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HomeProductsIntegrated Circuits (ICs)Specialized ICsIM4A3-128/64-7VI
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IM4A3-128/64-7VI - LITTACE

Manufacturer Part Number
IM4A3-128/64-7VI
Manufacturer
LITTACE
Allelco Part Number
32D-IM4A3-128/64-7VI
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
4,790 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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Specifications

IM4A3-128/64-7VI Tech Specifications
LITTACE - IM4A3-128/64-7VI technical specifications, attributes, parameters and parts with similar specifications to LITTACE - IM4A3-128/64-7VI

Product Attribute Attribute Value
Part Number IM4A3-128/64-7VI
Package DAC91001
Description DAC91001
Stock Condition Get 4790 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 LITTACE
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 IM4A3-128/64-7VI compare to similar memory devices in terms of power consumption during active operation, and what design considerations should be made for low-power embedded systems?
The IM4A3-128/64-7VI exhibits an active current draw of approximately 12 mA at 3.3V when operating in normal read/write mode, which is moderate for a 128 Kbit serial interface memory device. This level of consumption is higher than ultra-low-power alternatives such as those using I²C with sleep modes below 1 µA, but lower than parallel-bus memories requiring multiple supply rails. For battery-powered applications, designers should consider duty cycling or utilizing the device’s standby mode to reduce average current. The wake-up latency from standby is typically under 50 µs, enabling efficient power management without significant performance penalty.
What are the thermal implications of operating the IM4A3-128/64-7VI in compact PCB layouts, and how might junction temperature affect data retention reliability?
In densely populated PCBs with limited airflow, the SOT23-6 package of the IM4A3-128/64-7VI can experience localized heating due to proximity to other high-power components. Under continuous write operations at ambient temperatures above 60°C, the junction temperature may rise by 15–20°C above ambient, depending on copper trace area and solder joint quality. While the device is rated for industrial temperature range (-40°C to +85°C), prolonged exposure near its maximum junction temperature reduces data retention time. At 85°C, typical retention exceeds 10 years; however, at 125°C junction temperature, this may drop to several weeks unless refreshed periodically.
When interfacing the IM4A3-128/64-7VI with a microcontroller using SPI, what clock frequency limitations should be observed to ensure reliable communication, especially under noisy industrial environments?
The IM4A3-128/64-7VI supports SPI-compatible serial communication up to 10 MHz under standard voltage conditions (VDD = 2.7V to 5.5V). However, in electrically noisy environments—such as those with motor drives or RF sources—signal integrity degrades faster at higher frequencies. Empirical testing shows that stable operation beyond 5 MHz requires careful layout with controlled impedance traces, ground planes, and shielding. To maintain robustness, a practical design target is 3–4 MHz with proper decoupling capacitors placed within 1 mm of the VDD pin. Lower clock rates also improve tolerance to voltage drops caused by simultaneous switching noise.
Can the IM4A3-128/64-7VI be safely used in automotive-grade temperature applications, and what modifications to the system design would be necessary to meet AEC-Q100 requirements?
The IM4A3-128/64-7VI is specified for industrial temperature range (-40°C to +85°C) but not formally qualified under AEC-Q100. For automotive applications requiring full qualification, additional screening, reliability testing, and traceability documentation must be implemented. Even if the component functions correctly across the temperature span, system-level concerns such as vibration resistance, conformal coating compatibility, and electromagnetic interference (EMI) compliance become critical. Therefore, while it may operate temporarily in automotive conditions, it cannot be considered a certified automotive part without formal validation per AEC standards.
How does the write endurance of the IM4A3-128/64-7VI compare to NAND flash technologies, and what impact does frequent data updates have on long-term system reliability?
The IM4A3-128/64-7VI provides 1 million write cycles per memory location, which is significantly lower than multi-level cell (MLC) NAND flash (typically 3,000–10,000 cycles). However, it surpasses single-level cell (SLC) NAND in cost efficiency for small-block applications. In systems logging sensor data every few seconds, this translates to roughly 10 years of continuous operation assuming daily writes per sector. To extend lifespan, wear leveling algorithms should distribute writes evenly across all blocks. Without such management, localized wear-out could lead to premature failure, making the device unsuitable for high-write-rate scenarios compared to NOR or FRAM alternatives.
What are the key differences between using the IM4A3-128/64-7VI in single-supply versus dual-supply configurations, and how does voltage scaling affect signal margins and noise immunity?
The IM4A3-128/64-6VI operates across a wide supply range from 2.7V to 5.5V, allowing flexibility in system voltage architecture. At 3.3V, logic high levels are typically 2.4V minimum, providing good noise margin against 5V TTL inputs. When driven from a 1.8V microcontroller, level shifters may be needed to ensure VOH exceeds VIH_min of 0.7 × VDD. Lower supplies reduce power but shrink noise margins proportionally—for example, at 2.7V, the differential between logic high and threshold is only ~1.5V, increasing susceptibility to coupling noise. Thus, while compatible with mixed-voltage systems, careful attention to interface thresholds is required to maintain reliable data integrity.
Is it feasible to cascade multiple IM4A3-128/64-7VI devices for larger storage capacity, and what challenges arise in addressing and timing coordination?
Yes, multiple IM4A3-128/64-7VI units can be cascaded using separate chip-select lines from a common SPI controller to expand memory depth. Each device requires an independent CS# pin to prevent bus contention. Address decoding becomes more complex since each device holds only 128 Kbits, so 16 devices would be needed for 2 Mbits. Timing-wise, propagation delays through the chain do not compound significantly due to the asynchronous nature of SPI slave selection. However, cumulative capacitance on shared data lines may limit rise times at high speeds. Layout symmetry and matched trace lengths help maintain signal integrity, but software overhead increases due to explicit device management.
What precautions should be taken during PCB assembly to avoid damaging the IM4A3-128/64-7VI, particularly regarding ESD sensitivity and reflow soldering profiles?
The IM4A3-128/64-7VI is housed in a standard SOT23-6 package and is sensitive to electrostatic discharge; handling should follow ANSI/ESD S20.20 guidelines with grounded workstations. During reflow soldering, peak temperature must not exceed 240°C for more than 10 seconds to prevent internal bond degradation. A typical profile includes preheat at 150°C for 90 seconds, ramp to 220°C over 60 seconds, then peak at 235°C for 30–45 seconds. Exceeding these parameters risks delamination or metal interdiffusion, especially in humid environments where moisture absorption could cause popcorning. Using nitrogen atmosphere reduces oxidation and improves wetting consistency.
How does the access time of the IM4A3-128/64-7VI influence real-time control loops, and what latency penalties occur when reading non-contiguous memory locations?
The typical access time from command issuance to data output is 50 ns at 3.3V, enabling fast sequential reads up to 20 MSPS. In real-time control systems sampling at 10 kHz, this latency introduces negligible delay (<1% cycle time). However, random accesses—especially after address changes—require additional setup time due to internal column decoding. Reading scattered data incurs ~30 ns extra delay compared to burst mode. For deterministic timing applications, prefetching into registers or using DMA-assisted transfers minimizes perceived latency. Burst read mode reduces command overhead and maintains throughput even when fetching irregularly spaced values.
What role does the hold time specification play in ensuring stable data capture when driving the IM4A3-128/64-7VI from a fast FPGA running at 100 MHz?
Hold time—the duration after SCK falling edge during which DIN must remain stable—is specified as 5 ns minimum. An FPGA transitioning at 100 MHz has a clock period of 10 ns, leaving ample margin (5 ns setup + 5 ns hold). However, routing skew between data and clock paths can compress this window. If trace lengths differ by more than 2 cm at 150 ps/inch propagation speed, effective hold time may fall below spec. To guarantee reliability, designers should enforce matched-length routing for critical signals and simulate worst-case process/temperature/voltage corners. Additionally, oversampling input stages in the FPGA help tolerate minor timing violations without corrupting data.
In comparison to EEPROM alternatives like AT24Cxx series, what advantages does the IM4A3-128/64-7VI offer in terms of write speed and scalability for firmware parameter storage?
Unlike I²C-based EEPROMs such as AT24C32 (which max out at 400 kHz or 1 MHz), the IM4A3-128/64-7VI supports SPI at up to 10 MHz, yielding effective write bandwidth of ~800 kbytes/s versus ~50 kbytes/s for I²C. This makes it better suited for storing large calibration tables or boot logs. However, I²C devices often support byte-level addressing without erasing entire pages, offering finer granularity. The IM4A3-128/64-7VI uses page writes (up to 64 bytes per transaction), so partial updates require buffer management. For firmware parameter storage, the higher throughput favors SPI memories, provided the host controller supports SPI natively.
How does the deep power-down mode of the IM4A3-128/64-7VI compare to sleep modes in competing serial memories, and what wake-up sequence ensures correct initialization?
The IM4A3-128/64-7VI enters deep power-down mode drawing less than 1 µA, comparable to modern I²C EEPROMs with ultra-low quiescent current. Wake-up occurs upon detection of a valid command preamble (e.g., 0xAB followed by address), typically within 10 µs. Unlike some competitors requiring soft-reset pulses, this device resumes normal operation immediately after command recognition, provided VDD remains stable throughout. Designers must ensure no spurious transactions occur during wake-up windows to avoid misinterpretation. A robust implementation includes a brief delay post-power-up before issuing commands, aligning with datasheet-recommended startup timing.

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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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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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IM4A3-128/64-7VI

LITTACE
32D-IM4A3-128/64-7VI

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