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Microchip Technology AT27C4096-90VI
- Part No.:
- AT27C4096-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27C4096-90VI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,939
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Product details
Overview
AT27C4096-90VI from Atmel is a 4-Mbit (256K × 16) one-time programmable EPROM designed for firmware storage in 16-/32-bit microprocessor systems. It operates on a single 5V ±10% supply, delivers 90 ns read access time, consumes ≤100 µA standby current, and supports industrial temperature range (–40°C to +85°C) in 40-lead VSOP package.
For engineers reviewing the AT27C4096-90VI datasheet, AT27C4096-90VI pinout, AT27C4096-90VI application, or AT27C4096-90VI equivalent, this page provides verified functional role, JEDEC-standard package mapping, Rapid™ programming timing (50 µs/word), CMOS/TTL I/O compatibility, and product identification code support - all confirmed for the -90VI variant.
Technical Context
The AT27C4096-90VI implements a two-line control architecture using CE and OE to manage bus contention in high-speed systems. Its by-16 organization enables direct interface with 16-bit data buses without external multiplexing.
It features integrated product identification logic (A9 = 12.0 V ±0.5 V, A0 toggled) for automated programmer recognition, and supports rapid programming via 50 µs CE pulses at VCC = 6.5 V and VPP = 13.0 V - verified for the -90VI speed grade and industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (256K × 16) - supports full 16-bit word fetches for efficient firmware execution in microprocessor boot ROMs. |
| Read Access Time | 90 ns max - eliminates WAIT states in 10 MHz+ system clocks when interfaced with compatible address/data setup/hold timing. |
| Supply Voltage | 5 V ±10% - compatible with standard TTL/CMOS logic rails; no auxiliary voltage required for read operation. |
| Standby Current | ≤100 µA - enables low-power retention in battery-backed or intermittently powered embedded systems. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control, PLCs, and instrumentation. |
| Programming Speed | 50 µs/word typical - reduces firmware update cycle time during manufacturing programming; verified under VCC = 6.5 V, VPP = 13.0 V. |
| ESD Protection | 2,000 V HBM - ensures robustness during handling and board assembly without requiring special ESD precautions beyond standard practice. |
Pinout & Package
AT27C4096-90VI is packaged in a 40-lead Plastic Thin Small Outline Package (VSOP), 10 mm × 14 mm, JEDEC MO-142 CA compliant. Both GND pins (Pin 21 and Pin 40) must be connected for proper operation and noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 256K-word addressing (18-bit); A0–A17 fully decoded - no internal address multiplexing required. |
| O0–O15 | Data Outputs | True 16-bit parallel output bus; outputs driven to valid logic levels within tOE = 35 ns (max) after OE assertion. |
| CE | Chip Enable | Active-low global enable; controls device power state - VIH ≥ 2.0 V places device in Standby (ISB ≤ 100 µA). |
| OE | Output Enable | Active-low output gate; enables tristate output drivers independently of CE - allows shared bus arbitration. |
| VPP | Programming Voltage | 12.0 V ±0.5 V input during programming; must be applied after VCC and removed before VCC per sequencing requirement. |
| VCC | Power Supply | 5 V ±10% main supply; powers both logic and output drivers; requires local 0.1 µF ceramic decoupling. |
| GND (Pins 21, 40) | Ground Reference | Dual ground pins reduce ground bounce and improve noise margin in high-speed read cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 50 µs/word typical programming time with built-in verify-reprogram loop - cuts firmware burn time vs. legacy EPROMs and reduces test floor dwell time. |
| Integrated Product ID Code | Manufacturer ID (001Eh) and Device Code (00F4h) accessible via A9 = 12.0 V and A0 toggle - enables auto-detection and algorithm selection in production programmers. |
| Two-Line Control (CE/OE) | Independent chip and output enable permits clean bus sharing in multi-device systems without external bus transceivers or glue logic. |
| JEDEC-Standard Packages | VSOP (40V), PDIP (40P6), PLCC (44J) - ensures drop-in replacement capability across legacy and space-constrained designs. |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2,000 V ESD protection - validated for industrial assembly lines and long-term field operation. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot ROM |
|---|---|
Use Scenario: Storing immutable boot code and safety-critical firmware in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped into CPU address space; accessed during cold start and watchdog reset recovery. Use Value: 90 ns access time ensures deterministic boot latency; industrial temp rating guarantees reliability in uncontrolled cabinet environments. |
Use Scenario: Holding certified bootloader and diagnostic firmware in Class II medical instruments requiring traceable, unalterable code storage. IC Role / Device Role / Timing Role: OTP EPROM used as primary firmware repository; programmed once during final test and sealed against runtime modification. Use Value: One-time programmability prevents accidental or malicious firmware corruption; 2,000 V ESD rating supports safe handling during regulatory rework. |
| Telecom Line Card BIOS | Avionics Test Equipment Memory |
Use Scenario: Providing configuration and initialization code for carrier-grade line cards operating in telecom central offices with wide ambient temperature swings. IC Role / Device Role / Timing Role: Read-only memory holding hardware initialization routines and calibration tables; accessed during power-on self-test (POST). Use Value: –40°C to +85°C operation meets NEBS Level 3 thermal requirements; 40 mA active current supports concurrent I/O loading without rail droop. |
Use Scenario: Storing flight-certified test algorithms and calibration constants in portable avionics ground support equipment. IC Role / Device Role / Timing Role: Firmware storage element with guaranteed data retention >20 years; accessed only during equipment startup and maintenance mode. Use Value: OTP architecture satisfies DO-178C tool qualification constraints for immutable software artifacts; VSOP package enables compact, vibration-resistant PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM27C4096-90DC | AMD version; identical 256K×16 organization and 90 ns speed, but uses different product ID coding and slightly higher VPP tolerance (12.5 V to 13.5 V). | Same industrial temperature range and VSOP packaging; requires updated programmer ID table due to different manufacturer/device codes. | Select when AMD-programmer ecosystem compatibility is required or when dual-sourcing from Atmel/AMD is mandated by procurement policy. |
| MX27C4096-90PC | Macronix version; matches 90 ns access and 5 V supply, but specifies 150 µA max standby current and lacks integrated product ID code. | Compatible pinout and timing in PDIP only; VSOP variant not offered - requires PCB redesign if migrating from AT27C4096-90VI's 40V package. | Choose for cost-sensitive industrial applications where product ID auto-detection is unnecessary and PDIP is acceptable. |
Compared with AM27C4096-90DC and MX27C4096-90PC, the AT27C4096-90VI uniquely combines industrial-temp VSOP packaging, 100 µA standby current, and standardized product ID code - making it optimal for space-constrained, auto-programmed, and long-lifecycle embedded systems.
Availability
AT27C4096-90VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot ROM, and telecom line card BIOS requiring stable component supply, long-term lifecycle support, and JEDEC-standard OTP EPROM compatibility.
Supply support for AT27C4096-90VI 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 (now part of Microchip Technology) is a fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27C4096 belongs to Atmel's legacy OTP EPROM product line, engineered for reliable, high-density firmware storage in systems where code immutability, deterministic timing, and industrial environmental resilience are critical design requirements.
FAQ
What is the maximum read access time specified for the AT27C4096-90VI?
The AT27C4096-90VI has a maximum read access time of 90 ns under industrial temperature conditions (–40°C to +85°C) and VCC = 5 V ±10%. This value is measured from address valid or CE/OE assertion to valid data on O0–O15, and is guaranteed across the full operating range - enabling integration into 10 MHz microprocessor buses without WAIT-state insertion. The AT27C4096-90VI datasheet confirms this parameter in its AC Characteristics table for the -90 speed grade.
Does the AT27C4096-90VI require a programming voltage (VPP) during normal read operation?
No, the AT27C4096-90VI operates from a single 5 V ±10% supply during read mode; VPP is only required during programming and product identification modes. In read mode, VPP may be tied to VCC or left floating (though grounding is recommended for noise immunity). The AT27C4096-90VI datasheet explicitly states that VPP = VCC is permissible for standby and read operations, and that VPP sequencing (applied after VCC, removed before VCC) applies solely to programming cycles.
What package type does the AT27C4096-90VI use, and is it JEDEC-compliant?
The AT27C4096-90VI uses a 40-lead Plastic Thin Small Outline Package (VSOP), designated as package code "40V", measuring 10 mm × 14 mm. It complies with JEDEC MO-142 CA outline standards, ensuring mechanical and footprint compatibility with automated assembly equipment and legacy socket adapters. The AT27C4096-90VI's VSOP package is distinct from the PDIP and PLCC variants and is explicitly listed in Atmel's Ordering Information table for the -90VI suffix.
How does the Rapid™ Programming Algorithm benefit production programming of the AT27C4096-90VI?
The Rapid™ Programming Algorithm reduces AT27C4096-90VI programming time to 50 µs per word (typical), significantly accelerating firmware burn-in during manufacturing. It employs an initial pulse followed by verify-reprogram loops (up to 10 pulses per word), ensuring high first-pass yield. This algorithm is validated for the AT27C4096-90VI at VCC = 6.5 V and VPP = 13.0 V, and is supported by industry-standard programmers via the device's integrated product ID code - eliminating manual algorithm selection.
Can the AT27C4096-90VI be used in systems requiring both commercial and industrial temperature ranges?
The AT27C4096-90VI is specifically rated for the industrial temperature range (–40°C to +85°C) and is not qualified for commercial operation (0°C to +70°C) - the "I" suffix denotes industrial grade. While it will function across the commercial range, only the industrial specification is guaranteed and tested. Systems requiring commercial-grade validation must use the -90JC or -90VC variants. The AT27C4096-90VI datasheet's Ordering Information table confirms the "I" suffix corresponds exclusively to industrial temperature screening.
AT27C4096-90VI 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:
- 4Mbit
- Memory Organization:
- 256K 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
AT27C4096-90VI FAQ
1.How can I place an order for AT27C4096-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27C4096-90VI 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 AT27C4096-90VI reliable?
The price and inventory of AT27C4096-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27C4096-90VI is usually 5 days.
3.What payment methods are accepted for AT27C4096-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27C4096-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27C4096-90VI?
AT27C4096-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27C4096-90VI 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 AT27C4096-90VI?
For technical support, including AT27C4096-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27C4096-90VI requirements.
6.How does Aetrix verify that AT27C4096-90VI is sourced from the original manufacturer or authorized distributors?
All AT27C4096-90VI 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 AT27C4096-90VI meets industry standards.
7.What is the process for return or replacement of AT27C4096-90VI?
All AT27C4096-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT27C4096-90VI, 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 AT27C4096-90VI part is unused and in its original packaging.
Return procedure for AT27C4096-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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