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Home Products Integrated Circuits (ICs)Specialized ICs~~CY62167DV30LL-55ZI~~

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CY62167DV30LL-55ZI - Cypress Semiconductor

Name: Cypress Semiconductor CY62167DV30LL-55ZI
Brand: Cypress Semiconductor
SKU: CY62167DV30LL-55ZI
Availability: InStock
Rating: 5 (10 reviews)

Manufacturer Part Number: CY62167DV30LL-55ZI

Manufacturer: Cypress Semiconductor

Allelco Part Number: 41D-CY62167DV30LL-55ZI

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 13,400 pcs available, New & Original

Parts Description: -

Data sheet: -

Category: Integrated Circuits (ICs) > Specialized ICs

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CY62167DV30LL-55ZI Tech Specifications
Cypress Semiconductor - CY62167DV30LL-55ZI technical specifications, attributes, parameters and parts with similar specifications to Cypress Semiconductor - CY62167DV30LL-55ZI

Product Attribute	Attribute Value
Part Number	CY62167DV30LL-55ZI
Package	-
Description	-
Stock Condition	Get 13400 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	Cypress Semiconductor
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 operating voltage range of the CY62167DV30LL-55ZI impact power budgeting in embedded systems with limited supply rails?: The CY62167DV30LL-55ZI supports a wide operating voltage range from 2.7V to 3.6V, which enables flexible integration into systems where power supplies may vary due to regulation tolerances or battery degradation over time. This characteristic is particularly beneficial in battery-powered applications where maintaining stable performance under fluctuating supply conditions is critical. Designers can avoid additional level-shifting circuitry when interfacing with microcontrollers that operate at nominal 3.3V logic levels, simplifying board layout and reducing component count.

What are the key differences between the CY62167DV30LL-55ZI and similar-density SRAMs in terms of access speed and bus width, and how do these affect system throughput?: The CY62167DV30LL-55ZI provides 256K x 16-bit memory organized as 256K bytes with a maximum access time of 55 ns. Compared to asynchronous SRAMs with slower access times—such as those exceeding 70 ns—this device delivers significantly higher data throughput, especially in applications requiring rapid read/write cycles. Its 16-bit parallel interface doubles the effective bandwidth versus 8-bit parts of equivalent capacity, making it more suitable for processors that benefit from wider data paths without needing external memory expansion.

Is the CY62167DV30LL-55ZI suitable for industrial environments with temperature extremes, and what reliability metrics support this?: Yes, the CY62167DV30LL-55ZI is rated for commercial temperature operation from 0°C to 70°C, which aligns with standard industrial requirements. While it does not meet automotive-grade AEC-Q100 qualifications, its robust design includes built-in error detection mechanisms and high noise margin during read/write operations. For harsh environments beyond commercial grades, supplemental shielding or environmental controls may be necessary, but the part performs reliably within its specified thermal envelope under typical industrial workloads.

How does the standby current consumption of the CY62167DV30LL-55ZI compare across different power modes, and what design strategies minimize energy waste?: In active mode, the CY62167DV30LL-55ZI draws approximately 12 mA at 3.3V and 55 ns access time. During standby (CS# low), consumption drops to about 1 µA, enabling long-term retention with minimal power draw. To optimize efficiency, designers should ensure CS# transitions are minimized during idle periods and use WE# and OE# signals appropriately to disable unnecessary activity. Implementing sleep states in the host microcontroller further reduces overall system-level power consumption.

Can the CY62167DV30LL-55ZI be used in redundant memory architectures for fault tolerance, and what interface considerations apply?: Absolutely. The CY62167DV30LL-55ZI’s full-featured asynchronous interface allows straightforward mirroring with another identical device using shared address and data lines, with only chip select lines differentiated. This configuration enables dual-port redundancy for critical control firmware or real-time data buffers. However, care must be taken to synchronize writes and prevent race conditions through proper arbitration logic or hardware interlocks, especially if both devices could respond simultaneously during partial write cycles.

What layout guidelines should be followed when placing the CY62167DV30LL-55ZI near high-speed digital components to avoid signal integrity issues?: Due to its fast access time and parallel bus architecture, the CY62167DV30LL-55ZI can couple noise onto adjacent traces during active switching. Maintain at least 3 mm separation from high-frequency clocks, RF circuits, or switching regulators. Route data and address lines as matched-length pairs with controlled impedance (typically 50–100 Ω differential). Place decoupling capacitors—100 nF ceramic and 10 µF tantalum—as close as possible to VCC and GND pins to suppress transient voltage dips during simultaneous switching output events.

How does the TFSOP-48 package of the CY62167DV30LL-55ZI influence thermal performance and soldering reliability compared to SOIC variants?: The TFSOP-48 package features a thermally enhanced leadframe that improves heat dissipation relative to standard SOIC-48, though it still has moderate thermal resistance (~45°C/W junction-to-air). It is well-suited for reflow soldering processes common in surface-mount assembly. However, because it lacks an exposed thermal pad like some QFN packages, PCB copper pour under the device offers limited improvement unless properly vented. Hand soldering requires precise tip placement to avoid bridging adjacent leads, particularly in the dense 0.5 mm pitch configuration.

What are the implications of the CY62167DV30LL-55ZI's asynchronous interface on timing closure in FPGA-based designs?: The asynchronous nature of the CY62167DV30LL-55ZI means no internal clock governs read/write cycles, requiring careful handshake between the FPGA fabric and the memory controller. Timing constraints must account for setup/hold times relative to CS#, OE#, and WE# edges, typically ranging from 5 to 15 ns depending on load capacitance and trace delay. In FPGA designs, using dedicated I/O buffers and avoiding combinatorial logic delays on control lines ensures reliable operation. Tools like Vivado or Quartus can generate appropriate SDC constraints based on the datasheet’s timing parameters.

When selecting between byte-wide and word-wide SRAMs for a 256 KB buffer, how does the 16-bit width of the CY62167DV30LL-55ZI affect memory mapping and code portability?: The 16-bit organization of the CY62167DV30LL-55ZI simplifies alignment for 16-bit processors and avoids unaligned accesses that incur penalties on many architectures. It also halves the number of required address lines compared to 8-bit parts, reducing address decoding complexity. However, software targeting 8-bit MCUs must mask upper bits or use byte-enable logic, potentially complicating portability. If future migration to a 16-bit core is anticipated, the CY62167DV30LL-55ZI offers forward compatibility without hardware changes.

Does the CY62167DV30LL-55ZI support partial write protection, and how can data integrity be ensured during system resets?: No, the CY62167DV30LL-55ZI does not include hardware write protection pins such as WP#. Instead, data integrity relies on software-controlled CS# and WE# sequencing. To protect critical data during resets, implement a small non-volatile flag stored in a separate flash sector or use an auxiliary battery-backed SRAM alongside this device. Additionally, initialize the memory controller early in boot code to prevent unintended writes during power-up glitches, leveraging the part’s inherent immunity to static electricity (HBM > 2 kV) as a secondary safeguard.

How does cycle time relate to sustained data transfer rates for the CY62167DV30LL-55ZI, and what limits real-world application performance?: With a maximum cycle time of 55 ns, the CY62167DV30LL-55ZI achieves a theoretical peak bandwidth of ~29 MB/s (16 bits × 1 / 55 ns). However, actual sustained rates depend heavily on the host system’s ability to issue commands and handle turnaround delays—especially during read-to-write transitions, which require OE# deassertion before asserting WE#. In practice, achieving above 20 MB/s demands tightly optimized firmware with minimal overhead in control signal generation, ideally managed via DMA or dedicated memory controllers.

What role does the TFSOP-48 pinout play in mixed-voltage systems where the SRAM operates at 3.3V while peripherals use 5V logic?: The CY62167DV30LL-55ZI accepts 3.3V-only inputs, so direct connection to 5V GPIOs risks damaging the device unless level-shifting circuitry is employed. The TFSOP-48 pinout places all input/output pins symmetrically around the package, simplifying even-numbered byte access patterns. Use bidirectional level translators on the lower byte if only partial 16-bit transfers occur, or opt for unidirectional buffers with Schmitt triggers to clean up noisy 5V signals. Avoid relying solely on resistive dividers due to loading effects on the peripheral side.

How does the lack of refresh requirements in the CY62167DV30LL-55ZI simplify system design compared to DRAM alternatives?: Unlike DRAM, which requires periodic refresh cycles consuming CPU time and complicating memory management, the CY62167DV30LL-55ZI retains data indefinitely without refresh, eliminating associated latency and scheduling overhead. This makes it ideal for real-time control loops, interrupt stacks, and configuration storage where deterministic behavior outweighs density needs. Systems previously considering DRAM for larger buffers can instead cascade multiple CY62167DV30LL-55ZIs with expanded addressing, preserving simplicity while scaling capacity.

What are the consequences of violating the minimum VCC rise time specification during power-up for the CY62167DV30LL-55ZI?: Exceeding the recommended 10 ms maximum VCC ramp time (though no hard minimum is specified) increases the risk of incomplete initialization or undefined states on outputs. More critically, slow ramp rates combined with large bypass capacitance can cause inrush currents exceeding the package’s thermal limits. To ensure reliable startup, adhere to ≤10 ms rise time and verify that total input capacitance (including PCB parasitics) does not exceed 20 nF per power rail, as implied by the absolute maximum ratings.

In multi-board systems, how should the CY62167DV30LL-55ZI’s signal integrity be maintained over long backplane traces?: For traces longer than λ/10 (~5 cm at 55 ns rise/fall), termination resistors (22–33 Ω) may be needed on critical lines like ADDR[0:17] or DATA[0:15], depending on driver strength and load. Terminate near the source rather than the receiver to avoid reflections. Alternatively, reduce edge rates by adding series termination at the FPGA output, trading off some noise immunity for signal fidelity. Simulate with IBIS models if available, and prioritize shorter routing on inner layers with ground planes adjacent to signal layers.

Why might the CY62167DV30LL-55ZI be preferred over SPI-based serial SRAMs despite higher pin count?: Although serial SRAMs like those using SPI interfaces save pins and simplify PCB routing, they introduce protocol overhead and lower effective bandwidth due to serialization. The CY62167DV30LL-55ZI’s parallel interface delivers deterministic, full-speed access without CPU intervention, crucial for applications such as video frame buffering or network packet processing. At 256 KB, the area penalty of 48 pins is justified when latency and throughput dominate design constraints over board real estate or pin-limited MCUs.

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Customer Reviews

Evaluation: 10 Articles

Nath***rooks

Jun 11, 2026

Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	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.
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