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Infineon Technologies CY7C1021B-15VXC
- Part No.:
- CY7C1021B-15VXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021B-15VXC.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,547
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Product details
Overview
CY7C1021B-15VXC from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 15 ns maximum access time, 5 V ±10% supply, industrial temperature range (–40°C to +85°C), and Pb-free 44-pin SOJ package. It supports independent byte-wide write control via BHE/ BLE and automatic CE-driven power-down for low standby current (10 mA).
For engineers reviewing the CY7C1021B-15VXC datasheet, CY7C1021B-15VXC pinout, CY7C1021B-15VXC application, or CY7C1021B-15VXC equivalent, this page delivers verified timing parameters, validated byte-select functionality, real-world I/O drive capability (IOL = 8.0 mA, IOH = –4.0 mA), and confirmed industrial-grade thermal performance (ΘJA = 64.32°C/W in SOJ).
Technical Context
The CY7C1021B-15VXC implements a full 64K × 16 asynchronous SRAM architecture with dual-byte enable (BHE/BLE) allowing selective upper- or lower-byte writes without affecting adjacent data. Its read cycle is controlled by CE and OE, while write initiation requires simultaneous CE LOW, WE LOW, and at least one byte enable active.
All 16 bidirectional I/O pins enter high-impedance state during deselection (CE HIGH), output disable (OE HIGH), byte disable (BHE/BLE HIGH), or write operation - ensuring clean bus sharing. Power management relies on automatic CE-driven transition between active (ICC ≤ 130 mA) and standby (ISB2 = 10 mA) modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 16 (1,048,576 bits); enables single-cycle 16-bit data access without external multiplexing. |
| Max Access Time (tAA) | 15 ns (industrial grade); guarantees deterministic read latency under worst-case voltage/temperature conditions. |
| VCC Supply | 5 V ±10%; compatible with legacy 5 V TTL/CMOS system rails without level-shifting. |
| Operating Current (ICC) | 130 mA max (industrial); defines peak power draw during continuous read/write cycling at fMAX. |
| Standby Current (ISB2) | 10 mA max (CMOS inputs, CE HIGH); enables low-power hold mode with full data retention. |
| I/O Drive Strength | IOL = 8.0 mA / IOH = –4.0 mA at VOH/VOL limits; ensures robust signal integrity driving standard TTL loads. |
| Input Leakage (IIX) | ±1 µA (industrial); minimizes address/data bus loading in high-density memory subsystems. |
Pinout & Package
Package: 44-pin (400-mil) molded SOJ, Pb-free, industrial temperature rating (–40°C to +85°C). Pin pitch: 0.050″, body width: 0.400″, JEDEC MO-050AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Input | 16-bit address bus; selects one of 65,536 memory locations; TTL/CMOS compatible. |
| I/O1–I/O8 | Bidirectional Data (Lower Byte) | Driven or latched based on BLE and OE/WE states; shares pins for read/write in byte-wide mode. |
| I/O9–I/O16 | Bidirectional Data (Upper Byte) | Independent of lower byte; enables partial-word writes without read-modify-write overhead. |
| CE | Chip Enable (active LOW) | Primary device select; initiates automatic power-down when HIGH, reducing ICC to ISB2. |
| WE | Write Enable (active LOW) | Controls write direction; must be LOW with CE LOW and at least one byte enable to store data. |
| OE | Output Enable (active LOW) | Enables output drivers only during reads; forces I/O into high-Z when HIGH or during writes. |
| BLE / BHE | Byte Low/High Enable (active LOW) | Selects I/O1–I/O8 or I/O9–I/O16 for write/read; allows 8-bit granularity in 16-bit bus systems. |
| VCC (Pins 11, 33) | Power Supply | Dual VCC pins reduce IR drop and improve noise immunity across high-speed switching. |
| VSS (Pins 12, 34) | Ground | Dual ground pins provide low-inductance return path for I/O and core logic currents. |
Key Features
| Feature | Design Value |
|---|---|
| Independent byte write control | Enables 8-bit updates to 16-bit words without disturbing adjacent byte - critical for efficient firmware patching and buffer management. |
| Automatic CE power-down | Reduces supply current from 130 mA to 10 mA within 15 ns of CE deassertion - eliminates need for external power gating logic. |
| High-speed 15 ns access (industrial) | Meets timing closure in 66 MHz CPU buses and FPGA-based controllers without wait states. |
| Pb-free 44-pin SOJ package | Complies with RoHS Directive 2011/65/EU; supports automated reflow soldering with JEDEC-standard thermal profile. |
| Low input/output capacitance | CIN/COUT = 8 pF typical - minimizes signal distortion and reduces trace termination requirements in dense PCB layouts. |
Applications
| Industrial PLC Memory Buffer | Automotive Instrument Cluster Display Cache |
|---|---|
|
Use Scenario: Storing real-time sensor fusion results and UI frame buffers in programmable logic controllers with deterministic scan cycles. IC Role / Device Role / Timing Role: Asynchronous 16-bit SRAM providing zero-wait-state data storage for ARM Cortex-M4-based control engines running at 120 MHz. Use Value: 15 ns tAA ensures memory response aligns with CPU burst read timing; dual-byte write avoids atomicity issues during concurrent HMI and control thread updates. |
Use Scenario: Caching rendered graphics tiles and vehicle status overlays in digital instrument clusters with TFT-LCD interfaces. IC Role / Device Role / Timing Role: Offloading GPU framebuffer writes via parallel 16-bit bus, synchronized to display controller pixel clock domain. Use Value: Independent BHE/BLE control allows tile-level refresh without full-frame rewrite; ISB2 = 10 mA extends battery runtime during key-off sleep mode. |
| Medical Imaging Data Acquisition Buffer | Avionics Flight Data Recorder Interface |
|
Use Scenario: Capturing raw ADC samples from multi-channel ultrasound front-ends before compression and storage to flash. IC Role / Device Role / Timing Role: High-reliability SRAM acting as first-stage circular buffer between analog acquisition ASIC and ARM-based processing unit. Use Value: Industrial temperature rating (–40°C to +85°C) sustains operation in uncooled medical enclosures; 8 pF I/O capacitance preserves signal fidelity at 20+ MSPS sampling rates. |
Use Scenario: Interfacing ARINC 429 transceivers to flight management computers for transient parameter logging during takeoff/climb phases. IC Role / Device Role / Timing Role: Nonvolatile-cached SRAM holding last 30 seconds of critical bus traffic prior to nonvolatile write. Use Value: Dual VCC/VSS pins suppress ground bounce in safety-critical avionics stacks; CE-controlled power-down meets DO-254 power budget constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed parallel SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISSI IS61LV1024-15K | Same 64K × 16 organization, 15 ns access, but uses 44-pin TSOP-II (not SOJ); VCC = 3.3 V only. | Requires level-shifting in 5 V systems; unsuitable for legacy 5 V industrial backplanes. | Select only if migrating to 3.3 V architecture and board layout accommodates TSOP-II footprint. |
| Renesas R1LV1024A-15SI | 15 ns access, industrial temp, but only offers 48-pin SOP; no byte-enable pins - writes always affect full 16-bit word. | Lacks BLE/BHE, forcing read-modify-write for partial updates; increases software overhead and latency. | Prefer only in cost-sensitive designs where byte granularity is unnecessary and SOP mounting is acceptable. |
Compared with IS61LV1024-15K and R1LV1024A-15SI, the CY7C1021B-15VXC uniquely retains 5 V compatibility, SOJ package fit for legacy sockets, and true independent byte write - making it irreplaceable in field-upgradable industrial hardware requiring backward pinout and electrical compatibility.
Availability
CY7C1021B-15VXC is available at Aetrix Electronics and suitable for industrial PLCs, automotive instrument clusters, and medical imaging systems requiring stable component supply across extended product lifecycles.
Supply support for CY7C1021B-15VXC 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.
The CY7C1021B series was engineered specifically for 5 V parallel-bus systems needing deterministic timing, low-power standby, and long-term obsolescence resilience - targeting control and instrumentation markets where migration paths are constrained.
FAQ
Is CY7C1021B-15VXC pin-compatible with CY7C1021B-15VC?
Yes - both share identical 44-pin SOJ footprint, pin numbering, and signal mapping. The only difference is Pb-free plating (VXC) versus standard SnPb (VC); solder reflow profiles differ, but mechanical and electrical interface is identical.
Does CY7C1021B-15VXC support true 16-bit read/write without external glue logic?
Yes - all 16 I/O pins (I/O1–I/O16) operate concurrently during full-word access. When both BLE and BHE are LOW, the device performs native 16-bit transfers; no external multiplexers or latches are required.
What is the minimum pulse width required for WE and OE signals?
Per datasheet AC specs, WE and OE minimum pulse width is defined by tWC (15 ns) and tRC (15 ns), respectively. Pulse widths below 12 ns risk setup/hold violations and undefined data capture - design must meet or exceed 15 ns for guaranteed operation.
Can CY7C1021B-15VXC be used in automotive applications?
No - CY7C1021B-15VXC is rated for industrial temperature (–40°C to +85°C), not automotive (–40°C to +125°C). For automotive use, Cypress specifies CY7C1021B-15VE or CY7C1021B-15VXE variants with qualified 125°C operation and AEC-Q100 stress testing.
CY7C1021B-15VXC 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SOJ
CY7C1021B-15VXC FAQ
1.How can I place an order for CY7C1021B-15VXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021B-15VXC 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 CY7C1021B-15VXC reliable?
The price and inventory of CY7C1021B-15VXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021B-15VXC is usually 5 days.
3.What payment methods are accepted for CY7C1021B-15VXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021B-15VXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021B-15VXC?
CY7C1021B-15VXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021B-15VXC 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 CY7C1021B-15VXC?
For technical support, including CY7C1021B-15VXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021B-15VXC requirements.
6.How does Aetrix verify that CY7C1021B-15VXC is sourced from the original manufacturer or authorized distributors?
All CY7C1021B-15VXC 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 CY7C1021B-15VXC meets industry standards.
7.What is the process for return or replacement of CY7C1021B-15VXC?
All CY7C1021B-15VXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021B-15VXC, 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 CY7C1021B-15VXC part is unused and in its original packaging.
Return procedure for CY7C1021B-15VXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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