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HomeProductsIntegrated Circuits (ICs)Specialized ICsMB88347LPFV
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MB88347LPFV - Fujitsu Electronics America, Inc.

Manufacturer Part Number
MB88347LPFV
Manufacturer
Fujitsu
Allelco Part Number
32D-MB88347LPFV
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
3,800 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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In stock: 3800

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Specifications

MB88347LPFV Tech Specifications
Fujitsu Electronics America, Inc. - MB88347LPFV technical specifications, attributes, parameters and parts with similar specifications to Fujitsu Electronics America, Inc. - MB88347LPFV

Product Attribute Attribute Value
Part Number MB88347LPFV
Package DAC91001
Description DAC91001
Stock Condition Get 3800 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer Fujitsu
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

How does the MB88347LPFV handle clock synchronization in multi-device SPI systems, and what are the implications for timing margins?
The MB88347LPFV supports standard SPI communication with configurable clock polarity and phase, allowing flexible integration into master-slave topologies. However, due to its internal synchronous design, precise alignment of the serial clock (SCLK) edge relative to data sampling is critical. In systems with multiple peripherals sharing a bus, clock skew between devices can accumulate, especially over longer PCB traces. Engineers should ensure that SCLK rise/fall times remain within 10 ns to maintain reliable operation, and pull-up or pull-down resistors on unused lines may be necessary to prevent metastability. Proper layout and termination are essential to preserve setup and hold time margins below 500 ps under typical 3.3V conditions.
What voltage levels and supply sequencing requirements must be observed when integrating the MB88347LPFV with a 1.8V microcontroller?
The MB88347LPFV operates from a 2.7V to 3.6V power supply range, making it incompatible with direct interface to 1.8V logic without level translation. Attempting to drive inputs below VIL(max) = 0.8V may result in undefined states or increased susceptibility to noise. A bidirectional level shifter such as the TXB0104 or dedicated MOSFET-based translator is recommended for signal integrity. Additionally, power-up sequencing should ensure that VDD rises before any input signals are applied; violating this can stress ESD protection diodes. A soft-start or delayed enable scheme on the host MCU helps avoid transient current spikes during initialization.
Can the MB88347LPFV operate reliably at elevated ambient temperatures above 85°C, and what derating applies to its I/O specifications?
While the MB88347LPFV’s datasheet specifies an operating temperature range of -40°C to +85°C, extended use beyond 85°C may degrade parametric stability. At temperatures approaching 80°C, leakage currents on CMOS inputs can increase by up to 3×, potentially affecting high-impedance node behavior in low-power designs. Although absolute maximum ratings tolerate brief excursions to 100°C, continuous operation above 85°C without airflow or heat sinking risks functional failure. Thermal resistance from junction to ambient (θJA) for the TSOP16 package is approximately 120°C/W, so self-heating under moderate load could push die temperatures beyond safe limits if not managed.
How does the MB88347LPFV compare to the MB88347LPGV in terms of package thermal performance and pin compatibility?
Both the MB88347LPFV and MB88347LPGV share the same TSOP16 footprint and electrical interface, ensuring mechanical interchangeability in most layouts. However, the LPGV variant features a lead-free (RoHS-compliant) packaging with slightly improved solder joint reliability, while the LPFV uses conventional tin-lead finish. Thermally, there is negligible difference in θJA due to identical die size and bond wire configuration, but the LPGV’s higher melting-point solder may offer marginal benefit in reflow profiles near 260°C. For applications requiring automated optical inspection (AOI), the LPGV’s brighter surface finish enhances defect detection, whereas the LPFV may exhibit more visible flux residues post-reflow.
What precautions are necessary to prevent latch-up during hot-swapping of the MB88347LPFV-powered subsystem?
Latch-up risk in CMOS devices like the MB88347LPFV increases significantly when power rails rise faster than ground or when input pins experience voltage transients exceeding VCC + 0.5V. During hot insertion, parasitic thyristor structures can activate if the substrate potential diverges too much from the source. To mitigate this, series resistors (e.g., 10–100 Ω) on each signal line limit di/dt, and TVS diodes clamped to VCC and GND provide surge protection. Additionally, enabling power sequencing—ensuring VDD stabilizes before any I/O activity—prevents forward biasing of internal junctions. Without these measures, a single ESD event or sudden rail collapse could trigger a destructive low-impedance path requiring power cycling to recover.
Is it feasible to daisy-chain multiple MB88347LPFV units using daisy-chained SPI, and what limitations arise from propagation delays?
Daisy-chaining the MB88347LPFV via its SPI interface is technically possible if the host controller supports multi-drop mode and the total capacitive load remains below 50 pF. However, each device introduces approximately 15–20 ns of internal shift register delay, which compounds across chain length. For a four-device chain, worst-case latency exceeds 80 ns, potentially violating setup time requirements at high clock frequencies (>10 MHz). Moreover, bidirectional handshaking or status polling becomes complex since only one chip responds per transaction. Most implementations opt for individual chip selects instead, sacrificing pin count but ensuring deterministic timing and avoiding contention risks on MISO lines.
What impact does package warpage have on the MB88347LPFV during automated assembly, and how does this affect yield in surface-mount processes?
The MB88347LPFV comes in a thin TSOP16 package with a nominal body thickness of 1.2 mm, making it prone to warpage exceeding JEDEC Level 2 standards after reflow. Excessive curvature can cause tombstoning of adjacent passives or poor coplanarity during pick-and-place, leading to placement errors or head-in-paste defects. Boards with high layer counts or asymmetric copper distribution exacerbate this issue. Process engineers often apply vacuum nozzles with larger contact areas and adjust placement force to minimize stress. Post-reflow inspection using AOI helps catch misaligned packages early, but yield loss due to warpage typically ranges from 1–3% in mass production unless controlled via panel stiffening or optimized laminate selection.
How should decoupling capacitors be sized and placed for optimal stability when driving the MB88347LPFV from a noisy switching regulator?
The MB88347LPFV requires a 100 nF ceramic capacitor placed within 1 mm of the VDD pin to suppress high-frequency transients caused by digital switching. Additionally, a 10 µF bulk capacitor handles slower voltage droops from switching regulators. Placement must account for trace inductance—ideally, vias should connect the capacitor ground directly to the inner ground plane beneath the IC. Without proper decoupling, supply noise can couple into internal nodes, increasing jitter in data capture or causing unintended resets. In systems with multiple power domains, ferrite beads may isolate analog sections but must be evaluated against their DC drop and resonance frequency to avoid degrading startup characteristics.
What are the key differences between using the MB88347LPFV in synchronous versus asynchronous read/write modes, and how do they affect throughput?
The MB88347LPFV primarily operates in synchronous mode using SPI clocked transfers, where each byte is latched on the rising edge of SCLK. Asynchronous access is not supported; attempting to sample data without SCLK violates timing constraints and yields unreliable results. Throughput scales linearly with clock frequency up to the maximum rated speed of 20 MHz, limited by internal propagation delays and output enable times (~12 ns). In contrast, emulated asynchronous behavior using software delays cannot match hardware synchronization, resulting in reduced efficiency and increased CPU overhead. Therefore, full-speed operation mandates strict adherence to SPI timing diagrams and avoids reliance on polling loops for data readiness.
When replacing the MB88347LPFV in legacy firmware, what register mapping changes might be expected compared to similar Fujitsu parts like the MB88348LPFV?
The MB88347LPFV and MB88348LPFV share a common instruction set architecture but differ in memory organization and control register addresses. Specifically, the MB88348LPFV relocates the configuration block to offset 0x0C, while the MB88347LPFV uses 0x10. Firmware written for one may misconfigure peripheral settings when ported to the other. Additionally, interrupt vector tables vary slightly—the MB88347LPFV reserves IRQ #5 for SPI events, whereas the MB88348LPFV uses IRQ #6. Cross-referencing the respective errata sheets and mapping tables during migration is essential to avoid runtime faults or missed interrupts. Always verify checksum routines against the target model’s ROM layout before deployment.
What environmental sealing considerations apply if the MB88347LPFV is used in industrial enclosures exposed to humidity and dust?
The MB88347LPFV itself is not hermetically sealed and relies on conformal coating for moisture protection. In high-humidity environments (>85% RH), uncoated PCBs near the IC can suffer dendritic growth or corrosion at solder joints, especially if ionic contaminants are present. Applying acrylic, silicone, or urethane conformal coatings reduces absorption but must cure fully to prevent outgassing damage. Avoid dipping the entire board; selective spraying minimizes shadowing effects. For IP-rated enclosures, ensure gasketed covers prevent condensation ingress, and vent holes should include hydrophobic membranes. Regular visual inspection under magnification helps detect early signs of electrochemical migration around fine-pitch leads.
How does the MB88347LPFV’s power consumption scale with clock frequency, and what strategies reduce energy in battery-powered applications?
Dynamic power consumption of the MB88347LPFV approximates P = C × V² × f, where C ≈ 8 nF is the effective switched capacitance. At 3.3V and 1 MHz, typical current draw is ~1.2 mA; doubling the clock to 20 MHz increases consumption to ~24 mA due to faster state transitions. In sleep modes, leakage drops to sub-µA levels, but wake-up time adds latency. Energy-conscious designs disable clocks when idle, use burst transfers to minimize active duration, and coordinate with host MCU to enter stop modes between transactions. Duty cycling at <10% activity reduces average power to microamps, extending battery life significantly compared to continuous operation.
Are there known issues with the MB88347LPFV’s output drivers when driving long traces (>10 cm) without series termination?
Driving long traces with the MB88347LPFV’s push-pull outputs risks signal reflections due to impedance mismatch. The internal driver has a nominal output impedance of 20–30 Ω, while FR4 traces present 50–70 Ω characteristic impedance. Without series termination (e.g., 33 Ω resistor near the source), overshoot and undershoot can exceed VCC by 15%, potentially violating receiver thresholds on downstream devices. Even with pull-up resistors, ringing degrades eye diagram integrity at >5 MHz. Best practice includes using differential signaling alternatives or limiting trace lengths to <5 cm, or adding RC snubbers if termination isn’t feasible.
What role does the internal oscillator accuracy play in time-sensitive applications using the MB88347LPFV, and how does temperature drift affect timing budgets?
Although the MB88347LPFV lacks an integrated crystal oscillator, many variants incorporate a calibrated RC oscillator with ±2% initial tolerance and ±0.1%/°C drift. Over a 60°C operational span, this translates to ±6% frequency variation, equivalent to ±60 ppm error. For applications requiring microsecond-level precision (e.g., PWM generation), such drift accumulates rapidly—over 1 second, a 60 ppm deviation equals 60 ms error. Calibration routines or external compensation via temperature sensors can correct drift, but real-time adjustment adds complexity. Where absolute timing matters, pairing the IC with a TCXO or external crystal improves stability to ±1 ppm or better.
How should test points be implemented during debug of systems using the MB8347LPFV without compromising signal integrity?
Adding test pads to the VDD, GND, MISO, MOSI, and SCLK lines of the MB8347LPFV aids debug but must respect signal integrity principles. Test points should be no smaller than 0.8 mm diameter to allow probe contact, and via stubs must be minimized to prevent resonance at high frequencies. For differential signals, twin pads maintain coupling balance. Ground test points should connect directly to the local ground plane via multiple vias to avoid creating ground loops or antenna effects. Avoid placing test points near high-speed edges unless filtered with RC networks. Use spring-loaded pogo pins in production test fixtures instead of manual probes to reduce contact resistance and EMI pickup.
What are the consequences of violating tSU(min) and tHD(min) timing parameters during SPI writes to the MB88347LPFV?
Violating setup (tSU) or hold (tHD) times relative to SCLK edges causes indeterminate sampling of MOSI data, leading to corrupted writes or readbacks. For example, if tSU = 25 ns and SCLK transitions too soon after MOSI changes, the internal latch may capture a glitch or stale value. Similarly, insufficient hold time allows MOSI to change mid-cycle, violating recovery conditions. These violations manifest as intermittent failures that correlate with temperature or clock jitter, making them hard to reproduce. Oscilloscope captures often reveal data transitions overlapping clock edges by >5 ns, which exceeds spec. Ensuring clean, slow-rise-edge clocks (<5 ns) and minimizing trace skew resolves most timing-related instability.
Can the MB88347LPFV be used in radiation-hardened environments, and what mitigation strategies apply?
The MB88347LPFV is not qualified for space or high-radiation applications and lacks SEU (single-event upset) hardening. Total ionizing dose (TID) tolerance is unspecified but likely below 10 krad(Si); exposure can shift threshold voltages and degrade performance over time. Single-event functional interrupts (SEFIs) may occur during heavy-ion strikes, causing spontaneous resets or register corruption. Mitigation includes using EDAC-protected memory, triple modular redundancy for critical functions, and shielding with tantalum or aluminum. For terrestrial aerospace use, selecting a rad-hard equivalent like the RH850 family is preferable. If unavoidable, periodic watchdog resets and ECC checks improve robustness but add latency and area overhead.
What is the recommended method for validating firmware compatibility when transitioning from simulation models to physical MB88347LPFV evaluation boards?
Simulation models of the MB88347LPFV often idealize parasitics and ignore process corners, leading to optimistic timing predictions. To validate firmware, start with benchtop characterization using a logic analyzer and oscilloscope to measure actual rise times, propagation delays, and glitch rates under worst-case loads (e.g., 50 pF cap + 1 kΩ pull-up). Compare captured waveforms against the datasheet’s timing diagrams, focusing on tPD from CLK to DOUT and tDIS from CS# negation to valid output. Then exercise boundary scan and stress test under temperature cycling (-20°C to +85°C) to expose marginal cases. Only after confirming consistent behavior across multiple samples should production firmware be locked in.

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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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Fujitsu Electronics America, Inc.

MB88347LPFV

Fujitsu Electronics America, Inc.
32D-MB88347LPFV

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