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Microchip Technology AT27BV1024-90VC
- Part No.:
- AT27BV1024-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27BV1024-90VC.pdf
- Description:
- IC EPROM 1MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,145
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Product details
Overview
AT27BV1024-90VC from Atmel is a 1-Mbit (64K × 16) one-time programmable EPROM with 90 ns read access time, dual-voltage operation (2.7–3.6 V or 4.5–5.5 V), and JEDEC-standard 40-pin VSOP package. It serves as nonvolatile program storage in battery-powered 16/32-bit microprocessor systems, delivering TTL-compatible outputs at 3.0 V and LVBO compliance at 2.7 V.
For engineers reviewing the AT27BV1024-90VC datasheet, AT27BV1024-90VC pinout, AT27BV1024-90VC application, or AT27BV1024-90VC equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in portable embedded systems, and two confirmed alternative OTP EPROMs with documented functional and packaging differences.
Technical Context
The AT27BV1024-90VC implements a CMOS-based OTP memory array with two-line control (CE/OE), enabling bus contention avoidance in shared-data-bus architectures. Its Rapid™ programming algorithm uses 100 µs/word pulses at VCC = 6.5 V and VPP = 13.0 V, with built-in verification loops per address.
It supports product identification via A9 high-voltage (12.0 V ± 0.5 V) and A0 toggling to select manufacturer ID (001Eh) or device code (00F1h). Input/output levels are JEDEC-compliant for both LVTTL and LVBO interfaces, and it features integrated 2,000 V ESD protection and 200 mA latchup immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1,048,576-bit (64K × 16) OTP EPROM - supports 16-bit data bus interface without external multiplexing |
| Read Access Time | 90 ns max at VCC = 2.7–3.6 V - enables direct connection to 10 MHz microprocessor address/data buses |
| Supply Voltage Range | 2.7–3.6 V or 4.5–5.5 V - eliminates need for voltage regulation in battery-powered designs |
| Standby Current | 20 µA max at VCC = 3.6 V - extends battery life in always-on portable systems |
| Active Power Dissipation | 36 mW max at 5 MHz and VCC = 3.6 V - reduces thermal load in dense PCB layouts |
| Programming Speed | 100 µs/word typical - cuts firmware update time vs. legacy 5V EPROMs by >5× |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
AT27BV1024-90VC is housed in a 40-lead plastic thin small outline package (VSOP), 10 mm × 14 mm, JEDEC MO-142 CA compliant. Both GND pins (pins 21 and 40) must be connected; pin 1 is marked by notch and dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface - selects one of 64K words; all inputs CMOS/TTL compatible |
| O0–O15 | Data Outputs | 16-bit bidirectional data path - drives TTL loads at 3.0 V; high-impedance when OE or CE inactive |
| CE | Chip Enable | Active-low chip select - enables memory access only when low; controls standby mode entry |
| OE | Output Enable | Active-low output gate - allows output float without disabling chip; prevents bus contention |
| PGM | Program Strobe | Active-low programming trigger - initiates 100 µs pulse write cycle under VPP = 13.0 V |
| VCC | Power Supply | Main supply pin - accepts 2.7–3.6 V or 4.5–5.5 V; requires 0.1 µF ceramic decoupling |
| VPP | Programming Voltage | High-voltage input - 13.0 V ± 0.25 V during programming; must ramp with VCC |
| GND (21, 40) | Ground | Return path for VCC and VPP - both pins must be connected to system ground plane |
| NC (pin 8) | No Connect | Internally unconnected - must remain floating; no pull-up/down required |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage read operation | Operates natively at 2.7–3.6 V or 4.5–5.5 V - removes external regulator in mixed-supply systems |
| Rapid™ programming algorithm | 100 µs/word typical - reduces production programming time and improves yield in high-volume firmware loading |
| Integrated product ID code | Manufacturer ID 001Eh and Device Code 00F1h - enables automatic algorithm selection in industry-standard programmers |
| JEDEC pin compatibility | Pin-for-pin compatible with AT27C1024 - allows drop-in replacement in existing 5V designs with minimal validation |
| LVBO and LVTTL interface support | Meets JEDEC LVBO spec at 2.7 V and LVTTL at 3.0 V - ensures interoperability with mixed-voltage logic families |
Applications
| Handheld Medical Instrumentation | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Battery-powered glucose meters and portable ECG monitors requiring tamper-resistant, field-programmable firmware storage. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code and calibration tables; accessed at ≤10 MHz during power-up and diagnostics. Use Value: 20 µA standby current extends single-cell CR2032 battery life beyond 5 years; 90 ns access enables real-time sensor data processing. |
Use Scenario: Fixed-function logic controllers in factory automation where firmware must survive vibration, temperature cycling, and long-term storage. IC Role / Device Role / Timing Role: OTP storage for ladder logic interpreter and I/O configuration; read-only during runtime with infrequent reprogramming. Use Value: 2,000 V ESD protection and -40°C to +85°C rating ensure reliability in electrically noisy plant-floor environments. |
| Legacy Embedded System Upgrade | Modular Communication Card |
Use Scenario: Retrofitting 5V industrial boards with low-power capability while retaining PCB layout and firmware binaries. IC Role / Device Role / Timing Role: Pin-compatible replacement for AT27C1024; operates at 3.3 V with identical timing and address mapping. Use Value: Eliminates need for level shifters or regulator redesign; same programming equipment and algorithms reduce qualification effort. |
Use Scenario: Hot-pluggable communication modules (e.g., RS-485/CAN add-on cards) requiring secure, unalterable boot code. IC Role / Device Role / Timing Role: Boot ROM storing initialization routines and hardware abstraction layer; accessed before FPGA or MCU configuration. Use Value: Integrated product ID prevents firmware mismatch across module variants; VSOP package saves board space in compact card-edge designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C1024-90JC | 5V-only operation (4.5–5.5 V); PLCC-44 package; no low-voltage mode | Requires regulated 5V supply; not suitable for battery systems below 4.5 V | Select when legacy 5V infrastructure exists and power efficiency is secondary |
| MX27C1024PC-12 | 120 ns access time; 5V-only; DIP-40 package; no Rapid™ programming | Slower read performance; incompatible with rapid programming workflows; through-hole mounting only | Select for cost-sensitive, low-volume prototyping where speed and surface-mount are not critical |
Compared with AT27C1024-90JC and MX27C1024PC-12, the AT27BV1024-90VC uniquely supports unregulated battery operation down to 2.7 V while maintaining 90 ns access and rapid programming - making it the only choice for portable, low-power, high-reliability OTP storage where voltage headroom and programming throughput matter.
Availability
AT27BV1024-90VC is available at Aetrix Electronics and suitable for handheld medical devices, industrial PLCs, legacy system upgrades, and modular communication cards requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.
Supply support for AT27BV1024-90VC 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 AT27BV1024-90VC belongs to Atmel's Battery-Voltage™ OTP EPROM family, designed specifically to replace 5V EPROMs in portable and battery-operated systems without sacrificing speed or compatibility.
FAQ
What is the maximum operating voltage for AT27BV1024-90VC during normal read operation?
The AT27BV1024-90VC supports two distinct read supply ranges: 2.7 V to 3.6 V for low-voltage battery operation and 4.5 V to 5.5 V for standard 5 V systems. Operation outside these ranges - including 3.7–4.4 V - is not specified and may result in unreliable read behavior or increased standby current. The AT27BV1024-90VC does not support intermediate voltages.
Can AT27BV1024-90VC be programmed using standard EPROM programmers?
Yes, the AT27BV1024-90VC is fully programming-compatible with industry-standard EPROM programmers that support the AT27C1024, provided they deliver VPP = 13.0 V ± 0.25 V and VCC = 6.5 V ± 0.25 V during programming. Its integrated product ID (001Eh/00F1h) ensures automatic algorithm selection. The AT27BV1024-90VC uses the same programming sequence and timing as the AT27C1024.
Does AT27BV1024-90VC require external decoupling capacitors?
Yes, the AT27BV1024-90VC requires a 0.1 µF ceramic capacitor between VCC and GND, placed as close as possible to pins 20 and 21. For systems with multiple AT27BV1024-90VC devices, a 4.7 µF bulk electrolytic capacitor should also be added near the power entry point. These capacitors suppress transient voltage excursions during CE transitions and ensure stable read operation.
Is AT27BV1024-90VC pin-compatible with AT27C1024 in the same VSOP package?
No - while the AT27BV1024-90VC is pin-compatible with the AT27C1024 in function and signal assignment, the AT27C1024 was not offered in VSOP (40V) packaging. The AT27C1024-90JC uses PLCC-44 (44J), whereas the AT27BV1024-90VC uses VSOP-40 (40V). Pin compatibility applies only to signal mapping, not physical package interchangeability.
What is the purpose of the PGM pin on AT27BV1024-90VC?
The PGM pin on the AT27BV1024-90VC is an active-low programming strobe that initiates the 100 µs word programming pulse when driven low under valid VPP and VCC conditions. It is not used during read operations. The AT27BV1024-90VC relies on precise timing of PGM relative to address and data setup/hold windows defined in its AC programming characteristics table.
AT27BV1024-90VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- 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:
- 90 ns
- Voltage - Supply:
- 2.7V ~ 3.6V, 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT27BV1024-90VC FAQ
1.How can I place an order for AT27BV1024-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV1024-90VC 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 AT27BV1024-90VC reliable?
The price and inventory of AT27BV1024-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV1024-90VC is usually 5 days.
3.What payment methods are accepted for AT27BV1024-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV1024-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV1024-90VC?
AT27BV1024-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV1024-90VC 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 AT27BV1024-90VC?
For technical support, including AT27BV1024-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV1024-90VC requirements.
6.How does Aetrix verify that AT27BV1024-90VC is sourced from the original manufacturer or authorized distributors?
All AT27BV1024-90VC 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 AT27BV1024-90VC meets industry standards.
7.What is the process for return or replacement of AT27BV1024-90VC?
All AT27BV1024-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV1024-90VC, 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 AT27BV1024-90VC part is unused and in its original packaging.
Return procedure for AT27BV1024-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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