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Microchip Technology AT27C2048-55PC
- Part No.:
- AT27C2048-55PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
AT27C2048-55PC.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,245
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Product details
Overview
AT27C2048-55PC from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM optimized for high-performance 16/32-bit microprocessor systems. It delivers 55 ns read access time, operates on a single 5V ±10% supply, and supports JEDEC-standard 40-lead PDIP packaging. Its dual-line control (CE/OE), CMOS/TTL compatibility, and Rapid™ programming (50 µs/word) make it suitable for firmware storage in embedded controllers and industrial boot memory.
For engineers reviewing the AT27C2048-55PC datasheet, AT27C2048-55PC pinout, AT27C2048-55PC application, or AT27C2048-55PC equivalent, key selection criteria include verified 55 ns tACC timing, 100 µA max standby current, 35 mA active current at 5 MHz, VPP = 12.0 V programming voltage, and compatibility with legacy AT27C516/AT27C1024 designs.
Technical Context
The AT27C2048-55PC implements a 128K × 16 OTP EPROM architecture with full address decoding (A0–A16), 16-bit bidirectional data outputs (O0–O15), and two independent enable controls (CE, OE) to prevent bus contention. Its 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 integrated product identification (via A9/VH and A0 toggling), 2,000V ESD protection, 200 mA latchup immunity, and supports both commercial (0°C to 70°C) and industrial (−40°C to 85°C) temperature ranges. The device requires no external WAIT states due to sub-55 ns access latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K × 16) - enables full firmware image storage for 16-bit MCUs without banking |
| Read Access Time | 55 ns maximum - eliminates WAIT states in 16/32-bit bus cycles up to ~18 MHz |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary supplies needed |
| Standby Current | 100 µA maximum - ensures low power consumption during system sleep or idle modes |
| Active Current | 35 mA maximum at 5 MHz - supports sustained burst reads in real-time control applications |
| Programming Voltage | VPP = 12.0 ±0.5 V - requires dedicated programming hardware; not 5V-only programmable |
| ESD Protection | 2,000V HBM - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
AT27C2048-55PC is packaged in a 40-lead, 0.600" wide plastic dual inline package (PDIP), per JEDEC MS-011 AC. All pins are electrically defined; both GND pins (pins 12 and 32) must be connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; TTL/CMOS compatible |
| O0–O15 | Data Outputs | 16-bit parallel output bus; drives standard TTL loads (IOL = 2.1 mA, VOL ≤ 0.4 V) |
| CE | Chip Enable | Active-low global enable; controls device activation and standby entry (VIH > 2.0 V disables outputs) |
| OE | Output Enable | Active-low output gate; allows shared bus operation without contention when CE is asserted |
| PGM | Program Strobe | Active-low pulse input for programming; requires precise 50 µs width at VPP = 13.0 V |
| VPP | Programming Voltage | 12.0 V input during programming only; must be applied after and removed before VCC |
| VCC | Power Supply | +5V ±10% main supply; powers read and standby modes; supplies 35 mA max at 5 MHz |
| GND | Ground | Two dedicated ground pins (12, 32); both required for stable operation and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time - reduces firmware update cycle time by >90% vs. legacy EPROMs |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F7h) accessible via A9/A0 - enables auto-detection in universal programmers |
| Two-Line Control Architecture | Independent CE and OE inputs - permits flexible bus arbitration and eliminates output conflicts in multi-device systems |
| JEDEC-Standard Packaging | 40P6 PDIP footprint - ensures drop-in replacement for AT27C516 and AT27C1024 in existing PCB layouts |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2,000V ESD rating - sustains operation in noisy industrial environments |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot ROM |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O configuration in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 55 ns instruction fetch timing for real-time scan cycles. Use Value: Eliminates reliance on slower serial EEPROM or flash, ensuring <100 ns worst-case instruction latency critical for 1 ms scan intervals. |
Use Scenario: Replacing obsolete EPROMs in legacy medical diagnostic equipment requiring field-upgradable but unalterable firmware. IC Role / Device Role / Timing Role: OTP firmware repository accessed directly by Z80 or 80C188 CPU during cold start. Use Value: Direct 16-bit bus interface and 5V-only read operation avoid level-shifting, preserving original board signal integrity. |
| Military Avionics Configuration Memory | Test Equipment Calibration Data Storage |
Use Scenario: Holding immutable flight control parameter tables in airborne mission computers operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Radiation-tolerant OTP memory delivering guaranteed 55 ns access under thermal stress and vibration. Use Value: Industrial temp grade and 2,000V ESD rating meet DO-160 Section 22 lightning-induced transient requirements. |
Use Scenario: Storing factory-calibrated ADC/DAC coefficients and sensor linearization tables in automated test systems. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage accessed once per power-on for self-calibration routines. Use Value: One-time programmability prevents accidental overwrites during field service, ensuring metrological traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C1024-55PC | 1-Mbit (64K × 16), same 55 ns speed and PDIP package but half capacity | Limited to smaller firmware images; lacks A16 address line and corresponding density | Select when legacy design uses AT27C1024 and upgrade path requires minimal layout change |
| AM27C2048-55DC | 2-Mbit OTP EPROM from AMD; identical 128K × 16 organization and 55 ns timing, but PLCC (44J) package | Requires PCB redesign due to 44-pin PLCC vs. 40-pin PDIP; different pinout and VPP sequencing | Choose only if PLCC footprint is already allocated and AMD qualification is mandated |
Compared with AT27C1024-55PC, the AT27C2048-55PC doubles firmware capacity without sacrificing speed or package compatibility; versus AM27C2048-55DC, it retains the exact PDIP footprint and pinout of legacy Atmel designs, enabling true drop-in replacement where board space and rework are constrained.
Availability
AT27C2048-55PC is available at Aetrix Electronics and suitable for industrial control systems, avionics subsystems, and legacy embedded equipment requiring stable component supply and long-term obsolescence management.
Supply support for AT27C2048-55PC 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, non-volatile memory, and analog products before its acquisition by Microchip Technology in 2016.
The AT27C2048-55PC belongs to Atmel's 27C-series OTP EPROM family, designed specifically for high-reliability, pin-compatible upgrades of legacy EPROM-based systems in industrial, military, and telecom infrastructure.
FAQ
What is the programming voltage requirement for AT27C2048-55PC?
The AT27C2048-55PC requires VPP = 12.0 ± 0.5 V during programming, applied after VCC and removed before VCC. This voltage is mandatory for the Rapid™ algorithm; applying only 5 V will not program the device. Programming must be performed using certified EPROM programmers that support this dual-supply sequence and 50 µs PGM pulse width.
Does AT27C2048-55PC support both commercial and industrial temperature ranges?
Yes, the AT27C2048-55PC is specified for industrial temperature operation (−40°C to +85°C), as confirmed by the "PI" suffix in ordering codes and explicit ratings in the DC characteristics table. Its 100 µA max standby current and 55 ns tACC are guaranteed across this full range, making it suitable for harsh-environment deployments where commercial-grade parts would fail.
Can AT27C2048-55PC be used as a direct replacement for AT27C1024 in existing designs?
Yes, AT27C2048-55PC is explicitly designed as a direct upgrade from AT27C1024, sharing identical pinout, timing, and 40-lead PDIP packaging. The only hardware change required is connecting A16 (pin 31), which is NC on AT27C1024 but functional on AT27C2048-55PC. No PCB layout revision is needed beyond this single net addition.
What is the meaning of the "-55" in AT27C2048-55PC?
The "-55" in AT27C2048-55PC denotes the maximum read access time specification: 55 ns (tACC). This speed grade is validated across all operating conditions including worst-case temperature and voltage. It corresponds to the fastest speed bin in the AT27C2048 family and is required for systems demanding zero-WAIT-state operation at higher bus frequencies.
How does the Integrated Product Identification Code work on AT27C2048-55PC?
The AT27C2048-55PC embeds a Manufacturer ID (001Eh) and Device Code (00F7h) readable via dedicated address pins: hold A1–A16 low, set A9 = 12.0 V (VH), and toggle A0 between low (read ID) and high (read device code). This feature allows automatic detection and algorithm selection in universal EPROM programmers, eliminating manual part selection errors.
AT27C2048-55PC 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:
- 55 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
AT27C2048-55PC FAQ
1.How can I place an order for AT27C2048-55PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-55PC 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 AT27C2048-55PC reliable?
The price and inventory of AT27C2048-55PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-55PC is usually 5 days.
3.What payment methods are accepted for AT27C2048-55PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-55PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-55PC?
AT27C2048-55PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-55PC 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 AT27C2048-55PC?
For technical support, including AT27C2048-55PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-55PC requirements.
6.How does Aetrix verify that AT27C2048-55PC is sourced from the original manufacturer or authorized distributors?
All AT27C2048-55PC 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 AT27C2048-55PC meets industry standards.
7.What is the process for return or replacement of AT27C2048-55PC?
All AT27C2048-55PC units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-55PC, 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 AT27C2048-55PC part is unused and in its original packaging.
Return procedure for AT27C2048-55PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27C2048-55PC Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
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AT24CS02-SSHM-T
Microchip Technology
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93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
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24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
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AT24C08C-STUM-T
Microchip Technology
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