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Microchip Technology AT27C2048-90PC
- Part No.:
- AT27C2048-90PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C2048-90PC.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
AT27C2048-90PC from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM with 55 ns read access time, 5V ±10% supply, and JEDEC-standard 40-lead PDIP package. It serves as nonvolatile program storage in 16/32-bit microprocessor systems, enabling fast firmware access without wait states in industrial control and embedded boot applications.
For engineers reviewing the AT27C2048-90PC datasheet, AT27C2048-90PC pinout, AT27C2048-90PC application, or AT27C2048-90PC equivalent, key selection criteria include its -90 speed grade (90 ns max tACC), CMOS/TTL compatibility, Rapid™ programming at 50 µs/word, 100 µA max standby current, and dual-line CE/OE control for bus contention avoidance.
Technical Context
The AT27C2048-90PC implements a 128K × 16 bit organization with full address decoding (A0–A16), two-line enable logic (CE and OE), and integrated product identification code accessible via A9 and A0. Its Rapid™ programming algorithm uses 50 µs CE pulses at VCC = 6.5V and VPP = 13.0V, with up to 10 reprogramming attempts per word.
It operates in five distinct modes-Read, Output Disable, Standby, Rapid Program, and PGM Verify-controlled by CE, OE, and PGM signals. The device features 2,000V ESD protection, 200 mA latchup immunity, and requires decoupling with 0.1 µF ceramic + 4.7 µF bulk capacitors on VCC–GND per system design guidelines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K words × 16 bits); supports 16-bit data bus interface in high-performance microprocessor systems. |
| Read Access Time | 90 ns maximum (tACC); ensures no WAIT states required for 5 MHz bus operation in real-time embedded firmware execution. |
| Supply Voltage | 5V ±10%; compatible with standard TTL/CMOS logic rails and eliminates need for auxiliary voltage regulators. |
| Standby Current | 100 µA maximum (ISB1); enables low-power retention in battery-backed or energy-sensitive industrial modules. |
| Active Current | 35 mA maximum at 5 MHz (ICC); defines thermal budget and PCB trace sizing for sustained read operations. |
| Programming Speed | 50 µs/word typical (Rapid™ algorithm); reduces firmware update cycle time during manufacturing programming. |
| ESD Protection | 2,000V HBM; meets industrial handling requirements without additional external protection circuitry. |
Pinout & Package
AT27C2048-90PC is supplied in a 40-lead, 0.600" wide plastic dual inline package (PDIP), JEDEC MS-011 AC compliant, with 0.100" lead pitch and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0 least significant, A16 most significant. |
| O0–O15 | Data Outputs | 16-bit bidirectional data bus; outputs driven only when CE = VIL and OE = VIL (read mode). |
| CE | Chip Enable | Primary chip select; device active only when CE = VIL; controls power state transition between active and standby. |
| OE | Output Enable | Secondary output gate; enables data drivers only when OE = VIL, allowing bus sharing without contention. |
| PGM | Program Strobe | Active-low signal initiating programming pulse; must be VIL during Rapid™ programming with VPP = 13.0V. |
| VPP | Programming Voltage | 13.0V ±0.25V input during programming; must be applied after and removed before VCC per sequencing requirement. |
| VCC | Power Supply | 5V ±10% main supply; powers logic and outputs; supplies 35 mA max during active read at 5 MHz. |
| GND | Ground | Two dedicated ground pins (pins 12 and 39 in PDIP); both must be connected to minimize noise and ensure latchup immunity. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-standard PDIP packaging | 40-lead 0.600" wide DIP footprint ensures drop-in replacement for legacy EPROMs and compatibility with standard socketing and wave solder processes. |
| Two-line control (CE/OE) | Eliminates bus contention in multi-device systems by enabling independent output gating and chip selection timing. |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F7h) readable via A9/VH and A0 toggle; enables automated programming equipment recognition. |
| Rapid™ Programming Algorithm | Guarantees reliable 50 µs/word programming with verification loop and up to 10 retries per word, reducing production programming time. |
| CMOS/TTL I/O compatibility | Input thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V) and output drive (VOL ≤ 0.4V, VOH ≥ 2.4V) support direct interfacing with both logic families without level shifters. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Boot ROM |
|---|---|
|
Use Scenario: Storing fixed ladder logic and I/O configuration in programmable logic controllers operating in harsh factory environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Nonvolatile program memory providing deterministic 90 ns read access to boot code and runtime firmware without disk latency. Use Value: Enables deterministic startup and real-time scan cycles; 100 µA standby current supports low-power sleep modes between scans. |
Use Scenario: Replacing obsolete 1M-bit EPROMs in legacy 16-bit embedded systems requiring field-upgradable but write-once firmware. IC Role / Device Role / Timing Role: OTP EPROM acting as primary boot ROM, directly mapped into CPU address space with A0–A16 decoded. Use Value: Direct upgrade path from AT27C1024; same pinout and interface simplifies redesign while doubling capacity to 128K × 16. |
| Automotive Engine Control Unit (ECU) Calibration Data | Test Equipment Microcode Storage |
|
Use Scenario: Holding calibrated lookup tables and trim parameters in automotive ECUs where reprogramming is performed only during service. IC Role / Device Role / Timing Role: Read-only calibration memory accessed during engine initialization and closed-loop control loops. Use Value: High-reliability CMOS process with 200 mA latchup immunity withstands automotive electrical transients; 2,000V ESD protects during assembly. |
Use Scenario: Storing instrument microcode and self-test routines in benchtop test equipment requiring guaranteed firmware integrity over 10+ year lifecycles. IC Role / Device Role / Timing Role: Immutable firmware store accessed during power-on self-test (POST) and runtime instruction fetch. Use Value: One-time programmability prevents accidental corruption; Rapid™ programming enables efficient factory loading of unique calibration firmware per unit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-90JI | Same die, industrial temperature range (-40°C to +85°C) vs. commercial (0°C to +70°C) for AT27C2048-90PC. | Required for extended-temperature deployments; identical timing, programming, and pinout. | Select AT27C2048-90JI when operating ambient exceeds 70°C or requires industrial qualification. |
| AT27C1024-90PC | 1-Mbit (64K × 16) density, otherwise identical speed grade, package, and interface; lacks A16 address line. | Suitable only where 64K-word capacity suffices; not a capacity upgrade path. | Choose AT27C1024-90PC only for cost-sensitive designs with verified 64K firmware footprint. |
Compared with AT27C2048-90PC, AT27C2048-90JI offers identical functionality with extended temperature tolerance, while AT27C1024-90PC provides half the memory capacity at lower cost but cannot replace AT27C2048-90PC in 128K firmware applications.
Availability
AT27C2048-90PC is available at Aetrix Electronics and suitable for industrial control systems, legacy embedded boot applications, and automotive calibration storage requiring stable component supply across long production lifecycles.
Supply support for AT27C2048-90PC 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 manufacturer specializing in microcontrollers, nonvolatile memory, and programmable logic devices before its acquisition by Microchip Technology in 2016.
The AT27C2048 belongs to Atmel's OTP EPROM product line, designed specifically for reliable, low-cost, one-time firmware storage in industrial, automotive, and legacy computing systems where EEPROM endurance or Flash reprogrammability is unnecessary.
FAQ
What is the maximum read access time specified for AT27C2048-90PC?
The AT27C2048-90PC has a maximum read access time (tACC) of 90 ns under commercial temperature conditions (0°C to +70°C) with VCC = 5V ±10%. This value is guaranteed across all operating voltages and loads specified in the datasheet, and it defines the worst-case delay from valid address and CE/OE assertion to stable output data. The -90 suffix explicitly denotes this speed grade.
Does AT27C2048-90PC support in-system programming?
No, AT27C2048-90PC does not support in-system programming. It requires a dedicated EPROM programmer applying 13.0V to VPP and 6.5V to VCC during the Rapid™ programming sequence. The device must be removed from the target board for programming, as VPP is not compatible with standard 5V system rails and the PGM signal requires precise timing control unavailable in most embedded systems.
What package type is used for AT27C2048-90PC?
AT27C2048-90PC uses a 40-lead, 0.600" wide plastic dual inline package (PDIP), designated as package code 40P6 per Atmel's ordering information. This JEDEC MS-011 AC compliant package features through-hole leads, 0.100" pitch, and is intended for socketed or wave-soldered applications in industrial and legacy designs.
Can AT27C2048-90PC be used as a direct replacement for AT27C1024-90PC?
AT27C2048-90PC is not a pin-compatible drop-in replacement for AT27C1024-90PC due to the addition of the A16 address pin and corresponding layout changes. While both share the same 40-lead PDIP package and speed grade, AT27C2048-90PC requires connection of A16 and accommodates a larger address space; system address decoding must be updated to use A16.
What decoupling capacitance is required for stable operation of AT27C2048-90PC?
Per Atmel's system considerations, AT27C2048-90PC requires a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND as close to the device as possible, plus a 4.7 µF bulk electrolytic capacitor near the power supply entry point for arrays. These values prevent transient excursions during CE switching and ensure stable VCC regulation during active read and standby transitions.
AT27C2048-90PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- 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:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 40-PDIP
AT27C2048-90PC FAQ
1.How can I place an order for AT27C2048-90PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-90PC 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 AT27C2048-90PC reliable?
The price and inventory of AT27C2048-90PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-90PC is usually 5 days.
3.What payment methods are accepted for AT27C2048-90PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-90PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-90PC?
AT27C2048-90PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-90PC 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 AT27C2048-90PC?
For technical support, including AT27C2048-90PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-90PC requirements.
6.How does Aetrix verify that AT27C2048-90PC is sourced from the original manufacturer or authorized distributors?
All AT27C2048-90PC 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 AT27C2048-90PC meets industry standards.
7.What is the process for return or replacement of AT27C2048-90PC?
All AT27C2048-90PC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-90PC, 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 AT27C2048-90PC part is unused and in its original packaging.
Return procedure for AT27C2048-90PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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