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Infineon Technologies CY7C1021BN-15VXI
- Part No.:
- CY7C1021BN-15VXI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021BN-15VXI.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,818
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Product details
Overview
CY7C1021BN-15VXI from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 15 ns maximum access time, industrial temperature range (–40°C to +85°C), 5 V ±10% supply, and automatic CE-controlled power-down. It supports independent byte-wide write enable via BHE/ BLE and is packaged in Pb-free 44-pin SOJ for embedded control and data buffering applications.
For engineers reviewing the CY7C1021BN-15VXI datasheet, CY7C1021BN-15VXI pinout, CY7C1021BN-15VXI application, or CY7C1021BN-15VXI equivalent, key selection criteria include tAA = 15 ns read timing, ISB2 standby current ≤10 mA (CMOS inputs), dual-byte I/O control, and compatibility with legacy 44-pin SOJ footprint designs requiring industrial-grade SRAM.
Technical Context
This SRAM implements a full 64K × 16 asynchronous architecture with separate address decoding (A0–A15), bidirectional I/O1–I/O16, and three-level chip select logic (CE, OE, WE). Byte-level write control is achieved through dedicated active-low BHE (I/O9–I/O16) and BLE (I/O1–I/O8) inputs, enabling partial-word writes without external logic.
Power management relies on automatic CE-driven power-down: when CE is HIGH, ICC drops to ≤10 mA (ISB2) under CMOS input conditions, while output drivers enter high-impedance state regardless of OE/BHE/ BLE status. Timing is specified at 5 V, with tHZOE/tHZCE = 7 ns and tLZWE = 3 ns for fast bus release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (64K words × 16 bits); supports 128 KB data storage with parallel x16 interface |
| Access Time (tAA) | 15 ns max at 5 V; defines minimum clock-to-data delay in read cycles for synchronous bus interfacing |
| Supply Voltage | 5 V ±10%; compatible with standard TTL/CMOS logic families without level translation |
| Operating Temperature | –40°C to +85°C (Industrial grade); validated for use in programmable logic controllers and motor drives |
| Standby Current (ISB2) | ≤10 mA at VCC max, CE > VCC – 0.3 V; enables low-power hold mode during processor sleep states |
| I/O Drive Strength | VOL = 0.4 V @ 8 mA, VOH = 2.4 V @ –4 mA; meets TTL output voltage thresholds for direct microcontroller connection |
| Package | 44-pin SOJ (400-mil width); Pb-free, RoHS-compliant, pin-compatible with legacy CY7C1021 series |
Pinout & Package
44-pin SOJ (400-mil wide), Pb-free, RoHS-compliant package with gull-wing leads. Thermal resistance ΘJA = 64.32°C/W (SOJ), suitable for convection-cooled industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Input | 16-bit address bus; selects one of 65,536 memory locations; no internal latching |
| I/O1–I/O8 | Input/Output | Lower byte data path; driven during read when BLE = LOW, sampled during write when BLE = LOW |
| I/O9–I/O16 | Input/Output | Upper byte data path; driven during read when BHE = LOW, sampled during write when BHE = LOW |
| CE | Input/Control | Active-low chip enable; asserts device selection and disables outputs/high-Z when HIGH |
| WE | Input/Control | Active-low write enable; initiates write cycle when CE and WE both LOW; controls direction of I/O pins |
| OE | Input/Control | Active-low output enable; enables output drivers only when CE = LOW and OE = LOW; tri-states I/O when HIGH |
| BLE / BHE | Input/Control | Active-low byte enables; BLE controls I/O1–I/O8, BHE controls I/O9–I/O16; allow partial-word writes |
| VCC | Power Supply | +5 V ±10% main supply; two pins (11, 33) for reduced IR drop and improved noise immunity |
| VSS | Ground | System ground reference; two pins (12, 34) for low-inductance return path |
| NC | No Connect | Pins 22, 23, 28 are unconnected; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Independent byte write control | Separate BHE and BLE inputs enable selective upper- or lower-byte writes without external gating logic |
| Automatic CE power-down | Reduces ICC to ≤10 mA (ISB2) when CE is deasserted, eliminating need for external power-gating circuitry |
| High-impedance I/O control | I/O pins enter high-Z state on CE HIGH, OE HIGH, BHE/ BLE HIGH, or during write - prevents bus contention |
| Industrial temperature support | Validated operation from –40°C to +85°C ensures reliability in factory automation and transportation electronics |
| Pb-free SOJ packaging | RoHS-compliant 44-pin SOJ (51-85082) maintains mechanical and thermal compatibility with legacy assemblies |
Applications
| Industrial PLC Data Buffering | Automotive Engine Control Unit (ECU) Scratchpad |
|---|---|
|
Use Scenario: Storing real-time sensor calibration tables and intermediate computation results in programmable logic controllers with limited board space. IC Role / Device Role / Timing Role: Asynchronous x16 SRAM providing zero-wait-state data access for ARM Cortex-M4-based control firmware executing at 100 MHz. Use Value: 15 ns tAA and dual-byte write capability reduce bus arbitration overhead, enabling deterministic 100 µs loop execution. |
Use Scenario: Holding transient diagnostic codes and CAN message buffers in engine control modules operating under under-hood thermal stress. IC Role / Device Role / Timing Role: Industrial-grade SRAM serving as non-volatile scratchpad memory interfaced directly to Infineon AURIX TC3xx microcontroller's external bus interface. Use Value: –40°C to +85°C rating and ≤10 mA ISB2 current ensure reliable boot-up and fault logging even after thermal cycling. |
| Medical Imaging Frame Buffer | Avionics Display Controller Memory |
|
Use Scenario: Temporary storage of digitized X-ray frame segments prior to JPEG compression in portable ultrasound units. IC Role / Device Role / Timing Role: Parallel-access SRAM acting as line buffer between ADC interface and FPGA-based image processing pipeline. Use Value: 44-pin SOJ footprint allows compact placement near FPGA BGA, minimizing trace length and signal integrity loss at 50 MHz burst reads. |
Use Scenario: Supporting rasterized graphics rendering in certified cockpit display systems requiring long-term component availability. IC Role / Device Role / Timing Role: External memory resource for Renesas RH850/F1L display controller managing dual 1024×768 LCD panels. Use Value: Pb-free SOJ packaging and Cypress's 15-year longevity commitment meet DO-254 hardware lifecycle requirements. |
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 44-pin TSOP-II instead of SOJ; VCC = 3.3 V only | Requires level-shifting for 5 V systems; better suited for new 3.3 V designs with space-constrained layouts | Select if migrating to 3.3 V logic and prioritizing TSOP footprint density over SOJ mechanical robustness |
| Cypress CY7C1021DV33-15ZC | Same pinout and function but 3.3 V supply (VCC = 3.3 V ±0.3 V); tAA = 15 ns; includes LVCMOS I/O | Not electrically compatible with 5 V buses; requires redesign of power delivery and I/O termination | Choose only for greenfield 3.3 V systems where lower active power (ICC ≤ 70 mA) justifies full redesign |
Compared with IS61LV102416-15TQLI and CY7C1021DV33-15ZC, CY7C1021BN-15VXI uniquely retains 5 V compatibility, SOJ mechanical reliability, and industrial temperature support without requiring voltage translation or layout rework - critical for cost-sensitive industrial retrofits.
Availability
CY7C1021BN-15VXI is available at Aetrix Electronics and suitable for industrial PLC data buffering, automotive ECU scratchpad, medical imaging frame buffering, and avionics display controller memory requiring stable component supply across extended product lifecycles.
Supply support for CY7C1021BN-15VXI 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 mixed-signal ICs for industrial, automotive, and aerospace applications, with headquarters in San Jose, CA.
CY7C1021BN belongs to Cypress's legacy parallel SRAM product line, engineered for deterministic, low-latency data storage in resource-constrained real-time control systems where asynchronous access and industrial temperature tolerance are mandatory.
FAQ
What is the maximum operating current for CY7C1021BN-15VXI at 5 V?
The maximum operating current (ICC) is 130 mA under commercial/industrial conditions at VCC = 5.5 V, f = fMAX = 1/tRC, and IOUT = 0 mA. This value is measured during active read/write cycles and reflects worst-case dynamic power consumption for thermal design margining.
Can CY7C1021BN-15VXI be used with a 3.3 V microcontroller interface?
No - CY7C1021BN-15VXI requires 5 V ±10% (4.5 V to 5.5 V) supply and has TTL-compatible I/O thresholds (VIH = 2.2 V min, VIL = 0.8 V max). Direct connection to 3.3 V logic risks undriven inputs and violates VOH/VOL specs; level shifters are mandatory.
Does CY7C1021BN-15VXI support battery backup operation?
No - it lacks built-in battery-switching circuitry or low-VCC retention mode. While ISB2 current drops to ≤10 mA at VCC = 5 V, the device ceases memory retention below VCC(min) = 4.5 V and does not specify data retention at reduced voltage or with external backup.
Is the 44-pin SOJ package of CY7C1021BN-15VXI compatible with automated optical inspection (AOI)?
Yes - the 44-pin SOJ (51-85082) has standardized gull-wing lead geometry, 0.050-inch pitch, and defined coplanarity (≤0.004 inch), meeting IPC-A-610 Class 2 requirements for AOI detectability of solder joint defects in high-volume manufacturing.
CY7C1021BN-15VXI 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SOJ
CY7C1021BN-15VXI FAQ
1.How can I place an order for CY7C1021BN-15VXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021BN-15VXI 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 CY7C1021BN-15VXI reliable?
The price and inventory of CY7C1021BN-15VXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021BN-15VXI is usually 5 days.
3.What payment methods are accepted for CY7C1021BN-15VXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021BN-15VXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021BN-15VXI?
CY7C1021BN-15VXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021BN-15VXI 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 CY7C1021BN-15VXI?
For technical support, including CY7C1021BN-15VXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021BN-15VXI requirements.
6.How does Aetrix verify that CY7C1021BN-15VXI is sourced from the original manufacturer or authorized distributors?
All CY7C1021BN-15VXI 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 CY7C1021BN-15VXI meets industry standards.
7.What is the process for return or replacement of CY7C1021BN-15VXI?
All CY7C1021BN-15VXI units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021BN-15VXI, 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 CY7C1021BN-15VXI part is unused and in its original packaging.
Return procedure for CY7C1021BN-15VXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C1021BN-15VXI Tags
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