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Microchip Technology AT27BV512-70TU
- Part No.:
- AT27BV512-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT27BV512-70TU.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,771
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Product details
Overview
AT27BV512-70TU from Atmel is a 64K × 8-bit one-time programmable EPROM (OTP EPROM) optimized for low-voltage battery-powered systems, featuring 70 ns read access time, dual-supply operation (2.7–3.6 V or 4.5–5.5 V), and industrial temperature range (−40°C to +85°C). It delivers TTL-compatible outputs at 3.0 V and supports rapid programming at 100 µs/byte.
For engineers reviewing the AT27BV512-70TU datasheet, AT27BV512-70TU pinout, AT27BV512-70TU application, or AT27BV512-70TU equivalent, key selection criteria include unregulated battery compatibility, JEDEC-standard PLCC/SOIC/TSOP packaging, CMOS/TTL I/O compatibility, standby current <1 µA at 3V, and pin-for-pin equivalence with AT27C512R.
Technical Context
The AT27BV512-70TU implements a two-line control architecture (CE and OE/VPP) enabling bus contention prevention in shared-memory systems. Its dual-voltage design allows seamless operation across 3V and 5V host environments without level-shifting circuitry.
It uses high-reliability CMOS technology with 2,000V ESD protection and 200 mA latchup immunity. Programming employs a verified rapid algorithm requiring only 100 µs per byte at VCC = 6.5 V and OE/VPP = 13.0 V, with full verification loop support and integrated product identification code (0x1E/0x0D).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288-bit (64K × 8) OTP EPROM - fixed, non-erasable storage ideal for firmware boot code or configuration data. |
| Read Access Time | 70 ns max - enables direct CPU interface at up to ~14 MHz system clock without wait states. |
| Supply Voltage Range | 2.7 V to 3.6 V or 4.5 V to 5.5 V - supports unregulated battery rails and legacy 5V systems without external regulators. |
| Standby Current | 20 µA max (CMOS mode), <1 µA typical at 3V - extends battery life in portable or always-on embedded devices. |
| Active Power @ 5 MHz | 29 mW max at VCC = 3.6 V - reduces thermal load and PCB power delivery complexity vs. standard 5V EPROMs. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade environmental resilience without derating. |
| ESD/Latchup | 2,000 V HBM ESD protection; 200 mA latchup immunity - ensures robustness in handling and board-level stress. |
Pinout & Package
AT27BV512-70TU is supplied in a 28-lead TSOP (Type 1, 8 × 13.4 mm) package compliant with JEDEC MO-183, Pb/halide-free, with gull-wing leads and pin 1 identifier marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K memory space; driven by microcontroller or ASIC address lines. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus (output-only during read); TTL-compatible at 3.0 V, LVBO-compliant at 2.7 V. |
| CE | Chip Enable | Active-low chip select; controls device activation and entry into standby mode when high. |
| OE/VPP | Output Enable / Program Supply | Dual-function pin: low enables output drivers during read; high (13.0 V) enables programming mode. |
| VCC | Power Supply | Primary supply input (2.7–3.6 V or 4.5–5.5 V); requires 0.1 µF ceramic decoupling capacitor near pin. |
| GND | Ground Reference | Signal and power return path; must be connected to system ground plane with low-inductance layout. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid Programming Algorithm | 100 µs/byte typical - cuts programming time by >90% vs. conventional EPROMs, accelerating production firmware loading. |
| Integrated Product ID Code | Manufacturer ID 0x1E, Device ID 0x0D - enables automatic algorithm selection in industry-standard programmers, eliminating manual setup errors. |
| Two-Line Control Architecture | Separate CE and OE/VPP pins - prevents bus contention during multi-device memory mapping and simplifies timing-critical read cycles. |
| Unregulated Battery Operation | Functional down to 2.7 V with no regulation required - eliminates DC/DC converter or LDO in portable designs, reducing BOM cost and footprint. |
| Green Packaging Option | Pb/halide-free TSOP - meets RoHS compliance requirements without performance trade-offs or requalification effort. |
Applications
| Portable Medical Monitor | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Standalone handheld vital-sign monitor powered by two AA alkaline cells (2.4–3.2 V nominal, unregulated). IC Role / Device Role / Timing Role: Boot ROM storing MCU initialization code and calibration tables; accessed at power-up before regulator stabilization. Use Value: Eliminates need for voltage regulator due to 2.7 V minimum operating voltage, extending battery runtime by 35% versus 5V EPROM-based designs. | Use Scenario: Fixed-function controller in factory-floor automation system requiring field-upgradable firmware stored in nonvolatile memory. IC Role / Device Role / Timing Role: Read-only firmware image storage; mapped to CPU address space with CE controlled by FPGA decoder logic. Use Value: 70 ns access time enables zero-wait-state execution from flash-like memory, improving deterministic response in real-time control loops. |
| Legacy Industrial Card Interface | Automotive Diagnostic Tool |
Use Scenario: ISA-bus expansion card for test equipment that must operate in both 3.3 V and 5 V PC chassis slots. IC Role / Device Role / Timing Role: Dual-voltage compatible firmware storage; OE/VPP pin toggled between 3.3 V and 5 V logic levels via level translator. Use Value: Single BOM part replaces two variants (3V and 5V), cutting inventory SKUs and qualification overhead by 50%. | Use Scenario: Handheld OBD-II scanner powered by rechargeable Li-ion (3.0–4.2 V) with USB-hosted firmware updates. IC Role / Device Role / Timing Role: Secure boot image storage; programmed once at factory using standard EPROM programmer with 13 V VPP. Use Value: Integrated product ID code ensures correct programming algorithm selection, preventing field failures from mismatched voltage profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C512R-70PU | 5V-only operation (4.5–5.5 V); no 2.7–3.6 V support; same 70 ns speed and 64K×8 organization. | Requires regulated 5V supply; incompatible with battery-powered systems below 4.5 V. | Select only if system operates exclusively at 5V and legacy 5V programming infrastructure is already deployed. |
| M27C512-70F1 | STMicroelectronics 5V OTP EPROM; 70 ns access; 28-pin SOIC; no dual-voltage capability or integrated ID code. | Lacks rapid programming algorithm and product ID; requires manual algorithm selection in programmers. | Consider for cost-sensitive 5V-only applications where programming throughput and auto-detection are not critical. |
Compared with AT27C512R-70PU and M27C512-70F1, the AT27BV512-70TU uniquely supports unregulated battery rails and embeds programmable identification-enabling single-part deployment across 3V/5V platforms while reducing programming setup time and failure risk.
Availability
AT27BV512-70TU is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLCs, legacy expansion cards, and automotive diagnostic tools requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT27BV512-70TU 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 AT27BV512 product line was designed specifically for low-power, battery-operated embedded systems requiring reliable, pin-compatible OTP memory with dual-voltage flexibility and rapid field programming capability.
FAQ
What is the maximum operating voltage for AT27BV512-70TU during normal read operation?
The AT27BV512-70TU supports two distinct read voltage ranges: 2.7 V to 3.6 V for low-voltage battery systems, and 4.5 V to 5.5 V for standard 5V operation. It must not be operated outside these ranges during read mode; programming requires separate VCC = 6.5 V and OE/VPP = 13.0 V conditions. Exceeding 3.6 V in low-voltage mode risks parametric nonconformance.
Does AT27BV512-70TU require an external voltage regulator when used with alkaline batteries?
No, the AT27BV512-70TU does not require an external voltage regulator when used with alkaline batteries. Its 2.7 V to 3.6 V unregulated supply range accommodates the full discharge curve of two AA or AAA cells (1.5 V nominal, down to ~1.2 V per cell), allowing direct connection to the battery stack. This eliminates regulator BOM cost and efficiency loss.
Is AT27BV512-70TU pin-compatible with AT27C512R, and what does that mean for PCB design?
Yes, AT27BV512-70TU is pin-compatible with JEDEC-standard AT27C512R in identical packages (PLCC, SOIC, TSOP). That means the same PCB footprint, trace routing, and solder mask can be used for both parts. However, AT27BV512-70TU adds dual-voltage support and rapid programming-no layout changes are needed to migrate from AT27C512R to AT27BV512-70TU.
What programming equipment is required to program AT27BV512-70TU?
AT27BV512-70TU uses the same programming equipment as AT27C512R, including industry-standard EPROM programmers (e.g., BP Microsystems, Xeltek, Data I/O). Its integrated product ID code (0x1E/0x0D) enables automatic algorithm selection. Programming requires VCC = 6.5 V and OE/VPP = 13.0 V, with 100 µs CE pulses and verification loops-no special hardware beyond standard 5V/12V-capable programmers.
What is the purpose of the OE/VPP pin on AT27BV512-70TU, and how is it used in different modes?
The OE/VPP pin on AT27BV512-70TU serves dual functions: as Output Enable (low) during read mode, and as Program Supply (high at 13.0 V) during programming. In read mode, pulling OE/VPP low activates data outputs; in programming mode, applying 13.0 V enables internal high-voltage circuits. The pin is never driven to intermediate voltages-it is strictly binary: VIL (~0 V) or VIH (~13 V)-and must be isolated from 3.3V/5V logic during programming.
AT27BV512-70TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 70 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:
- 28-TSOP
AT27BV512-70TU FAQ
1.How can I place an order for AT27BV512-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV512-70TU 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 AT27BV512-70TU reliable?
The price and inventory of AT27BV512-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV512-70TU is usually 5 days.
3.What payment methods are accepted for AT27BV512-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV512-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV512-70TU?
AT27BV512-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV512-70TU 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 AT27BV512-70TU?
For technical support, including AT27BV512-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV512-70TU requirements.
6.How does Aetrix verify that AT27BV512-70TU is sourced from the original manufacturer or authorized distributors?
All AT27BV512-70TU 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 AT27BV512-70TU meets industry standards.
7.What is the process for return or replacement of AT27BV512-70TU?
All AT27BV512-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV512-70TU, 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 AT27BV512-70TU part is unused and in its original packaging.
Return procedure for AT27BV512-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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