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Microchip Technology AT27BV1024-90JU-T
- Part No.:
- AT27BV1024-90JU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27BV1024-90JU-T.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,125
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Product details
Overview
AT27BV1024-90JU-T from Microchip Technology (formerly Atmel) is a 1,048,576-bit one-time programmable EPROM organized as 64K × 16, operating at 2.7V–3.6V or 4.5V–5.5V, with 90ns read access time and industrial temperature range (−40°C to +85°C). It serves as non-volatile program storage in battery-powered microprocessor systems requiring low-power, dual-voltage compatibility, and JEDEC-standard PLCC packaging.
For engineers reviewing the AT27BV1024-90JU-T datasheet, AT27BV1024-90JU-T pinout, AT27BV1024-90JU-T application, or AT27BV1024-90JU-T equivalent, key selection criteria include its OTP architecture, 44-lead PLCC package, rapid 100µs/word programming, <1µA typical standby current at 3V, and dual-supply interface compatibility with both TTL and LVBO logic families.
Technical Context
The AT27BV1024-90JU-T implements a CMOS-based OTP EPROM core with two-line control (CE/OE), enabling bus contention avoidance in shared-memory systems. Its architecture supports rapid programming via 100µs PGM pulses at VCC = 6.5V and VPP = 13.0V, with integrated product identification code for automated programming equipment recognition.
It delivers TTL-level outputs at VCC = 3.0V compatible with 5V logic, while at VCC = 2.7V it meets JEDEC LVBO specifications. The device features 2,000V ESD protection and 200mA latchup immunity, ensuring robust operation in industrial environments without external voltage regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1,048,576-bit (64K × 16), enabling full firmware storage for 16-/32-bit microprocessors |
| Read access time | 90ns max at VCC = 2.7V–3.6V or 4.5V–5.5V, matching performance of legacy 5V EPROMs |
| Supply voltage range | 2.7V–3.6V (unregulated battery) or 4.5V–5.5V (standard), eliminating need for LDO in portable designs |
| Standby current | 20µA max (CMOS mode), <1µA typical at 3V - extends battery life in always-on embedded systems |
| Active power dissipation | 36mW max at 5MHz and VCC = 3.6V, less than 20% of equivalent 5V EPROMs |
| Programming speed | 100µs/word typical, reducing production programming cycle time versus conventional EPROMs |
| Operating temperature | −40°C to +85°C case temperature, qualified for industrial-grade system deployment |
Pinout & Package
AT27BV1024-90JU-T is housed in a 44-lead plastic J-leaded chip carrier (PLCC), JEDEC MS-018 AC compliant, with pins 1 and 23 designated NC (no connect) and both GND pins requiring connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address inputs | 16-bit address bus interface supporting full 64K word decoding |
| O0–O15 | Data outputs | 16-bit bidirectional data path; outputs driven only when CE and OE are active low |
| CE | Chip enable | Primary device select; high-Z output when high, enabling multi-device memory mapping |
| OE | Output enable | Secondary output control; allows CE-driven chip selection while gating output timing independently |
| PGM | Program strobe | Triggers 100µs programming pulse during VPP = 13.0V mode; inactive during read operations |
| VPP | Programming voltage | 13.0V ± 0.25V input required only during programming; must be applied simultaneously with VCC |
| NC | No connect | Pins 1 and 23 are internally unconnected; must remain floating per JEDEC PLCC specification |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage operation | Supports direct connection to unregulated Li-ion or alkaline battery packs (2.7V–3.6V) or legacy 5V rails without level-shifting circuitry |
| JEDEC PLCC pin compatibility | Drop-in replacement for AT27C1024 in existing 44-lead PLCC footprints, preserving PCB layout and socket infrastructure |
| Rapid programming algorithm | Reduces factory programming time by >90% vs. standard UV-erasable EPROMs, with built-in verify-reprogram loop up to 10 pulses per word |
| Integrated product ID code | Enables automatic detection by industry-standard programmers (e.g., BP Microsystems, Xeltek), eliminating manual part selection errors |
| Low-power CMOS design | Eliminates need for external power management ICs in portable systems - standby current <1µA at 3V enables years of shelf life |
Applications
| Handheld Medical Diagnostic Device | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Battery-powered ultrasound probe storing boot firmware and calibration tables. IC Role / Device Role / Timing Role: OTP EPROM providing non-volatile, tamper-resistant program memory with guaranteed retention over 10+ years. Use Value: 2.7V–3.6V operation eliminates voltage regulator, reducing BOM cost and board space; 90ns access ensures real-time boot execution. | Use Scenario: Embedded controller in factory automation module requiring field-upgradeable firmware image. IC Role / Device Role / Timing Role: One-time programmable memory holding verified firmware images before deployment to prevent accidental corruption. Use Value: Rapid 100µs/word programming accelerates manufacturing test cycles; industrial temp rating ensures reliability in cabinet-mounted environments. |
| Avionics Data Logger Module | Legacy Industrial Instrumentation Upgrade |
Use Scenario: Crash-survivable flight data recorder using unregulated 3.3V backup battery. IC Role / Device Role / Timing Role: Primary firmware storage with ESD-hardened I/O (2,000V HBM) and latchup immunity (200mA) for harsh EMI environments. Use Value: Dual-supply compatibility allows seamless integration into mixed-voltage avionics backplanes without level translators. | Use Scenario: Retrofitting obsolete 5V EPROM-based test equipment with modern low-power alternative. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for AT27C1024, retaining original PCB and socket. Use Value: Maintains full system functionality while cutting standby power by >95% - critical for energy-constrained legacy installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C1024-90JU | 5V-only supply (4.5V–5.5V); no low-voltage operation; identical 90ns tACC and 44-lead PLCC package | Requires regulated 5V rail; unsuitable for battery-powered systems | Select when legacy 5V infrastructure is fixed and low-voltage capability is unnecessary |
| MX29LV160DBTI-90G | Flash memory (not OTP); 3.0V supply; 16Mb density; different command set and write endurance | Supports in-system reprogramming; requires firmware changes for erase/write protocols | Select when field updates are required and OTP immutability is not mandatory |
Compared with AT27C1024-90JU, the AT27BV1024-90JU-T adds battery-friendly low-voltage operation but retains identical pinout and programming flow; compared with MX29LV160DBTI-90G, it trades reprogrammability for guaranteed data integrity and simpler interface logic in fixed-firmware deployments.
Availability
AT27BV1024-90JU-T is available at Aetrix Electronics and suitable for industrial PLCs, handheld medical devices, avionics data loggers, and legacy instrumentation upgrades requiring stable component supply, long-term lifecycle support, and JEDEC-compliant OTP memory.
Supply support for AT27BV1024-90JU-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
Microchip Technology acquired Atmel in 2016 and maintains its legacy EPROM, Flash, and microcontroller product lines with full documentation, programming tool support, and long-term availability commitments.
The AT27BV1024-90JU-T belongs to Atmel's industrial-grade OTP EPROM family, designed specifically for cost-sensitive, high-reliability embedded systems where firmware immutability, low-power operation, and drop-in compatibility with legacy 5V designs are critical requirements.
FAQ
What is the programming voltage requirement for AT27BV1024-90JU-T?
The AT27BV1024-90JU-T requires VPP = 13.0V ± 0.25V during programming, applied simultaneously with VCC = 6.5V ± 0.25V. This high-voltage programming mode is used exclusively for the initial one-time programming sequence; no VPP is needed during normal read operation. The AT27BV1024-90JU-T integrates product identification logic that validates correct VPP application before accepting programming commands.
Is AT27BV1024-90JU-T pin-compatible with AT27C1024-90JU?
Yes, AT27BV1024-90JU-T is fully pin-compatible with AT27C1024-90JU in the 44-lead PLCC package, including identical pin functions, spacing, and mechanical footprint. Both share the same A0–A15, O0–O15, CE, OE, PGM, VPP, VCC, and GND assignments. The AT27BV1024-90JU-T maintains this compatibility while adding dual-voltage operation and lower standby current.
What is the maximum operating frequency supported by AT27BV1024-90JU-T?
The AT27BV1024-90JU-T does not operate at a clock frequency; it is an asynchronous memory device. Its timing is defined by access parameters: tACC and tCE are both 90ns maximum, enabling reliable interface with microprocessors running up to approximately 11 MHz bus cycles (1/90ns ≈ 11.1 MHz). The AT27BV1024-90JU-T achieves this performance across its full 2.7V–3.6V and 4.5V–5.5V supply ranges without external wait-state generation.
Does AT27BV1024-90JU-T require external decoupling capacitors?
Yes, AT27BV1024-90JU-T requires a 0.1µF ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins, to suppress switching transients during CE/OE transitions. For systems with multiple AT27BV1024-90JU-T devices, a 4.7µF bulk electrolytic capacitor should also be added near the power entry point. These capacitors are mandatory per the AT27BV1024-90JU-T datasheet to ensure signal integrity and prevent non-conformance due to voltage excursions.
Can AT27BV1024-90JU-T be used in automotive applications?
No, AT27BV1024-90JU-T is not qualified for automotive applications. Its industrial temperature range (−40°C to +85°C) and qualification profile do not meet AEC-Q100 requirements. Microchip's official documentation explicitly states that Atmel products - including the AT27BV1024-90JU-T - are not intended, authorized, or warranted for use in automotive safety-critical or mission-critical systems. For automotive use, consider Microchip's AEC-Q100-qualified serial Flash or EEPROM alternatives instead of the AT27BV1024-90JU-T.
AT27BV1024-90JU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 1Mbit
- Memory Organization:
- 64K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 90 ns
- Voltage - Supply:
- 2.7V ~ 3.6V, 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT27BV1024-90JU-T FAQ
1.How can I place an order for AT27BV1024-90JU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV1024-90JU-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 AT27BV1024-90JU-T reliable?
The price and inventory of AT27BV1024-90JU-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV1024-90JU-T is usually 5 days.
3.What payment methods are accepted for AT27BV1024-90JU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV1024-90JU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV1024-90JU-T?
AT27BV1024-90JU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV1024-90JU-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 AT27BV1024-90JU-T?
For technical support, including AT27BV1024-90JU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV1024-90JU-T requirements.
6.How does Aetrix verify that AT27BV1024-90JU-T is sourced from the original manufacturer or authorized distributors?
All AT27BV1024-90JU-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 AT27BV1024-90JU-T meets industry standards.
7.What is the process for return or replacement of AT27BV1024-90JU-T?
All AT27BV1024-90JU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV1024-90JU-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 AT27BV1024-90JU-T part is unused and in its original packaging.
Return procedure for AT27BV1024-90JU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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