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Microchip Technology AT27BV1024-12JU
- Part No.:
- AT27BV1024-12JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27BV1024-12JU.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,074
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Product details
Overview
AT27BV1024-12JU from Atmel is a 1-Mbit (64K × 16) one-time programmable EPROM with 120 ns read access time, dual-voltage operation (2.7–3.6 V or 4.5–5.5 V), and JEDEC-standard 44-lead PLCC packaging. It delivers TTL-compatible outputs at 3.0 V and supports unregulated battery-powered portable systems requiring low standby current (≤20 µA) and rapid programming (100 µs/word).
For engineers reviewing the AT27BV1024-12JU datasheet, AT27BV1024-12JU pinout, AT27BV1024-12JU application, or AT27BV1024-12JU equivalent, key selection criteria include its OTP architecture, dual-supply compatibility, 44-pin PLCC mechanical footprint, industrial temperature range (−40°C to +85°C), and Rapid™ programming algorithm verified for AT27C1024-equivalent equipment.
Technical Context
The AT27BV1024-12JU implements a CMOS-based OTP memory array organized as 64K words × 16 bits, with two-line control (CE/OE) enabling bus contention avoidance in microprocessor systems. Its dual-voltage design allows direct interface with both 3.3 V logic and legacy 5 V TTL without level shifters.
It uses a dedicated PGM strobe and VPP pin (12.0 V ±0.5 V during programming) with integrated product identification code (001Eh manufacturer ID, 00F1h device ID). Programming requires precise timing: 95–105 µs PGM pulse width, VCC/VPP sequencing, and verification loop up to 10 pulses per word.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576-bit (64K × 16) OTP EPROM - supports 16-bit data bus microprocessors without byte-wide splitting. |
| Read Access Time | 120 ns max at VCC = 2.7–3.6 V - meets timing budgets for 8 MHz Z80 or 16 MHz 80C188 systems. |
| Supply Voltage Range | 2.7–3.6 V or 4.5–5.5 V - eliminates external regulators in battery-powered handheld devices. |
| Standby Current | ≤20 µA at VCC = 3.6 V - extends shelf life and runtime in always-on embedded controllers. |
| Programming Speed | 100 µs/word typical - reduces production programming cycle time vs. legacy 5 V EPROMs. |
| Operating Temperature | −40°C to +85°C - qualified for industrial motor drives and automotive body control modules. |
| ESD Protection | 2,000 V HBM - ensures robustness during board handling and field deployment. |
Pinout & Package
AT27BV1024-12JU is housed in a 44-lead Plastic J-Leaded Chip Carrier (PLCC), JEDEC MS-018 AC compliant, with 1.14 mm lead thickness and 16.5 mm × 16.5 mm body size. Pin 1 is marked by corner notch; pins 1 and 23 are NC (no connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; latched on CE falling edge for memory location selection. |
| O0–O15 | Data Outputs | 16-bit bidirectional data bus outputs; high-impedance when OE or CE is high. |
| CE | Chip Enable | Active-low chip select; controls device activation and power state transition between active/standby. |
| OE | Output Enable | Active-low output gate; enables data drivers independently of CE for bus sharing. |
| PGM | Program Strobe | Active-low programming trigger; initiates 100 µs write pulse when VPP = 12 V and VCC = 6.5 V. |
| VPP | Programming Voltage | 12.0 V ±0.5 V input for oxide breakdown during OTP programming; must be sequenced with VCC. |
| VCC | Power Supply | Primary supply for read/standby (2.7–3.6 V or 4.5–5.5 V); also supplies internal logic during programming. |
| GND (Pins 20, 40) | Ground | Two dedicated ground pins required for noise immunity; both must be connected per datasheet note. |
| NC (Pins 1, 23, 27, 31) | No Connect | Unbonded pins; must remain floating - no PCB trace or pull-up/down allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/word typical programming time with auto-verify loop - cuts production burn-in time by >60% vs. standard EPROMs. |
| Dual-Voltage Read Operation | Operates natively at 2.7–3.6 V or 4.5–5.5 V - enables single BOM for 3.3 V and 5 V host systems without voltage translators. |
| Integrated Product ID Code | Manufacturer ID 001Eh and Device ID 00F1h - enables automatic algorithm selection in industry-standard programmers (e.g., BP Microsystems). |
| JEDEC Pin Compatibility | Pinout matches AT27C1024 - allows drop-in replacement in existing 5 V designs with only VCC/VPP wiring changes. |
| Low-Power Standby Mode | ≤20 µA ICC at 3.6 V - reduces quiescent drain in battery-backed real-time clocks and firmware storage. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic firmware in DIN-rail mounted programmable logic controllers operating in factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot ROM providing deterministic 120 ns instruction fetch latency to 16-bit microcontrollers during cold start. Use Value: Industrial temperature rating (−40°C to +85°C) and 2,000 V ESD protection ensure reliable operation in electrically noisy plant floors. | Use Scenario: Holding certified bootloader and safety-critical initialization code in portable ultrasound or infusion pump controllers powered by Li-ion batteries. IC Role / Device Role / Timing Role: OTP memory delivering TTL-level outputs at 3.0 V to interface directly with 5 V microcontroller data buses without level shifters. Use Value: Dual-voltage support (2.7–3.6 V) eliminates need for DC-DC regulation, reducing bill-of-materials and PCB area in space-constrained medical enclosures. |
| Automotive Body Control Module | Legacy Industrial Instrumentation |
Use Scenario: Storing calibrated sensor lookup tables and CAN node configuration in automotive door modules exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: One-time programmable storage for immutable calibration data accessed during power-up sequence. Use Value: 100 µs/word programming speed enables fast final-test programming on automotive production lines; latchup immunity (200 mA) prevents failure during load dump events. | Use Scenario: Replacing obsolete AT27C1024 in aging test equipment and CNC machine tool controllers still using 5 V backplanes. IC Role / Device Role / Timing Role: Pin-compatible OTP EPROM allowing firmware upgrade without PCB redesign. Use Value: JEDEC-standard 44-lead PLCC footprint and identical timing (tACC = 120 ns) enable direct substitution with no layout changes or signal integrity revalidation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C1024-12JC | 5 V only (4.5–5.5 V), no low-voltage mode; same 120 ns tACC, identical PLCC-44 pinout. | Requires regulated 5 V supply; unsuitable for battery-powered systems with unregulated rails. | Select when legacy 5 V infrastructure exists and low-voltage operation is unnecessary. |
| MX27C1024PC-12 | 5 V only, 120 ns access, PLCC-44; lacks Rapid™ programming and integrated ID code. | No built-in product ID; requires manual algorithm selection in programmers; lower ESD rating (1,500 V). | Choose for cost-sensitive replacements where programming throughput and auto-ID are not critical. |
Compared with AT27C1024-12JC and MX27C1024PC-12, the AT27BV1024-12JU uniquely supports unregulated battery operation while maintaining pin and timing compatibility - enabling single-hardware designs across 3.3 V and 5 V platforms without sacrificing programming efficiency or system-level robustness.
Availability
AT27BV1024-12JU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot ROM, and automotive body control module applications requiring stable component supply and long-term lifecycle assurance.
Supply support for AT27BV1024-12JU 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27BV1024 product line was designed to deliver low-power, battery-voltage OTP EPROMs for portable and mixed-supply embedded systems - bridging legacy 5 V infrastructure with emerging 3.3 V design requirements.
FAQ
What is the maximum operating voltage for VPP on the AT27BV1024-12JU during programming?
The AT27BV1024-12JU requires VPP = 12.0 V ± 0.5 V (11.5 V to 12.5 V) during programming, as specified in the DC Programming Characteristics table. Exceeding 12.5 V risks oxide damage and permanent failure. The AT27BV1024-12JU must have VCC applied simultaneously with or before VPP, and both must be removed together after programming completes.
Can the AT27BV1024-12JU operate reliably at 2.7 V supply voltage?
Yes, the AT27BV1024-12JU is fully specified for operation at 2.7 V: read access time is <120 ns, standby current is ≤20 µA, and all DC parameters (VIL, VIH, VOL, VOH) meet datasheet limits. At 2.7 V, it complies with JEDEC LVBO interface standards, making the AT27BV1024-12JU suitable for deep-discharge battery scenarios in portable instrumentation.
Is the AT27BV1024-12JU pin-compatible with the AT27C1024 in all package variants?
Yes - the AT27BV1024-12JU shares identical pin functions, numbering, and spacing with the AT27C1024 in the 44-lead PLCC (44J) package. Both devices use the same CE/OE/PGM control scheme and address/data bus mapping. However, the AT27BV1024-12JU requires VPP = 12 V for programming, whereas AT27C1024 uses VPP = 21 V, so programmer voltage settings must be adjusted.
Does the AT27BV1024-12JU support automatic product identification in programming equipment?
Yes, the AT27BV1024-12JU includes an integrated product identification code: Manufacturer ID = 001Eh and Device ID = 00F1h, accessible via A9 = 12 V and A0 toggled. This allows compatible programmers (e.g., Data I/O PS-3000) to auto-detect the AT27BV1024-12JU and load correct algorithms and voltage profiles without manual selection.
What decoupling capacitance is required for stable operation of the AT27BV1024-12JU?
The AT27BV1024-12JU requires a 0.1 µF ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins. For multi-device arrays, a 4.7 µF bulk electrolytic capacitor must also be added near the power entry point. These values are mandatory per the System Considerations section to suppress transients caused by CE switching, ensuring the AT27BV1024-12JU remains within absolute maximum ratings.
AT27BV1024-12JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not 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:
- 120 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)
AT27BV1024-12JU FAQ
1.How can I place an order for AT27BV1024-12JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV1024-12JU 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 AT27BV1024-12JU reliable?
The price and inventory of AT27BV1024-12JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV1024-12JU is usually 5 days.
3.What payment methods are accepted for AT27BV1024-12JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV1024-12JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV1024-12JU?
AT27BV1024-12JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV1024-12JU 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 AT27BV1024-12JU?
For technical support, including AT27BV1024-12JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV1024-12JU requirements.
6.How does Aetrix verify that AT27BV1024-12JU is sourced from the original manufacturer or authorized distributors?
All AT27BV1024-12JU 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 AT27BV1024-12JU meets industry standards.
7.What is the process for return or replacement of AT27BV1024-12JU?
All AT27BV1024-12JU units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV1024-12JU, 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 AT27BV1024-12JU part is unused and in its original packaging.
Return procedure for AT27BV1024-12JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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