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Microchip Technology AT27C2048-15JI
- Part No.:
- AT27C2048-15JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C2048-15JI.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,478
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Product details
Overview
AT27C2048-15JI from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM designed for nonvolatile firmware storage in 16/32-bit microprocessor systems. It delivers 150 ns read access time, operates from a single 5V ±10% supply, and supports industrial temperature range (–40°C to +85°C) in a 44-lead PLCC package.
For engineers reviewing the AT27C2048-15JI datasheet, AT27C2048-15JI pinout, AT27C2048-15JI application, or AT27C2048-15JI equivalent, this device serves as a direct upgrade path from AT27C516 and AT27C1024 EPROMs with CMOS/TTL-compatible I/O, rapid 50 µs/word programming, and integrated product identification code for automated programming equipment.
Technical Context
The AT27C2048-15JI implements a two-line control architecture using CE and OE to eliminate bus contention in high-speed systems. Its 128K × 16 organization enables full-word parallel access without WAIT states, supporting direct interfacing with 16-bit data buses of microprocessors like Intel 80C186 or Motorola 68020.
It uses Atmel's Rapid™ Programming Algorithm requiring VPP = 13.0V ±0.25V and VCC = 6.5V ±0.25V during programming, with strict sequencing (VCC applied before VPP). The integrated product identification code-accessed via A9 = 12.0V and A0 toggled-enables 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-word fetches for 16-bit processors without byte-lane splitting. |
| Read Access Time | 150 ns max - eliminates WAIT states in 6.67 MHz bus cycles (e.g., 80C186 at 16 MHz core). |
| VCC Supply | 5V ±10% - compatible with standard logic rails; no auxiliary voltage required for read mode. |
| Active Current | 35 mA max at 5 MHz - enables low-power operation in embedded controllers with burst-access patterns. |
| Standby Current | 100 µA max - suitable for battery-backed systems where firmware retention must coexist with ultra-low quiescent draw. |
| Programming Speed | 50 µs/word typical - reduces firmware burn time by >90% vs. legacy EPROMs, improving production throughput. |
| ESD Protection | 2,000V HBM - ensures robustness during handling and board assembly in industrial environments. |
Pinout & Package
AT27C2048-15JI is supplied in a 44-lead plastic J-leaded chip carrier (PLCC), JEDEC MS-018 AC compliant, with 1.27 mm lead pitch and body size 16.7 mm × 16.7 mm. Pins 1 and 23 are No Connect (NC) and must remain unconnected per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; TTL/CMOS compatible thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V). |
| O0–O15 | Data Outputs | 16-bit bidirectional output bus; VOH ≥ 2.4V at –400 µA ensures noise margin over 100 pF load in dense PCB layouts. |
| CE | Chip Enable | Active-low primary enable; controls device power state and output drivers; critical for bus arbitration in multi-chip systems. |
| OE | Output Enable | Active-low secondary enable; allows output gating independent of CE, enabling shared-bus timing control. |
| PGM | Program Strobe | Active-low pulse input triggering 50 µs programming cycle; requires precise VPP/VCC sequencing to avoid corruption. |
| VPP | Programming Voltage | 13.0V ±0.25V input during programming only; must be applied after VCC and removed before VCC to prevent latchup. |
| VCC | Power Supply | 5V ±10% for read/standby; raised to 6.5V ±0.25V during programming to support internal charge pumps. |
| GND | Ground | Two dedicated ground pins (pins 22 and 44) - both must be connected to minimize ground bounce in high-speed reads. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with auto-verify loop - cuts firmware update time versus AT27C1024 (10 ms/word) by 200×. |
| Integrated Product Identification Code | Manufacturer ID (001Eh) and Device Code (00F7h) readable via A9=12V and A0 toggle - enables plug-and-play compatibility with Data I/O PS-29/PS-30 programmers. |
| Two-Line Control (CE/OE) | Independent chip and output enables - permits interleaved memory access and eliminates bus contention in multiprocessor designs. |
| Industrial Temperature Range | –40°C to +85°C operation - qualified for use in motor drives, PLCs, and outdoor telecom equipment without derating. |
| JEDEC Standard Packages | 44-lead PLCC (44J) footprint - ensures drop-in replacement for legacy 27C2048 variants and compatibility with existing socket tooling. |
Applications
| Industrial Motor Control Firmware Storage | Medical Diagnostic Equipment Boot ROM |
|---|---|
|
Use Scenario: Stores boot firmware and motion control algorithms in servo drive controllers operating in ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Nonvolatile program memory providing deterministic 150 ns read latency to ensure real-time interrupt response under worst-case thermal conditions. Use Value: Eliminates WAIT states in 16-bit bus interfaces (e.g., TI TMS320F28335 EMIF), reducing instruction fetch overhead by 30% vs. slower EPROMs. |
Use Scenario: Holds calibrated sensor calibration tables and safety-critical boot code in portable ultrasound imaging units. IC Role / Device Role / Timing Role: OTP EPROM ensuring immutable firmware integrity; 2,000V ESD protection prevents field-programming errors during clinical handling. Use Value: Enables traceable, tamper-proof firmware deployment meeting IEC 62304 Class B software requirements without external encryption hardware. |
| Avionics Display System BIOS | Telecom Base Station Configuration Memory |
|
Use Scenario: Stores display initialization routines and font glyphs in ruggedized cockpit multifunction displays exposed to vibration and thermal cycling. IC Role / Device Role / Timing Role: High-reliability OTP memory with 200 mA latchup immunity - withstands transient coupling on shared power rails in MIL-STD-704 avionics power systems. Use Value: Guarantees firmware persistence across 10,000+ power cycles without degradation, exceeding DO-160 Section 22 surge immunity requirements. |
Use Scenario: Retains FPGA configuration bitstreams and RF calibration coefficients in remote radio head units deployed in cellular base stations. IC Role / Device Role / Timing Role: Standby current ≤100 µA enables always-on configuration retention during 4G/5G sleep-mode intervals without battery drain. Use Value: Reduces system-level power budget by 12 mW per unit vs. EEPROM alternatives, critical for fanless outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-15PC | Same die, 40-lead PDIP package (40P6); 600-mil width; no NC pins; higher thermal resistance (θJA = 65°C/W vs. 45°C/W for PLCC). | Suitable for through-hole prototyping and low-volume industrial boards; lacks PLCC's vibration resistance and density. | Select when legacy socket compatibility or manual rework is prioritized over board space and shock tolerance. |
| AT27C2048-15VI | Same die, 40-lead VSOP package (40V); 10 mm × 14 mm footprint; GND pins at corners; no NC pins. | Optimized for space-constrained telecom modules; thinner profile (1.2 mm) but lower creepage distance than PLCC. | Select for high-density SMT production where board area is constrained and thermal management uses copper pour. |
Compared with AT27C2048-15PC and AT27C2048-15VI, the AT27C2048-15JI offers superior mechanical robustness in vibration-prone environments due to its J-lead PLCC construction, while maintaining identical timing, programming, and electrical behavior - making it the preferred choice for industrial automation and transportation electronics.
Availability
AT27C2048-15JI is available at Aetrix Electronics and suitable for industrial motor control, medical diagnostics, avionics displays, and telecom base station applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT27C2048-15JI 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 company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs, acquired by Microchip Technology in 2016.
The AT27C2048-15JI belongs to Atmel's 27C-series OTP EPROM product line, engineered for reliable, high-density firmware storage in industrial and automotive systems where data immutability and long-term retention are mandatory.
FAQ
What is the maximum operating temperature range for the AT27C2048-15JI?
The AT27C2048-15JI is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per JEDEC JESD22-A104 and applies to all DC and AC parameters including read access time (150 ns max), standby current (100 µA max), and output drive capability. Operation outside this range may result in parameter violation or permanent damage.
Does the AT27C2048-15JI require a separate programming voltage during normal read operation?
No, the AT27C2048-15JI operates from a single 5V ±10% supply during read and standby modes. VPP (13.0V ±0.25V) is required only during programming and must be disconnected during read operation. Applying VPP during read may cause excessive current draw or latchup, as specified in the Absolute Maximum Ratings table.
How many address lines does the AT27C2048-15JI have, and what memory depth do they support?
The AT27C2048-15JI has 17 address inputs (A0–A16), supporting 131,072 (217) unique addresses. With its 16-bit data bus, this yields a total capacity of 128K × 16 bits = 2,097,152 bits. This matches the 2-Mbit density stated in the device marking and block diagram.
Can the AT27C2048-15JI be used as a direct replacement for the AT27C1024 in an existing design?
Yes, the AT27C2048-15JI is explicitly documented as a direct upgrade from AT27C1024 (1-Mbit) and AT27C516 (512-Kbit) EPROMs. It shares identical pinouts across all three packages (PDIP, PLCC, VSOP), same VCC and interface logic levels, and backward-compatible control timing - requiring no PCB changes when migrating to higher density.
What is the purpose of the PGM pin on the AT27C2048-15JI, and how is it used?
The PGM pin on the AT27C2048-15JI is an active-low programming strobe that initiates the 50 µs word programming pulse when asserted during valid address/data setup. It must be driven synchronously with VPP = 13.0V and VCC = 6.5V; incorrect timing or voltage sequencing will result in incomplete programming or device failure, as defined in the Rapid™ Programming Algorithm section.
AT27C2048-15JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 150 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT27C2048-15JI FAQ
1.How can I place an order for AT27C2048-15JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-15JI 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 AT27C2048-15JI reliable?
The price and inventory of AT27C2048-15JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-15JI is usually 5 days.
3.What payment methods are accepted for AT27C2048-15JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-15JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-15JI?
AT27C2048-15JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-15JI 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 AT27C2048-15JI?
For technical support, including AT27C2048-15JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-15JI requirements.
6.How does Aetrix verify that AT27C2048-15JI is sourced from the original manufacturer or authorized distributors?
All AT27C2048-15JI 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 AT27C2048-15JI meets industry standards.
7.What is the process for return or replacement of AT27C2048-15JI?
All AT27C2048-15JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-15JI, 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 AT27C2048-15JI part is unused and in its original packaging.
Return procedure for AT27C2048-15JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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