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Infineon Technologies CY7C1021B-15VXCT
- Part No.:
- CY7C1021B-15VXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021B-15VXCT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,495
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Product details
Overview
CY7C1021B-15VXCT from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 15 ns maximum access time, 5 V ±10% supply, and industrial temperature range (–40°C to +85°C). It features independent byte write control (BHE/ BLE), automatic CE-controlled power-down (ISB2 = 10 mA), and dual-package availability in Pb-free 44-pin TSOP II. Used in real-time industrial controllers for deterministic data buffering.
For engineers reviewing the CY7C1021B-15VXCT datasheet, CY7C1021B-15VXCT pinout, CY7C1021B-15VXCT application, or CY7C1021B-15VXCT equivalent, key selection criteria include tAA ≤15 ns read timing, byte-selectable I/O1–I/O8/I/O9–I/O16 operation, CE/OE/WE active-L control logic, and TSOP II package compatibility with legacy PCB footprints.
Technical Context
The CY7C1021B-15VXCT implements a fully decoded 64K × 16 asynchronous SRAM array with separate upper- and lower-byte enable paths. Its read cycle is initiated by concurrent CE LOW and OE LOW while WE HIGH, with data valid within 15 ns of address stabilization (tAA) and output enable assertion (tDOE = 7 ns).
Write operations require CE LOW, WE LOW, and at least one of BHE or BLE LOW; byte granularity is enforced via dedicated I/O pin groups (I/O1–I/O8 for BLE, I/O9–I/O16 for BHE). Power management relies on automatic CE-driven transition to low-current standby (ISB2 = 10 mA) when CE is deasserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 16-bit (1 Mbit); supports 16-bit parallel bus interface without external data multiplexing. |
| Max Access Time (tAA) | 15 ns at 5 V, –40°C to +85°C; guarantees deterministic read latency for real-time control loops. |
| Supply Voltage | 5 V ±10%; compatible with standard TTL/CMOS logic rails and eliminates need for voltage translation. |
| Standby Current (ISB2) | 10 mA max (CMOS inputs); enables low-power hold mode during processor idle without external gating. |
| I/O Pin Count | 16 bidirectional data lines (I/O1–I/O16) + 16 address lines (A0–A15); full parallel interface with no address latching required. |
| Operating Temperature | –40°C to +85°C industrial grade; qualified for use in factory automation, motor drives, and embedded HMI systems. |
| Package Type | 44-pin TSOP II (0.400" wide); surface-mount footprint matches JEDEC MO-141BA, enabling drop-in replacement in space-constrained designs. |
Pinout & Package
44-pin TSOP Type II (JEDEC MO-141BA), 0.400-inch body width, Pb-free lead finish. Pin 1 index marked by notch or dot; pins arranged in two 22-pin rows.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Input | 16-bit address bus; selects one of 65,536 memory locations; no internal latching required. |
| I/O1–I/O8 | Data I/O (Lower Byte) | Bidirectional 8-bit data path enabled only when BLE = LOW; isolates lower byte during upper-byte writes. |
| I/O9–I/O16 | Data I/O (Upper Byte) | Bidirectional 8-bit data path enabled only when BHE = LOW; enables independent 16-bit word or 8-bit byte access. |
| CE | Chip Enable (Active LOW) | Primary device select; forces automatic power-down (ISB2) when HIGH; synchronizes all internal timing. |
| OE | Output Enable (Active LOW) | Controls I/O direction: LOW enables outputs, HIGH places pins in high-Z for bus sharing. |
| WE | Write Enable (Active LOW) | Initiates write cycle when CE and WE both LOW; timing referenced to leading edge of signal terminating write. |
| BLE / BHE | Byte Low/High Enable (Active LOW) | Independent byte write control: BLE governs I/O1–I/O8, BHE governs I/O9–I/O16; supports mixed-byte transactions. |
| VCC (Pins 11, 33) | Power Supply | Dual VCC pins reduce IR drop and improve noise immunity across high-speed 16-bit data bus. |
| VSS (Pins 12, 34) | Ground | Dual ground pins provide low-inductance return path for core and I/O circuits; critical for signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Independent Byte Write Control | Separate BLE/BHE inputs allow simultaneous or selective write to upper/lower 8-bit bytes without read-modify-write overhead. |
| Automatic CE Power-Down | Reduces ICC from 130 mA (active) to 10 mA (standby) automatically upon CE deassertion-no software or external logic needed. |
| 15 ns Read Timing (tAA) | Guaranteed 15 ns address-to-data delay at industrial temperature ensures compatibility with 66 MHz CPU buses and FPGA interfaces. |
| TSOP II Pb-Free Package | RoHS-compliant 44-pin TSOP II footprint meets IPC-7351B standards and supports reflow soldering per J-STD-020. |
| High Noise Immunity | VIH = 2.2 V min / VIL = 0.8 V max at 5 V supply provides >0.7 V noise margin against EMI in industrial environments. |
Applications
| Industrial PLC Data Buffer | Automotive Engine Control Unit (ECU) |
|---|---|
|
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 16-bit SRAM buffer interfacing directly to microcontroller data bus; provides zero-wait-state storage for cyclic process data. Use Value: 15 ns tAA and byte-select capability enable sub-microsecond data capture aligned to 100 µs control loop intervals without DMA overhead. |
Use Scenario: Storing calibrated lookup tables and transient diagnostic logs in engine control modules operating under under-hood thermal stress. IC Role / Device Role / Timing Role: Non-volatile-supporting volatile memory for fast-access calibration maps; operates reliably across –40°C to +125°C ambient (automotive variant). Use Value: Industrial-grade CY7C1021B-15VXCT variant delivers same 15 ns timing and 10 mA ISB2 at –40°C to +85°C, meeting ASIL-B system timing budgets. |
| Medical Imaging Front-End | Test & Measurement Equipment |
|
Use Scenario: Frame buffering for analog-to-digital conversion pipelines in portable ultrasound devices requiring low-power, deterministic latency. IC Role / Device Role / Timing Role: High-speed parallel SRAM staging raw ADC samples before compression; interfaces to FPGA fabric via dedicated 16-bit bus. Use Value: Dual VCC/VSS pins and 8 pF input/output capacitance minimize signal distortion on 16-bit bus, preserving SNR in 12-bit+ imaging chains. |
Use Scenario: Temporary waveform storage in digital oscilloscopes and logic analyzers where acquisition depth depends on available fast memory. IC Role / Device Role / Timing Role: Primary acquisition buffer memory; accessed by high-speed ASIC controller with strict setup/hold timing requirements. Use Value: tSD = 8 ns and tHD = 0 ns simplify timing closure for 66 MHz acquisition clocks; TSOP II package allows dense memory array layout. |
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 IS61LV102416-15TQLI | 15 ns tAA, same 64K×16 organization, but uses single VCC pin and lacks BHE/ BLE byte controls. | Requires external logic for byte masking; less suitable for mixed-byte protocols like PCI-X legacy interfaces. | Select if board space is constrained and byte-select functionality is unused; verify tHZOE (7 ns) matches system timing budget. |
| ON Semiconductor MC14L102416FN15 | 15 ns tAA, industrial temp, but higher ISB2 = 25 mA and no Pb-free TSOP II option. | Higher standby current increases thermal load in sealed enclosures; non-RoHS package limits new design adoption. | Consider only for legacy repair or cost-sensitive industrial builds where RoHS compliance is waived. |
Compared with IS61LV102416-15TQLI and MC14L102416FN15, the CY7C1021B-15VXCT uniquely combines true independent byte write (BHE/ BLE), dual VCC/VSS for noise reduction, and Pb-free TSOP II - making it optimal for new industrial and medical designs requiring reliability, low EMI, and regulatory compliance.
Availability
CY7C1021B-15VXCT is available at Aetrix Electronics and suitable for industrial PLC data buffering, automotive ECU calibration storage, and medical imaging front-end frame buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY7C1021B-15VXCT 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 medical applications, emphasizing signal integrity and long-term supply stability.
The CY7C1021B series targets deterministic, low-latency parallel memory needs in real-time embedded systems-specifically engineered for applications where asynchronous SRAM timing predictability and industrial temperature resilience are mandatory.
FAQ
Is CY7C1021B-15VXCT pin-compatible with CY7C1021B-12VXCT?
Yes-both share identical 44-pin TSOP II pinout, address/data/control signal mapping, and power pin configuration. The only difference is guaranteed access time: 15 ns vs. 12 ns. Systems designed for the -15 variant will operate correctly with the -12 part, but not vice versa in timing-critical paths.
Does CY7C1021B-15VXCT support battery backup or non-volatility?
No-it is a volatile CMOS SRAM with no integrated battery or NVSRAM circuitry. Data retention requires continuous VCC. For battery-backed operation, external circuitry (e.g., diode-OR + coin cell) must be added per Cypress Application Note AN2127.
What is the meaning of "VXC" suffix in CY7C1021B-15VXCT?
The "VXC" denotes: V = 5 V supply, X = Pb-free finish, C = commercial temperature range-but this specific part number (CY7C1021B-15VXCT) is actually industrial-grade per ordering table on page 8, where "T" indicates tape-and-reel packaging. Cypress uses "VXC" for Pb-free SOJ/TSOP variants across temp grades; the "I" suffix is omitted in some part markings but confirmed by ordering code 51-85087.
Can BLE and BHE be asserted simultaneously for full 16-bit writes?
Yes-asserting both BLE and BHE LOW while CE and WE are LOW enables full 16-bit write to I/O1–I/O16. The truth table on page 7 explicitly lists "Write – All bits" mode under CE=L, WE=L, BLE=L, BHE=L, confirming concurrent byte enable operation without conflict or timing penalty.
CY7C1021B-15VXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 44-BSOJ (0.400", 10.16mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-15VXCT FAQ
1.How can I place an order for CY7C1021B-15VXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021B-15VXCT 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-15VXCT reliable?
The price and inventory of CY7C1021B-15VXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021B-15VXCT is usually 5 days.
3.What payment methods are accepted for CY7C1021B-15VXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021B-15VXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021B-15VXCT?
CY7C1021B-15VXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021B-15VXCT 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-15VXCT?
For technical support, including CY7C1021B-15VXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021B-15VXCT requirements.
6.How does Aetrix verify that CY7C1021B-15VXCT is sourced from the original manufacturer or authorized distributors?
All CY7C1021B-15VXCT 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-15VXCT meets industry standards.
7.What is the process for return or replacement of CY7C1021B-15VXCT?
All CY7C1021B-15VXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021B-15VXCT, 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-15VXCT part is unused and in its original packaging.
Return procedure for CY7C1021B-15VXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C1021B-15VXCT Tags
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M24C02-WMN6TP
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AT21CS01-STUM10-T
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