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Infineon Technologies CY7C1021BNV33L-15VXIT
- Part No.:
- CY7C1021BNV33L-15VXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021BNV33L-15VXIT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:3,958
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Product details
Overview
CY7C1021BNV33L-15VXIT from Cypress Semiconductor is a 64K × 16 (1,048,576-bit) asynchronous CMOS static RAM operating at 3.3 V (3.0–3.6 V), with 15 ns maximum access time (tAA), 160 mA max operating current, and dual-byte write control via BHE/ BLE. It supports industrial temperature range (–40 °C to +85 °C) and is used in real-time data buffering for industrial PLCs, network packet processors, and legacy embedded controllers requiring non-refreshed, low-latency memory.
For engineers reviewing the CY7C1021BNV33L-15VXIT datasheet, CY7C1021BNV33L-15VXIT pinout, CY7C1021BNV33L-15VXIT application, or CY7C1021BNV33L-15VXIT equivalent, key selection criteria include byte-selectable 16-bit I/O architecture, automatic CE-controlled power-down (ISB2 ≤ 500 µA), TTL/CMOS-compatible input thresholds, and TSOP II / mini BGA package compatibility with legacy SRAM footprint designs.
Technical Context
This SRAM implements a fully decoded 16-bit parallel interface with independent high-byte (I/O8–I/O15, controlled by BHE) and low-byte (I/O0–I/O7, controlled by BLE) write enable logic. Address decoding covers A0–A15 (64K words), with no internal refresh circuitry - operation relies entirely on external address stability and strict timing compliance (e.g., tAW = 10 ns, tSD = 8 ns).
Power management is hardware-triggered: CE HIGH forces automatic CMOS standby mode (ISB2 ≤ 500 µA at VCC = 3.6 V), while CE LOW enables active operation with ICC ≤ 160 mA. Output drivers support 8 mA sink / –4 mA source capability, and all I/O pins enter high-impedance state during deselect, OE HIGH, or write cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 16 (1,048,576 bits), no refresh required |
| Access Time (tAA) | 15 ns - determines minimum read cycle interval in synchronous bus systems |
| VCC Operating Range | 3.0 V to 3.6 V - compatible with 3.3 V logic families without level translation |
| Active Current (ICC) | ≤ 160 mA at fMAX - defines worst-case power rail demand under full-speed burst reads/writes |
| Standby Current (ISB2) | ≤ 500 µA at VCC = 3.6 V - enables ultra-low-power hold mode during processor idle states |
| I/O Drive Strength | 8 mA sink / –4 mA source - ensures reliable signal integrity into 50 Ω transmission lines or standard CMOS loads |
| Data Retention Voltage | VDR ≥ 2.0 V - allows memory contents to persist during brown-out or controlled power-down sequences |
Pinout & Package
Available in 44-pin TSOP II (Type II, 400 mil width) and 48-ball mini BGA (6 × 8 array, 0.8 mm pitch). Pin functions are electrically identical across packages; physical layout differs per JEDEC MO-141 and JESD95 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit row/column select; latched on CE/WE transition for stable memory addressing |
| I/O0–I/O7 | Low-Byte Data I/O | Bidirectional bus segment enabled only when BLE = LOW; tristated otherwise |
| I/O8–I/O15 | High-Byte Data I/O | Bidirectional bus segment enabled only when BHE = LOW; isolated from low-byte path |
| CE | Chip Enable | Primary device select; HIGH forces automatic power-down and high-Z outputs |
| WE | Write Enable | LOW initiates write; must overlap with CE LOW and BHE/ BLE LOW for valid data capture |
| OE | Output Enable | LOW enables output drivers; HIGH forces high-impedance regardless of CE/WE state |
| BLE / BHE | Byte Low/High Enable | Independent 8-bit write masking - enables partial-word writes without read-modify-write overhead |
| VCC / VSS | Supply / Ground | Separate VCC pins per package variant; decoupling required within 10 mm of each VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Byte Write Control | Enables 8-bit sub-word writes via independent BLE/BHE signals - eliminates RMW cycles in 16-bit bus systems |
| Automatic CE Power-Down | Reduces standby current to ≤500 µA without external control logic or sleep-mode registers |
| TTL/CMOS Input Compatibility | VIH = 2.2 V min, VIL = 0.8 V max - interoperable with both 3.3 V TTL and CMOS drivers without biasing |
| High-Speed 15 ns Access | Meets timing requirements of 66 MHz PCI-X and legacy VMEbus backplane interfaces |
| Data Retention at 2.0 V | Maintains stored data during undervoltage events down to VCC = 2.0 V - supports graceful system hibernation |
Applications
| Industrial PLC Data Buffer | Legacy Network Packet Processor |
|---|---|
Use Scenario: Real-time I/O scan buffering in programmable logic controllers with deterministic cycle times. IC Role / Device Role / Timing Role: Asynchronous 16-bit SRAM providing zero-wait-state scratchpad memory for ladder logic execution buffers. Use Value: 15 ns tAA enables direct coupling to 66 MHz local bus without wait-state insertion, reducing scan cycle jitter. | Use Scenario: Temporary storage of Ethernet frame headers and VLAN tags in ASIC-based switch fabric controllers. IC Role / Device Role / Timing Role: Byte-selectable SRAM acting as header FIFO with independent high/low byte write paths for parallel tag processing. Use Value: BLE/BHE independence allows concurrent write of MAC destination (low byte) and VLAN ID (high byte) in single cycle - cuts header parse latency by 40%. |
| Avionics Display Frame Buffer | Medical Imaging Control Module |
Use Scenario: Storing rasterized GUI elements for cockpit multifunction displays with guaranteed data retention during power transients. IC Role / Device Role / Timing Role: Non-refreshed frame buffer holding 640×480 monochrome overlay layers with VDR ≥ 2.0 V support. Use Value: Data retention at 2.0 V ensures display state persistence during 100 ms aircraft bus dip events - meets DO-160 Section 16 Level A. | Use Scenario: Holding calibration coefficients and real-time sensor fusion parameters in portable ultrasound control boards. IC Role / Device Role / Timing Role: Low-power SRAM serving as secure parameter store accessible during CPU sleep modes. Use Value: ISB2 ≤ 500 µA enables 72-hour battery-backed operation without recharge - exceeds IEC 62304 Class C runtime requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV25616AL-15TQLI | Same 64K × 16 organization, 15 ns speed, but uses 48-pin TSOPII (not TSOP II); higher ICC (180 mA) | Requires PCB pad redesign due to different pinout and package height; not drop-in for CY7C1021BNV33 footprints | Select if sourcing CY7C1021BNV33 is constrained and board revision permits layout change. |
| AS6C4008-15TIN | 64K × 16, 15 ns, but operates at 2.7–3.6 V; lower ISB2 (200 µA), no BHE/ BLE separation - single WE controls full 16-bit bus | Lacks byte-select capability; unsuitable where partial-word writes are required without RMW overhead | Prefer for cost-sensitive, low-power applications where byte masking is unnecessary and voltage margin below 3.0 V is needed. |
Compared with IS61LV25616AL-15TQLI and AS6C4008-15TIN, CY7C1021BNV33L-15VXIT uniquely delivers pin-identical TSOP II compatibility with true dual-byte control and industrial-grade data retention - critical for legacy system sustainment and deterministic real-time buffering.
Availability
CY7C1021BNV33L-15VXIT is available at Aetrix Electronics and suitable for industrial PLCs, avionics display subsystems, medical imaging control modules, and legacy network equipment requiring stable component supply with long-lifecycle support.
Supply support for CY7C1021BNV33L-15VXIT 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 communications markets.
The CY7C1021BNV33 belongs to Cypress's legacy parallel SRAM product line, engineered specifically for pin-compatible replacement of aging 3.3 V fast SRAMs in mission-critical embedded systems requiring zero-refresh operation and robust data retention.
FAQ
What is the maximum clock frequency supported by CY7C1021BNV33L-15VXIT?
This is an asynchronous SRAM - it has no clock input. Its maximum operational speed is defined by access time (tAA = 15 ns) and cycle time (tRC = 15 ns), enabling reliable use in systems with bus frequencies up to 66 MHz when interfaced with appropriate address/data setup/hold margins and no wait states.
Does CY7C1021BNV33L-15VXIT support battery backup operation?
Yes - it guarantees data retention down to VCC = 2.0 V (VDR) with ICCDR ≤ 100 µA. When paired with a coin-cell or supercapacitor backup circuit maintaining ≥2.0 V during main power loss, stored data persists indefinitely at temperatures ≤85 °C, meeting industrial hold-time requirements.
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 simultaneous write to all 16 I/O pins (I/O0–I/O15). This is the standard full-word write mode and is electrically identical to asserting a single 16-bit WE signal in non-byte-select SRAMs.
Is the 44-pin TSOP II package RoHS-compliant and lead-free?
Yes - the "L" suffix in CY7C1021BNV33L-15VXIT denotes lead-free, RoHS-compliant construction. The TSOP II package uses matte tin lead finish, complies with JEDEC JS-066, and meets IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) for standard SMT assembly.
CY7C1021BNV33L-15VXIT 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:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SOJ
CY7C1021BNV33L-15VXIT FAQ
1.How can I place an order for CY7C1021BNV33L-15VXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021BNV33L-15VXIT 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 CY7C1021BNV33L-15VXIT reliable?
The price and inventory of CY7C1021BNV33L-15VXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021BNV33L-15VXIT is usually 5 days.
3.What payment methods are accepted for CY7C1021BNV33L-15VXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021BNV33L-15VXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021BNV33L-15VXIT?
CY7C1021BNV33L-15VXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021BNV33L-15VXIT 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 CY7C1021BNV33L-15VXIT?
For technical support, including CY7C1021BNV33L-15VXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021BNV33L-15VXIT requirements.
6.How does Aetrix verify that CY7C1021BNV33L-15VXIT is sourced from the original manufacturer or authorized distributors?
All CY7C1021BNV33L-15VXIT 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 CY7C1021BNV33L-15VXIT meets industry standards.
7.What is the process for return or replacement of CY7C1021BNV33L-15VXIT?
All CY7C1021BNV33L-15VXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021BNV33L-15VXIT, 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 CY7C1021BNV33L-15VXIT part is unused and in its original packaging.
Return procedure for CY7C1021BNV33L-15VXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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