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Infineon Technologies CY7C1021B-12VC
- Part No.:
- CY7C1021B-12VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021B-12VC.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,949
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Product details
Overview
CY7C1021B-12VC from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 12 ns access time, 5 V supply, and automatic CE-controlled power-down. It supports independent upper/lower byte write via BHE/BLE, operates from 0°C to 70°C, and is packaged in 44-pin SOJ for embedded memory buffering in industrial control systems.
For engineers reviewing the CY7C1021B-12VC datasheet, CY7C1021B-12VC pinout, CY7C1021B-12VC application, or CY7C1021B-12VC equivalent, key selection criteria include byte-select timing (tDBE = 6 ns), low standby current (ISB2 = 10 mA), dual-package availability (SOJ/TSOP II), and automotive-grade variants with extended temperature support.
Technical Context
The CY7C1021B-12VC implements a full 64K × 16 asynchronous SRAM array with separate byte enable control (BHE/BLE), enabling partial-word writes without read-modify-write cycles. Its TTL/CMOS-compatible inputs drive standard 5 V logic levels, and output drivers meet VOH ≥ 2.4 V at –4 mA and VOL ≤ 0.4 V at 8 mA.
Power management is handled through dual-level automatic power-down: ISB1 (40 mA) activates when CE > VIH with TTL inputs, while ISB2 (10 mA) engages under CMOS input conditions (CE > VCC – 0.3 V). The device uses a 16-bit bidirectional I/O bus with tri-state control via OE, CE, BHE, and BLE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (64K × 16): provides 128 KB of fast, non-volatile-critical storage for boot code or real-time data buffers. |
| Access Time (tAA) | 12 ns (Commercial): enables direct interface with 80 MHz microcontrollers without wait states. |
| Supply Voltage | 5 V ±10%: compatible with legacy 5 V system rails and mixed-voltage board designs. |
| Standby Current (ISB2) | 10 mA max: reduces idle power in always-on industrial modules where thermal budget is constrained. |
| Byte Enable Setup | BHE/BLE active-Low: allows selective 8-bit writes to upper or lower byte lanes, minimizing bus contention in multi-master systems. |
| Package | 44-pin SOJ (400-mil wide): surface-mount compatible with standard reflow profiles and IPC-7351B land patterns. |
| Operating Temp | 0°C to +70°C: validated for commercial-grade instrumentation, test equipment, and office automation hardware. |
Pinout & Package
Package: 44-pin SOJ (400-mil wide), JEDEC MS-024AC compliant, lead pitch 0.050 inch, body width 0.400 inch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Input | 16-bit address bus selecting one of 65,536 memory locations; latched on CE/WE transitions. |
| I/O1–I/O8 | Bi-directional Data (Lower Byte) | 8-bit data path enabled only when BLE = LOW; tri-stated during reads/writes unless selected. |
| I/O9–I/O16 | Bi-directional Data (Upper Byte) | 8-bit data path enabled only when BHE = LOW; independent timing from lower byte (tDBE = 6 ns). |
| CE | Chip Enable | Active-Low global select: initiates read/write cycles and triggers automatic power-down when HIGH. |
| WE | Write Enable | Active-Low write strobe: combined with CE and BHE/BLE to define write window boundaries per AC specs. |
| OE | Output Enable | Active-Low output driver control: enables data output only during valid read cycles; forces high-Z otherwise. |
| BLE / BHE | Byte Low/High Enable | Independent active-Low controls for lower/upper byte lanes; enables partial-word writes without external logic. |
| VCC / VSS | Power / Ground | Dual VCC (pins 11, 33) and dual VSS (pins 12, 34) reduce IR drop and improve noise immunity in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Independent byte write control | Eliminates need for external byte masking logic; reduces PCB area and routing complexity in 16-bit bus systems. |
| Automatic CE power-down | Reduces ICC to 10 mA (ISB2) without external control signals-critical for low-power sleep modes in portable instruments. |
| 12 ns access with 5 V supply | Meets timing requirements of legacy 8051, 68K, and early ARM7-based controllers without clock stretching. |
| SOJ and TSOP II package options | Enables migration between through-hole prototyping (SOJ) and high-density SMT production (TSOP II) using same footprint family. |
| TTL/CMOS input compatibility | Accepts VIH ≥ 2.2 V and VIL ≤ 0.8 V-interoperable with both older 5 V logic families and newer mixed-signal ASIC interfaces. |
Applications
| Industrial PLC Data Buffering | Medical Imaging Frame Store |
|---|---|
Use Scenario: Storing real-time sensor acquisition buffers in programmable logic controller backplanes with deterministic latency. IC Role / Device Role / Timing Role: Asynchronous 16-bit SRAM providing zero-wait-state memory access for cyclic data logging at 10 kHz sample rates. Use Value: 12 ns tAA ensures sub-microsecond response to CPU read requests, maintaining cycle consistency across multiple I/O modules. | Use Scenario: Holding uncompressed grayscale image frames (e.g., 512 × 512 × 16-bit) during DICOM preprocessing in portable ultrasound units. IC Role / Device Role / Timing Role: Dual-port-capable buffer supporting concurrent DMA write (from ADC) and CPU read (for edge detection algorithms). Use Value: Independent BHE/BLE enables simultaneous upper-byte pixel row updates and lower-byte metadata writes, avoiding bus arbitration delays. |
| Avionics Display Controller Cache | Test Equipment Pattern Memory |
Use Scenario: Caching GUI bitmaps and font glyphs in ruggedized cockpit display units operating in extended temperature environments. IC Role / Device Role / Timing Role: Non-volatile-supporting volatile memory used for rapid UI rendering with guaranteed 0°C to 70°C timing compliance. Use Value: Dual VCC/VSS pins minimize ground bounce during high-frequency pixel burst reads, preserving signal integrity on LVDS video links. | Use Scenario: Storing digital stimulus/response vectors in automated boundary-scan testers requiring precise timing alignment. IC Role / Device Role / Timing Role: Deterministic-access memory referenced by FPGA-based pattern sequencers with fixed-cycle execution. Use Value: tHZOE = 6 ns and tLZCE = 3 ns ensure clean output disable edges, preventing metastability in synchronized capture clocks. |
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 |
|---|---|---|---|
| IS61LV102416-12TQLI | 12 ns access, 3.3 V supply, 48-pin TSOPII; no BHE/BLE-uses single WE for full-word writes. | Requires level-shifting for 5 V systems; lacks byte-select capability-needs external gating for partial writes. | Select when migrating to 3.3 V platforms and full-word writes suffice; avoid if byte-granular control is required. |
| AS6C1008-12ZIN | 12 ns access, 5 V supply, 44-pin SOJ; no automatic power-down-standby current 30 mA (vs. 10 mA). | Higher quiescent power limits use in thermally constrained enclosures; identical pinout but no CE-driven ISB2 mode. | Select for cost-sensitive 5 V designs where power-down is managed externally; verify thermal margin with ΘJA = 64.32°C/W. |
Compared with IS61LV102416-12TQLI and AS6C1008-12ZIN, the CY7C1021B-12VC uniquely delivers 5 V compatibility, true byte-select functionality, and lowest CMOS standby current-making it optimal for legacy industrial systems requiring minimal redesign.
Availability
CY7C1021B-12VC is available at Aetrix Electronics and suitable for industrial PLC data buffering, medical imaging frame store, and avionics display controller cache requiring stable component supply across long-lifecycle programs.
Supply support for CY7C1021B-12VC 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 U.S.-based semiconductor company specializing in memory, PSoC, and USB solutions for industrial and automotive markets.
The CY7C1021B belongs to Cypress's parallel SRAM product line, designed specifically for high-reliability, low-latency memory interfacing in 5 V embedded control and instrumentation systems.
FAQ
What is the maximum clock frequency supported by CY7C1021B-12VC?
The CY7C1021B-12VC is an asynchronous SRAM and does not use a clock signal. Its maximum operational speed is defined by access time (tAA = 12 ns) and cycle time (tRC = 12 ns), supporting effective interface rates up to ~83 MHz in burst-read configurations with proper address setup/hold timing.
Does CY7C1021B-12VC support 3.3 V operation?
No. The CY7C1021B-12VC is specified only for 5 V ±10% operation (4.5 V to 5.5 V). It is not rated for 3.3 V supply and may fail to meet timing or DC specifications outside its defined VCC range.
How does automatic power-down work without external control signals?
When CE is driven HIGH, internal circuitry detects the inactive state and gates VCC current paths, reducing ICC to ISB2 = 10 mA. This occurs automatically-no OE, WE, or BHE/BLE state changes are required beyond CE deassertion.
Can CY7C1021B-12VC be used in place of CY7C1021D-12VC?
No. The CY7C1021D-12VC is a different generation with revised timing parameters, enhanced ESD protection, and updated thermal resistance values. Pinout and function are similar, but tHZOE, tPD, and ISB2 differ-direct substitution requires validation against system timing margins.
CY7C1021B-12VC 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:
- 12ns
- Access Time:
- 12 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-12VC FAQ
1.How can I place an order for CY7C1021B-12VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021B-12VC 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-12VC reliable?
The price and inventory of CY7C1021B-12VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021B-12VC is usually 5 days.
3.What payment methods are accepted for CY7C1021B-12VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021B-12VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021B-12VC?
CY7C1021B-12VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021B-12VC 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-12VC?
For technical support, including CY7C1021B-12VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021B-12VC requirements.
6.How does Aetrix verify that CY7C1021B-12VC is sourced from the original manufacturer or authorized distributors?
All CY7C1021B-12VC 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-12VC meets industry standards.
7.What is the process for return or replacement of CY7C1021B-12VC?
All CY7C1021B-12VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021B-12VC, 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-12VC part is unused and in its original packaging.
Return procedure for CY7C1021B-12VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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