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Infineon Technologies CY7C1021BNL-15ZXCT
- Part No.:
- CY7C1021BNL-15ZXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-TSOP (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021BNL-15ZXCT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:3,813
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Product details
Overview
CY7C1021BNL-15ZXCT from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 15 ns maximum access time, 5 V supply, and industrial temperature range (–40°C to +85°C). It features independent byte write control (BHE/ BLE), automatic CE-controlled power-down, and low active power (130 mA max). Used in legacy industrial controllers for nonvolatile data buffering during processor handshaking.
For engineers reviewing the CY7C1021BNL-15ZXCT datasheet, CY7C1021BNL-15ZXCT pinout, CY7C1021BNL-15ZXCT application, or CY7C1021BNL-15ZXCT equivalent, key selection criteria include tAA = 15 ns timing compliance, SOJ/TSOP-II package compatibility, byte-selectable I/O architecture, and ISB2 standby current ≤10 mA at industrial temperature.
Technical Context
This SRAM implements a synchronous, address-decoded 65,536 × 16-bit memory array with dual-byte write enable logic. Read/write operations are controlled by CE, OE, WE, BHE, and BLE with defined truth-table states - no internal clock or refresh required. All I/O pins enter high-impedance state when CE is HIGH or during write cycles.
Power management relies on automatic CE-driven power-down: ISB2 = 10 mA (CMOS inputs, f = 0) and ISB1 = 40 mA (TTL inputs, f = fMAX). Thermal resistance is ΘJA = 64.32°C/W (SOJ) and 76.89°C/W (TSOP-II), confirming suitability for convection-cooled industrial PCBs without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (64K × 16); supports 16-bit parallel bus interface without external data-width expansion. |
| Access Time (tAA) | 15 ns max at VCC = 5 V ±10%, TA = –40°C to +85°C; meets real-time deterministic read latency in PLC scan cycles. |
| Supply Voltage | 5 V ±10%; compatible with legacy 5 V TTL/CMOS system rails without level-shifting. |
| Active Current (ICC) | 130 mA max; enables thermal design with <1 W total dissipation in SOJ package under continuous access. |
| Standby Current (ISB2) | 10 mA max (CMOS inputs); reduces idle power in battery-backed or energy-constrained industrial nodes. |
| I/O Configuration | 16 bidirectional data lines (I/O1–I/O16) with independent byte controls (BLE/BHE); allows partial-word writes without read-modify-write overhead. |
| Operating Temperature | –40°C to +85°C (Industrial grade); validated for deployment in uncontrolled cabinet environments per IEC 60068-2-14. |
Pinout & Package
Package: 44-pin 400-mil-wide SOJ (Small Outline J-Lead), Pb-free, RoHS-compliant. Pin pitch: 0.050 inch; lead thickness: 0.004–0.013 inch; body width: 0.395–0.405 inch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Input | 16-bit address bus; selects one of 65,536 memory locations; no internal latching - requires stable address during CE LOW. |
| I/O1–I/O8 | Bidirectional Data (Lower Byte) | Driven by BLE control; used for 8-bit sub-word access; tri-stated when BLE HIGH or CE HIGH. |
| I/O9–I/O16 | Bidirectional Data (Upper Byte) | Driven by BHE control; enables independent upper-byte writes; avoids full 16-bit bus contention. |
| CE | Chip Enable (active LOW) | Primary chip select; initiates power-down mode when HIGH; must be stable before address setup for valid access. |
| WE | Write Enable (active LOW) | Controls write initiation; combined with CE and BLE/BHE to define write cycle boundaries per truth table. |
| OE | Output Enable (active LOW) | Enables output drivers only during reads; forces I/O into high-Z when HIGH, even if CE is LOW. |
| BLE / BHE | Byte Low/High Enable (active LOW) | Independent gating of lower/upper data bytes; enables true 8-bit writes without masking or software overhead. |
| VCC | Power Supply | 5 V ±10% main supply; two dedicated pins (11, 33) reduce IR drop and improve noise immunity on dense boards. |
| VSS | Ground | System ground reference; two dedicated pins (12, 34) provide low-inductance return path for I/O switching currents. |
Key Features
| Feature | Design Value |
|---|---|
| Independent byte write control | Separate BLE and BHE inputs allow concurrent or isolated 8-bit writes to upper/lower memory bytes - eliminates read-modify-write for partial updates. |
| Automatic CE power-down | Reduces ICC to ISB2 = 10 mA (CMOS inputs) when CE is HIGH; cuts active power by >92% during idle bus periods in industrial sequencers. |
| High-impedance I/O control | I/O pins enter high-Z on CE HIGH, OE HIGH, or during write - prevents bus contention in multi-SRAM or shared-data-bus architectures. |
| 15 ns access at industrial temp | tAA = 15 ns guaranteed over –40°C to +85°C; ensures deterministic timing margin for 66 MHz CPU interfaces with 2-cycle wait states. |
| Pb-free SOJ packaging | RoHS-compliant 44-pin 400-mil SOJ (J-lead) with matte tin finish; compatible with standard reflow profiles and legacy wave-solder processes. |
Applications
| Industrial PLC Data Buffering | Legacy Medical Device Memory Expansion |
|---|---|
|
Use Scenario: Storing transient sensor acquisition buffers and I/O status snapshots in programmable logic controllers with 5 V backplane buses. IC Role / Device Role / Timing Role: Nonvolatile shadow RAM holding real-time process variables between scan cycles; operates as synchronous parallel memory with deterministic 15 ns tAA. Use Value: Enables zero-wait-state 16-bit data transfers to microcontrollers running at ≤66 MHz while maintaining full industrial temperature reliability. |
Use Scenario: Extending onboard RAM in FDA-cleared patient monitor modules where firmware upgrade paths require field-replaceable memory. IC Role / Device Role / Timing Role: Drop-in replacement for obsolete 64K×16 SRAMs in life-support-adjacent subsystems; supports byte-selective writes for configuration parameter storage. Use Value: Eliminates need for external byte-enable logic or glue logic, reducing BOM count and qualification burden for Class II medical hardware. |
| Avionics Maintenance Terminal Cache | Railway Signaling Interlocking Logic |
|
Use Scenario: Caching diagnostic logs and flight parameter histories in portable maintenance terminals operating in wide ambient temperature swings. IC Role / Device Role / Timing Role: High-reliability buffer memory interfacing with PowerPC-based host processors; leverages ISB2 = 10 mA to extend battery runtime during offline diagnostics. Use Value: Meets DO-160 Section 22 temperature shock requirements (–40°C to +70°C operational) without derating or thermal throttling. |
Use Scenario: Holding safety-critical route tables and signal state maps in EUL-certified railway interlocking systems deployed in outdoor cabinets. IC Role / Device Role / Timing Role: Deterministic-access memory for SIL-2 logic execution engines; uses CE-controlled power-down to meet EN 50129 low-power fault-tolerant modes. Use Value: Guarantees tPD = 15 ns power-down exit latency, enabling rapid recovery from watchdog-triggered resets without memory corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 64K×16 SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV1024-15KLI | 15 ns tAA, 3.3 V supply, 44-pin TSOP-II; no byte enable - single 16-bit write only. | Requires voltage translation for 5 V systems; lacks BLE/BHE, increasing firmware complexity for partial writes. | Select only if migrating to 3.3 V architecture and redesigning bus interface logic. |
| AS6C1008-15ZIN | 15 ns tAA, 5 V supply, 32-pin SOIC; 128K×8 organization - requires external address multiplexing for 16-bit access. | Needs external 74LVC139 decoder and additional PCB area; incompatible pinout and footprint. | Choose only when board space permits SOIC layout and system can tolerate added decode latency. |
Compared with IS61LV1024-15KLI and AS6C1008-15ZIN, CY7C1021BNL-15ZXCT uniquely delivers native 16-bit parallel access, dual-byte write control, and industrial-grade 5 V operation in a drop-in SOJ/TSOP footprint - preserving legacy timing, power, and layout integrity.
Availability
CY7C1021BNL-15ZXCT is available at Aetrix Electronics and suitable for industrial PLCs, legacy medical device upgrades, and railway signaling systems requiring stable component supply across extended product lifecycles.
Supply support for CY7C1021BNL-15ZXCT 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.
CY7C1021BNL-15ZXCT belongs to Cypress's legacy parallel SRAM product line, engineered for deterministic timing, robust 5 V operation, and long-term availability in mission-critical embedded systems.
FAQ
Is CY7C1021BNL-15ZXCT pin-compatible with CY7C1021BN-15ZXC?
Yes - both use identical 44-pin TSOP-II packaging and share identical pin functions, including A0–A15, I/O1–I/O16, CE, OE, WE, BHE, BLE, VCC, and VSS. The "L" suffix denotes Pb-free construction, not pinout change. Layout reuse is fully supported.
What is the maximum clock frequency supported for burst reads?
This is a static RAM with no internal clock - it supports asynchronous operation only. Maximum effective throughput is determined by tRC = 15 ns (read cycle time), yielding up to 66.7 MHz sustained random-access rate. No burst mode or clock input exists.
Does CY7C1021BNL-15ZXCT support battery backup operation?
No - it lacks built-in battery-switching circuitry or NVSRAM functionality. However, its ISB2 = 10 mA standby current at 5 V enables external battery-backed operation using discrete diode-OR and regulator circuits, commonly implemented in industrial controllers.
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 executes a full 16-bit write to the addressed location. This is explicitly defined in the truth table (Row 1: CE=L, OE=H, WE=L, BLE=L, BHE=L → I/O1–I/O16 = Data In).
CY7C1021BNL-15ZXCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 44-TSOP (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-TSOP II
CY7C1021BNL-15ZXCT FAQ
1.How can I place an order for CY7C1021BNL-15ZXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021BNL-15ZXCT 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 CY7C1021BNL-15ZXCT reliable?
The price and inventory of CY7C1021BNL-15ZXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021BNL-15ZXCT is usually 5 days.
3.What payment methods are accepted for CY7C1021BNL-15ZXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021BNL-15ZXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021BNL-15ZXCT?
CY7C1021BNL-15ZXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021BNL-15ZXCT 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 CY7C1021BNL-15ZXCT?
For technical support, including CY7C1021BNL-15ZXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021BNL-15ZXCT requirements.
6.How does Aetrix verify that CY7C1021BNL-15ZXCT is sourced from the original manufacturer or authorized distributors?
All CY7C1021BNL-15ZXCT 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 CY7C1021BNL-15ZXCT meets industry standards.
7.What is the process for return or replacement of CY7C1021BNL-15ZXCT?
All CY7C1021BNL-15ZXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021BNL-15ZXCT, 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 CY7C1021BNL-15ZXCT part is unused and in its original packaging.
Return procedure for CY7C1021BNL-15ZXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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