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Microchip Technology AT27C2048-55JC
- Part No.:
- AT27C2048-55JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C2048-55JC.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,353
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Product details
Overview
AT27C2048-55JC from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM with 55 ns read access time, 5V ±10% supply, and JEDEC-standard 44-lead PLCC package. It serves as nonvolatile firmware storage in 16/32-bit microprocessor systems, enabling direct replacement of AT27C516 and AT27C1024 without WAIT states.
For engineers reviewing the AT27C2048-55JC datasheet, AT27C2048-55JC pinout, AT27C2048-55JC application, or AT27C2048-55JC equivalent, key selection criteria include fast 55 ns read timing, dual-line CE/OE control for bus contention avoidance, Rapid™ programming at 50 µs/word, 12.0 V product identification voltage on A9, and industrial temperature support (-40°C to +85°C).
Technical Context
The AT27C2048-55JC implements a two-line control architecture (CE and OE) to isolate outputs during bus sharing, supporting high-speed system integration without external gating logic. Its 128K × 16 organization delivers 16-bit parallel data output per address cycle, optimized for 16-bit data bus microcontrollers and DSPs.
It uses CMOS process technology with 2,000V ESD protection and 200 mA latchup immunity, and supports both TTL- and CMOS-compatible I/O levels. Programming requires VPP = 13.0 V ±0.25 V and VCC = 6.5 V ±0.25 V, with verification performed after each 50 µs pulse in the Rapid™ algorithm.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K words × 16 bits) - enables full firmware image storage for mid-complexity embedded controllers. |
| Read Access Time | 55 ns maximum - eliminates WAIT states in 5 MHz microprocessor systems. |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails without regulation overhead. |
| Active Current | 35 mA max at 5 MHz - defines power budget for sustained read operations in real-time systems. |
| Standby Current | 100 µA maximum - supports low-power sleep modes in battery-backed or energy-sensitive designs. |
| Programming Voltage | VPP = 13.0 V ±0.25 V - requires dedicated programming supply; not compatible with standard 5V-only systems. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade deployment in factory automation and motor control. |
Pinout & Package
AT27C2048-55JC 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0–A16 directly map to memory locations. |
| O0–O15 | Data Outputs | 16-bit bidirectional data bus; outputs driven only when CE = VIL and OE = VIL. |
| CE | Chip Enable | Primary device select; controls power state transition between active and standby; transient-sensitive. |
| OE | Output Enable | Secondary output gate; allows bus sharing without disabling chip power; tOE = 20 ns max. |
| PGM | Program Strobe | Active-low signal initiating 50 µs programming pulse; requires precise VPP/VCC sequencing. |
| VPP | Programming Voltage | 13.0 V input for programming; must be applied after and removed before VCC to prevent damage. |
| VCC | Power Supply | 5V ±10% main supply; powers logic and outputs; decoupling with 0.1 µF ceramic capacitor required. |
| GND | Ground | Two dedicated ground pins (pins 22 and 44); both must be connected to minimize noise and ensure latchup immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with automatic verify-reprogram loop - reduces production programming cycle time by >70% vs legacy EPROMs. |
| Integrated Product Identification Code | Manufacturer ID (001Eh) and Device Code (00F7h) readable via A9 = 12.0 V and A0 toggle - enables auto-detection in universal programmers. |
| Two-Line Control (CE/OE) | Independent chip and output enable - eliminates bus contention in multi-device systems without external logic. |
| High-Reliability CMOS Process | 2,000V HBM ESD rating and 200 mA latchup immunity - ensures robustness in manufacturing handling and field operation. |
| JEDEC-Standard Packages | 44-lead PLCC (44J) footprint - supports drop-in compatibility with existing PLCC sockets and reflow/reflow-soldering processes. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot ROM |
|---|---|
Use Scenario: Storing fixed boot code and safety-critical configuration in programmable logic controllers deployed in factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile firmware ROM providing deterministic 55 ns read access to initialize CPU and I/O peripherals at power-up. Use Value: Industrial temperature rating (-40°C to +85°C) and 200 mA latchup immunity ensure reliable operation under harsh EMI and thermal stress. |
Use Scenario: Holding certified bootloader and calibration tables in Class II medical instruments requiring traceable, unalterable firmware. IC Role / Device Role / Timing Role: OTP EPROM used as immutable boot source; prevents unauthorized runtime modification of critical startup sequences. Use Value: One-time programmability guarantees firmware integrity; integrated ID code enables automated verification during production test. |
| Automotive Engine Control Module | Legacy Industrial HMI Controller |
Use Scenario: Storing engine mapping tables and diagnostic routines in pre-OBD-II automotive ECUs where EEPROM endurance was insufficient. IC Role / Device Role / Timing Role: High-density (128K × 16) read-only memory interfaced directly to 16-bit MCUs like Intel 80C188EB. Use Value: 55 ns access time matches CPU bus timing without wait-state insertion; 5V supply simplifies power design versus mixed-voltage alternatives. |
Use Scenario: Replacing obsolete 512K-bit EPROMs in aging human-machine interface controllers running fixed ladder logic interpreters. IC Role / Device Role / Timing Role: Pin-compatible upgrade path from AT27C516/AT27C1024 with identical PLCC-44 footprint and CE/OE control protocol. Use Value: Direct upgrade capability avoids PCB redesign; same 40-pin-compatible PLCC-44 package enables field retrofit without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-55PC | Same die, 40-lead PDIP package (40P6); no NC pins; larger footprint (24.1 mm × 6.9 mm). | Preferred for through-hole prototyping or legacy board repair where PLCC socketing is unavailable. | Select when mechanical compatibility with DIP sockets or wave-solder assembly is required. |
| AT27C2048-55VI | Same die, 40-lead VSOP package (40V); 10 mm × 14 mm body; thinner profile than PLCC. | Suitable for space-constrained industrial modules where height clearance limits PLCC use. | Select when board area and Z-height are constrained but PLCC rework is impractical. |
Compared with AT27C2048-55PC and AT27C2048-55VI, the AT27C2048-55JC offers optimal balance of reworkability (PLCC socket support), industrial temperature range, and standard JEDEC footprint-making it the preferred choice for new industrial control designs requiring field-programmable firmware storage.
Availability
AT27C2048-55JC is available at Aetrix Electronics and suitable for industrial PLCs, medical device boot systems, and automotive engine control modules requiring stable component supply across extended lifecycle windows.
Supply support for AT27C2048-55JC 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 semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.
The AT27C2048 belongs to Atmel's OTP EPROM product line, designed specifically for cost-sensitive, high-reliability embedded systems requiring unalterable firmware storage with industrial-grade environmental tolerance.
FAQ
What is the maximum operating temperature range for AT27C2048-55JC?
The AT27C2048-55JC is rated for industrial operation from -40°C to +85°C. This range is validated per the datasheet's "Ordering Information" table, where the "I" suffix denotes industrial temperature grade. The device meets all DC and AC specifications across this full range, including 55 ns access time and 100 µA standby current. AT27C2048-55JC maintains functionality without derating in factory-floor or outdoor-mounted equipment.
Does AT27C2048-55JC require a separate programming voltage during normal operation?
No. AT27C2048-55JC operates from a single 5V ±10% supply (VCC) during read mode. VPP = 13.0 V is required only during programming and must be disconnected or lowered to 5.0 V for read operation. The datasheet explicitly states that VPP may be tied to VCC except during programming, and applying 13 V during read will damage the device. AT27C2048-55JC's read-mode power architecture eliminates need for dual-rail supplies in host systems.
How many address lines does AT27C2048-55JC have, and what is their function?
AT27C2048-55JC has 17 address inputs: A0 through A16. These lines select one of 131,072 (128K) 16-bit words in the memory array. A0 is the least significant bit; A16 is the most significant. The datasheet's pin configuration diagram and block diagram confirm all 17 lines connect directly to internal X/Y decoders. AT27C2048-55JC does not use A17 - its 2-Mbit capacity is fully addressed by A0–A16.
Is AT27C2048-55JC pin-compatible with AT27C1024 or AT27C516?
AT27C2048-55JC is a direct upgrade from AT27C1024 and AT27C516 in the same PLCC-44 package, but not pin-compatible due to expanded address bus (A15/A16 added) and PGM/VPP signals. The datasheet states "Direct Upgrade" - meaning same footprint and control logic (CE/OE), but additional pins repurpose former NC or GND locations. AT27C2048-55JC requires updated PCB layout versus older variants.
What decoupling capacitance is required for stable operation of AT27C2048-55JC?
Per the "System Considerations" section, AT27C2048-55JC requires a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close as possible to the device. For arrays of multiple devices, a 4.7 µF bulk electrolytic capacitor is also recommended near the power entry point. These values are mandatory to suppress transients induced by CE switching; omitting them risks violating absolute maximum ratings and causing non-conformance. AT27C2048-55JC's reliability depends on this decoupling implementation.
AT27C2048-55JC 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:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT27C2048-55JC FAQ
1.How can I place an order for AT27C2048-55JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-55JC 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 AT27C2048-55JC reliable?
The price and inventory of AT27C2048-55JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-55JC is usually 5 days.
3.What payment methods are accepted for AT27C2048-55JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-55JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-55JC?
AT27C2048-55JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-55JC 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 AT27C2048-55JC?
For technical support, including AT27C2048-55JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-55JC requirements.
6.How does Aetrix verify that AT27C2048-55JC is sourced from the original manufacturer or authorized distributors?
All AT27C2048-55JC 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 AT27C2048-55JC meets industry standards.
7.What is the process for return or replacement of AT27C2048-55JC?
All AT27C2048-55JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-55JC, 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 AT27C2048-55JC part is unused and in its original packaging.
Return procedure for AT27C2048-55JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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