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Microchip Technology AT49F8192AT-70TI
- Part No.:
- AT49F8192AT-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F8192AT-70TI.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,602
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Product details
Overview
AT49F8192AT-70TI from Atmel is an 8-megabit (512K × 16) top-boot flash memory IC operating at 5 V, featuring 70 ns read access time, sector-based erase architecture (one 8K-word boot block, two 4K-word parameter blocks, one 496K-word main array), and hardware data protection. It supports byte/word programming with 10 µs typical write time and is used in embedded systems for firmware storage and field-upgradable code execution.
For engineers reviewing the AT49F8192AT-70TI datasheet, AT49F8192AT-70TI pinout, AT49F8192AT-70TI application, or AT49F8192AT-70TI equivalent, this page delivers verified technical context, real-world timing behavior, boot-block lockout operation, RDY/BUSY signaling, and validated alternatives for industrial firmware storage designs requiring top-boot configuration and 5 V single-supply compatibility.
Technical Context
The AT49F8192AT-70TI implements a top-boot sector architecture where the 8K-word boot block resides at address range 7E000H–7FFFFH, enabling secure bootloader storage while allowing independent erasure of parameter and main memory blocks. Its command interface uses six-bus-cycle sequences (e.g., 5555H/AAH → 2AAAH/55H → 5555H/80H) for chip/sector erase and boot lockout enable.
It features dual-mode I/O via the BYTE pin: logic high or open configures 16-bit word mode (I/O0–I/O15 active); logic low enables 8-bit byte mode (I/O0–I/O7 active, I/O15 repurposed as A−1 LSB address input). RDY/BUSY is not present on this variant - confirmed by absence in TSOP pinout and documentation - distinguishing it from AT49F008A(T) variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (512K × 16 or 1M × 8), directly supporting 16-bit microcontroller data buses without external multiplexing. |
| Read Access Time | 70 ns max - meets timing requirements for 14 MHz bus interfaces with standard CE/OE control. |
| Boot Block Location | Top-boot (7E000H–7FFFFH) - isolates secure startup code from main firmware updates, preventing accidental overwrite during field reprogramming. |
| Erase Architecture | Four-sector layout: 1×8K-word boot block + 2×4K-word parameter blocks + 1×496K-word main array - enables granular, low-risk firmware patching. |
| Programming Time | 10 µs typical per byte/word - allows rapid in-system updates without system-level timeouts or watchdog resets. |
| Power Dissipation | 50 mA active current / 100 µA CMOS standby - suitable for always-on industrial controllers with thermal constraints. |
| Endurance | 10,000 program/erase cycles - validated for multi-year field deployment in remote monitoring and PLC firmware applications. |
Pinout & Package
AT49F8192AT-70TI is housed in a 48-lead Plastic Thin Small Outline Package (TSOP, Type I, 12 × 20 mm, JEDEC MO-142 Variation DD), with lead pitch of 0.50 mm and coplanarity ≤0.10 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit addressing supports full 512K-word (16-bit) or 1M-byte (8-bit) memory map; A−1 function shared with I/O15 in byte mode. |
| CE | Chip Enable | Active-low chip select - must be low with OE low and WE high for valid read; enables bus contention avoidance in multi-device systems. |
| OE | Output Enable | Active-low output gate - controls data bus drive only when CE is also low; decouples read timing from chip selection. |
| WE | Write Enable | Active-low write strobe - initiates command latching and internal program/erase cycles; requires precise 50 ns pulse width per AC specs. |
| RESET | Reset Input | Logic-high = normal operation; logic-low forces high-Z outputs; 12 V ±0.5 V override enables boot block reprogramming despite lockout. |
| BYTE | Bus Width Select | High/open = 16-bit word mode (I/O0–I/O15 active); low = 8-bit byte mode (I/O0–I/O7 active, I/O15 = A−1 address input). |
| I/O0–I/O15 | Data I/O Bidirectional | 16-bit parallel data path in word mode; tri-stated I/O8–I/O14 in byte mode; supports standard microprocessor bus timing. |
| VCC / GND | Power Supply | 5.0 V ±10% supply with 50 mA active draw; CMOS standby draws only 100 µA - critical for low-power wake-on-event designs. |
| NC | No Connect | Pins 9, 10, 13, 14, 15 - electrically isolated; no PCB routing or termination required. |
Key Features
| Feature | Design Value |
|---|---|
| Top-boot sector architecture | Boot block fixed at 7E000H–7FFFFH - ensures bootloader integrity across firmware updates and eliminates need for external address decoding. |
| Hardware boot block lockout | 6-command sequence permanently disables boot block writes at ≤5.5 V; 12 V RESET override enables recovery - prevents field corruption of critical startup code. |
| Data Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, software-driven confirmation of program/erase completion - removes dependency on fixed timeout delays. |
| VCC sense & noise filtering | Automatic inhibition below 3.8 V and rejection of <15 ns glitches on WE/CE - prevents spurious writes during power ramp-up or EMI events. |
| Single 5 V supply operation | No external high-voltage programming supply needed - simplifies power design and eliminates charge-pump circuitry in host systems. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
|
Use Scenario: Storing and updating firmware in programmable logic controllers deployed in factory automation environments with ambient temperatures from −40°C to +85°C. IC Role / Device Role / Timing Role: Nonvolatile code storage with top-boot protection - holds bootloader and runtime firmware; 70 ns read access sustains deterministic scan-cycle timing. Use Value: Enables safe over-the-air updates to application logic while preserving immutable bootloader, reducing downtime during maintenance windows. |
Use Scenario: Securing boot code and calibration data in portable diagnostic equipment requiring FDA-compliant firmware integrity and traceability. IC Role / Device Role / Timing Role: Trusted firmware anchor - boot block stores signed bootloader verified at power-on; parameter blocks hold device-specific calibration constants. Use Value: Hardware-enforced boot block lockout prevents unauthorized modification, satisfying IEC 62304 software lifecycle requirements. |
| Telecom Base Station Configuration | Automotive Infotainment Update Module |
|
Use Scenario: Holding field-upgradable configuration tables and protocol stacks in remote radio units operating in temperature-cycled outdoor enclosures. IC Role / Device Role / Timing Role: Sector-erasable nonvolatile memory - parameter blocks store network ID and RF tuning parameters; main array holds protocol firmware images. Use Value: Independent sector erase allows zero-downtime parameter updates without resetting active call processing or signal chains. |
Use Scenario: Supporting incremental firmware patches in automotive head units where bootloader must remain unaltered across multiple software releases. IC Role / Device Role / Timing Role: Top-boot flash memory - bootloader resides in protected 7E000H–7FFFFH region; main array stores UI and media stack binaries. Use Value: Eliminates risk of bricking devices during OTA updates, as corrupted main firmware cannot compromise boot execution path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF800A-70-4C-EKE | 8 Mbit (512K × 16), 70 ns, bottom-boot, 3.3 V core (5 V tolerant I/O), no BYTE pin - requires level-shifting for pure 5 V systems. | Designed for 3.3 V embedded hosts; lacks top-boot configuration and 5 V-only simplicity of AT49F8192AT-70TI. | Select when migrating to lower-power 3.3 V platforms; avoid if legacy 5 V bus timing or top-boot security is mandatory. |
| MX29LV800CTTC-70G | 8 Mbit (512K × 16), 70 ns, top-boot, 3.0–3.6 V supply - incompatible voltage domain; no 5 V operation support. | Targeted at battery-powered portable devices; requires full voltage redesign versus AT49F8192AT-70TI's drop-in 5 V replacement capability. | Choose only for new 3.3 V designs prioritizing ultra-low standby current (<30 µA); not suitable as direct functional substitute in 5 V systems. |
Compared with SST39VF800A-70-4C-EKE and MX29LV800CTTC-70G, the AT49F8192AT-70TI uniquely delivers top-boot security, true 5 V single-supply operation, and BYTE-selectable bus width - making it irreplaceable in legacy industrial controllers requiring guaranteed bootloader immutability without voltage translation.
Availability
AT49F8192AT-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader anchoring, telecom base station configuration, and automotive infotainment update modules requiring stable component supply and long-term obsolescence management.
Supply support for AT49F8192AT-70TI 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 innovator specializing in nonvolatile memory, microcontrollers, and secure authentication solutions for industrial and automotive markets.
The AT49F8192AT-70TI belongs to Atmel's parallel-interface flash memory product line, engineered specifically for reliable, in-system reprogrammable firmware storage in harsh-temperature embedded applications demanding top-boot architecture and 5 V compatibility.
FAQ
What is the boot block address range for AT49F8192AT-70TI?
The AT49F8192AT-70TI implements top-boot architecture with its 8K-word boot block located at address range 7E000H to 7FFFFH. This is distinct from bottom-boot variants like AT49F8192A, which place the boot block at 00000H–01FFFH. The fixed top-boot location ensures bootloader code remains isolated from main firmware updates, a requirement verified in the device's block diagram and command definitions table.
Does AT49F8192AT-70TI support RDY/BUSY signaling?
No, the AT49F8192AT-70TI does not include an RDY/BUSY pin. Unlike the AT49F008A(T) series (which assigns RDY/BUSY to pin 12), the AT49F8192AT-70TI's 48-lead TSOP package omits this function - confirmed by absence in both the pin configuration diagrams and the "Pin Name / Function" table. End-of-operation detection relies solely on Data Polling (I/O7) and Toggle Bit (I/O6) methods.
How is byte vs. word mode selected on AT49F8192AT-70TI?
Byte or word mode on AT49F8192AT-70TI is controlled by the BYTE pin: logic high (or left open) enables 16-bit word mode with I/O0–I/O15 active; logic low configures 8-bit byte mode where only I/O0–I/O7 drive data and I/O15 functions as the LSB address input (A−1). This dual-mode flexibility allows seamless integration with both 8-bit and 16-bit microprocessor buses without external glue logic.
What command sequence enables boot block lockout on AT49F8192AT-70TI?
The boot block lockout feature on AT49F8192AT-70TI is enabled via a six-bus-cycle command sequence: load AAH at address 5555H, then 55H at 2AAAH, then 80H at 5555H, then AAH at 5555H, then 55H at 2AAAH, and finally 40H at 5555H. After this sequence, the boot block becomes write-protected at ≤5.5 V supply; verification is performed by reading bit I/O0 at address 7E002H - high indicates lockout is active.
Can AT49F8192AT-70TI be reprogrammed after boot block lockout is enabled?
Yes, AT49F8192AT-70TI can be reprogrammed post-lockout using the RESET pin override: applying 12.0 V ±0.5 V to RESET during chip erase, sector erase, or word programming operations temporarily disables the lockout, permitting boot block modification. Once RESET returns to TTL levels, lockout resumes - a hardware-level recovery mechanism documented in the Boot Block Programming Lockout Override section.
AT49F8192AT-70TI 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:
- 8Mbit
- Memory Organization:
- 1M x 8, 512K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49F8192AT-70TI FAQ
1.How can I place an order for AT49F8192AT-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F8192AT-70TI 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 AT49F8192AT-70TI reliable?
The price and inventory of AT49F8192AT-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F8192AT-70TI is usually 5 days.
3.What payment methods are accepted for AT49F8192AT-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F8192AT-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F8192AT-70TI?
AT49F8192AT-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F8192AT-70TI 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 AT49F8192AT-70TI?
For technical support, including AT49F8192AT-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F8192AT-70TI requirements.
6.How does Aetrix verify that AT49F8192AT-70TI is sourced from the original manufacturer or authorized distributors?
All AT49F8192AT-70TI 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 AT49F8192AT-70TI meets industry standards.
7.What is the process for return or replacement of AT49F8192AT-70TI?
All AT49F8192AT-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F8192AT-70TI, 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 AT49F8192AT-70TI part is unused and in its original packaging.
Return procedure for AT49F8192AT-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F8192AT-70TI Tags
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