharge cycles. IC Role / Device Role / Timing Role: Static code storage executed directly from address bus; no cache or prefetch - relies on deterministic 150 ns tACC for real-time interrupt response. Use Value: <1 µA typical standby current at 3.3 V enables >7-year battery retention; integrated ID code validates firmware authenticity pre-boot. |
Use Scenario: Field-configurable test head modules storing calibration constants, fixture mapping tables, and protocol stacks for semiconductor ATE platforms. IC Role / Device Role / Timing Role: Read-only configuration database accessed via microcontroller SPI-to-parallel bridge; CE toggled per record fetch to minimize active power. Use Value: Rapid™ programming allows in-factory firmware updates during final test; 200 mA latchup immunity withstands ESD events during probe card handling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-12JC | 5V-only operation (4.5–5.5 V); 120 ns tACC; no 3.3V support; identical PLCC-32 pinout and programming algorithm. | Requires dedicated 5V rail; unsuitable for battery-powered or mixed-voltage systems. | Select when legacy 5V infrastructure is fixed and lowest-cost OTP solution is prioritized. |
| MX29LV400CBTI-90G | 3.3V-only Flash (not OTP); 90 ns tACC; sector erase capability; different command-set and pinout (no VPP, uses A16/A17 for commands). | Enables in-system reprogramming but requires firmware rewrite and PCB layout change due to non-pin-compatible interface. | Select only if field firmware updates are mandatory and redesign effort is acceptable. |
Compared with AT27C040-12JC, the AT27LV040A-15JC adds 3.3V operation and relaxed timing margin (150 ns vs. 120 ns), trading speed for broader supply flexibility; versus MX29LV400CBTI-90G, it offers true OTP security and zero-layout-change replacement but lacks reprogrammability.
Availability
AT27LV040A-15JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS backup, and portable medical instrument boot memory requiring stable component supply across extended product lifecycles.
Supply support for AT27LV040A-15JC 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, designed high-reliability non-volatile memory and microcontroller solutions for industrial, automotive, and computing markets before its 2016 acquisition.
The AT27LV040A belongs to Atmel's low-voltage OTP EPROM product line, engineered specifically for cost-sensitive, battery-operated, and legacy-system upgrade applications where data permanence, dual-voltage compatibility, and JEDEC footprint adherence are critical.
FAQ
What voltage supplies are required for normal read operation of the AT27LV040A-15JC?
The AT27LV040A-15JC supports two independent read supply ranges: 3.0 V to 3.6 V or 4.5 V to 5.5 V. Both ranges deliver identical 150 ns maximum access time and full LVTTL-compatible I/O performance. No intermediate voltages (e.g., 3.3 V ±5%) are specified - operation outside these bands may result in timing violations or data corruption. VPP is not used during read mode.
Is the AT27LV040A-15JC pin-compatible with the AT27C040 series?
Yes, the AT27LV040A-15JC shares identical pin functions, ordering codes (e.g., -15JC denotes 32-lead PLCC), and JEDEC MS-016 AE package dimensions with the AT27C040 family. All address, data, control, and power pins map one-to-one, enabling direct PCB substitution without layout modification - provided the host system accommodates the lower 3.3V supply option.
What is the programming voltage requirement for the AT27LV040A-15JC?
Programming the AT27LV040A-15JC requires VCC = 6.5 V ± 0.25 V and VPP = 13.0 V ± 0.25 V applied simultaneously, with VCC established before and removed after VPP. A 0.1 µF capacitor must be placed between VPP and GND to suppress transients. These voltages are only needed during programming - they are not present during read or standby operation.
Does the AT27LV040A-15JC support industrial temperature range operation?
No - the AT27LV040A-15JC is specified only for commercial temperature range (0°C to +70°C), as indicated by the "C" suffix in the ordering code. Industrial-grade variants exist (e.g., AT27LV040A-15JI), but the -15JC variant is explicitly rated for 0°C to 70°C ambient operation and must not be deployed in environments exceeding this range without derating validation.
How does the Rapid™ Programming Algorithm improve production efficiency for the AT27LV040A-15JC?
The Rapid™ Programming Algorithm reduces average programming time to ~100 µs per byte by using short, precise 95–105 µs CE pulses and an adaptive verify-reprogram loop. This cuts total 4-Mbit programming time to under 6 minutes versus >30 minutes for conventional EPROM algorithms, significantly increasing throughput in high-volume firmware provisioning lines while maintaining >99.99% yield.
AT27LV040A-15JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT27LV040A-15JC FAQ
1.How can I place an order for AT27LV040A-15JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-15JC 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-15JC reliable?
The price and inventory of AT27LV040A-15JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-15JC is usually 5 days.
3.What payment methods are accepted for AT27LV040A-15JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-15JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-15JC?
AT27LV040A-15JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-15JC 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-15JC?
For technical support, including AT27LV040A-15JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-15JC requirements.
6.How does Aetrix verify that AT27LV040A-15JC is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-15JC 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-15JC meets industry standards.
7.What is the process for return or replacement of AT27LV040A-15JC?
All AT27LV040A-15JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-15JC, 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-15JC part is unused and in its original packaging.
Return procedure for AT27LV040A-15JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27LV040A-15JC 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…
