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Infineon Technologies CY7C1021DV33-10VXIT
- Part No.:
- CY7C1021DV33-10VXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021DV33-10VXIT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:895
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Product details
Overview
CY7C1021DV33-10VXIT from Cypress Semiconductor is a 1-Mbit (64 K × 16) high-speed CMOS static RAM with 10 ns access time, 3.3 V supply, industrial/automotive-A temperature range (–40 °C to +85 °C), and automatic CE-controlled power-down. It supports independent byte-wide writes via BHE/BLE, operates with low active current (60 mA), and retains data at 2.0 V - used in real-time control buffers and legacy microprocessor memory expansion.
For engineers reviewing the CY7C1021DV33-10VXIT datasheet, CY7C1021DV33-10VXIT pinout, CY7C1021DV33-10VXIT application, or CY7C1021DV33-10VXIT equivalent, key selection criteria include tAA ≤ 10 ns, ISB2 ≤ 3 mA standby current, dual-byte enable architecture, and Pb-free 44-pin SOJ package compatibility with legacy SRAM sockets.
Technical Context
The CY7C1021DV33-10VXIT implements a synchronous, non-volatile-retentive CMOS SRAM array organized as 65,536 × 16 bits with fully decoded address logic and bidirectional I/Os. Its read/write timing is governed by overlapping CE/WE/OE/BHE/BLE control signals, with separate low-Z enable paths for upper (I/O8–I/O15) and lower (I/O0–I/O7) bytes.
Power management relies on automatic CE-driven transition into CMOS standby mode (ISB2 = 3 mA), triggered when CE is HIGH and inputs are within valid TTL/CMOS voltage thresholds. Data retention at 2.0 V requires CE > VCC – 0.3 V and stable bias conditions, with tCDR = 0 ns and tR ≥ 50 µs for full operational recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64 K × 16 (1,048,576-bit total); enables 16-bit parallel bus interfacing without external data multiplexing |
| Access Time (tAA) | 10 ns max; guarantees deterministic read latency for 100 MHz bus cycles in microcontroller co-processor systems |
| VCC Supply | 3.3 V ± 0.3 V; compatible with standard LVTTL and LVCMOS I/O domains, not 5 V tolerant |
| Operating Temperature | –40 °C to +85 °C (Industrial/Automotive-A grade); validated for under-hood and factory-floor embedded environments |
| Standby Current (ISB2) | 3 mA max at VCC = 3.3 V; achieved only with CMOS-level input thresholds and CE HIGH, enabling low-power sleep modes |
| Data Retention Voltage | 2.0 V min; allows battery-backed operation during main supply brownout without data loss |
| Package | 44-pin 400-mil wide molded SOJ (VXIT suffix); pinout matches JEDEC MS-025AC, suitable for wave-soldered legacy PCBs |
Pinout & Package
Package: 44-pin 400-mil wide molded SOJ (Small Outline J-lead), Pb-free, RoHS-compliant, body width 400 mil (10.16 mm), lead pitch 0.05 inch (1.27 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus; fully decoded to select one of 65,536 words; no internal latching |
| I/O0–I/O7 | Lower-Byte Bidirectional Data | Driven during write when BLE = LOW; tri-stated when BLE = HIGH or CE = HIGH or OE = HIGH |
| I/O8–I/O15 | Upper-Byte Bidirectional Data | Driven during write when BHE = LOW; independent enable allows 8-bit sub-word writes without affecting adjacent byte |
| CE | Chip Enable | Active-LOW global select; initiates automatic power-down when HIGH and all inputs meet CMOS thresholds |
| WE | Write Enable | Active-LOW write strobe; must be LOW concurrently with CE and BHE/BLE to initiate write cycle |
| OE | Output Enable | Active-LOW output gate; controls Z-state of I/O pins independently of CE during read operations |
| BLE / BHE | Byte Low/High Enable | Independent active-LOW enables for lower/upper data bytes; support mixed-width bus interfacing and partial writes |
| VCC / VSS | Power / Ground | Two VCC (pins 1, 44) and two VSS (pins 23, 24) pins reduce IR drop and switching noise in high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent byte enables (BLE/BHE) | Enables 8-bit writes to either half of the 16-bit word without disturbing the other byte - critical for mixed-data-width peripherals |
| Automatic CE-controlled power-down | Reduces ICC to 3 mA (ISB2) with no external control logic required - simplifies low-power system design |
| 2.0 V data retention | Maintains stored contents during brownout or backup-battery operation without refresh - supports fail-safe logging |
| 10 ns access time with 3.3 V supply | Meets timing requirements of 100 MHz CPU buses (e.g., Intel 80486, Motorola 68040 derivatives) without wait states |
| Pb-free 44-pin SOJ package | Direct drop-in replacement for legacy CY7C1021CV33 designs; compatible with existing reflow/wave solder profiles |
Applications
| Industrial PLC Memory Buffer | Automotive Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Stores real-time sensor fusion results and actuator command queues in programmable logic controllers with deterministic scan cycles. IC Role / Device Role / Timing Role: High-reliability, low-latency scratchpad memory interfaced directly to 16-bit microcontrollers (e.g., Renesas SH-2) with strict tAA ≤ 10 ns timing. Use Value: Enables zero-wait-state execution of control algorithms while maintaining data integrity across thermal cycling from –40 °C to +85 °C. |
Use Scenario: Holds calibration tables and transient fault logs in engine control modules where power interruption may occur during cranking. IC Role / Device Role / Timing Role: Non-refreshing data retention memory operating at 2.0 V during battery dip events; accessed via MPC5xx CAN-capable MCUs. Use Value: Preserves critical diagnostic data during 12 V supply sag below 2.5 V, eliminating need for external backup capacitors or supervisory ICs. |
| Legacy Medical Imaging Frame Buffer | Avionics Display Controller Cache |
|
Use Scenario: Buffers uncompressed grayscale image frames (512 × 512 × 16-bit) in ultrasound and X-ray digitizers using parallel video processors. IC Role / Device Role / Timing Role: Synchronous 16-bit SRAM providing burst-access pixel storage with tRC = 10 ns to match pixel clock rates up to 100 MHz. Use Value: Eliminates FIFO bottlenecks in real-time image pipelines, supporting 30 fps acquisition without frame dropping or line skew. |
Use Scenario: Caches symbol and font bitmaps in ARINC 661-compliant cockpit display generators requiring deterministic memory access. IC Role / Device Role / Timing Role: Radiation-tolerant-adjacent SRAM (SOJ package) with low ISB2 (3 mA) to minimize heat in sealed avionics enclosures. Use Value: Reduces thermal load in conduction-cooled display units while meeting DO-254 timing assurance for safety-critical rendering paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS61LV102416-10MLI | Same 64 K × 16 organization, 10 ns access, but uses 44-pin TSOP II (not SOJ); ISB2 = 2 mA (slightly lower standby) | Requires PCB redesign due to different footprint and lead form; better suited for new designs with surface-mount assembly | Select if migrating from through-hole to surface-mount and board space is constrained |
| Cypress CY7C1021CV33-10VXI | Pin-and function-compatible predecessor; same SOJ package but higher ISB2 = 5 mA and no automotive qualification | Lacks Automotive-A temperature validation; unsuitable for under-hood deployment despite identical pinout | Select only for cost-sensitive industrial applications where extended temp range is not required |
Compared with IS61LV102416-10MLI and CY7C1021CV33-10VXI, the CY7C1021DV33-10VXIT uniquely combines SOJ package compatibility, automotive-grade qualification, and 3 mA standby - making it the sole option for drop-in replacement in thermally demanding legacy systems.
Availability
CY7C1021DV33-10VXIT is available at Aetrix Electronics and suitable for industrial PLC memory buffers, automotive ECU data logging, and legacy medical imaging frame buffers requiring stable component supply across extended product lifecycles.
Supply support for CY7C1021DV33-10VXIT 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
Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability memory and programmable solutions for industrial, automotive, and aerospace applications, with focus on interoperability and long-term supply stability.
The CY7C1021D series delivers pin-compatible, enhanced-reliability SRAMs targeting legacy system upgrades - specifically engineered to extend service life of 16-bit microprocessor-based equipment without redesign.
FAQ
Is CY7C1021DV33-10VXIT compatible with 5 V logic interfaces?
No. The device operates exclusively at 3.3 V ± 0.3 V and is not 5 V tolerant. Input voltages exceeding VCC + 0.3 V (i.e., >3.6 V) or falling below –0.3 V may damage the part. Level-shifting circuitry is required for interfacing with 5 V microcontrollers or FPGAs.
Does CY7C1021DV33-10VXIT require an external clock or refresh signal?
No. As a static RAM, it has no clock input and does not require periodic refresh. Data remains valid indefinitely as long as VCC is maintained above 2.0 V and the device is not subjected to radiation-induced soft errors - typical for terrestrial industrial use.
What is the meaning of "VXIT" in the part number?
"VXIT" denotes a 44-pin 400-mil wide molded SOJ package, Pb-free and RoHS-compliant, qualified for Industrial and Automotive-A temperature ranges (–40 °C to +85 °C), with tape-and-reel packaging per EIA-481 standard.
Can BLE and BHE be asserted simultaneously for full 16-bit writes?
Yes. Asserting both BLE and BHE LOW enables concurrent writing to I/O0–I/O7 and I/O8–I/O15, performing a full 16-bit write in a single cycle. This configuration matches standard 16-bit bus operation and is explicitly supported in the truth table of the datasheet.
CY7C1021DV33-10VXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 44-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 1Mbit
- Memory Organization:
- 64K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10ns
- Access Time:
- 10 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SOJ
CY7C1021DV33-10VXIT FAQ
1.How can I place an order for CY7C1021DV33-10VXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021DV33-10VXIT 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 CY7C1021DV33-10VXIT reliable?
The price and inventory of CY7C1021DV33-10VXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021DV33-10VXIT is usually 5 days.
3.What payment methods are accepted for CY7C1021DV33-10VXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021DV33-10VXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021DV33-10VXIT?
CY7C1021DV33-10VXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021DV33-10VXIT 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 CY7C1021DV33-10VXIT?
For technical support, including CY7C1021DV33-10VXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021DV33-10VXIT requirements.
6.How does Aetrix verify that CY7C1021DV33-10VXIT is sourced from the original manufacturer or authorized distributors?
All CY7C1021DV33-10VXIT 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 CY7C1021DV33-10VXIT meets industry standards.
7.What is the process for return or replacement of CY7C1021DV33-10VXIT?
All CY7C1021DV33-10VXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021DV33-10VXIT, 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 CY7C1021DV33-10VXIT part is unused and in its original packaging.
Return procedure for CY7C1021DV33-10VXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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