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Microchip Technology AT49F4096A-90TC
- Part No.:
- AT49F4096A-90TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F4096A-90TC.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,407
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Product details
Overview
AT49F4096A-90TC from Atmel is a 5V, 4-megabit (512K × 8 / 256K × 16) Flash memory IC with 70 ns read access time, sector-based architecture (including 8K-word boot block with programming lockout), and byte/word programming capability (10 µs typical). It operates in commercial temperature range (0°C to 70°C) and is used for firmware storage and secure boot code retention in embedded microcontroller systems.
For engineers reviewing the AT49F4096A-90TC datasheet, AT49F4096A-90TC pinout, AT49F4096A-90TC application, or AT49F4096A-90TC equivalent, key selection considerations include its bottom-boot sector protection, hardware reset-enabled boot override (12V on RESET), TSOP-48 package compatibility, and support for standard EPROM-like CE/OE/WE control interface without high-voltage programming.
Technical Context
The AT49F4096A-90TC implements a four-sector Flash architecture: one 8K-word boot block (00000H–01FFFH), two 4K-word parameter blocks, and one 240K-word main memory array. Erase operations are internally controlled via command sequences-chip erase (6-byte sequence, tEC ≤ 5 s) or sector erase (6-cycle, address-specific)-with automatic timing and no external clocks required.
Programming uses embedded algorithms: byte/word write cycles (4-bus, tBP = 10–50 µs), data polling (I/O7 complement), and toggle-bit detection (I/O6 toggling). Hardware protection includes VCC sense (<3.8V inhibit), 10 ms power-on delay, noise filtering (<15 ns pulse rejection), and CE/OE/WE state-dependent program inhibition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8 or 256K × 16 organization) |
| Read Access Time | 90 ns max - defines maximum latency for instruction/data fetch in real-time systems |
| Supply Voltage | 5 V ±10% - single-supply operation compatible with legacy 5V microcontroller buses |
| Active Current | 50 mA max - determines power budget for active read cycles in battery-sensitive designs |
| Standby Current | 100 µA CMOS - enables low-power hold mode during system sleep states |
| Endurance | 10,000 program/erase cycles - specifies field-reprogrammability lifespan for firmware updates |
| Operating Temp | 0°C to 70°C - validated for commercial-grade industrial control and consumer electronics |
Pinout & Package
AT49F4096A-90TC is packaged in a 48-lead Plastic Thin Small Outline Package (TSOP), Type 1, with 0.5 mm lead pitch and JEDEC MO-142 D outline. Pin 1 marked by white dot; body dimensions 12.0 × 20.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 512K-byte addressing space |
| CE | Chip Enable | Primary chip-select; must be low for read/write; high forces outputs to high-Z |
| OE | Output Enable | Controls output buffer; low enables data output during read; high disables outputs |
| WE | Write Enable | Active-low strobe for write/erase command latching; used with CE for bus cycle timing |
| RESET | Reset Input | Halts operation and forces outputs to high-Z; 12V input overrides boot lockout |
| BYTE | Mode Select | Logic '1' or open = word mode (I/O0–I/O15 active); logic '0' = byte mode (I/O0–I/O7 active, I/O15 = A−1) |
| I/O0–I/O15 | Data I/O | Bidirectional data bus; direction and width determined by BYTE and control signals |
| VCC / GND | Power Supply | 5V core supply and ground; decoupling required per AC timing stability |
Key Features
| Feature | Design Value |
|---|---|
| Bottom-boot sector protection | 8K-word (00000H–01FFFH) lockout prevents accidental overwrite of boot code using standard 5V programming |
| Hardware boot override | 12V ±0.5V applied to RESET pin temporarily disables boot lockout for field recovery without hardware redesign |
| Embedded erase/program control | Internal state machine executes chip/sector erase and byte/word programming without external timing circuitry |
| Data polling & toggle bit | I/O7 complement and I/O6 toggling provide real-time, software-driven status feedback without polling delays or timers |
| Standard EPROM interface | CE/OE/WE control logic matches legacy microprocessor bus timing, enabling drop-in replacement in existing designs |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers requiring field-upgradable code with guaranteed boot integrity. IC Role / Device Role / Timing Role: Non-volatile boot memory holding initialization routines and safety-critical startup sequences. Use Value: Bottom-boot lockout ensures bootloader remains unaltered during main firmware updates, preventing bricking during remote upgrades. | Use Scenario: Securing boot firmware in FDA-class II medical instruments where regulatory compliance mandates immutable startup code. IC Role / Device Role / Timing Role: Trusted boot memory providing tamper-resistant execution environment for diagnostic and calibration modules. Use Value: 12V RESET override allows authorized service personnel to reflash protected boot sectors without board removal or specialized programmers. |
| Automotive Infotainment System BIOS | Networking Equipment Parameter Storage |
Use Scenario: Hosting BIOS and driver images in automotive head units subject to wide temperature swings and EMI. IC Role / Device Role / Timing Role: High-reliability Flash memory interfacing directly with 80C51 or ARM7-based host controllers via parallel bus. Use Value: 90 ns read access meets real-time boot timing budgets; 0°C to 70°C rating covers cabin ambient requirements. | Use Scenario: Storing network configuration parameters (IP, MAC, VLAN) in Ethernet switches requiring frequent non-disruptive updates. IC Role / Device Role / Timing Role: Sector-erasable parameter memory allowing independent update of config blocks without disturbing main firmware. Use Value: Two 4K-word parameter blocks enable atomic swap of active/inactive configuration sets, ensuring zero-downtime reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV400BT-90EC | 4 Mbit, 90 ns, 3V core (3.0–3.6V), top-boot configuration, requires VPP = 12V for programming | Designed for 3V systems; top-boot layout places protected sector at highest addresses | Select if migrating to lower-voltage platforms or requiring top-boot alignment with legacy AM29F designs |
| SST39VF400A-90-4C-EKE | 4 Mbit, 90 ns, 3.3V supply, 48-TSOP, supports both top- and bottom-boot via hardware strap | Offers flexible boot location selection and faster sector erase (100 ms vs. 10 s), but lacks 12V RESET override | Prefer when dual-boot flexibility and faster erase are critical, and boot lockout override is handled externally |
Compared with AM29LV400BT-90EC and SST39VF400A-90-4C-EKE, the AT49F4096A-90TC uniquely combines 5V-only operation, bottom-boot lockout with 12V RESET override, and sector erase times optimized for infrequent but robust field updates-making it ideal for cost-sensitive, legacy 5V embedded systems requiring guaranteed boot integrity.
Availability
AT49F4096A-90TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and automotive infotainment BIOS applications requiring stable component supply across extended production lifecycles.
Supply support for AT49F4096A-90TC 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 semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication devices.
The AT49F4096A product line delivers cost-effective, 5V-compatible Flash memory for embedded systems requiring field-upgradable firmware with hardware-enforced boot protection and simple parallel bus integration.
FAQ
What is the operating temperature range for the AT49F4096A-90TC?
The AT49F4096A-90TC is rated for commercial operation from 0°C to 70°C. This range is validated per its ordering code suffix "C" and applies to all DC and AC specifications including 90 ns read access time, 50 mA active current, and 100 µA standby current. Industrial variants (e.g., AT49F4096A-90TI) extend to −40°C to +85°C but use different packaging and test screening.
How does the boot block programming lockout work on the AT49F4096A-90TC?
The AT49F4096A-90TC boot block lockout is enabled via a six-cycle command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once activated, the 8K-word boot sector (00000H–01FFFH) becomes immune to programming or erasure using ≤5.5V inputs. The AT49F4096A-90TC retains this protection until overridden by 12V on RESET during an erase or program operation.
Can the AT49F4096A-90TC be used in word mode or byte mode, and how is it selected?
Yes, the AT49F4096A-90TC supports both modes via the BYTE pin. When BYTE = logic '1' or open, the device operates in 16-bit word mode with I/O0–I/O15 active. When BYTE = logic '0', it operates in 8-bit byte mode: only I/O0–I/O7 drive data, while I/O15 functions as LSB address input (A−1) and I/O8–I/O14 enter high-impedance state. This dual-mode capability allows flexible integration with 8-bit or 16-bit microprocessor buses without external glue logic.
What is the maximum erase time for a full chip erase on the AT49F4096A-90TC?
The maximum erase time for a full chip erase on the AT49F4096A-90TC is 5 seconds (tEC), as specified in the AC Program Cycle Characteristics table. This time is internally controlled-the device generates all necessary internal pulses and timing without external clocking. Note that if boot block lockout is enabled, chip erase affects only the main memory and parameter blocks, not the protected boot sector.
Does the AT49F4096A-90TC require external high-voltage programming signals?
No, the AT49F4096A-90TC does not require external high-voltage programming signals. All programming and erase operations use standard 5V logic levels on CE, OE, WE, and address/data pins. The only exception is the 12V ±0.5V signal applied to the RESET pin solely to override boot block lockout-this is not used for routine programming and is strictly for recovery scenarios. Normal byte/word programming completes in 10–50 µs at 5V.
AT49F4096A-90TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8, 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49F4096A-90TC FAQ
1.How can I place an order for AT49F4096A-90TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F4096A-90TC 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 AT49F4096A-90TC reliable?
The price and inventory of AT49F4096A-90TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F4096A-90TC is usually 5 days.
3.What payment methods are accepted for AT49F4096A-90TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F4096A-90TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F4096A-90TC?
AT49F4096A-90TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F4096A-90TC 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 AT49F4096A-90TC?
For technical support, including AT49F4096A-90TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F4096A-90TC requirements.
6.How does Aetrix verify that AT49F4096A-90TC is sourced from the original manufacturer or authorized distributors?
All AT49F4096A-90TC 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 AT49F4096A-90TC meets industry standards.
7.What is the process for return or replacement of AT49F4096A-90TC?
All AT49F4096A-90TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F4096A-90TC, 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 AT49F4096A-90TC part is unused and in its original packaging.
Return procedure for AT49F4096A-90TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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