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Microchip Technology AT27C2048-12JI
- Part No.:
- AT27C2048-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C2048-12JI.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,006
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Product details
Overview
AT27C2048-12JI from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM optimized for 16/32-bit microprocessor systems, featuring 120 ns read access time, 5V ±10% supply, 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 AT27C2048-12JI datasheet, AT27C2048-12JI pinout, AT27C2048-12JI application, or AT27C2048-12JI equivalent, key selection criteria include OTP reliability, JEDEC-standard PLCC/PDIP/VSOP package compatibility, dual-line control (CE/OE), and integrated product identification code for automated programming validation.
Technical Context
The AT27C2048-12JI implements a CMOS-based OTP memory architecture with X/Y decoding, output buffers, and dedicated program logic. Its two-line control interface (CE and OE) eliminates bus contention in high-speed systems, while the Rapid™ Programming Algorithm enables deterministic 50 µs/word write cycles with built-in verify-reprogram loops.
It features electrically identifiable manufacturer and device codes via A9 and A0 under VPP = 12.0 V, and supports both TTL- and CMOS-compatible I/O levels. Standby current is specified at ≤100 µA (CMOS mode) with 2,000V ESD protection and 200 mA latchup immunity - critical for industrial firmware storage integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K × 16 organization) - supports full-word parallel access for 16-bit data buses without byte masking overhead |
| Read Access Time | 120 ns max - eliminates WAIT states in 8–10 MHz microprocessor systems using CE/OE-controlled timing |
| Supply Voltage | 5V ±10% - compatible with standard logic rails; VPP = 12.0 V required only during programming |
| Active Current | 35 mA max at 5 MHz - enables stable operation in multi-EPROM embedded systems with shared 5V regulators |
| Standby Current | 100 µA max (CMOS CE mode) - reduces quiescent power in always-on industrial controllers |
| Programming Speed | 50 µs/word typical - cuts firmware update time by >90% vs. legacy EPROMs; includes automatic verify/reprogram up to 10 pulses |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, motor drives, and telecom line cards |
Pinout & Package
AT27C2048-12JI is supplied in a 44-lead plastic J-leaded chip carrier (PLCC), per JEDEC MS-018 AC. Both GND pins must be connected; pins 1 and 23 are No Connect (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A9 used with VH for product ID readout |
| O0–O15 | Data Outputs | True 16-bit bidirectional data path; outputs float when CE or OE is high (high-Z state) |
| CE | Chip Enable | Primary device select; low enables memory access; transitions trigger standby-to-active transients requiring local 0.1 µF decoupling |
| OE | Output Enable | Secondary output gate; low enables O0–O15 drivers; used with CE for bus contention control |
| PGM | Program Strobe | Active-low pulse input for programming; requires precise 47.5–52.5 µs width at VPP = 12.0 V |
| VPP | Programming Voltage | 12.0 V ±0.5 V input during programming; must be applied after and removed before VCC per sequencing rules |
| VCC | Power Supply | 5V ±10% main supply; powers core logic and I/O; supplies 35 mA max in active read mode |
| GND | Ground | Two dedicated ground pins - both must be connected to minimize noise coupling and ensure latchup immunity |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming with auto-verify loop - reduces production programming time and improves yield in firmware burn-in lines |
| Integrated Product Identification Code | Manufacturer ID (001Eh) and Device Code (00F7h) readable via A9/VH and A0 toggle - enables programmer auto-detection and algorithm selection |
| Dual-Line Control (CE/OE) | Independent chip and output enables - allows clean bus sharing in multi-device systems without external gating logic |
| JEDEC-Standard Packages | 44-lead PLCC (44J), 40-lead PDIP (40P6), and 40-lead VSOP (40V) - ensures drop-in replacement across legacy designs and PCB footprints |
| High-Reliability CMOS Process | 2,000V HBM ESD rating and 200 mA latchup immunity - sustains robust operation in noisy factory-floor and motor-control environments |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot ROM |
|---|---|
Use Scenario: Storing immutable boot code and safety-critical configuration in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: OTP EPROM providing non-volatile, tamper-resistant firmware image with guaranteed read stability over 10+ years. Use Value: Eliminates risk of accidental overwrite; 120 ns access time supports real-time scan cycle execution without CPU wait states. |
Use Scenario: Holding certified bootloader and calibration data in Class II medical instruments where firmware integrity is regulated. IC Role / Device Role / Timing Role: Read-only memory with traceable manufacturing ID and ESD-hardened I/O for regulatory audit compliance. Use Value: Integrated product ID enables automated verification during production test; industrial temp range ensures reliability inside sealed enclosures. |
| Telecom Line Card BIOS | Avionics Maintenance Module |
Use Scenario: Storing field-upgradable BIOS and hardware initialization routines on carrier-grade DSLAM and optical line cards. IC Role / Device Role / Timing Role: High-density (128K × 16) EPROM interfacing directly to 16-bit microcontrollers with minimal glue logic. Use Value: By-16 organization matches common bus widths; 5V supply simplifies power design alongside other logic ICs. |
Use Scenario: Providing mission-critical diagnostic firmware in airborne maintenance computers operating in wide-temperature avionics bays. IC Role / Device Role / Timing Role: Industrial-grade OTP memory with –40°C to +85°C operation and 200 mA latchup immunity for fault-tolerant systems. Use Value: Guaranteed data retention >20 years; rapid programming enables efficient post-manufacturing firmware loading in certified repair facilities. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C1024-12JI | 1-Mbit (64K × 16), same package and timing; lacks integrated ID code and Rapid™ programming | Lower density; suitable for legacy designs with <128K firmware images | Select when firmware size fits 64K × 16 and ID code verification is not required |
| MX27C2048PC-12 | Pin-compatible 2-Mbit OTP EPROM; 120 ns access, but no integrated ID code and higher standby current (200 µA) | Same footprint and function; used in cost-sensitive industrial boards where ID code is unused | Choose for second-source availability where Atmel-specific programming features are unnecessary |
Compared with AT27C2048-12JI, AT27C1024-12JI offers lower density and no Rapid™ programming, while MX27C2048PC-12 provides identical capacity and speed but omits the integrated ID code and has higher standby current - impacting long-term power budget in battery-backed systems.
Availability
AT27C2048-12JI is available at Aetrix Electronics and suitable for industrial PLCs, medical device boot ROMs, and telecom line card BIOS requiring stable component supply, long-lifecycle support, and verified OTP reliability.
Supply support for AT27C2048-12JI 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, non-volatile memory, and security ICs for industrial and embedded markets.
The AT27C2048 product line was designed for high-reliability, field-programmable firmware storage in industrial control, telecom infrastructure, and safety-critical systems where data integrity and long-term retention are mandatory.
FAQ
What is the maximum read access time specification for AT27C2048-12JI?
The AT27C2048-12JI has a maximum read access time (tACC) of 120 ns under industrial temperature conditions (–40°C to +85°C) and 5V ±10% supply. This value is guaranteed across all operating modes when CE and OE are both asserted low, and it reflects the worst-case delay from valid address to stable data on O0–O15 outputs.
Does AT27C2048-12JI support in-system programming?
No, AT27C2048-12JI does not support in-system programming. It requires a dedicated EPROM programmer applying 12.0 V to VPP and precise 47.5–52.5 µs PGM pulses. The device lacks serial interfaces or internal voltage charge pumps, and programming must occur in a socketed or fixture-mounted environment outside the target system.
What is the purpose of the Integrated Product Identification Code in AT27C2048-12JI?
The Integrated Product Identification Code in AT27C2048-12JI provides two electronically readable words: Manufacturer ID (001Eh) and Device Code (00F7h). Accessed by setting A9 to 12.0 V and toggling A0, it enables automated programmers to validate part identity and select correct algorithms - reducing misprogramming risk in high-volume firmware loading.
Can AT27C2048-12JI operate with a 3.3V supply?
No, AT27C2048-12JI requires a 5V ±10% supply (4.5V to 5.5V) for both read and programming operations. Its inputs and outputs are TTL/CMOS compatible at 5V levels, and VPP must be 12.0 V ±0.5 V during programming. Using 3.3V will result in undefined behavior, failed reads, and inability to enter programming mode.
How many ground pins does AT27C2048-12JI have, and why are both required?
AT27C2048-12JI has two dedicated GND pins (pins 23 and 44 in PLCC package). Both must be connected to the system ground plane to ensure low-impedance return paths, minimize switching noise coupling, and maintain the specified 200 mA latchup immunity. Leaving either unconnected risks signal integrity degradation and potential device failure under transient conditions.
AT27C2048-12JI 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:
- 120 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)
AT27C2048-12JI FAQ
1.How can I place an order for AT27C2048-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-12JI 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 AT27C2048-12JI reliable?
The price and inventory of AT27C2048-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-12JI is usually 5 days.
3.What payment methods are accepted for AT27C2048-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-12JI?
AT27C2048-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-12JI 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 AT27C2048-12JI?
For technical support, including AT27C2048-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-12JI requirements.
6.How does Aetrix verify that AT27C2048-12JI is sourced from the original manufacturer or authorized distributors?
All AT27C2048-12JI 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 AT27C2048-12JI meets industry standards.
7.What is the process for return or replacement of AT27C2048-12JI?
All AT27C2048-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-12JI, 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 AT27C2048-12JI part is unused and in its original packaging.
Return procedure for AT27C2048-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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