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Infineon Technologies CY7C1021BN-15VXCT
- Part No.:
- CY7C1021BN-15VXCT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021BN-15VXCT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:2,260
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Product details
Overview
CY7C1021BN-15VXCT 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 supports independent byte write control via BHE/ BLE pins, automatic CE-based power-down, and operates in 44-pin TSOP II package. Used in real-time industrial controllers requiring deterministic memory access and low standby current.
For engineers reviewing the CY7C1021BN-15VXCT datasheet, CY7C1021BN-15VXCT pinout, CY7C1021BN-15VXCT application, or CY7C1021BN-15VXCT equivalent, key selection criteria include tAA = 15 ns timing, ISB2 = 10 mA CMOS standby current, byte-selectable I/O1–I/O16 interface, and SOJ/TSOP II package compatibility with legacy board layouts.
Technical Context
This SRAM implements a synchronous, non-volatile-independent 64K × 16-bit array with dual-byte enable architecture: BLE controls I/O1–I/O8 (lower byte), BHE controls I/O9–I/O16 (upper byte). Address decoding uses full 16-bit A0–A15 inputs with no internal multiplexing.
Power management relies on CE-driven automatic power-down: when CE is HIGH, ICC drops to ISB2 = 10 mA (CMOS mode) or ISB1 = 40 mA (TTL mode), with no external sleep signal required. Output drivers support 30-pF load at 5 V with tHZOE = 7 ns and VOL = 0.4 V at IOL = 8 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 16-bit (1,048,576 bits); enables 16-bit data bus interfacing without external width expansion. |
| Access Time (tAA) | 15 ns max at 5 V, –40°C to +85°C; guarantees deterministic read latency for hard real-time microcontroller co-processors. |
| Supply Voltage | 5 V ±10%; compatible with legacy 5 V TTL/CMOS logic families and eliminates level-shifting in industrial backplanes. |
| Standby Current (ISB2) | 10 mA max (CMOS inputs); reduces idle power in always-on embedded systems with infrequent memory access. |
| Operating Current (ICC) | 130 mA max at fMAX = 66.7 MHz; defines thermal budget for continuous burst reads in data acquisition buffers. |
| I/O Drive Strength | VOL = 0.4 V at IOL = 8 mA; ensures noise margin >0.4 V under worst-case PCB trace loading and fanout of 10. |
| Input Leakage (IIX) | ±1 µA max (industrial temp); prevents address line floating errors in high-impedance bus-hold configurations. |
Pinout & Package
Package: 44-pin TSOP Type II (10.16 mm × 18.42 mm, 0.8 mm pitch), RoHS-compliant Pb-free variant per ordering code suffix "X".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Input | 16-bit unidirectional address bus; fully decoded to select one of 65,536 memory locations. |
| I/O1–I/O8 | Bidirectional Data (Lower Byte) | Driven by BLE; used for 8-bit sub-word writes/reads without affecting upper byte contents. |
| I/O9–I/O16 | Bidirectional Data (Upper Byte) | Driven by BHE; enables independent 8-bit updates to high-order data lanes in shared-memory architectures. |
| CE | Chip Enable (Active LOW) | Primary device select; triggers automatic power-down when HIGH, reducing ICC to ISB2. |
| WE | Write Enable (Active LOW) | Controls write initiation; must be LOW with CE LOW and BHE/ BLE LOW to latch data into memory array. |
| OE | Output Enable (Active LOW) | Enables output drivers; tri-states I/O pins when HIGH, allowing bus sharing with other peripherals. |
| BLE / BHE | Byte Low/High Enable (Active LOW) | Independent gating of lower/upper data bytes; eliminates need for external byte-masking logic. |
| VCC / VSS | Power / Ground | Dual VCC (pins 11, 33) and dual VSS (pins 12, 34) reduce IR drop and improve noise immunity in high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Independent byte write control | BLE/BHE pins allow simultaneous or separate 8-bit writes to lower/upper data lanes-reducing bus arbitration overhead in multi-master systems. |
| Automatic CE power-down | Reduces ICC from 130 mA (active) to 10 mA (standby) without external control logic-critical for battery-backed industrial HMIs. |
| 15 ns tAA with 5 V supply | Meets timing closure for 66 MHz CPU buses without wait states in PLC scan-cycle execution engines. |
| 44-pin TSOP II footprint | Backward-compatible with CY7C1021 series layouts; supports rework using standard surface-mount reflow profiles (J-STD-020). |
| Pb-free RoHS compliance | "X" suffix indicates lead-free terminations meeting JEDEC J-STD-609 Class 3 moisture sensitivity level (MSL3). |
Applications
| Industrial PLC Data Buffers | Automotive Engine Control Modules |
|---|---|
|
Use Scenario: Storing real-time sensor fusion results and actuator command queues in programmable logic controllers with 10-ms scan cycles. IC Role / Device Role / Timing Role: High-reliability, non-refreshing data buffer interfaced directly to ARM Cortex-M4 bus with 16-bit data width. Use Value: 15 ns tAA ensures zero-wait-state operation at 66 MHz bus clock, while ISB2 = 10 mA minimizes thermal rise during extended idle periods between scans. |
Use Scenario: Holding calibrated fuel injection lookup tables and diagnostic event logs in ECU units operating across –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Automotive-E grade SRAM (CY7C1021BN-15ZSXE variant) providing deterministic access under voltage transients and thermal cycling. Use Value: Dual VCC/VSS pins suppress ground bounce during CAN/LIN bus activity; BHE/ BLE isolation prevents corruption during partial-word firmware updates. |
| Medical Imaging Frame Stores | Avionics Display Processors |
|
Use Scenario: Temporary storage of 1024×768 monochrome image frames in portable ultrasound devices before compression and transmission. IC Role / Device Role / Timing Role: Burst-mode SRAM buffer synchronized to FPGA video controller with precise tHZOE = 7 ns output disable timing. Use Value: 30-pF AC load specification matches typical FPGA I/O capacitance, eliminating need for external termination resistors on high-speed pixel buses. |
Use Scenario: Caching navigation database segments and synthetic vision geometry data in certified flight display units with DO-254 compliance requirements. IC Role / Device Role / Timing Role: Radiation-tolerant (per MIL-STD-883) SRAM used in triple-modular-redundant (TMR) memory subsystems with ECC scrubbing. Use Value: Input leakage ≤±1 µA prevents address decoder drift over 20,000-hour MTBF; NC pins (22, 23, 28) simplify layout verification for safety-critical routing. |
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 |
|---|---|---|---|
| AS6C1008-15PCN | 1-Mbit (128K × 8), 15 ns, 3.3 V only; no byte-enable pins; single VCC/VSS pair. | Requires external byte-width adaptation for 16-bit buses; unsuitable for 5 V legacy systems. | Select only if migrating to 3.3 V domain and redesigning bus interface logic. |
| IS61LV102416-15TQLI | 1-Mbit (64K × 16), 15 ns, 3.3 V; supports LVTTL levels but not 5 V tolerant; ISB = 25 µA (lower than CY7C1021BN). | Cannot interface directly with 5 V microcontrollers without level shifters; superior standby efficiency but higher cost. | Prefer for new 3.3 V designs prioritizing ultra-low ISB; avoid in mixed-voltage or retrofit applications. |
Compared with AS6C1008-15PCN and IS61LV102416-15TQLI, CY7C1021BN-15VXCT uniquely supports 5 V operation, dual-byte write, and industrial-temperature reliability without level translation-making it the only drop-in replacement for legacy 5 V SRAM-based control systems.
Availability
CY7C1021BN-15VXCT is available at Aetrix Electronics and suitable for industrial automation, automotive ECU prototyping, and medical imaging equipment requiring stable component supply across extended product lifecycles.
Supply support for CY7C1021BN-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 logic solutions for industrial, automotive, and aerospace applications.
The CY7C1021BN series targets legacy-system memory upgrades and deterministic real-time data buffering where refresh-free operation and 5 V compatibility are mandatory.
FAQ
What is the maximum operating frequency supported by CY7C1021BN-15VXCT?
The device supports a maximum read/write cycle time (tRC) of 15 ns, corresponding to 66.7 MHz maximum operational frequency. This is derived directly from the datasheet's AC switching characteristics table, where tRC = tAA = 15 ns for the -15 speed grade under industrial conditions. No derating is required at 5 V and –40°C to +85°C.
Does CY7C1021BN-15VXCT require an external clock signal?
No. CY7C1021BN-15VXCT is an asynchronous static RAM and requires no clock input. All operations are controlled by edge-triggered enable signals: CE, WE, OE, BHE, and BLE. Timing is governed solely by setup/hold relationships between these control signals and address/data lines, as defined in the truth table and AC waveforms on pages 7–8 of the datasheet.
Can CY7C1021BN-15VXCT be used in automotive applications?
Yes-when ordered with suffix "ZSXE" (TSOP II, Automotive-E grade), it is qualified for –40°C to +125°C operation and meets automotive reliability standards. The CY7C1021BN-15VXCT variant itself is commercial/industrial grade (–40°C to +85°C), making it suitable for under-hood ECUs only if ambient temperature remains within that range and transient protection is externally implemented.
How does the automatic power-down feature function without external control?
Power-down activates automatically when CE is driven HIGH, regardless of OE, WE, or BHE/ BLE states. Internal circuitry disables the memory array bias and output drivers, reducing ICC from 130 mA to 10 mA (ISB2) with CMOS-level inputs. No external sleep pin or configuration register is needed-this behavior is hardwired and documented in the Functional Description section (page 1) and Electrical Characteristics table (page 3).
CY7C1021BN-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
CY7C1021BN-15VXCT FAQ
1.How can I place an order for CY7C1021BN-15VXCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021BN-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 CY7C1021BN-15VXCT reliable?
The price and inventory of CY7C1021BN-15VXCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021BN-15VXCT is usually 5 days.
3.What payment methods are accepted for CY7C1021BN-15VXCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021BN-15VXCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021BN-15VXCT?
CY7C1021BN-15VXCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021BN-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 CY7C1021BN-15VXCT?
For technical support, including CY7C1021BN-15VXCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021BN-15VXCT requirements.
6.How does Aetrix verify that CY7C1021BN-15VXCT is sourced from the original manufacturer or authorized distributors?
All CY7C1021BN-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 CY7C1021BN-15VXCT meets industry standards.
7.What is the process for return or replacement of CY7C1021BN-15VXCT?
All CY7C1021BN-15VXCT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021BN-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 CY7C1021BN-15VXCT part is unused and in its original packaging.
Return procedure for CY7C1021BN-15VXCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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