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Microchip Technology AT27C2048-70VI
- Part No.:
- AT27C2048-70VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27C2048-70VI.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,553
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Product details
Overview
AT27C2048-70VI from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM optimized for high-performance 16/32-bit microprocessor systems, featuring 70 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 CMOS/TTL-compatible I/O with 100 µA max standby current.
For engineers reviewing the AT27C2048-70VI datasheet, AT27C2048-70VI pinout, AT27C2048-70VI application, or AT27C2048-70VI equivalent, key selection criteria include its 40-pin VSOP package, dual-line control (CE/OE), 128K-word × 16-bit organization, and compatibility with legacy AT27C516/AT27C1024 firmware upgrades in embedded boot memory and FPGA configuration storage.
Technical Context
The AT27C2048-70VI implements a standard OTP EPROM architecture with X/Y decoding, output buffers, and integrated product identification logic. Its two-line enable scheme (CE and OE) eliminates bus contention during high-speed read cycles, and address inputs A0–A16 directly map to 128K word locations.
Programming uses a dedicated VPP = 13.0V pulse applied via PGM strobe, with Rapid™ algorithm enabling verified write cycles in ≤50 µs per word. The device includes on-chip identification code accessible via A9 voltage control and A0 toggling, supporting automated programmer recognition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K × 16) - supports full 16-bit data bus interface without byte-lane splitting. |
| Read Access Time | 70 ns max - eliminates WAIT states in 5 MHz microprocessor systems. |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage required for read mode. |
| Standby Current | 100 µA max - enables low-power retention in battery-backed or intermittent-operation systems. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and automotive under-hood applications. |
| Programming Voltage | VPP = 13.0V ±0.25V - requires external high-voltage source; not needed during normal read operation. |
| ESD Protection | 2,000V HBM - ensures robust handling during board assembly and field service. |
Pinout & Package
AT27C2048-70VI is supplied in a 40-lead VSOP (10 mm × 14 mm) package per JEDEC MO-142 CA, with gull-wing leads and exposed pad not electrically connected. Both GND pins (pins 21 and 39) must be soldered to system ground plane for stable operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus selects one of 128K words; A16 enables full 2-Mbit addressing. |
| O0–O15 | Data Outputs | 16-bit bidirectional data path; outputs driven only when CE=OE=low. |
| CE | Chip Enable | Active-low global enable; controls device power state and output driver activation. |
| OE | Output Enable | Active-low output gate; allows shared bus operation without tristate conflicts. |
| PGM | Program Strobe | Active-low signal initiating 50 µs programming pulse when VPP = 13V is applied. |
| VPP | Programming Voltage | 13.0V input required only during programming; must be applied after and removed before VCC. |
| VCC | Power Supply | 5V ±10% main supply; powers logic and output drivers during read and standby modes. |
| GND (2×) | Ground Reference | Two dedicated ground pins ensure low-impedance return path for both core logic and I/O drivers. |
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 ID Code | Manufacturer ID (001Eh) and Device Code (00F7h) readable via A9/VH and A0 toggle - enables auto-detection by programmers. |
| Dual-Line Control (CE/OE) | Eliminates bus contention in multi-device systems; supports interleaved read timing with tOE = 30 ns max. |
| JEDEC-Standard Packages | VSOP footprint (40V) matches industry layout standards; pin-compatible with PDIP and PLCC variants for design reuse. |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2,000V ESD protection ensure field reliability in noisy industrial environments. |
Applications
| Embedded Boot Memory | FPGA Configuration Storage |
|---|---|
|
Use Scenario: Storing BIOS or bootloader firmware for ARM Cortex-M or PowerPC-based industrial controllers. IC Role / Device Role / Timing Role: Nonvolatile read-only memory providing deterministic 70 ns instruction fetch latency during cold start. Use Value: Eliminates boot delay from mass storage; supports direct XIP execution without RAM copy due to fast random-access timing. |
Use Scenario: Holding configuration bitstreams for Xilinx Spartan or Intel MAX 7000-series FPGAs in test equipment. IC Role / Device Role / Timing Role: Static configuration ROM accessed once at power-up; CE-controlled enable aligns with FPGA INIT sequence. Use Value: Ensures bitstream integrity across power cycles; 128K × 16 capacity accommodates full configuration for mid-complexity FPGAs. |
| Legacy System Upgrade | Industrial PLC Firmware |
|
Use Scenario: Replacing obsolete AT27C1024 in avionics maintenance test sets requiring same-pinout migration. IC Role / Device Role / Timing Role: Drop-in higher-density EPROM with identical 40-pin VSOP footprint and CE/OE timing behavior. Use Value: Doubles firmware capacity without PCB redesign; maintains backward compatibility with existing socket and timing margins. |
Use Scenario: Storing ladder logic and I/O mapping tables in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Industrial-temperature OTP memory retaining firmware through wide ambient swings and EMI exposure. Use Value: Guarantees firmware persistence over 20+ year service life; 100 µA standby current minimizes thermal load in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-70PI | Same die, 40-lead PDIP package (40P6); 0.600" width; higher thermal resistance and larger footprint. | Suitable for prototyping or through-hole manufacturing; lacks VSOP's space efficiency and thermal performance. | Select when board layout uses DIP sockets or requires manual rework accessibility. |
| AT27C2048-70JC | Same die, 44-lead PLCC package (44J); J-lead construction; requires different land pattern and reflow profile. | Preferred for high-vibration environments due to gull-wing mechanical stability; incompatible pinout vs. VSOP. | Choose for ruggedized designs where PLCC's shock resistance outweighs VSOP's size advantage. |
Compared with AT27C2048-70PI and AT27C2048-70JC, the AT27C2048-70VI offers superior board-area efficiency and thermal dissipation in surface-mount production, while maintaining identical timing, programming behavior, and functional compatibility across all three packages.
Availability
AT27C2048-70VI is available at Aetrix Electronics and suitable for industrial PLC firmware, FPGA configuration storage, embedded boot memory, and legacy system upgrades requiring stable component supply across extended product lifecycles.
Supply support for AT27C2048-70VI 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.
The AT27C2048 belongs to Atmel's OTP EPROM product line, designed specifically for reliable, cost-effective firmware storage in industrial, automotive, and communications equipment where reprogrammability is unnecessary but long-term data retention is critical.
FAQ
What is the operating voltage range for AT27C2048-70VI?
The AT27C2048-70VI operates from a single 5V ±10% supply (4.5V to 5.5V) in read and standby modes. During programming, VPP must be raised to 13.0V ±0.25V while VCC remains at 6.5V ±0.25V. The AT27C2048-70VI does not support 3.3V operation or dual-supply configurations.
Does AT27C2048-70VI support in-system programming?
No, the AT27C2048-70VI requires external EPROM programmer hardware with high-voltage (13V) capability and precise timing control for the 50 µs PGM pulse. It cannot be programmed in-circuit without dedicated VPP routing and isolation; the AT27C2048-70VI is strictly an OTP device with no serial or parallel ISP interface.
What is the meaning of the 'VI' suffix in AT27C2048-70VI?
The 'VI' suffix in AT27C2048-70VI denotes Industrial temperature grade (–40°C to +85°C) and VSOP package (40V). The '70' specifies 70 ns maximum access time. This distinguishes it from commercial-grade variants (e.g., 'VC') and alternate packages like PDIP ('PI') or PLCC ('JI'). The AT27C2048-70VI is fully specified across this extended range.
How many address lines does AT27C2048-70VI require?
The AT27C2048-70VI requires 17 address lines (A0–A16) to access its full 128K-word capacity. A16 is necessary to select the upper half of the 2-Mbit array; omitting A16 limits addressing to 64K words. All 17 lines must be driven to guarantee correct word selection across the entire memory map of the AT27C2048-70VI.
Is AT27C2048-70VI pin-compatible with AT27C1024?
No, AT27C2048-70VI is not pin-compatible with AT27C1024. While both use 40-pin packages, AT27C1024 has only 17 address pins (A0–A16) but maps them differently and lacks PGM and VPP pins. The AT27C2048-70VI adds A16 functionality and requires VPP for programming - making direct socket replacement impossible without board modification.
AT27C2048-70VI 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:
- 70 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
AT27C2048-70VI FAQ
1.How can I place an order for AT27C2048-70VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-70VI 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 AT27C2048-70VI reliable?
The price and inventory of AT27C2048-70VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-70VI is usually 5 days.
3.What payment methods are accepted for AT27C2048-70VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-70VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-70VI?
AT27C2048-70VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-70VI 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 AT27C2048-70VI?
For technical support, including AT27C2048-70VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-70VI requirements.
6.How does Aetrix verify that AT27C2048-70VI is sourced from the original manufacturer or authorized distributors?
All AT27C2048-70VI 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 AT27C2048-70VI meets industry standards.
7.What is the process for return or replacement of AT27C2048-70VI?
All AT27C2048-70VI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-70VI, 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 AT27C2048-70VI part is unused and in its original packaging.
Return procedure for AT27C2048-70VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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