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Microchip Technology AT27BV040-12TC
- Part No.:
- AT27BV040-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT27BV040-12TC.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,312
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Product details
Overview
AT27BV040-12TC from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM optimized for low-voltage battery-powered systems, featuring 120 ns read access time, dual-supply operation (2.7–3.6 V or 4.5–5.5 V), and JEDEC-standard 32-lead TSOP packaging. It delivers TTL-compatible outputs at 3.0 V and supports rapid programming at 100 µs/byte.
For engineers reviewing the AT27BV040-12TC datasheet, AT27BV040-12TC pinout, AT27BV040-12TC application, or AT27BV040-12TC equivalent, key selection criteria include unregulated battery voltage support (2.7–3.6 V), 120 ns access timing, industrial temperature range (–40°C to +85°C), and compatibility with standard AT27C040 programming infrastructure.
Technical Context
The AT27BV040-12TC implements a CMOS-based OTP memory architecture with two-line control (CE/OE), enabling bus contention avoidance in embedded microcontroller systems. Its dual-voltage design allows direct interface with both 3.3 V logic and legacy 5 V hosts without level-shifting.
It uses Atmel's Rapid™ Programming Algorithm requiring VCC = 6.5 V and VPP = 13.0 V during programming, while supporting product identification via A9/VH and A0 toggling to read manufacturer (0x1E) and device code (0x0B) bytes - identical to AT27C040 for tooling compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304-bit (512K × 8) OTP EPROM - fixed content storage for firmware boot code or configuration data |
| Read Access Time | 120 ns max at VCC = 2.7–3.6 V or 4.5–5.5 V - enables real-time execution from memory in 8/16-bit MCU systems |
| Supply Voltage Range | 2.7–3.6 V (unregulated battery) or 4.5–5.5 V (standard 5 V) - eliminates need for LDO regulation in portable designs |
| Standby Current | 20 µA max at VCC = 3.6 V (CMOS mode) - extends battery life in always-on or sleep-mode applications |
| Active Power Dissipation | 36 mW max at 5 MHz, VCC = 3.6 V - reduces thermal load in dense PCB layouts |
| Programming Speed | 100 µs/byte typical using Rapid™ algorithm - cuts production programming time vs. conventional EPROMs |
| ESD/Latchup Rating | 2,000 V HBM ESD protection; 200 mA latchup immunity - ensures robustness in manufacturing and field environments |
Pinout & Package
AT27BV040-12TC is supplied in a 32-lead Thin Small Outline Package (TSOP, 8 × 20 mm, JEDEC MO-142 BA), pin-compatible with industry-standard 32-pin EPROM footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A0–A18 must be stable before CE/OE assertion |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus (output only); high-impedance when OE or CE inactive |
| 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 drive onto bus without affecting internal memory access timing |
| VCC | Power Supply | Primary supply for logic and I/O; accepts 2.7–3.6 V (battery) or 4.5–5.5 V (5 V system) |
| VPP | Programming Voltage | 13.0 V programming supply; must be applied simultaneously with or after VCC and removed simultaneously or before VCC |
| GND | Ground Reference | Signal and power return; requires local 0.1 µF ceramic decoupling per device |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Read Operation | Operates natively at 2.7–3.6 V (battery) or 4.5–5.5 V (5 V) without external regulators - simplifies power architecture |
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop - improves production throughput and yield |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x0B) readable via A9/A0 control - enables automatic programmer recognition |
| JEDEC-Compatible Packaging | 32-lead TSOP (8 × 20 mm) footprint matches AT27C040 - allows drop-in replacement in existing designs |
| Low-Power Standby Mode | 20 µA max ICC standby current at 3.6 V - supports multi-year battery life in maintenance-free IoT endpoints |
Applications
| Industrial PLC Firmware Storage | Portable Medical Device Boot ROM |
|---|---|
Use Scenario: Storing immutable firmware for programmable logic controllers operating in harsh factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 120 ns instruction fetch timing to microcontroller on power-up. Use Value: Industrial temperature rating (–40°C to +85°C) and 2,000 V ESD tolerance ensure reliable operation without derating or shielding. |
Use Scenario: Holding certified diagnostic firmware in handheld ultrasound or glucose monitors powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-voltage OTP memory enabling direct connection to unregulated 2.7–3.6 V battery rail without DC-DC conversion. Use Value: 20 µA max standby current extends usable battery life beyond 5 years in always-ready clinical devices. |
| Legacy 5 V Embedded System Upgrade | Automotive Body Control Module Configuration |
Use Scenario: Replacing obsolete AT27C040 in legacy 5 V industrial controllers where board space and pinout are fixed. IC Role / Device Role / Timing Role: Pin- and function-compatible EPROM drop-in replacement supporting identical programming hardware and timing. Use Value: Full JEDEC AT27C040 compatibility ensures zero firmware or PCB changes while adding low-voltage flexibility. |
Use Scenario: Storing vehicle-specific calibration tables and feature-enable bits in body control units exposed to automotive thermal cycling. IC Role / Device Role / Timing Role: OTP memory storing immutable configuration data accessed during MCU initialization sequence. Use Value: High-reliability CMOS process with 200 mA latchup immunity withstands load-dump transients in 12 V automotive electrical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-12JC | 5 V-only operation (4.5–5.5 V); no 2.7–3.6 V support; same 120 ns tACC and 32-lead PLCC package | Lacks battery-voltage capability; requires regulated 5 V supply; not suitable for unregulated portable systems | Select when legacy 5 V infrastructure and PLCC socket compatibility are mandatory |
| MX29LV400CTTI-12G | 3 V Flash (not OTP); 120 ns access; 48-pin TSOP; supports erase/rewrite; higher write endurance but larger footprint | Reprogrammable vs. one-time; requires different command sequences and voltage sequencing; not pin-compatible | Select when field firmware updates are required; avoid if strict OTP security or exact AT27C040 footprint is needed |
Compared with AT27C040-12JC, AT27BV040-12TC adds unregulated battery operation and lower standby current but retains identical programming flow; versus MX29LV400CTTI-12G, it offers true OTP security and smaller 32-pin footprint but no reprogrammability.
Availability
AT27BV040-12TC is available at Aetrix Electronics and suitable for industrial automation, portable medical instrumentation, and automotive body electronics requiring stable component supply across extended lifecycle windows.
Supply support for AT27BV040-12TC 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 embedded systems.
The AT27BV040 belongs to Atmel's Battery-Voltage™ OTP EPROM product line, designed specifically to eliminate voltage regulation in portable and battery-powered applications while maintaining full compatibility with legacy 5 V EPROM infrastructure.
FAQ
What voltage ranges does the AT27BV040-12TC support during normal read operation?
The AT27BV040-12TC supports two distinct read voltage ranges: 2.7 V to 3.6 V for unregulated battery operation and 4.5 V to 5.5 V for standard 5 V systems. Both ranges deliver guaranteed 120 ns access time. It does not operate at intermediate voltages like 4.0 V or 3.0 V alone - only within these two defined bands. The AT27BV040-12TC automatically adapts I/O thresholds to match the selected supply range.
Is the AT27BV040-12TC pin-compatible with the AT27C040 series?
Yes, the AT27BV040-12TC is fully pin-compatible with the AT27C040 in all supported packages, including the 32-lead TSOP variant. Signal names, pin positions, and functional behavior (CE/OE control, address/data mapping) match exactly. This allows direct substitution in existing AT27C040-12TC designs without PCB modification, while adding dual-voltage capability and lower power consumption.
What programming voltage and equipment are required for the AT27BV040-12TC?
The AT27BV040-12TC requires VPP = 13.0 V ± 0.25 V and VCC = 6.5 V ± 0.25 V during programming, with strict sequencing: VCC must be applied simultaneously with or before VPP, and removed simultaneously or after VPP. Standard AT27C040 programmers that support 12–13 V VPP and Rapid™ algorithm recognition can program the AT27BV040-12TC without hardware changes.
Does the AT27BV040-12TC support product identification codes, and how are they accessed?
Yes, the AT27BV040-12TC features an Integrated Product Identification Code with Manufacturer ID 0x1E and Device ID 0x0B, identical to the AT27C040. To read it: hold A1–A18 low, apply VH (11.5–12.5 V) to A9, and toggle A0 between VIL (for manufacturer byte) and VIH (for device byte) while keeping CE and OE low. This enables automatic detection by industry-standard programmers.
What decoupling capacitance is required for stable operation of the AT27BV040-12TC?
Each AT27BV040-12TC requires a minimum 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close to the device pins as possible. For boards with multiple AT27BV040-12TC devices or large EPROM arrays, a 4.7 µF bulk electrolytic capacitor must also be added near the main power entry point to suppress supply ripple and transient coupling during CE transitions.
AT27BV040-12TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT27BV040-12TC FAQ
1.How can I place an order for AT27BV040-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV040-12TC 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 AT27BV040-12TC reliable?
The price and inventory of AT27BV040-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV040-12TC is usually 5 days.
3.What payment methods are accepted for AT27BV040-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV040-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV040-12TC?
AT27BV040-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV040-12TC 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 AT27BV040-12TC?
For technical support, including AT27BV040-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV040-12TC requirements.
6.How does Aetrix verify that AT27BV040-12TC is sourced from the original manufacturer or authorized distributors?
All AT27BV040-12TC 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 AT27BV040-12TC meets industry standards.
7.What is the process for return or replacement of AT27BV040-12TC?
All AT27BV040-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV040-12TC, 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 AT27BV040-12TC part is unused and in its original packaging.
Return procedure for AT27BV040-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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