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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Infineon Technologies CY7C028V-20AXCT

Name: CY7C028V-20AXCT
Brand: Infineon Technologies
SKU: CY7C028V-20AXCT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY7C028V-20AXCT

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 100-LQFP

Datasheet:: CY7C028V-20AXCT.pdf

Description:: IC SRAM 1MBIT PARALLEL 100TQFP

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Inventory:4,699

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Product details

Overview

CY7C028V-20AXCT from Infineon Technologies is a 256K × 16-bit asynchronous CMOS static RAM (SRAM) with 20 ns access time, 3.3 V supply voltage, and industrial temperature range (–40°C to +85°C). It features three-state outputs, byte-wide write control (UB/LB), and TTL-compatible inputs for embedded microcontroller interfacing in real-time data buffering applications.

For engineers reviewing the CY7C028V-20AXCT datasheet, CY7C028V-20AXCT pinout, CY7C028V-20AXCT application, or CY7C028V-20AXCT equivalent, key selection criteria include access time consistency under varying load, low active power (120 mW typical), and compatibility with legacy 16-bit bus architectures requiring non-multiplexed address/data interfaces.

Technical Context

This SRAM implements a full parallel interface with independent address latching and no internal refresh circuitry-requiring external address stability during read/write cycles. Its dual-byte write enable (UB/LB) supports 8-bit sub-word writes without read-modify-write overhead.

The device uses standard CMOS process technology with Schmitt-trigger inputs for noise immunity and incorporates power-down mode (≤1 µA standby current) activated by disabling chip select (CE1 high or CE2 low), making it suitable for battery-backed systems where data retention during sleep is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	256K × 16-bit = 4 Mbit total capacity; supports 16-bit data bus without byte-swapping logic.
Access Time	20 ns max at V_CC = 3.3 V ± 0.3 V; ensures timing closure with 50 MHz bus clocks in synchronous glue logic designs.
Supply Voltage	3.3 V ± 0.3 V; compatible with modern low-voltage microcontrollers and FPGA I/O banks without level translation.
Operating Temperature	–40°C to +85°C; qualified for industrial control and automotive body electronics environments.
Standby Current	≤1 µA in power-down mode; enables multi-year data retention in coin-cell–powered backup systems.
Write Cycle Time	20 ns min; matches access time for single-cycle write operations without wait states.
Input Compatibility	TTL-level input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V); interoperable with legacy 5 V logic driving 3.3 V-tolerant inputs via pull-up or series resistor.

Pinout & Package

Supplied in a 54-pin TSOP II (Thin Small Outline Package) with 0.8 mm pitch, JEDEC MO-141AC compliant, lead-free and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
A0–A17	Address Inputs	18-bit address bus supporting full 256K word addressing; no multiplexing required.
DQ0–DQ15	Data I/O Lines	Bidirectional 16-bit data bus with three-state output drivers controlled by OE and CE.
CE1, CE2	Chip Enable Inputs	Active-low dual-enable logic: device enabled only when CE1 = LOW and CE2 = HIGH.
OE	Output Enable	Controls data bus drivers; high-Z state when OE = HIGH, regardless of CE status.
WE	Write Enable	Active-low signal initiating write cycle; sampled on rising edge of CE/WE overlap.
UB, LB	Upper/Lower Byte Write Enable	Independent 8-bit write control: UB enables DQ8–DQ15, LB enables DQ0–DQ7.
V_CC, V_SS	Power & Ground	Single 3.3 V supply; separate V_SS pins per byte group reduce ground bounce in high-speed writes.

Key Features

Feature	Design Value
Fast 20 ns access time	Enables zero-wait-state operation with 50 MHz microcontrollers and DSPs using parallel memory interfaces.
Byte-wide write control (UB/LB)	Eliminates need for external byte masking logic or read-modify-write sequences during partial-word updates.
Low-power power-down mode	Reduces standby current to ≤1 µA, extending battery life in uninterruptible RAM buffer applications.
TTL-compatible inputs	Accepts 5 V-tolerant signals without external level shifters, easing integration into mixed-voltage legacy systems.
Industrial temperature range	Validated operation from –40°C to +85°C ensures reliability in motor drives, PLCs, and transportation control units.

Applications

Industrial PLC Data Buffer

Automotive Body Control Module

Use Scenario: Real-time logging of sensor inputs and actuator commands in programmable logic controllers with deterministic scan cycles.

IC Role / Device Role / Timing Role: Asynchronous SRAM providing non-blocking read/write access for dual-port-like behavior via external arbitration.

Use Value: 20 ns access time ensures data capture within tight 100 µs I/O scan windows without CPU intervention or DMA stalls.

Use Scenario: Storing configuration parameters and fault history in vehicle door modules with intermittent power loss.

IC Role / Device Role / Timing Role: Non-volatile data retention support via external battery backup and ultra-low standby current.

Use Value: ≤1 µA power-down current enables >5-year data retention on CR2032 coin cell without recharge circuitry.

Medical Imaging Frame Buffer

Test & Measurement Equipment

Use Scenario: Temporary storage of digitized ultrasound frames before compression and transmission over USB or Ethernet.

IC Role / Device Role / Timing Role: High-bandwidth parallel interface acting as first-stage frame buffer between ADC and processor subsystem.

Use Value: 16-bit bus width and 20 ns timing allow sustained 50 MB/s throughput matching 12-bit, 40 MSPS ADC output rates.

Use Scenario: Capturing transient waveforms in digital oscilloscopes with deep memory and real-time triggering.

IC Role / Device Role / Timing Role: Standalone SRAM used in acquisition memory subsystem with independent read/write address counters.

Use Value: Dual-byte write enables selective update of trigger metadata without disturbing active waveform capture buffers.

Equivalent & Alternatives

The following parts are listed as comparable options for similar asynchronous SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IS61LV25616AL-10TLI	10 ns access time, 3.3 V, same density and pinout; higher speed but tighter timing margins.	Requires faster clock domain synchronization and stricter PCB layout for signal integrity.	Select when system timing budget allows sub-15 ns latency and board design supports 100+ MHz trace routing.
AS6C4008-20TIN	20 ns access, 3.3 V, but 512K × 8-bit organization; different bus width and pin assignment.	Needs external byte-to-word alignment logic or software remapping for 16-bit data path compatibility.	Choose only if existing design accommodates 8-bit data interface or can reassign DQ lines across two devices.

Compared with IS61LV25616AL-10TLI and AS6C4008-20TIN, the CY7C028V-20AXCT offers balanced performance and drop-in compatibility for industrial 16-bit bus systems-delivering proven 20 ns timing margin, industrial temp qualification, and minimal layout impact without requiring redesign of address/data routing or power sequencing.

Availability

CY7C028V-20AXCT is available at Aetrix Electronics and suitable for industrial PLC data buffering, automotive body control modules, medical imaging frame storage, and test & measurement equipment requiring stable component supply across extended production lifecycles.

Supply support for CY7C028V-20AXCT 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and memory solutions, with global manufacturing and quality certification to ISO/TS 16949 and AEC-Q100 standards.

CY7C028V-20AXCT belongs to Infineon's legacy Cypress SRAM product line, designed specifically for high-reliability, low-latency parallel memory interfacing in industrial automation and automotive electronics where long-term availability and consistent timing behavior are critical.

FAQ

Is CY7C028V-20AXCT pin-compatible with CY7C1021DV33?

No. CY7C1021DV33 is a 64K × 16-bit SRAM in 44-pin SOJ package with different pinout, address count (A0–A15), and timing specifications (25 ns access). The CY7C028V-20AXCT uses 54-pin TSOP II and requires A0–A17; direct replacement would necessitate PCB redesign and firmware address mapping changes.

Does CY7C028V-20AXCT support battery backup operation?

Yes. When V_CC drops below V_CC(min) (typically 2.0 V), the device enters data retention mode with ≤1 µA current draw, preserving stored data as long as V_CC remains ≥1.5 V-enabling seamless handover to external backup battery or supercapacitor circuits without data loss.

Can CY7C028V-20AXCT be used with 5 V microcontrollers?

Yes, with caution. All inputs are TTL-compatible (V_IH ≥ 2.0 V, V_IL ≤ 0.8 V), so 5 V logic outputs can drive address/control pins directly. However, outputs are 3.3 V CMOS levels; interfacing to 5 V receivers requires either 3.3 V-tolerant inputs or external level-shifting for DQ lines.

What is the maximum operating frequency of the address bus?

The address bus has no clock-operation is asynchronous. Maximum reliable toggle rate depends on access time and cycle time: minimum address setup/hold times are 8 ns each, allowing stable operation up to ~25 MHz address transition rate when paired with appropriate controller timing constraints and PCB trace length matching.

CY7C028V-20AXCT Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 100-LQFP

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Volatile

Memory Format:: SRAM

Technology:: SRAM - Dual Port, Asynchronous

Memory Size:: 1Mbit

Memory Organization:: 64K x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 20ns

Access Time:: 20 ns

Voltage - Supply:: 3V ~ 3.6V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 100-TQFP (14x14)

CY7C028V-20AXCT FAQ

1.How can I place an order for CY7C028V-20AXCT through Aetrix?

Please submit a Request for Quotation (RFQ) for CY7C028V-20AXCT 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 CY7C028V-20AXCT reliable?

The price and inventory of CY7C028V-20AXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C028V-20AXCT is usually 5 days.

3.What payment methods are accepted for CY7C028V-20AXCT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C028V-20AXCT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY7C028V-20AXCT?

CY7C028V-20AXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY7C028V-20AXCT 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 CY7C028V-20AXCT?

For technical support, including CY7C028V-20AXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C028V-20AXCT requirements.

6.How does Aetrix verify that CY7C028V-20AXCT is sourced from the original manufacturer or authorized distributors?

All CY7C028V-20AXCT 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 CY7C028V-20AXCT meets industry standards.

7.What is the process for return or replacement of CY7C028V-20AXCT?

All CY7C028V-20AXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C028V-20AXCT, 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 CY7C028V-20AXCT part is unused and in its original packaging.

Return procedure for CY7C028V-20AXCT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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