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Microchip Technology AT27BV1024-90JU
- Part No.:
- AT27BV1024-90JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27BV1024-90JU.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:689
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Product details
Overview
AT27BV1024-90JU from Atmel is a 1,048,576-bit (64K × 16) one-time programmable EPROM with 90ns read access time, dual-voltage operation (2.7V–3.6V or 4.5V–5.5V), and JEDEC-standard 44-lead PLCC packaging. It delivers TTL- and CMOS-compatible I/O, <1µA typical standby current at 3V, and rapid 100µs/word programming - ideal for battery-powered 16-/32-bit microprocessor systems requiring low-power nonvolatile storage.
For engineers reviewing the AT27BV1024-90JU datasheet, AT27BV1024-90JU pinout, AT27BV1024-90JU application, or AT27BV1024-90JU equivalent, key selection criteria include its OTP architecture, dual-supply compatibility, industrial temperature range (−40°C to +85°C), JEDEC pin compatibility with AT27C1024, and integrated product identification code for automated programming.
Technical Context
The AT27BV1024-90JU implements a two-line control interface (CE/OE) enabling bus contention avoidance in shared-memory systems. Its x16 data bus organization supports direct interfacing with 16-bit microprocessors and DSPs without external data-width translation.
It operates across two distinct supply regimes: unregulated battery mode (2.7V–3.6V) with TTL-level outputs at 3.0V, and standard 5V ±10% mode compliant with LVTTL/LVBO specifications. Programming requires VCC = 6.5V and VPP = 13.0V, with a verified 100µs pulse width and up to 10 retries per word during rapid programming verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1,048,576-bit (64K × 16) OTP EPROM - supports full 16-bit data bus mapping without multiplexing |
| Read access time | 90ns max at VCC = 2.7V–3.6V - enables real-time instruction fetch in portable embedded systems |
| Supply voltage range | 2.7V–3.6V (battery) or 4.5V–5.5V (5V system) - eliminates need for voltage regulation in mixed-supply designs |
| Standby current | 20µA max (CMOS mode), <1µA typical at 3V - extends battery life in always-on memory retention applications |
| Active power dissipation | 36mW max at 5MHz and VCC = 3.6V - consumes <20% of equivalent 5V EPROMs, reducing thermal load |
| Programming speed | 100µs/word typical - reduces production programming cycle time vs. legacy EPROMs |
| Operating temperature | −40°C to +85°C (industrial grade) - qualified for deployment in automotive under-hood and industrial control environments |
Pinout & Package
AT27BV1024-90JU is housed in a JEDEC-standard 44-lead plastic J-leaded chip carrier (PLCC), package code 44J, with pins 1 and 23 designated as no-connect (NC). Both GND pins (pins 7 and 22) must be connected for reliable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address inputs | 16-bit address bus supporting full 64K-word addressing; all inputs CMOS/TTL compatible |
| O0–O15 | Data outputs | 16-bit bidirectional output bus; VOH/VOL meet TTL thresholds at VCC = 3.0V and LVTTL at VCC = 2.7V |
| CE | Chip enable | Active-low global enable; controls device activation and high-impedance output state during standby |
| OE | Output enable | Active-low output gate; allows multiple devices on same data bus without bus contention |
| PGM | Program strobe | Active-low programming trigger; initiates 100µs pulse programming cycle when VPP = 13.0V |
| VPP | Programming voltage | 13.0V ±0.25V input required only during programming; must be applied simultaneously with VCC |
| VCC | Power supply | 2.7V–3.6V or 4.5V–5.5V; powers logic and I/O; supplies ICC ≤8mA (3.6V/5MHz) and ISB ≤20µA |
| GND | Ground | Two dedicated ground pins (7, 22); mandatory connection for noise immunity and ESD robustness |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage read operation | Supports both unregulated battery (2.7V–3.6V) and standard 5V systems without hardware redesign |
| Rapid 100µs/word programming | Reduces factory programming time by >5× vs. conventional EPROMs; includes auto-verify loop |
| Integrated product ID code | Manufacturer ID (001Eh) and device code (00F1h) accessible via A9/VH and A0 toggling - enables automatic algorithm selection in programmers |
| 2,000V HBM ESD protection | Meets industrial handling requirements; eliminates need for external ESD clamping in most PCB layouts |
| JEDEC-compliant PLCC package | 44J footprint ensures drop-in replacement for AT27C1024 and compatibility with existing PLCC sockets and reflow profiles |
Applications
| Handheld Medical Diagnostic Device | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Portable ultrasound or glucose meter storing calibrated firmware and lookup tables in battery-operated field units. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code and calibration constants; accessed during cold start and runtime parameter recall. Use Value: 90ns access time enables immediate firmware execution; <1µA standby current preserves battery charge over multi-week idle periods. | Use Scenario: Fixed-mount programmable logic controller retaining ladder logic and I/O configuration across power cycles in factory automation. IC Role / Device Role / Timing Role: OTP firmware ROM mapped into microcontroller address space; provides tamper-resistant, write-once program storage. Use Value: Dual-voltage support allows same design to operate in both 3.3V and 5V backplane environments; industrial temp rating ensures reliability in cabinet-mounted enclosures. |
| Avionics Data Logger | Legacy Industrial Instrumentation |
Use Scenario: Flight data recorder capturing sensor telemetry with guaranteed nonvolatile retention across vibration, thermal cycling, and power loss. IC Role / Device Role / Timing Role: Read-only memory storing flight software and fault-handling routines; accessed via 16-bit bus of radiation-tolerant processor. Use Value: 200mA latchup immunity and −40°C to +85°C operation ensure functional integrity in avionics bays; OTP architecture prevents accidental corruption. | Use Scenario: Retrofit upgrade of aging test equipment where original EPROMs are obsolete but socket and timing constraints remain fixed. IC Role / Device Role / Timing Role: Pin- and function-compatible replacement for AT27C1024 in legacy 5V systems; retains identical address/data mapping and CE/OE timing. Use Value: JEDEC PLCC pinout and 90ns tACC match original timing budgets; eliminates PCB redesign while adding low-voltage capability for future hybrid upgrades. |
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 operation (4.5V–5.5V); no 2.7V–3.6V mode; identical 90ns tACC, 64K×16 OTP structure, and PLCC-44 package | Requires regulated 5V supply; unsuitable for battery-backed or mixed-voltage systems | Select when legacy 5V-only design mandates exact voltage compliance and no low-voltage extension is needed |
| MX27C1024PC-90 | 5V-only, 90ns access, PLCC-44; lacks integrated product ID code and rapid programming algorithm; lower ESD rating (1.5kV) | No auto-ID support increases programming setup complexity; no 100µs/word programming guarantee | Choose for cost-sensitive 5V applications where programming throughput and ID automation are not critical |
Compared with AT27C1024-90JU and MX27C1024PC-90, the AT27BV1024-90JU uniquely supports dual-supply operation and rapid programming with built-in ID - making it the only option for new portable or upgrade designs requiring battery compatibility and production efficiency.
Availability
AT27BV1024-90JU is available at Aetrix Electronics and suitable for handheld medical devices, industrial PLCs, avionics data loggers, and legacy instrumentation upgrades requiring stable component supply and long-term obsolescence management.
Supply support for AT27BV1024-90JU 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 U.S.-based semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.
The AT27BV1024-90JU belongs to Atmel's low-voltage OTP EPROM product line, engineered specifically for portable and mixed-supply embedded systems needing reliable, low-power, pin-compatible memory upgrades to legacy 5V EPROMs.
FAQ
What is the maximum operating voltage for AT27BV1024-90JU during normal read operation?
The AT27BV1024-90JU supports two read voltage ranges: 2.7V to 3.6V for unregulated battery operation, and 4.5V to 5.5V (5V ±10%) for standard 5V systems. It does not operate at voltages outside these ranges during read mode. During programming, VCC must be set to 6.5V ±0.25V and VPP to 13.0V ±0.25V - these are strictly programming-only conditions and not for read operation. The AT27BV1024-90JU datasheet specifies absolute maximum ratings of −2.0V to +7.0V on any pin, but functional operation is limited to the defined supply ranges.
Is AT27BV1024-90JU pin-compatible with AT27C1024-90JU?
Yes, the AT27BV1024-90JU is explicitly designed to be pin-compatible with the JEDEC-standard AT27C1024, sharing identical 44-lead PLCC (44J) pinout, signal names, and control logic (CE/OE/PGM). This allows direct socket replacement in existing 5V designs. However, the AT27BV1024-90JU adds dual-voltage capability and rapid programming - features not present in the AT27C1024-90JU. The AT27BV1024-90JU maintains full functional equivalence in 5V mode while extending operational flexibility.
Does AT27BV1024-90JU support in-system programming?
No, the AT27BV1024-90JU does not support in-system programming (ISP). It is a one-time programmable (OTP) EPROM requiring external parallel programming equipment with precise VPP = 13.0V and VCC = 6.5V sequencing. Programming must occur before soldering or in a dedicated socketed programmer; the device lacks internal charge pumps or ISP command interfaces. Once programmed, contents are permanent and cannot be erased or rewritten. The AT27BV1024-90JU is intended for firmware/image storage where field updates are unnecessary.
What decoupling capacitance is required for stable operation of AT27BV1024-90JU?
The AT27BV1024-90JU requires a minimum 0.1µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close as possible to the device's pins. For systems with multiple EPROMs or noisy power rails, a 4.7µF bulk electrolytic capacitor should also be added near the power entry point. These values are specified in the AT27BV1024-90JU datasheet to suppress transient voltage excursions caused by CE/OE switching - failure to implement them may result in non-conformance or data corruption. The AT27BV1024-90JU's sensitivity to supply noise is documented in Section 3 ("System considerations").
How does the integrated product identification code work in AT27BV1024-90JU?
The AT27BV1024-90JU includes a manufacturer ID (001Eh) and device code (00F1h) accessible via special read mode: A9 is driven to VH (11.5–12.5V), A0 is toggled low/high to select ID word, and all other address lines held low. This electronic ID enables industry-standard programmers to auto-detect the AT27BV1024-90JU and apply correct algorithms/voltages. The AT27BV1024-90JU shares the same ID codes as AT27C1024, confirming programming compatibility. No external circuitry is needed - the feature is fully integrated and activated by specific address/control conditions.
AT27BV1024-90JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for AT27BV1024-90JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV1024-90JU 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 reliable?
The price and inventory of AT27BV1024-90JU 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 is usually 5 days.
3.What payment methods are accepted for AT27BV1024-90JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV1024-90JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV1024-90JU?
AT27BV1024-90JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV1024-90JU 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?
For technical support, including AT27BV1024-90JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV1024-90JU requirements.
6.How does Aetrix verify that AT27BV1024-90JU is sourced from the original manufacturer or authorized distributors?
All AT27BV1024-90JU 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 meets industry standards.
7.What is the process for return or replacement of AT27BV1024-90JU?
All AT27BV1024-90JU units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV1024-90JU, 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 part is unused and in its original packaging.
Return procedure for AT27BV1024-90JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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