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HomeProductsIntegrated Circuits (ICs)MemoryPC28F640P30B85A
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PC28F640P30B85A - Micron Technology Inc.

Manufacturer Part Number
PC28F640P30B85A
Manufacturer
Micron Technology
Allelco Part Number
98D-PC28F640P30B85A
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
3,997 pcs available, New & Original
Parts Description
IC FLASH 64MBIT PAR 64EASYBGA
Package
64-EasyBGA (10x13)
Data sheet
PC28F640P30B85A.pdf
RoHs Status
ROHS3 Compliant
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Specifications

PC28F640P30B85A Tech Specifications
Micron Technology Inc. - PC28F640P30B85A technical specifications, attributes, parameters and parts with similar specifications to Micron Technology Inc. - PC28F640P30B85A

Product Attribute Attribute Value
Manufacturer Micron Technology
Write Cycle Time - Word, Page 85ns
Voltage - Supply 1.7V ~ 2V
Technology FLASH - NOR
Supplier Device Package 64-EasyBGA (10x13)
Series StrataFlash™
Package / Case 64-TBGA
Package Tray
Operating Temperature -40°C ~ 85°C (TA)
Product Attribute Attribute Value
Mounting Type Surface Mount
Memory Type Non-Volatile
Memory Size 64Mbit
Memory Organization 4M x 16
Memory Interface Parallel
Memory Format FLASH
Clock Frequency 52 MHz
Base Product Number PC28F640
Access Time 85 ns

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN 3A991B1A
HTSUS 8542.32.0071

Frequently Asked Questions(FAQ)

What are the key timing constraints to consider when interfacing the PC28F640P30B85A in a high-speed embedded system design?
The PC28F640P30B85A has an access time of 85 ns and supports a maximum clock frequency of 52 MHz in synchronous mode. When designing the memory controller interface, ensure that address setup, data valid windows, and control signal propagation delays account for this 85 ns latency. In asynchronous read operations, the system must hold the address stable until data becomes valid, requiring careful timing budgeting—especially in systems with long PCB trace delays or multi-drop buses. For write cycles, the 85 ns page write time implies that back-to-back writes to the same page should avoid overlapping without proper wait-state insertion.
How does the 1.7V to 2.0V supply voltage range of the PC28F640P30B85A affect power supply design and noise margins?
Operating the PC28F640P30B85A within its 1.7V to 2.0V window demands a tightly regulated power delivery network. Voltage drops below 1.7V may result in data retention failures or write operation instability, while exceeding 2.0V risks oxide degradation over time. Designers should use low-dropout regulators (LDOs) or point-of-load DC-DC converters with ±2% accuracy and include decoupling capacitors (typically 100 nF per power pin) placed within 2 mm of the package to suppress transient noise during read/write bursts.
Can the PC28F640P30B85A sustain continuous random read operations at 52 MHz without performance degradation?
Yes, the PC28F640P30B85A supports sustained 52 MHz synchronous burst reads, but thermal and signal integrity factors must be considered. At maximum frequency and ambient temperature (85°C), internal junction temperatures may rise, potentially affecting long-term reliability. Additionally, the 64-EasyBGA package’s parasitic inductance can introduce signal reflections if trace impedance is not matched to 50 Ω. For reliable operation, implement controlled impedance routing and verify signal integrity through eye diagram analysis.
What is the significance of the 4M x 16 memory organization in the PC28F640P30B85A for system address mapping?
The 4M x 16 organization means the PC28F640P30B85A contains 4 million 16-bit words, requiring 22 address lines (A0–A21) for full addressing. This structure is optimal for 16-bit microcontrollers or DSPs that natively handle word-aligned data. When integrating into a 32-bit system, two devices can be paired to form a 32-bit wide memory bank, with address decoding ensuring proper chip select and byte enable alignment. Misalignment can lead to inefficient memory utilization or increased software overhead.
How does the PC28F640P30B85A compare to serial NOR flash devices in terms of boot time and code execution performance?
Compared to serial NOR flash (e.g., SPI-based devices), the PC28F640P30B85A offers significantly faster random access due to its parallel interface and 85 ns access time, enabling execute-in-place (XIP) with minimal wait states. A typical SPI NOR may require 30–50 clock cycles per read at 50 MHz, resulting in effective access times over 600 ns. The PC28F640P30B85A’s parallel bus allows full-word retrieval in a single cycle, reducing boot time by up to 70% in applications loading large firmware images directly from flash.
What are the implications of the MSL 3 rating for handling and assembly of the PC28F640P30B85A?
The PC28F640P30B85A has a Moisture Sensitivity Level (MSL) of 3, allowing exposure to ambient conditions (≤30°C/60% RH) for up to 168 hours before reflow. After this floor life, the device must be baked at 125°C for 24 hours to remove absorbed moisture. During PCB assembly, avoid prolonged exposure during kitting or rework. Use dry storage (e.g., desiccant-packed reels) and follow IPC/JEDEC J-STD-033 guidelines to prevent popcorning during solder reflow, especially given the 64-EasyBGA package’s sensitivity to thermal stress.
How does the StrataFlash™ architecture in the PC28F640P30B85A influence endurance and data retention in industrial applications?
The StrataFlash™ architecture used in the PC28F640P30B85A employs a NOR-based cell structure with enhanced tunnel oxide and charge pump design, supporting a minimum of 100,000 program/erase cycles per block. Data retention is rated for 20 years at 85°C, making it suitable for long-lifecycle industrial systems. However, frequent reprogramming of the same block—common in logging applications—should be mitigated through wear-leveling firmware or partitioning frequently updated data into separate blocks to avoid premature failure.
What design considerations are necessary for reliable operation of the PC28F640P30B85A across its full temperature range (-40°C to 85°C)?
At -40°C, the PC28F640P30B85A may exhibit slightly increased access time due to carrier mobility reduction, though it remains within the 85 ns specification. Ensure that the system controller accommodates this via conservative timing margins. At 85°C, increased leakage current and thermal noise may affect signal integrity; use ground planes beneath the BGA and minimize simultaneous switching noise from adjacent high-speed signals. Thermal vias under the package can improve heat dissipation, especially in enclosed environments.
Can the PC28F640P30B85A be used in safety-critical automotive applications, and what qualifications should be verified?
While the PC28F640P30B85A operates within the -40°C to 85°C range suitable for many automotive subsystems, it is not explicitly qualified to AEC-Q100 standards. For safety-critical functions (e.g., ADAS, powertrain), verify whether the application requires ISO 26262 compliance or specific fault tolerance features. The device’s ECCN 3A991B1A classification indicates it is not subject to U.S. export restrictions on military end-use, but additional qualification testing—such as HTOL (Highly Accelerated Life Testing)—may be necessary for automotive-grade deployment.
How does the PC28F640P30B85A perform in systems requiring frequent small-block updates, and what strategies mitigate write latency?
The PC28F640P30B85A supports page writes with an 85 ns cycle time, but block erase operations (typically 1–2 seconds for a 128 KB block) dominate latency in update-heavy applications. To mitigate this, implement a shadowing strategy where updated data is written to a free block while the old block is marked for later erase. This reduces perceived latency and spreads wear. Additionally, grouping small updates into larger page writes improves efficiency, as partial-page writes still consume a full page cycle.
What are the trade-offs between using the PC28F640P30B85A and a larger-density parallel NOR flash in cost-sensitive designs?
The PC28F640P30B85A offers a balance of density (64 Mbit) and performance at a lower cost than higher-density alternatives (e.g., 128 Mbit or 256 Mbit devices). However, larger NOR flashes may provide better $/Mbit economics and reduce PCB real estate in memory-intensive applications. For systems requiring less than 8 MB of code storage, the PC28F640P30B85A avoids over-provisioning while maintaining fast access. Evaluate total system cost, including controller complexity and power, rather than per-bit price alone.
How should signal integrity be managed for the address and data lines of the PC28F640P30B85A in a multi-layer PCB?
The 64-EasyBGA package of the PC28F640P30B85A has tight pin pitch (0.8 mm), requiring careful routing to avoid crosstalk. Route address and data lines as matched-length, 50 Ω impedance-controlled traces on inner layers, with ground planes above and below to minimize loop inductance. Avoid vias in high-speed signal paths where possible; if necessary, use back-drilled vias to reduce stub effects. Termination resistors (typically 22–33 Ω in series) at the driver end can dampen reflections, especially in systems with long trace lengths (>10 cm).
Is the PC28F640P30B85A suitable for firmware storage in field-upgradable IoT edge devices?
Yes, provided the system implements robust update protocols. The PC28F640P30B85A supports sector-level erase and write protection features, enabling safe in-field firmware updates. However, power loss during a write or erase cycle can corrupt data. Use a dual-bank scheme with a bootloader that validates checksums before switching banks. Additionally, leverage the device’s hardware write protection pins to prevent accidental writes during normal operation, enhancing system reliability in remote deployments.
What debugging challenges might arise when integrating the PC28F640P30B85A, and how can they be addressed?
Debugging issues often stem from timing violations or incorrect command sequencing. Use a logic analyzer to capture the WE#, OE#, CE#, and address lines during read/write operations, verifying that setup and hold times meet the 85 ns access requirement. Inconsistent behavior may indicate floating control lines—ensure pull-up or pull-down resistors are used where specified. Additionally, monitor the RY/BY# pin to confirm the device is not busy during erase or program operations, which can take seconds to complete.
How does the PC28F640P30B85A compare to embedded flash in microcontrollers for real-time control applications?
Unlike embedded flash in MCUs, which is tightly coupled to the CPU and supports zero-wait-state access, the PC28F640P30B85A introduces 85 ns latency, requiring wait states in the memory controller. This can impact deterministic response in hard real-time systems. However, the PC28F640P30B85A offers higher density and field reprogrammability without MCU obsolescence risks. For applications where code size exceeds MCU flash limits or frequent updates are needed, it provides a scalable alternative despite slightly reduced performance predictability.
What precautions are necessary when designing the reset and initialization sequence for systems using the PC28F640P30B85A?
Upon power-up, the PC28F640P30B85A requires a stable VCC (within 1.7V–2.0V) and a valid reset signal (RP# held low for at least 100 ns) to ensure internal state machines initialize correctly. Avoid accessing the device until VCC reaches 1.5V and remains stable for 1 ms. During this period, all control signals should be held in a safe state (e.g., CE# high, WE# high) to prevent unintended writes. Incorrect initialization can leave the device in an undefined mode, requiring a full power cycle to recover.

Parts with Similar Specifications

The three parts on the right have similar specifications to Micron Technology Inc. PC28F640P30B85A

Product Attribute PC28F640P30B85E PC28F640P30B85D TR PC28F640P30BF65A PC28F640P30BF65A
Part Number PC28F640P30B85E PC28F640P30B85D TR PC28F640P30BF65A PC28F640P30BF65A
Manufacturer Micron Technology Inc. Micron Technology Inc. Micron Technology Inc. Alliance Memory, Inc.
Series - - - -
Clock Frequency - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Memory Size - - - -
Memory Interface - - - -
Memory Organization - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Memory Type - - - -
Access Time - - - -
Write Cycle Time - Word, Page - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Supply - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Memory Format - - - -
Technology - - - -

PC28F640P30B85A Datasheet PDF

Download PC28F640P30B85A pdf datasheets and Micron Technology Inc. documentation for PC28F640P30B85A - Micron Technology Inc..

Datasheets
P30 StrataFlash Embedded Memory.pdf

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Customer Reviews

Evaluation: 10 Articles

  • ECUb***h
    Sep 22, 2026

    Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.

  • RS48***ieldTech
    Sep 16, 2026

    Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.

  • Logi***b_Chris
    Sep 8, 2026

    Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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PC28F640P30B85A Image

PC28F640P30B85A

Micron Technology Inc.
98D-PC28F640P30B85A

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