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Microchip Technology AT27C2048-12VI
- Part No.:
- AT27C2048-12VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27C2048-12VI.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,487
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Product details
Overview
AT27C2048-12VI from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM optimized for high-performance 16/32-bit microprocessor systems, featuring 120 ns read access time, 5V ±10% supply operation, and industrial temperature range (–40°C to +85°C). It supports rapid programming at 50 µs/word and delivers 35 mA active current at 5 MHz.
For engineers reviewing the AT27C2048-12VI datasheet, AT27C2048-12VI pinout, AT27C2048-12VI application, or AT27C2048-12VI equivalent, key selection considerations include JEDEC-standard VSOP packaging, dual-line control (CE/OE), CMOS/TTL compatibility, integrated product identification code, and direct upgrade path from AT27C516 and AT27C1024.
Technical Context
The AT27C2048-12VI implements a 128K-word × 16-bit OTP memory array with X/Y decoding architecture and output buffers supporting high-speed bus interfacing. Its two-line control logic (CE and OE) eliminates bus contention in multiprocessor or shared-bus environments.
It uses Atmel's Rapid™ Programming Algorithm requiring 13.0 V VPP and 6.5 V VCC during programming, with built-in verification loops per word and support for manufacturer/device identification via A9 and A0 toggling under specific voltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K × 16 organization) |
| Read Access Time | 120 ns maximum - enables zero-WAIT-state operation with 8.3 MHz bus timing |
| Supply Voltage | 5 V ±10% - compatible with standard TTL/CMOS logic rails without regulation overhead |
| Active Current | 35 mA max at 5 MHz - defines power budget for embedded firmware storage subsystems |
| Standby Current | 100 µA maximum - supports low-power retention in battery-backed or intermittent-read systems |
| Programming Voltage | VPP = 13.0 V ±0.25 V - requires dedicated programming supply, not derived from VCC |
| ESD Protection | 2,000 V HBM - ensures robustness during handling and board assembly |
Pinout & Package
AT27C2048-12VI is supplied in a 40-lead Plastic Thin Small Outline Package (VSOP), 10 mm × 14 mm footprint, JEDEC MO-142 CA compliant, with gull-wing leads and exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus interface; selects one of 128K words in linear memory map |
| O0–O15 | Data Outputs | 16-bit bidirectional data bus outputs; CMOS/TTL-compatible drive strength |
| CE | Chip Enable | Active-low global enable; controls device participation in memory-mapped bus cycles |
| OE | Output Enable | Active-low output gate; allows shared bus operation without tristate conflicts |
| PGM | Program Strobe | Active-low pulse input triggering 50 µs programming cycle under VPP = 13 V |
| VPP | Programming Voltage | 13 V input required only during programming; must be applied after VCC and removed before VCC |
| VCC | Power Supply | 5 V ±10% main supply; powers logic and output drivers during read and standby modes |
| GND | Ground | Two dedicated ground pins required for noise immunity and decoupling stability |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with automatic verify-reprogram loop up to 10 pulses per word |
| Integrated Product Identification Code | Manufacturer ID (001Eh) and Device Code (00F7h) readable via A9/VH and A0 toggle under VPP = 13 V |
| Dual-Line Control Architecture | Independent CE and OE inputs eliminate bus contention and support interleaved memory access |
| JEDEC-Standard Packaging | VSOP (40V), PDIP (40P6), and PLCC (44J) options ensure drop-in replacement across legacy platforms |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2,000 V ESD protection meet industrial system robustness requirements |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O configuration in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile boot-time firmware memory providing deterministic 120 ns read latency to CPU during cold start and watchdog recovery. Use Value: Industrial temperature rating (–40°C to +85°C) and 100 µA standby current enable reliable operation without thermal derating or auxiliary power management. |
Use Scenario: Replacing obsolete 1M-bit EPROMs in legacy medical or test equipment where PCB layout cannot be modified. IC Role / Device Role / Timing Role: Pin-compatible OTP ROM delivering 2× density upgrade from AT27C1024 while maintaining identical 40-pin VSOP footprint and signal timing. Use Value: Direct upgrade path preserves existing board design and firmware toolchain, reducing requalification effort and time-to-market. |
| Automotive Diagnostic Module Memory | Avionics Configuration Data Storage |
Use Scenario: Holding calibration tables and diagnostic protocol stacks in OBD-II modules subjected to wide ambient temperature swings and vibration. IC Role / Device Role / Timing Role: High-reliability OTP memory with 2,000 V ESD and 200 mA latchup immunity, accessed via 16-bit parallel bus during vehicle startup. Use Value: Robustness against electrical transients and thermal cycling eliminates need for external protection circuitry or refresh logic. |
Use Scenario: Storing flight-critical configuration parameters in airborne data concentrators where data integrity must persist over decades without refresh. IC Role / Device Role / Timing Role: One-time programmable memory with verified 100-year data retention (per Atmel reliability testing) and no write-cycle wear-out mechanism. Use Value: Eliminates risk of accidental overwrite or corruption during mission-critical operation, unlike flash or EEPROM alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-12PC | Same die, 40-lead PDIP package (600 mil width); higher profile and larger PCB footprint | Suitable for through-hole prototyping or legacy socketed designs; lacks surface-mount compatibility | Select when mechanical constraints require DIP sockets or manual rework capability |
| AT27C2048-12JI | Same die and VSOP package, but rated for industrial temperature range with tighter AC timing specs (tACC = 120 ns guaranteed) | Identical thermal spec to AT27C2048-12VI; differs only in ordering code suffix and traceability marking | Functionally identical part; VI and JI variants share same wafer lot qualification and reliability data |
Compared with AT27C2048-12PC and AT27C2048-12JI, the AT27C2048-12VI offers identical electrical performance and industrial temperature support in the space-optimized VSOP package, making it optimal for modern compact PCB layouts requiring surface-mount assembly and long-term obsolescence resilience.
Availability
AT27C2048-12VI is available at Aetrix Electronics and suitable for industrial automation, avionics configuration storage, and legacy embedded system upgrades requiring stable component supply, long-lifecycle availability, and JEDEC-standard OTP EPROM compatibility.
Supply support for AT27C2048-12VI 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, with a legacy of high-reliability industrial and automotive-grade products.
The AT27C2048 product line was designed to deliver cost-effective, pin-compatible OTP EPROM upgrades for 16/32-bit microprocessor systems requiring deterministic boot-time firmware access and long-term data retention without refresh.
FAQ
What is the operating temperature range for AT27C2048-12VI?
The AT27C2048-12VI is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per Atmel's DC and AC operating conditions table and applies to all read, standby, and output-enable functions. The device maintains full timing compliance (tACC ≤ 120 ns) and current limits (ICC ≤ 35 mA, ISB ≤ 100 µA) across this full range, making it suitable for deployment in uncontrolled environmental enclosures.
Does AT27C2048-12VI require a separate programming voltage during normal operation?
No, AT27C2048-12VI operates from a single 5 V ±10% supply (VCC) during read and standby modes. VPP = 13.0 V is required only during programming - it must be applied after VCC and removed before VCC per datasheet sequencing rules. In normal system operation, VPP is tied to VCC or left floating (with appropriate decoupling), and no external high-voltage source is needed.
Can AT27C2048-12VI replace AT27C1024 in an existing design?
Yes, AT27C2048-12VI is explicitly designated as a direct upgrade from AT27C1024 (1M-bit) and AT27C516 (512K-bit) EPROMs. It shares identical pinout, voltage levels, timing interface (CE/OE), and package footprints (including 40-lead VSOP), enabling drop-in replacement with doubled memory capacity - no PCB or firmware changes are required beyond adjusting address decoding for the extended 17-bit address bus.
What decoupling capacitors are required for stable AT27C2048-12VI operation?
Per Atmel's system considerations, AT27C2048-12VI requires a 0.1 µF ceramic capacitor placed between VCC and GND as close to the device as possible to suppress high-frequency transients. For boards with multiple EPROMs, a 4.7 µF bulk electrolytic capacitor should also be placed near the power entry point. These values are mandatory to prevent VCC excursions that could cause non-conformance or data corruption during CE transitions.
How is the product identification code read from AT27C2048-12VI?
The AT27C2048-12VI integrates a Manufacturer ID (001Eh) and Device Code (00F7h) accessible via its identification mode: apply VPP = 12.0 V, hold A1–A16 low, set A9 = VH (11.5–12.5 V), and toggle A0 between VIL (for Manufacturer ID) and VIH (for Device Code). Outputs O0–O15 reflect the corresponding 16-bit hex code, enabling automated programmer validation and BOM traceability.
AT27C2048-12VI 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:
- 2Mbit
- Memory Organization:
- 128K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 120 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT27C2048-12VI FAQ
1.How can I place an order for AT27C2048-12VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-12VI 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 AT27C2048-12VI reliable?
The price and inventory of AT27C2048-12VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-12VI is usually 5 days.
3.What payment methods are accepted for AT27C2048-12VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-12VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-12VI?
AT27C2048-12VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-12VI 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 AT27C2048-12VI?
For technical support, including AT27C2048-12VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-12VI requirements.
6.How does Aetrix verify that AT27C2048-12VI is sourced from the original manufacturer or authorized distributors?
All AT27C2048-12VI 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 AT27C2048-12VI meets industry standards.
7.What is the process for return or replacement of AT27C2048-12VI?
All AT27C2048-12VI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-12VI, 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 AT27C2048-12VI part is unused and in its original packaging.
Return procedure for AT27C2048-12VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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