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Microchip Technology AT27C2048-90VI
- Part No.:
- AT27C2048-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27C2048-90VI.pdf
- Description:
- IC EPROM 2MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,938
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Product details
Overview
AT27C2048-90VI from Atmel is a 2-Mbit (128K × 16) one-time programmable EPROM optimized for high-performance 16/32-bit microprocessor systems, featuring 90 ns read access time, 5V ±10% supply operation, 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 with <100 µA standby current.
For engineers reviewing the AT27C2048-90VI datasheet, AT27C2048-90VI pinout, AT27C2048-90VI application, or AT27C2048-90VI equivalent, key selection criteria include its VSOP-40 package compatibility, dual-line CE/OE control for bus contention avoidance, OTP reliability in firmware storage, and direct upgrade path from AT27C516/AT27C1024.
Technical Context
The AT27C2048-90VI implements a CMOS-based OTP memory architecture with 128K-word × 16-bit organization, using address decoding (A0–A16), output buffers (O0–O15), and integrated product identification logic. Its two-line control (CE/OE) enables precise timing control in high-speed bus environments without WAIT states.
It operates exclusively in 5V read mode with VPP = 12.0V ±0.5V required only during programming. The device features Rapid™ programming algorithm with verification loop, ESD protection up to 2,000V, and latchup immunity of 200 mA - all validated under industrial temperature conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2,097,152 bits (128K × 16) - supports full 16-bit data bus interface without byte-wide splitting. |
| Read Access Time | 90 ns max - eliminates WAIT states in 5 MHz microprocessor systems (tACC ≤ 90 ns). |
| Supply Voltage | 5V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage rails needed for read operation. |
| Active Current | 35 mA max at 5 MHz - enables stable operation in dense memory arrays with minimal thermal impact. |
| Standby Current | 100 µA max - reduces system power budget during idle cycles in battery-backed or low-power embedded designs. |
| Programming Speed | 50 µs/word typical - accelerates firmware burn-in and production programming throughput. |
| Operating Temperature | -40°C to +85°C - qualified for industrial control, motor drives, and factory automation environments. |
Pinout & Package
AT27C2048-90VI is supplied in a 40-lead Plastic Thin Small Outline Package (VSOP), 10 mm × 14 mm footprint per JEDEC MO-142 CA. Pin 1 marked via notch; both GND pins (19 and 40) must be connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A0 LSB, A16 MSB. |
| O0–O15 | Data Outputs | True 16-bit parallel output bus; CMOS/TTL-compatible drive strength (VOH ≥ 2.4V, VOL ≤ 0.4V). |
| CE | Chip Enable | Active-low global enable; controls device activation and standby entry (VIH ≥ 2.0V disables outputs). |
| OE | Output Enable | Active-low output gate; allows bus sharing without contention when CE = VIH and OE = VIH. |
| PGM | Program Strobe | Active-low pulse input triggering 50 µs programming cycle; requires VPP = 12.0V ±0.5V. |
| VPP | Programming Voltage | 12.0V ±0.5V input during programming; must be applied after VCC and removed before VCC. |
| VCC | Power Supply | 5V ±10% main supply; powers read, standby, and programming logic (ICC2 ≤ 50 mA during program). |
| GND (Pins 19, 40) | Ground Reference | Dual ground connections reduce noise coupling and ensure stable timing margins in high-speed reads. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical write time with built-in verify-reprogram loop - reduces firmware programming cycle time by >3× vs legacy EPROMs. |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F7h) accessible via A9/VH and A0 toggle - enables automated programmer validation and BOM traceability. |
| Two-Line Control (CE/OE) | Independent chip and output enables eliminate bus contention in multiprocessor or shared-memory systems - supports clean read/write handshaking. |
| JEDEC-Standard VSOP-40 | 10 mm × 14 mm surface-mount footprint with 0.5 mm pitch - enables high-density PCB layouts and reflow-compatible assembly. |
| Industrial Temperature Rating | -40°C to +85°C operation with guaranteed tACC ≤ 90 ns across full range - suitable for motor control, PLC, and outdoor equipment. |
Applications
| Industrial Motor Control Firmware Storage | Legacy Industrial PLC Boot Memory |
|---|---|
|
Use Scenario: Stores motion control algorithms and safety-critical boot code in servo drive controllers operating continuously at 70°C ambient. IC Role / Device Role / Timing Role: Non-volatile firmware ROM providing deterministic 90 ns read access to instruction fetches for real-time DSP execution. Use Value: Eliminates WAIT states in 5 MHz Z80/80C188-based motion sequencers, ensuring sub-microsecond interrupt latency and jitter-free PWM generation. |
Use Scenario: Holds ladder logic interpreter and I/O configuration tables in DIN-rail mounted programmable logic controllers deployed in factory environments. IC Role / Device Role / Timing Role: OTP EPROM serving as immutable boot loader memory, accessed during cold start and watchdog reset recovery. Use Value: Guarantees firmware integrity over 10+ year service life with no risk of accidental overwrite - critical for certified safety functions (IEC 61508 SIL2). |
| Medical Diagnostic Equipment BIOS | Avionics Display System Boot ROM |
|
Use Scenario: Stores initialization routines and calibration constants in portable ultrasound imaging units requiring reliable startup after battery cycling. IC Role / Device Role / Timing Role: Primary boot ROM delivering verified firmware image to ARM9 processor on power-up, with CE/OE-controlled bus isolation. Use Value: 100 µA standby current extends battery runtime between charges; industrial temp rating ensures operation in uncontrolled clinical environments. |
Use Scenario: Holds display controller firmware and font assets in cockpit multifunction displays subjected to thermal cycling and vibration. IC Role / Device Role / Timing Role: Radiation-tolerant (non-flash) OTP memory providing fail-safe boot code immune to single-event upsets in avionics subsystems. Use Value: High-reliability CMOS process with 2,000V ESD and 200 mA latchup immunity meets DO-160 Section 22 surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C2048-90PC | Same die, PDIP-40 package (0.600" width); higher profile, through-hole mounting. | Suitable for prototyping, legacy board repair, or applications requiring mechanical robustness over density. | Select AT27C2048-90PC if manual soldering, socket-based testing, or thermal mass tolerance is prioritized over PCB area. |
| AT27C2048-90JI | Same die, PLCC-44 package; 44-pin J-lead, 16.7 mm × 16.7 mm footprint. | Used where existing PLCC sockets exist or where thermal dissipation margin exceeds VSOP limits. | Select AT27C2048-90JI only if legacy PLCC infrastructure mandates compatibility - not a drop-in replacement for VSOP layout. |
Compared with AT27C2048-90PC and AT27C2048-90JI, the AT27C2048-90VI offers the smallest PCB footprint (10 mm × 14 mm), best thermal performance in surface-mount assemblies, and optimal fit for high-density industrial control modules where space and reflow compatibility are critical.
Availability
AT27C2048-90VI is available at Aetrix Electronics and suitable for industrial motor control, PLC firmware storage, and medical diagnostic equipment requiring stable component supply across extended lifecycle programs.
Supply support for AT27C2048-90VI 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 programmable logic devices before its acquisition by Microchip Technology in 2016.
The AT27C2048 belongs to Atmel's OTP EPROM product line, designed specifically for firmware storage in industrial, automotive, and medical systems where data immutability, long-term reliability, and deterministic timing outweigh reprogrammability needs.
FAQ
What is the maximum read access time specified for AT27C2048-90VI?
The AT27C2048-90VI has a maximum read access time (tACC) of 90 ns under industrial temperature conditions (-40°C to +85°C) and 5V ±10% supply. This value is guaranteed across the full operating range and enables direct interfacing with 5 MHz microprocessors without WAIT state insertion. The -90 speed grade designation directly reflects this timing specification.
Does AT27C2048-90VI require a programming voltage during normal read operation?
No, AT27C2048-90VI operates from a single 5V ±10% supply during read and standby modes. VPP (12.0V ±0.5V) is required only during programming and product identification readout. During normal operation, VPP may be tied to VCC, but must be isolated during programming to prevent damage or incorrect behavior of the AT27C2048-90VI.
Can AT27C2048-90VI be used as a direct replacement for AT27C1024 in an existing design?
Yes, AT27C2048-90VI is explicitly designed as a direct upgrade from AT27C1024 (1M-bit) and AT27C516 (512K-bit) EPROMs. It maintains identical pinout, voltage levels, timing interfaces (CE/OE), and programming methodology - allowing drop-in replacement with doubled capacity (128K × 16 vs 64K × 16) and same 90 ns access time.
What package type does AT27C2048-90VI use, and what are its key mechanical dimensions?
AT27C2048-90VI uses a 40-lead Plastic Thin Small Outline Package (VSOP) compliant with JEDEC MO-142 CA. Its footprint measures 10 mm × 14 mm with 0.5 mm lead pitch. The package features gull-wing leads, a body thickness of 1.2 mm max, and dual GND pins (19 and 40) that must both be soldered for signal integrity and thermal performance.
How does the Integrated Product Identification Code function in AT27C2048-90VI?
The AT27C2048-90VI embeds a Manufacturer ID (001Eh) and Device Code (00F7h) accessible via dedicated read sequence: A9 driven to 12.0V ±0.5V while A0 toggles between VIL/VIH and all other address lines held low. This feature enables automatic detection by industry-standard programmers, ensuring correct algorithm selection and eliminating manual part number entry errors during AT27C2048-90VI programming.
AT27C2048-90VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT27C2048-90VI FAQ
1.How can I place an order for AT27C2048-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C2048-90VI 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 AT27C2048-90VI reliable?
The price and inventory of AT27C2048-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C2048-90VI is usually 5 days.
3.What payment methods are accepted for AT27C2048-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C2048-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C2048-90VI?
AT27C2048-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C2048-90VI 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 AT27C2048-90VI?
For technical support, including AT27C2048-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C2048-90VI requirements.
6.How does Aetrix verify that AT27C2048-90VI is sourced from the original manufacturer or authorized distributors?
All AT27C2048-90VI 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 AT27C2048-90VI meets industry standards.
7.What is the process for return or replacement of AT27C2048-90VI?
All AT27C2048-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C2048-90VI, 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 AT27C2048-90VI part is unused and in its original packaging.
Return procedure for AT27C2048-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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