My Inquiry
My Account
Microchip Technology AT27BV040-12VI
- Part No.:
- AT27BV040-12VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27BV040-12VI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,223
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT27BV040-12VI from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM with 120 ns read access time, dual-voltage operation (2.7–3.6V or 4.5–5.5V), and industrial temperature range (−40°C to +85°C). It delivers TTL-compatible outputs at 3.0V and supports unregulated battery power, making it ideal for portable instrumentation and embedded control firmware storage.
For engineers reviewing the AT27BV040-12VI datasheet, AT27BV040-12VI pinout, AT27BV040-12VI application, or AT27BV040-12VI equivalent, key selection criteria include its 120 ns tACC timing, 20 µA max standby current at 3.6V, JEDEC-standard 32-lead VSOP package, and Rapid™ programming algorithm (100 µs/byte typical).
Technical Context
The AT27BV040-12VI implements a CMOS OTP memory array with two-line control (CE/OE), enabling bus contention avoidance in shared-data-bus systems. Its dual-supply architecture allows direct interfacing with both 3.3V microcontrollers and legacy 5V logic without level shifters.
It features integrated product identification (Manufacturer ID = 0x1E, Device ID = 0x0B), VPP-controlled programming (13.0V ±0.25V), and robust ESD protection (2,000V HBM). Programming requires VCC = 6.5V and follows a verify-reprogram loop per byte, with up to 10 pulses applied on failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304-bit (512K × 8) OTP EPROM - fixed firmware storage with no erase capability |
| Read Access Time (tACC) | 120 ns max at VCC = 2.7–3.6V or 4.5–5.5V - enables real-time boot code fetch in 5 MHz bus systems |
| Supply Voltage Range | 2.7–3.6V or 4.5–5.5V - supports direct battery connection (no regulator needed) and mixed-voltage system compatibility |
| Standby Current (ISB1) | 20 µA max at VCC = 3.6V, CE = VCC ±0.3V - extends battery life in always-on portable devices |
| Active Current (ICC) | 10 mA max at f = 5 MHz, VCC = 3.6V - low-power operation compatible with 3.3V MCU I/O domains |
| Operating Temperature | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor equipment |
| Programming Voltage (VPP) | 13.0V ±0.25V - requires dedicated high-voltage supply during one-time programming only |
Pinout & Package
AT27BV040-12VI is packaged in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm, JEDEC MO-142 BA compliant, with gull-wing leads and pin 1 index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A0 least significant bit |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus in read mode; high-impedance when OE or CE inactive |
| CE | Chip Enable | Active-low chip select; controls device activation and reduces standby current when high |
| OE | Output Enable | Active-low output gate; enables data bus drivers independently of CE for bus sharing |
| VCC | Power Supply | Primary supply for logic and memory array; accepts 2.7–3.6V or 4.5–5.5V |
| VPP | Programming Voltage | 13.0V input required only during programming; must be applied after and removed before VCC |
| GND | Ground | Reference node for all signals and supplies; requires local 0.1 µF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with automatic verify-reprogram loop - reduces production programming cycle time by >5× vs standard EPROMs |
| Dual-Voltage Read Operation | Operates natively at 2.7–3.6V or 4.5–5.5V - eliminates external voltage regulators in battery-powered designs |
| TTL-Compatible Outputs at 3.0V | VOH ≥ 2.4V and VOL ≤ 0.4V at IOL = 2.0 mA - directly drives 5V TTL inputs without level translation |
| Integrated Product ID Code | Manufacturer ID = 0x1E, Device ID = 0x0B - enables auto-detection and algorithm selection in universal programmers |
| JEDEC-Standard Packages | 32-lead VSOP (8 × 14 mm) - drop-in replacement for AT27C040 in space-constrained PCB layouts |
Applications
| Industrial PLC Firmware Storage | Portable Medical Device Boot ROM |
|---|---|
Use Scenario: Storing immutable ladder logic firmware in DIN-rail mounted programmable logic controllers exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 120 ns instruction fetch timing during cold-start sequences. Use Value: −40°C to +85°C rating ensures reliable operation in unconditioned factory environments; 20 µA standby current minimizes backup battery drain during power-loss events. |
Use Scenario: Holding certified bootloader and calibration constants in handheld ECG monitors powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: OTP firmware repository interfacing directly with 3.3V ARM Cortex-M3 microcontroller via parallel bus. Use Value: Unregulated 2.7–3.6V operation eliminates DC-DC converter, reducing BOM cost and board area; TTL-compatible outputs simplify interface design. |
| Automotive Body Control Module | Legacy Industrial Instrumentation |
Use Scenario: Storing configuration tables and diagnostic routines in vehicle door modules where ESD immunity and thermal stability are critical. IC Role / Device Role / Timing Role: Immutable parameter store accessed during CAN-initiated reconfiguration sequences. Use Value: 2,000V HBM ESD rating and 200 mA latchup immunity meet automotive component stress requirements; industrial temp grade ensures reliability under hood conditions. |
Use Scenario: Replacing obsolete 5V EPROMs in aging test equipment requiring long-term firmware availability and zero field failures. IC Role / Device Role / Timing Role: Pin-compatible upgrade path for AT27C040-based designs needing lower power and battery operation. Use Value: JEDEC-compliant 32-lead VSOP footprint allows direct PCB replacement; identical programming protocol preserves existing production infrastructure. |
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 | 5V-only operation (4.5–5.5V); no 3V support; same 120 ns tACC and 32-lead PLCC package | Requires regulated 5V supply; unsuitable for battery-powered or dual-voltage systems | Select when legacy 5V-only systems demand exact form-fit-function replacement with no voltage flexibility needed |
| MX29LV400CTTC-90G | Flash memory (not OTP); 90 ns access; 3.3V-only; 48-pin TSOP; supports in-system erase/reprogram | Enables field firmware updates but introduces complexity in write-protection and endurance management | Select when firmware update capability is required and PCB layout accommodates 48-pin footprint and 3.3V-only biasing |
Compared with AT27BV040-12VI, AT27C040-12JC lacks battery-voltage operation and low-power standby, while MX29LV400CTTC-90G trades OTP simplicity and pin compatibility for reprogrammability and slower qualification maturity in safety-critical firmware roles.
Availability
AT27BV040-12VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, portable medical device boot ROM, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for AT27BV040-12VI 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 semiconductor manufacturer specializing in microcontrollers, non-volatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27BV040-12VI belongs to Atmel's Battery-Voltage™ OTP EPROM product line, designed specifically for systems requiring low-power, unregulated battery operation without sacrificing speed or compatibility with legacy 5V architectures.
FAQ
What is the maximum operating frequency supported by AT27BV040-12VI?
The AT27BV040-12VI does not operate at a clock frequency itself-it is an asynchronous memory. Its 120 ns access time (tACC) supports reliable read cycles on buses running up to approximately 5 MHz (200 ns period), assuming adequate setup/hold timing margins. The AT27BV040-12VI datasheet specifies ICC active current at 5 MHz, confirming this operational envelope. No internal oscillator or clock input exists on the AT27BV040-12VI.
Can AT27BV040-12VI be programmed using standard EPROM programmers?
Yes-the AT27BV040-12VI uses the same programming algorithm and pinout as the AT27C040 and is supported by industry-standard programmers that recognize its Integrated Product Identification Code (0x1E/0x0B). However, it requires VPP = 13.0V ±0.25V and VCC = 6.5V during programming-voltage levels distinct from standard 5V EPROMs. The AT27BV040-12VI must not be programmed with only 5V VPP.
Is AT27BV040-12VI pin-compatible with AT27C040 in all packages?
Yes-AT27BV040-12VI shares identical pin functions and ordering codes (e.g., -12VI = 32-lead VSOP) with AT27C040 variants. The AT27BV040-12VI pinout matches AT27C040-12VC exactly in VSOP, including A0–A18, O0–O7, CE, OE, VCC, VPP, and GND assignments. JEDEC package outlines (MO-142 BA) are identical, enabling direct PCB substitution.
Does AT27BV040-12VI support 3.3V microcontroller interfaces without level shifters?
Yes-the AT27BV040-12VI produces TTL-compatible outputs at VCC = 3.0V (VOH ≥ 2.4V, VOL ≤ 0.4V), meeting 3.3V LVTTL input thresholds. Its inputs accept VIH ≥ 0.7×VCC and VIL ≤ 0.2×VCC, fully compatible with 3.3V CMOS logic. No level-shifting circuitry is required when interfacing the AT27BV040-12VI with 3.3V microcontrollers in read mode.
What decoupling capacitors are required for stable operation of AT27BV040-12VI?
The AT27BV040-12VI requires a 0.1 µF ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins to suppress high-frequency transients during CE/OE switching. For multi-device arrays, a 4.7 µF bulk electrolytic capacitor should also be added near the power entry point. These values are specified in the AT27BV040-12VI datasheet Section "Switching Considerations" and are mandatory for reliable read timing compliance.
AT27BV040-12VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-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:
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT27BV040-12VI FAQ
1.How can I place an order for AT27BV040-12VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27BV040-12VI 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 AT27BV040-12VI reliable?
The price and inventory of AT27BV040-12VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27BV040-12VI is usually 5 days.
3.What payment methods are accepted for AT27BV040-12VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27BV040-12VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27BV040-12VI?
AT27BV040-12VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27BV040-12VI 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 AT27BV040-12VI?
For technical support, including AT27BV040-12VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27BV040-12VI requirements.
6.How does Aetrix verify that AT27BV040-12VI is sourced from the original manufacturer or authorized distributors?
All AT27BV040-12VI 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 AT27BV040-12VI meets industry standards.
7.What is the process for return or replacement of AT27BV040-12VI?
All AT27BV040-12VI units undergo pre-shipment inspection (PSI). If there is an issue with AT27BV040-12VI, 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 AT27BV040-12VI part is unused and in its original packaging.
Return procedure for AT27BV040-12VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27BV040-12VI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
