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Microchip Technology AT27C2048-12VC
- Part No.:
- AT27C2048-12VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27C2048-12VC.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,869
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Product details
Overview
AT27C2048-12VC from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM with 55 ns read access time, 5V ±10% supply, and VSOP-40 (10 mm × 14 mm) package. It supports high-speed 16-bit microprocessor systems, delivers 35 mA active current at 5 MHz, and features Rapid™ programming at 50 µs/word. Used in firmware storage for industrial control and embedded boot code.
For engineers reviewing the AT27C2048-12VC datasheet, AT27C2048-12VC pinout, AT27C2048-12VC application, or AT27C2048-12VC equivalent, key selection criteria include read timing (tACC = 120 ns), VPP programming voltage (12.0 V), dual-line control (CE/OE), OTP reliability, and JEDEC-standard VSOP packaging compatibility.
Technical Context
The AT27C2048-12VC implements a CMOS-based OTP EPROM architecture with 128K-word × 16-bit organization, accessed via 17 address lines (A0–A16) and 16 bidirectional data outputs (O0–O15). Its two-line control logic (CE and OE) enables bus contention avoidance in high-speed systems.
It uses a dedicated VPP pin (12.0 V ±0.5 V) for programming, supports product identification via A9 voltage sensing and A0 toggling, and incorporates integrated ESD protection (2,000 V) and latchup immunity (200 mA). Standby current is specified at ≤100 µA with CE high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K × 16), enabling full boot firmware storage for 16-bit MCUs without external banking logic |
| Read Access Time | 120 ns max (tACC), eliminating WAIT states in 8-MHz Z80 or 16-MHz 80C186 systems |
| Supply Voltage | 5V ±10%, compatible with standard TTL/CMOS logic rails and legacy 5V system power domains |
| Active Current | 35 mA max at 5 MHz, limiting thermal load in dense EPROM arrays on industrial PCBs |
| Standby Current | 100 µA max (ISB1), supporting low-power hold modes during processor sleep cycles |
| Programming Voltage | VPP = 12.0 V ±0.5 V, requiring isolated high-voltage generation but avoiding external charge pumps |
| ESD Protection | 2,000 V HBM, permitting safe handling in non-EPA assembly environments without special grounding protocols |
Pinout & Package
AT27C2048-12VC is supplied in a 40-lead Plastic Thin Small Outline Package (VSOP), 10 mm × 14 mm body, JEDEC MO-142 CA compliant, with 0.5 mm lead pitch and gull-wing terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus interface; A0–A16 fully decode 128K words without external address latching |
| O0–O15 | Data Outputs | 16-bit bidirectional data bus; TTL/CMOS-compatible drive strength supports direct connection to 80C186 or 68020 data lines |
| CE | Chip Enable | Active-low chip select; enables memory mapping into upper 128K of 16-bit address space when asserted with OE |
| OE | Output Enable | Active-low output gate; allows shared bus operation by tri-stating outputs when deasserted, independent of CE state |
| PGM | Program Strobe | Active-low programming pulse input; initiates 50 µs word programming cycle when VPP = 12 V and CE low |
| VPP | Programming Voltage | 12.0 V ±0.5 V input; must be applied after VCC and removed before VCC to prevent latchup or data corruption |
| VCC | Power Supply | +5V ±10% main supply; powers core logic and I/O buffers; requires local 0.1 µF ceramic decoupling |
| GND (Pins 13 & 40) | Ground | Dual ground pins mandatory per datasheet; both must be connected to minimize ground bounce in fast read cycles |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time reduces firmware update cycle time by >90% vs. legacy EPROMs |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F7h) readable via A9/A0 control, enabling auto-detection in universal programmers |
| Two-Line Control (CE/OE) | Independent chip and output enable permits interleaved memory access and eliminates bus contention in multiprocessor designs |
| JEDEC-Standard Packages | VSOP-40 footprint matches industry layout standards, allowing drop-in replacement of AT27C1024-12VC in existing 10×14 mm footprints |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2,000 V ESD rating ensure robustness in factory-programmed modules deployed in harsh industrial cabinets |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic firmware in DIN-rail mounted programmable logic controllers operating continuously at 60°C ambient. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing immediate instruction fetch upon power-up; accessed via 16-bit data bus of Renesas SH-2 MCU. Use Value: 120 ns tACC ensures zero-wait-state execution of initialization routines, reducing system boot time to <100 ms. |
Use Scenario: Replacing obsolete 27C1024 in avionics maintenance test equipment requiring field-upgradable calibration tables. IC Role / Device Role / Timing Role: OTP configuration store holding sensor compensation coefficients; programmed once during final test using standard EPROM programmer. Use Value: Integrated ID code guarantees correct algorithm selection in automated programming stations, preventing firmware mismatch errors. |
| Medical Device Diagnostic Code | Telecom Line Card Bootloader |
Use Scenario: Holding immutable diagnostic self-test routines in Class II medical infusion pumps certified to IEC 62304. IC Role / Device Role / Timing Role: Read-only instruction store mapped to CPU reset vector; immune to accidental overwrite during runtime. Use Value: 100 µA max standby current extends battery backup duration during AC power loss, maintaining watchdog supervision for >72 hours. |
Use Scenario: Storing bootloader code in carrier-grade DSLAM line cards where firmware integrity is enforced by regulatory audit trails. IC Role / Device Role / Timing Role: Secure, tamper-evident firmware repository; programmed at factory with traceable lot-controlled EPROM writers. Use Value: VPP = 12.0 V requirement prevents unauthorized reprogramming in-field, satisfying telecom security compliance requirements. |
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 (0.600" width); higher profile (4.8 mm) and larger footprint (15.2 × 38.1 mm) | Suitable for through-hole prototyping or legacy board rework where VSOP reflow is unavailable | Select when manual soldering, socket-based testing, or compatibility with existing DIP sockets is required |
| AT27C2048-12JI | Same functionality and VSOP-40 package, but rated for -40°C to +85°C industrial temperature range | Required for outdoor telecom enclosures or automotive under-hood control units exposed to extended thermal cycling | Select when operating ambient exceeds 70°C or storage below 0°C is mandated by system specification |
Compared with AT27C2048-12VC, the -12PC offers mechanical flexibility for lab validation but increases board area by 3.8×; the -12JI extends thermal margin at no timing or interface cost, making it ideal for mission-critical deployments where environmental stress exceeds commercial limits.
Availability
AT27C2048-12VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded boot ROM, medical device diagnostic code, and telecom line card bootloader applications requiring stable component supply across multi-year production cycles.
Supply support for AT27C2048-12VC 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 was a U.S.-based semiconductor designer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs before its acquisition by Microchip Technology in 2016.
The AT27C2048 belongs to Atmel's OTP EPROM product line, engineered for reliable, factory-programmed firmware storage in cost-sensitive industrial and embedded systems where EEPROM endurance or Flash reprogrammability is unnecessary.
FAQ
What is the maximum operating temperature range for the AT27C2048-12VC?
The AT27C2048-12VC is rated for the commercial temperature range of 0°C to +70°C. This specification applies to both operation and storage conditions as defined in the absolute maximum ratings table. The device is not qualified for industrial (-40°C to +85°C) use unless marked with suffix 'I' (e.g., AT27C2048-12VI). Thermal derating is not supported beyond the stated range.
Does the AT27C2048-12VC require a separate VPP voltage during normal read operation?
No, the AT27C2048-12VC operates in read mode using only the 5V ±10% VCC supply; VPP is disconnected or tied to VCC during read cycles. VPP = 12.0 V ±0.5 V is required exclusively during programming and verification phases, and must be applied after VCC and removed before VCC to prevent device damage.
Can the AT27C2048-12VC be used as a direct replacement for AT27C1024-12VC in an existing design?
Yes, the AT27C2048-12VC is explicitly designed as a direct upgrade from AT27C1024 (1M-bit) and AT27C516 (512K-bit) EPROMs. It shares identical pinout, timing interface, and VSOP-40 package dimensions, enabling drop-in replacement without PCB modification-provided address decoding accommodates the extended A16 line.
What decoupling capacitance is required for stable operation of the AT27C2048-12VC?
The AT27C2048-12VC requires a minimum 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins. For systems with multiple EPROMs, a bulk 4.7 µF electrolytic capacitor should also be added near the power entry point to suppress array-level supply ripple.
How is the manufacturer and device identification code read from the AT27C2048-12VC?
The AT27C2048-12VC provides two identification words via its O0–O15 outputs. To read them: hold A1–A16 low, set A9 to 12.0 V (VID), and toggle A0-low selects the Manufacturer ID (001Eh), high selects the Device Code (00F7h). This occurs during normal read mode with CE and OE asserted.
AT27C2048-12VC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT27C2048-12VC FAQ
1.How can I place an order for AT27C2048-12VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-12VC 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 AT27C2048-12VC reliable?
The price and inventory of AT27C2048-12VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-12VC is usually 5 days.
3.What payment methods are accepted for AT27C2048-12VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-12VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-12VC?
AT27C2048-12VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-12VC 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 AT27C2048-12VC?
For technical support, including AT27C2048-12VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-12VC requirements.
6.How does Aetrix verify that AT27C2048-12VC is sourced from the original manufacturer or authorized distributors?
All AT27C2048-12VC 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 AT27C2048-12VC meets industry standards.
7.What is the process for return or replacement of AT27C2048-12VC?
All AT27C2048-12VC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-12VC, 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 AT27C2048-12VC part is unused and in its original packaging.
Return procedure for AT27C2048-12VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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