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Infineon Technologies CY7C1021B-15VXIT
- Part No.:
- CY7C1021B-15VXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021B-15VXIT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,710
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Product details
Overview
CY7C1021B-15VXIT from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 15 ns maximum access time, 5 V ±10% supply, industrial temperature range (–40°C to +85°C), and automatic CE-controlled power-down. It supports independent byte-wide writes via BHE/BLE and operates in 44-pin TSOP II packaging - deployed in real-time industrial controllers requiring deterministic memory access.
For engineers reviewing the CY7C1021B-15VXIT datasheet, CY7C1021B-15VXIT pinout, CY7C1021B-15VXIT application, or CY7C1021B-15VXIT equivalent, key selection criteria include tAA = 15 ns read timing, ISB2 = 10 mA CMOS standby current, dual-byte enable architecture, and Pb-free TSOP II package compatibility with legacy 400-mil SOJ footprints.
Technical Context
The CY7C1021B-15VXIT implements a fully static 64K × 16 asynchronous SRAM array with separate byte write control (BHE for I/O9–I/O16, BLE for I/O1–I/O8), enabling partial-word updates without read-modify-write cycles. Its TTL/CMOS-compatible inputs support direct interfacing with microcontrollers and FPGAs.
Power management relies on automatic CE-driven power-down: when CE is HIGH, ICC drops to ISB2 = 10 mA (CMOS input condition), reducing active power to ≤770 mW at 15 ns speed. Output enable (OE) and write enable (WE) are independently controlled for precise bus timing coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 16 (1,048,576 bits); enables 16-bit data bus alignment without external multiplexing |
| Access Time (tAA) | 15 ns max (industrial temp); guarantees deterministic read latency for real-time control loops |
| Supply Voltage | 5 V ±10%; compatible with standard 5 V logic families and legacy industrial power rails |
| Standby Current (ISB2) | 10 mA max (CMOS inputs); enables low-power hold mode during processor sleep states |
| Operating Temperature | –40°C to +85°C; qualified for industrial automation, motor drives, and PLC backplanes |
| Package | 44-pin TSOP Type II (10.16 mm × 18.42 mm); surface-mount compatible with automated PCB assembly |
| Byte Write Control | BHE and BLE inputs allow independent 8-bit writes to upper/lower data bytes - eliminates bus contention in multi-master systems |
Pinout & Package
44-pin TSOP Type II (JEDEC MO-143AC), 400-mil width, Pb-free termination. Pin 1 index marked by notch or dot; pins numbered counterclockwise from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Input | 16-bit address bus; selects one of 65,536 memory locations; no internal latching |
| I/O1–I/O8 | Bidirectional Data (Lower Byte) | Driven by memory during reads when BLE = LOW; accepts data during writes under same condition |
| I/O9–I/O16 | Bidirectional Data (Upper Byte) | Driven by memory during reads when BHE = LOW; accepts data during writes under same condition |
| CE | Chip Enable (active LOW) | Primary chip select; forces automatic power-down and high-Z outputs when HIGH |
| WE | Write Enable (active LOW) | Controls write initiation; must be LOW with CE LOW and BHE/BLE LOW to store data |
| OE | Output Enable (active LOW) | Enables output drivers; tri-states I/Os when HIGH, allowing shared bus operation |
| BHE / BLE | Byte High/Low Enable (active LOW) | Selects upper or lower 8-bit byte for read/write; enables partial-word access without bus locking |
| VCC (Pins 11, 33) | Power Supply | 5 V ±10% main supply; dual pins reduce IR drop and improve noise immunity |
| VSS (Pins 12, 34) | Ground | Dual ground pins provide low-inductance return path for switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Independent byte write control | Enables concurrent 8-bit writes to upper/lower data lanes - reduces bus arbitration overhead in multi-processor systems |
| Automatic CE power-down | Reduces ICC to 10 mA (ISB2) with no external control logic - simplifies low-power state management |
| 15 ns access time at industrial temp | Meets timing closure for 66 MHz CPU buses without wait states in deterministic embedded applications |
| 44-pin TSOP II Pb-free package | RoHS-compliant footprint matches legacy 400-mil SOJ layouts - enables drop-in replacement in existing designs |
| TTL/CMOS input compatibility | VIH = 2.2 V min, VIL = 0.8 V max - interoperable with both 5 V microcontrollers and FPGA I/O banks |
Applications
| Industrial PLC Backplane Memory | Automotive Engine Control Unit Buffer |
|---|---|
|
Use Scenario: Stores real-time sensor fusion results and actuator command history in modular PLC racks with hot-swap capability. IC Role / Device Role / Timing Role: Asynchronous SRAM buffer between fieldbus interface ASIC and ARM-based controller; provides zero-wait-state access at 66 MHz burst rates. Use Value: 15 ns tAA ensures deterministic response to emergency stop interrupts; BHE/BLE allows isolated update of CAN message buffers without corrupting diagnostic logs. |
Use Scenario: Holds transient calibration tables and misfire detection counters in ECU modules operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Non-volatile shadow RAM for flash-resident firmware; retains volatile runtime data during ignition cycling. Use Value: ISB2 = 10 mA standby current extends battery life during vehicle sleep modes; industrial temp rating validates reliability over full automotive lifecycle. |
| Medical Imaging Frame Buffer | Test Equipment Pattern Generator Memory |
|
Use Scenario: Captures raw pixel streams from ultrasound transducer arrays before DSP processing in portable imaging devices. IC Role / Device Role / Timing Role: Dual-port-capable SRAM used as ping-pong frame buffer; alternates between acquisition and processing phases. Use Value: Independent BLE/BHE enables simultaneous write of new scan lines and read of prior frames - eliminating inter-frame dead time. |
Use Scenario: Stores programmable test vectors for boundary-scan and functional validation of high-speed digital boards. IC Role / Device Role / Timing Role: Static pattern memory accessed by FPGA-based sequencer; requires glitch-free address transitions and stable data hold. Use Value: tOHA = 3 ns address hold margin prevents metastability during vector clocking; 44-pin TSOP II supports dense layout in compact ATE modules. |
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 |
|---|---|---|---|
| AS6C1008-15TIN | 1-Mbit (128K × 8), 15 ns, 3.3 V supply; no byte enable pins; single VCC/VSS pair | Requires external byte merging logic for 16-bit interfaces; unsuitable for 5 V systems | Select only if migrating to 3.3 V architecture and redesigning data bus routing |
| IS61LV1024-15TQLI | 1-Mbit (64K × 16), 15 ns, 3.3 V supply; supports BHE/BLE; 44-pin TSOP II | Lower standby current (ISB = 3 µA), but incompatible with 5 V I/O; requires level-shifting | Prefer for new 3.3 V designs where ultra-low quiescent power outweighs voltage translation cost |
Compared with AS6C1008-15TIN and IS61LV1024-15TQLI, the CY7C1021B-15VXIT uniquely delivers 5 V operation, true 16-bit organization, and industrial-temp-rated byte write control - making it irreplaceable in legacy 5 V industrial and automotive platforms without voltage or bus rearchitecture.
Availability
CY7C1021B-15VXIT is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive engine control units, and medical imaging subsystems requiring stable component supply across extended product lifecycles.
Supply support for CY7C1021B-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 logic solutions for industrial, automotive, and communications infrastructure.
The CY7C1021B series targets deterministic, low-latency memory needs in mission-critical embedded systems - emphasizing robust AC timing, wide temperature operation, and pin-compatible scalability across speed grades.
FAQ
Is CY7C1021B-15VXIT compatible with 5 V TTL logic levels?
Yes. The device specifies VIH = 2.2 V minimum and VIL = 0.8 V maximum across its full industrial temperature range, ensuring reliable interfacing with standard 5 V TTL and CMOS drivers without level shifters. Output drive strength (IOH = –4.0 mA, IOL = 8.0 mA) meets TTL fan-out requirements.
Does CY7C1021B-15VXIT support true simultaneous read/write on upper and lower bytes?
No. While BHE and BLE operate independently, the device performs only one internal memory access per cycle. Concurrent read from one byte and write to the other is not supported - the array is accessed atomically per address location. True simultaneous operations require dual-port SRAM.
What is the maximum junction temperature under continuous operation?
Based on ΘJA = 76.89 °C/W (TSOP II) and maximum ambient of +85°C, with 770 mW max power dissipation, the calculated junction temperature is +147.5°C - within the absolute maximum rating of +150°C. Derating is recommended above 70°C ambient for long-term reliability.
Can NC pins (22, 23, 28) be tied to VCC or GND?
No. Pins 22, 23, and 28 are explicitly designated as No Connect in the datasheet and are not bonded to the die. They must remain unconnected - tying them to any voltage risks internal leakage paths or undefined behavior due to floating metal layers.
CY7C1021B-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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-SOJ
CY7C1021B-15VXIT FAQ
1.How can I place an order for CY7C1021B-15VXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021B-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 CY7C1021B-15VXIT reliable?
The price and inventory of CY7C1021B-15VXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021B-15VXIT is usually 5 days.
3.What payment methods are accepted for CY7C1021B-15VXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021B-15VXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021B-15VXIT?
CY7C1021B-15VXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021B-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 CY7C1021B-15VXIT?
For technical support, including CY7C1021B-15VXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021B-15VXIT requirements.
6.How does Aetrix verify that CY7C1021B-15VXIT is sourced from the original manufacturer or authorized distributors?
All CY7C1021B-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 CY7C1021B-15VXIT meets industry standards.
7.What is the process for return or replacement of CY7C1021B-15VXIT?
All CY7C1021B-15VXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021B-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 CY7C1021B-15VXIT part is unused and in its original packaging.
Return procedure for CY7C1021B-15VXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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