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Microchip Technology AT27C2048-70VC
- Part No.:
- AT27C2048-70VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27C2048-70VC.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,047
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Product details
Overview
AT27C2048-70VC 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 VSOP-40 (10 mm × 14 mm) packaging. It delivers low active current (35 mA at 5 MHz) and ultra-low standby current (100 µA max), enabling firmware storage without mass-storage latency in industrial control and embedded boot applications.
For engineers reviewing the AT27C2048-70VC datasheet, AT27C2048-70VC pinout, AT27C2048-70VC application, or AT27C2048-70VC equivalent, key selection criteria include verified 70 ns tACC timing, 128K × 16 organization compatibility with 16-bit data buses, JEDEC-standard VSOP-40 mechanical footprint, and Rapid™ programming support requiring VPP = 13.0 V and 50 µs/word pulses.
Technical Context
The AT27C2048-70VC implements a two-line control architecture using CE and OE to manage bus contention in high-speed systems, with address decoding across A0–A16 and 16-bit bidirectional output drivers (O0–O15). Its CMOS/TTL-compatible I/O supports direct interfacing with legacy microprocessors without level-shifting.
It integrates a Rapid™ programming algorithm requiring precise VPP (13.0 V ± 0.25 V) and VCC (6.5 V ± 0.25 V) during programming, with built-in product identification code accessible via A9 and A0 toggling-enabling automatic algorithm selection in industry-standard programmers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K words × 16 bits) - supports full 16-bit data bus alignment without byte-lane splitting. |
| Read Access Time (tACC) | 70 ns maximum - eliminates WAIT states in 14.3 MHz CPU systems (e.g., Intel 80286/80386). |
| Supply Voltage | 5 V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage required for read mode. |
| Active Current (ICC) | 35 mA maximum at 5 MHz - enables thermal design for dense EPROM arrays without forced cooling. |
| Standby Current (ISB) | 100 µA maximum - allows battery-backed retention in low-power industrial controllers. |
| Programming Speed | 50 µs/word typical - reduces firmware burn time by >90% vs. legacy EPROMs (e.g., AT27C1024). |
| ESD Protection | 2,000 V HBM - meets IEC 61000-4-2 Level 3 for handling in non-EPA environments. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded systems including PLCs and motor drives. |
Pinout & Package
AT27C2048-70VC uses 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 1 marked by notch; both GND pins (19 and 39) must be connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting 128K-word addressing; A16 enables full memory space access. |
| O0–O15 | Data Outputs | True 16-bit parallel outputs; CMOS/TTL-compatible drive strength (IOL = 2.1 mA, IOH = -400 µA). |
| CE | Chip Enable | Active-low chip select; controls device enable/disable; used with OE for bus contention management. |
| OE | Output Enable | Active-low output gate; decouples outputs from bus when high (High-Z state). |
| PGM | Program Strobe | Active-low programming pulse input; initiates 50 µs word programming cycle when VPP = 13.0 V. |
| VPP | Programming Voltage | 13.0 V ± 0.25 V input during programming; must be applied after and removed before VCC. |
| VCC | Power Supply | 5 V ± 10% supply for read/standby; elevated to 6.5 V during programming. |
| GND (Pins 19, 39) | Ground | Dual ground connections reduce noise coupling; both must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with auto-verify loop - cuts firmware update cycles from minutes to seconds. |
| Integrated Product Identification Code | Manufacturer ID (001Eh) and Device Code (00F7h) readable via A9/A0 control - ensures correct algorithm selection in automated programmers. |
| Two-Line Control (CE/OE) | Independent chip and output enables - prevents bus contention during multi-device memory mapping in 16-bit systems. |
| JEDEC-Standard VSOP-40 Packaging | 10 mm × 14 mm footprint with 0.5 mm pitch - enables high-density PCB layouts while maintaining hand-solderability. |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2,000 V ESD protection - sustains operation in electrically noisy industrial environments. |
| Direct Upgrade Path | Pin- and software-compatible replacement for AT27C516 (512K-bit) and AT27C1024 (1M-bit) - simplifies memory capacity scaling. |
Applications
| Industrial PLC Firmware Storage | Legacy Microprocessor Boot ROM |
|---|---|
Use Scenario: Storing ladder logic firmware in modular programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 70 ns read access to instruction fetches for real-time scan-cycle execution. Use Value: Eliminates disk-based boot delays; 100 µA standby current extends backup battery life beyond 5 years in unpowered states. |
Use Scenario: Serving as primary boot ROM for 16-bit embedded systems based on Motorola 68000 or Intel 80286 processors in test equipment and medical analyzers. IC Role / Device Role / Timing Role: 128K × 16 organization matches native data bus width, avoiding glue logic and reducing BOM count. Use Value: 5V-only read operation simplifies power design; 35 mA active current avoids thermal derating in compact enclosures. |
| Automated Test Equipment (ATE) Pattern Memory | Avionics System Configuration Storage |
Use Scenario: Holding digital stimulus/response patterns in high-speed boundary-scan testers where deterministic access timing is critical for synchronization. IC Role / Device Role / Timing Role: High-speed EPROM acting as static pattern buffer; tOE = 30 ns ensures setup margin for 33 MHz clock domains. Use Value: 70 ns tACC guarantees sub-cycle access - enabling single-cycle pattern delivery without pipeline stalls. |
Use Scenario: Storing flight-critical configuration tables (e.g., sensor calibration coefficients, fail-safe thresholds) in airborne computing modules certified to DO-254 Level A. IC Role / Device Role / Timing Role: OTP memory preventing runtime corruption; -40°C to +85°C rating meets RTCA DO-160 Section 22 Category D vibration/temperature requirements. Use Value: 2,000 V ESD protection and 200 mA latchup immunity ensure resilience against lightning-induced transients in aircraft power systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-70PC | Same die, 40-lead PDIP package (0.600" width); higher profile (4.8 mm vs. 1.2 mm) and larger footprint (19.9 mm × 7.1 mm). | Suitable for through-hole prototyping or legacy board rework; incompatible with surface-mount assembly lines. | Select only if manual assembly, socketing, or backward compatibility with AT27C1024-70PC layouts is required. |
| AT27C2048-70JI | Same die, 44-lead PLCC package; requires different land pattern (16.6 mm × 16.6 mm) and reflow profile; NC pins at 1 and 23. | Preferred for high-reliability military/aerospace designs where PLCC's mechanical robustness and thermal cycling performance are prioritized. | Choose when board-level shock/vibration resistance exceeds VSOP's capability, and J-lead reflow process is available. |
Compared with AT27C2048-70PC and AT27C2048-70JI, the AT27C2048-70VC offers the smallest PCB area (140 mm²), lowest profile (1.2 mm), and fastest assembly throughput - making it optimal for space-constrained industrial controllers and high-volume SMT production.
Availability
AT27C2048-70VC is available at Aetrix Electronics and suitable for industrial automation, embedded boot systems, and avionics configuration storage requiring stable component supply across extended product lifecycles.
Supply support for AT27C2048-70VC 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 non-volatile memory, microcontrollers, and security ICs for industrial and automotive markets.
The AT27C2048 product line was designed to deliver high-density, low-power OTP EPROMs for firmware storage in resource-constrained embedded systems - bridging the gap between mask ROM cost and flash flexibility.
FAQ
What is the guaranteed maximum read access time for AT27C2048-70VC?
The AT27C2048-70VC guarantees a maximum address-to-output delay (tACC) of 70 ns under specified conditions: VCC = 5 V ±10%, TA = -40°C to +85°C, CL = 100 pF, and load current ≤2.1 mA. This value is tested and binned during manufacturing - not a typical or average figure - ensuring deterministic timing in hard real-time systems.
Does AT27C2048-70VC require a separate programming voltage during normal read operation?
No. The AT27C2048-70VC operates from a single 5 V ±10% supply during read and standby modes. VPP (13.0 V) is required only during programming; it must be disconnected or held at 5 V during read operation to prevent excessive leakage and potential damage per the Absolute Maximum Ratings.
Can AT27C2048-70VC be used as a drop-in replacement for AT27C1024-70VC?
No. While the AT27C2048-70VC is a direct upgrade path, it is not pin-compatible with AT27C1024-70VC due to additional address lines (A16) and output bits (O8–O15). The AT27C2048-70VC requires a 40-pin VSOP footprint versus the AT27C1024-70VC's 32-pin layout, necessitating PCB redesign.
What is the purpose of the PGM pin on AT27C2048-70VC?
The PGM pin on AT27C2048-70VC is an active-low programming strobe that initiates the 50 µs word programming cycle when asserted low, provided VPP = 13.0 V and VCC = 6.5 V. It is unused (must be held high) during read/standby modes and has no function in those states.
How is the Integrated Product Identification Code accessed on AT27C2048-70VC?
The Integrated Product Identification Code on AT27C2048-70VC is accessed by holding A1–A16 low, setting A9 to 12.0 V (VID), and toggling A0: low selects Manufacturer ID (001Eh), high selects Device Code (00F7h). This occurs during dedicated identification mode, independent of CE/OE states.
AT27C2048-70VC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT27C2048-70VC FAQ
1.How can I place an order for AT27C2048-70VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-70VC 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 AT27C2048-70VC reliable?
The price and inventory of AT27C2048-70VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-70VC is usually 5 days.
3.What payment methods are accepted for AT27C2048-70VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-70VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-70VC?
AT27C2048-70VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-70VC 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 AT27C2048-70VC?
For technical support, including AT27C2048-70VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-70VC requirements.
6.How does Aetrix verify that AT27C2048-70VC is sourced from the original manufacturer or authorized distributors?
All AT27C2048-70VC 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 AT27C2048-70VC meets industry standards.
7.What is the process for return or replacement of AT27C2048-70VC?
All AT27C2048-70VC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-70VC, 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 AT27C2048-70VC part is unused and in its original packaging.
Return procedure for AT27C2048-70VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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