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Microchip Technology AT27C2048-15JC
- Part No.:
- AT27C2048-15JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
AT27C2048-15JC.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,499
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Product details
Overview
AT27C2048-15JC from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM with 150 ns maximum read access time, 5V ±10% supply, and JEDEC-standard 44-lead PLCC packaging. It serves as nonvolatile program storage in 16/32-bit microprocessor systems, supports rapid programming at 50 µs/word, and operates across commercial temperature range (0°C to 70°C).
For engineers reviewing the AT27C2048-15JC datasheet, AT27C2048-15JC pinout, AT27C2048-15JC application, or AT27C2048-15JC equivalent, key selection considerations include its 128K × 16 organization, dual-line control (CE/OE), 100 µA max standby current, and compatibility with legacy AT27C516/AT27C1024 firmware upgrades.
Technical Context
The AT27C2048-15JC implements a CMOS-based OTP EPROM architecture with X/Y decoding, output buffers, and integrated product identification logic. Its two-line enable scheme (CE and OE) enables bus contention avoidance in high-speed systems, and the Rapid™ programming algorithm uses precise 50 µs CE pulses at VCC = 6.5 V and VPP = 13.0 V for reliable word-level programming.
It features electrically identifiable manufacturer and device codes via A9 and A0 under elevated VPP, supports TTL/CMOS-compatible I/O levels, and requires decoupling with 0.1 µF ceramic + 4.7 µF bulk capacitors per device to suppress transient excursions during CE switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K words × 16 bits) - supports full 16-bit data bus interfacing without byte-lane splitting |
| Read Access Time | 150 ns max - eliminates WAIT states in 6.67 MHz CPU systems (tACC ≤ 150 ns) |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails; VPP = 13.0 V required only during programming |
| Standby Current | 100 µA max - enables low-power retention in battery-backed or intermittent-read embedded systems |
| Active Current | 35 mA max at 5 MHz - defines thermal budget for dense EPROM arrays on PCBs |
| Programming Speed | 50 µs/word typical - reduces firmware burn time by >90% vs. legacy EPROMs using slower algorithms |
| ESD Protection | 2,000V HBM - ensures robustness during manual handling and board assembly |
Pinout & Package
AT27C2048-15JC 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 location index |
| O0–O15 | Data Outputs | 16-bit bidirectional data bus outputs; high-impedance when CE or OE inactive |
| CE | Chip Enable | Primary device select; active-low; controls power state transition between standby and active modes |
| OE | Output Enable | Secondary output gate; active-low; allows shared bus operation without disabling entire chip |
| PGM | Program Strobe | Active-low pulse input that initiates programming cycle when CE = VIL and VPP = 13.0 V |
| VPP | Programming Voltage | 13.0 V ±0.25 V input required only during programming; must be applied after and removed before VCC |
| VCC | Power Supply | 5V ±10% main supply; powers all logic and output drivers during read and programming modes |
| GND | Ground | Two dedicated ground pins (pins 22 and 44); both must be connected to minimize noise and ensure latchup immunity |
| NC | No Connect | Pins 1 and 23 - physically present but internally unconnected; must float or be left unpopulated |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | Enables verified 50 µs/word programming - cuts firmware update time versus conventional EPROMs requiring ms-level pulses |
| Integrated Product Identification Code | Provides electronic manufacturer ID (001Eh) and device code (00F7h) via A9/VH and A0 toggling - ensures correct algorithm selection in automated programmers |
| Two-Line Control (CE/OE) | Eliminates bus contention in multi-device systems - OE can be strobed independently while CE remains asserted |
| CMOS/TTL-Compatible I/O | Accepts and drives standard logic thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) - interoperable with 5V microcontrollers and FPGAs without level shifters |
| High Reliability Design | 200 mA latchup immunity and 2,000 V ESD protection - suitable for industrial environments with noisy power and handling variability |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot ROM |
|---|---|
|
Use Scenario: Storing fixed ladder logic and I/O mapping firmware in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile boot-time instruction storage accessed by 16-bit microcontroller at power-on reset. Use Value: 150 ns access time ensures deterministic boot within 200 µs; OTP nature prevents accidental corruption during field operation. |
Use Scenario: Replacing obsolete EPROMs in medical diagnostic equipment where firmware updates occur infrequently but reliability is critical. IC Role / Device Role / Timing Role: Read-only program memory holding real-time OS kernel and hardware abstraction layer. Use Value: Direct upgrade path from AT27C1024 preserves PCB layout; 100 µA standby current extends battery backup duration. |
| Avionics Maintenance Terminal BIOS | Test Equipment Calibration Data Storage |
|
Use Scenario: Holding immutable BIOS and self-test routines in portable avionics ground support equipment operating across 0°C–70°C. IC Role / Device Role / Timing Role: Secure, tamper-resistant firmware repository accessed during cold start and built-in test sequences. Use Value: Integrated ID code enables automated verification during calibration; 2,000 V ESD rating withstands static-prone hangar environments. |
Use Scenario: Storing factory-calibrated coefficients and sensor compensation tables in benchtop oscilloscopes and signal analyzers. IC Role / Device Role / Timing Role: Static configuration memory mapped into microcontroller address space for runtime coefficient lookup. Use Value: 128K × 16 organization accommodates >2000 16-bit calibration points; rapid programming enables efficient post-calibration burn-in. |
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 (0.600" width); no NC pins; through-hole mounting | Preferred for prototyping, manual rework, or legacy wave-soldered boards | Select when mechanical compatibility with existing DIP footprints or hand-soldering capability is required |
| AT27C2048-15VC | Same die, 40-lead VSOP package (10 mm × 14 mm); surface-mount; thinner profile than PLCC | Suitable for space-constrained designs where PLCC height exceeds stack-up limits | Select when board area is constrained and reflow soldering infrastructure is available |
Compared with AT27C2048-15PC and AT27C2048-15VC, the AT27C2048-15JC offers superior thermal dissipation via J-lead geometry and standardized PLCC socket compatibility, making it optimal for production-reliable, serviceable, and thermally demanding industrial deployments.
Availability
AT27C2048-15JC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot ROM, and avionics maintenance terminal BIOS requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AT27C2048-15JC 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 firmware integrity, field-programmability, and drop-in replacement of earlier EPROM generations in industrial and embedded computing systems.
FAQ
What is the maximum read access time specified for the AT27C2048-15JC?
The AT27C2048-15JC has a maximum read access time (tACC) of 150 ns under commercial temperature conditions (0°C to 70°C) with VCC = 5V ±10%. This value is guaranteed across all operating corners and is measured from address valid to valid data output with CE and OE both asserted low. The AT27C2048-15JC achieves this timing without external WAIT-state generation, enabling direct interface with 6.67 MHz bus clocks.
Does the AT27C2048-15JC require a programming voltage other than VCC?
Yes, the AT27C2048-15JC requires VPP = 13.0 V ±0.25 V during programming, supplied separately from VCC. VCC must be raised to 6.5 V ±0.25 V concurrently. VPP must be applied after and removed before VCC to prevent device damage. During normal read operation, VPP is tied to VCC (5 V), and the AT27C2048-15JC draws only standby or active current from the 5 V rail.
How many address and data pins does the AT27C2048-15JC have?
The AT27C2048-15JC has 17 address inputs (A0–A16) and 16 bidirectional data outputs (O0–O15). These correspond directly to its 128K × 16 organization: 217 = 131,072 addresses × 16 bits = 2,097,152 total bits. Address lines A0–A16 are dedicated inputs; O0–O15 are true outputs in read mode and high-impedance when CE or OE is inactive.
Is the AT27C2048-15JC pin-compatible with earlier Atmel EPROMs like the AT27C1024?
No, the AT27C2048-15JC is not pin-compatible with the AT27C1024 due to increased address depth (A0–A16 vs. A0–A15) and expanded data bus (16-bit vs. 8-bit). However, it is a functional upgrade: the AT27C2048-15JC supports the same control signals (CE, OE, PGM), voltage levels, and programming methodology, allowing firmware migration with minimal software changes and board redesign.
What decoupling capacitance is recommended for stable operation of the AT27C2048-15JC?
Atmel specifies a minimum 0.1 µF high-frequency ceramic capacitor between VCC and GND, placed as close as possible to the AT27C2048-15JC pins. For systems with multiple AT27C2048-15JC devices or large EPROM arrays, a 4.7 µF bulk electrolytic capacitor should also be added near the power entry point. This dual-capacitor strategy suppresses transients caused by CE switching and maintains VCC stability within datasheet limits.
AT27C2048-15JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.6x16.6)
AT27C2048-15JC FAQ
1.How can I place an order for AT27C2048-15JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-15JC 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 AT27C2048-15JC reliable?
The price and inventory of AT27C2048-15JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-15JC is usually 5 days.
3.What payment methods are accepted for AT27C2048-15JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-15JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-15JC?
AT27C2048-15JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-15JC 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 AT27C2048-15JC?
For technical support, including AT27C2048-15JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-15JC requirements.
6.How does Aetrix verify that AT27C2048-15JC is sourced from the original manufacturer or authorized distributors?
All AT27C2048-15JC 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 AT27C2048-15JC meets industry standards.
7.What is the process for return or replacement of AT27C2048-15JC?
All AT27C2048-15JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-15JC, 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 AT27C2048-15JC part is unused and in its original packaging.
Return procedure for AT27C2048-15JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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