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Infineon Technologies CY7C1021CV33-15VC
- Part No.:
- CY7C1021CV33-15VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021CV33-15VC.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,357
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Product details
Overview
CY7C1021CV33-15VC from Cypress Semiconductor is a 64K × 16-bit (1,048,576-bit) asynchronous CMOS static RAM with 15 ns maximum access time, 3.3 V supply, and independent byte enable control (BHE/BLE) for high-speed memory interfacing in embedded controllers and data acquisition systems.
For engineers reviewing the CY7C1021CV33-15VC datasheet, CY7C1021CV33-15VC pinout, CY7C1021CV33-15VC application, or CY7C1021CV33-15VC equivalent, key selection factors include tAA = 15 ns access timing, automatic CE-controlled power-down (ISB2 = 5 mA), dual 8-bit I/O bus segmentation, and TSOP II / SOJ / FBGA package compatibility across speed grades.
Technical Context
The CY7C1021CV33-15VC implements a fully decoded 16-bit parallel SRAM architecture with separate address (A0–A15), control (CE, OE, WE, BHE, BLE), and bidirectional data (I/O1–I/O16) interfaces. It operates exclusively in asynchronous mode with no clock input required.
Its byte-select logic enables partial-word writes without read-modify-write cycles: asserting BLE alone writes I/O1–I/O8; asserting BHE alone writes I/O9–I/O16; both active enables full 16-bit write. Output high-impedance is guaranteed during deselection (CE HIGH), output disable (OE HIGH), or write (WE LOW).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 16-bit (1 Mbit total); supports 16-bit microprocessor data bus directly without glue logic |
| Access Time (tAA) | 15 ns max; determines minimum CPU wait-state requirement for zero-wait-state interface at ≤66 MHz bus clock |
| Supply Voltage | 3.3 V ±10%; compatible with modern low-voltage logic families and eliminates level-shifting in 3.3 V systems |
| Standby Current (ISB2) | 5 mA max at VCC = 3.6 V; enables ultra-low-power retention mode when CE is deasserted |
| Byte Enable Logic | BHE/BLE inputs control upper/lower 8-bit lanes independently; allows efficient 8-bit peripheral access on 16-bit bus |
| Output Drive Strength | VOH ≥ 2.4 V @ –4 mA, VOL ≤ 0.4 V @ 8 mA; ensures TTL-compatible signal integrity into standard loads |
| Input/Output Capacitance | CIN/COUT = 8 pF max; minimizes signal distortion and timing skew on high-speed parallel buses |
Pinout & Package
Available in 44-pin TSOP II (400-mil width) and 48-ball FBGA packages. Pin functions are identical across packages except for ball/pad mapping; all share common signal assignment and electrical behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus; selects one of 65,536 memory locations; latched internally on CE/WE transitions |
| I/O1–I/O8 | Lower-Byte Bidirectional Data | Active only when BLE = LOW; isolated from bus during reads/writes to upper byte or when BLE = HIGH |
| I/O9–I/O16 | Upper-Byte Bidirectional Data | Active only when BHE = LOW; enables independent access to high-order byte without disturbing low-order byte |
| CE | Chip Enable | Primary device select; forces automatic power-down (ISB2 = 5 mA) when HIGH; disables outputs and internal array |
| OE | Output Enable | Controls output drivers only; must be LOW with CE LOW for valid read data; does not affect power state |
| WE | Write Enable | Active-LOW write strobe; initiates write cycle when CE and WE both LOW; controls data latch timing |
| BLE | Byte Low Enable | Selects lower 8-bit I/O lane; enables partial-word write/read without affecting upper byte contents |
| BHE | Byte High Enable | Selects upper 8-bit I/O lane; provides true 8/16-bit bus flexibility for mixed-width peripherals |
Key Features
| Feature | Design Value |
|---|---|
| Independent Byte Enables (BHE/BLE) | Enables true 8-bit or 16-bit access on same bus-eliminates need for external byte masking logic in mixed-width systems |
| Automatic CE-Controlled Power-Down | Reduces standby current to 5 mA without external control signals; simplifies power management in battery-backed or portable designs |
| 15 ns Access Time with 3.3 V Supply | Supports direct interface to 66 MHz microcontrollers without wait states; maintains performance while reducing voltage-related noise |
| High-Z Output Control on All Disable Conditions | Guarantees bus isolation during CE HIGH, OE HIGH, BHE/BLE HIGH, or WE LOW-prevents bus contention in multi-device systems |
| Industrial Temperature Range Support | Rated for –40°C to +85°C operation; validated for use in automotive body control modules and industrial PLC backplanes |
Applications
| Industrial PLC Backplane Memory | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Storing real-time sensor calibration tables and actuator command buffers in programmable logic controller racks with 16-bit local bus architecture. IC Role / Device Role / Timing Role: Asynchronous parallel SRAM providing zero-wait-state data storage for deterministic scan-cycle execution. Use Value: 15 ns tAA ensures sub-100 ns memory access within 100 µs PLC scan cycles; byte enables reduce bus arbitration overhead for distributed I/O updates. |
Use Scenario: Holding dynamic configuration data and fault logs in automotive BCMs where ECU space and thermal budget constrain component count. IC Role / Device Role / Timing Role: Nonvolatile-retentive SRAM used with backup battery; retains critical diagnostics during ignition-off periods. Use Value: 2.0 V data retention capability allows operation down to brown-out thresholds; ISB2 = 5 mA minimizes battery drain over multi-year vehicle service life. |
| Medical Imaging Data Buffer | Legacy Industrial HMI Controller |
|
Use Scenario: Temporary frame buffering between analog-to-digital converters and FPGA-based image processors in portable ultrasound devices. IC Role / Device Role / Timing Role: Dual-port-capable SRAM accessed alternately by ADC DMA engine and display rendering pipeline. Use Value: Independent BHE/BLE allows simultaneous 8-bit pixel stream ingestion and 8-bit grayscale LUT lookup-doubling effective throughput without doubling memory density. |
Use Scenario: Replacing obsolete 5 V SRAMs in aging human-machine interface controllers running legacy DOS-based firmware on 80286/80386 platforms. IC Role / Device Role / Timing Role: Drop-in replacement for CY7C1021BV33 with identical pinout and timing; requires only VCC regulator change to 3.3 V. Use Value: Pin- and function-compatibility reduces redesign risk; 360 mW max active power cuts thermal load by >40% vs. older 5 V parts-enabling fanless enclosure reuse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV102416-15T | 15 ns tAA, same 64K×16 organization, but uses different pinout (48-pin TSOP) and lacks BHE/BLE byte enables | Requires PCB layout change and external byte masking logic for partial-word access | Choose only if board redesign is acceptable and byte-level granularity is unnecessary |
| AS6C1008-15PCN | 15 ns tAA, 128K×8 organization (not 64K×16); single-byte interface only; no upper/lower byte control | Needs two devices and bus multiplexing for 16-bit data path; increases BOM cost and board area | Select only when strict 16-bit bus compatibility is not required and cost-per-bit is primary driver |
Compared with IS61LV102416-15T and AS6C1008-15PCN, the CY7C1021CV33-15VC uniquely delivers native 16-bit bus support with hardware byte masking-reducing system-level complexity, PCB layers, and firmware overhead in real-time embedded memory subsystems.
Availability
CY7C1021CV33-15VC is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and medical imaging data buffers requiring stable component supply and long-term lifecycle assurance.
Supply support for CY7C1021CV33-15VC 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) is a fabless semiconductor company specializing in memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer markets.
The CY7C1021CV33 series was designed specifically for high-reliability, low-power parallel memory interfacing in resource-constrained embedded systems-emphasizing timing predictability, voltage scalability, and pin-compatible migration across speed grades.
FAQ
Is CY7C1021CV33-15VC compatible with 5 V logic interfaces?
No. The CY7C1021CV33-15VC operates strictly at 3.3 V ±10% and has TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max). Direct connection to 5 V logic requires level translation; it is not 5 V tolerant. Its I/O pins are rated for –0.5 V to VCC + 0.5 V only.
Does this SRAM require an external clock or refresh circuitry?
No. The CY7C1021CV33-15VC is a fully static RAM with no clock input and no refresh requirement. Data retention is maintained indefinitely as long as VCC ≥ 2.0 V and ambient temperature remains within specification (–40°C to +85°C).
What happens to outputs when CE is HIGH and OE is LOW?
Outputs go to high-impedance state regardless of OE status when CE is HIGH. This is explicitly defined in the truth table and switching characteristics: CE HIGH forces automatic power-down and disables all I/O drivers-even if OE is asserted LOW-ensuring safe bus isolation.
Can BHE and BLE be asserted simultaneously for full 16-bit access?
Yes. When both BHE and BLE are LOW, the full 16-bit data path (I/O1–I/O16) is enabled for read or write operations. This mode matches standard 16-bit microprocessor bus behavior and is electrically identical to asserting either byte enable alone-but with double the data bandwidth per cycle.
CY7C1021CV33-15VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 44-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 15ns
- Access Time:
- 15 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SOJ
CY7C1021CV33-15VC FAQ
1.How can I place an order for CY7C1021CV33-15VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021CV33-15VC 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 CY7C1021CV33-15VC reliable?
The price and inventory of CY7C1021CV33-15VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021CV33-15VC is usually 5 days.
3.What payment methods are accepted for CY7C1021CV33-15VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021CV33-15VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021CV33-15VC?
CY7C1021CV33-15VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021CV33-15VC 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 CY7C1021CV33-15VC?
For technical support, including CY7C1021CV33-15VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021CV33-15VC requirements.
6.How does Aetrix verify that CY7C1021CV33-15VC is sourced from the original manufacturer or authorized distributors?
All CY7C1021CV33-15VC 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 CY7C1021CV33-15VC meets industry standards.
7.What is the process for return or replacement of CY7C1021CV33-15VC?
All CY7C1021CV33-15VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021CV33-15VC, 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 CY7C1021CV33-15VC part is unused and in its original packaging.
Return procedure for CY7C1021CV33-15VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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