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Infineon Technologies CY7C1021BN-12ZXC
- Part No.:
- CY7C1021BN-12ZXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-TSOP (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021BN-12ZXC.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:468
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Product details
Overview
CY7C1021BN-12ZXC from Cypress Semiconductor is a 1-Mbit (64 K × 16) high-speed CMOS static RAM with 15 ns access time, industrial temperature range (–40 °C to +85 °C), 5 V ±10% supply, and automatic CE-controlled power-down mode. It supports independent byte-wide writes via BHE/ BLE and operates in standard 44-pin TSOP II packaging for embedded memory subsystems in industrial control and automotive instrumentation.
For engineers reviewing the CY7C1021BN-12ZXC datasheet, CY7C1021BN-12ZXC pinout, CY7C1021BN-12ZXC application, or CY7C1021BN-12ZXC equivalent, key selection criteria include tAA ≤ 15 ns, ISB2 ≤ 10 mA (CMOS inputs), dual-byte enable support, and TSOP II package compatibility with legacy SRAM footprints.
Technical Context
The CY7C1021BN-12ZXC implements a full 65,536 × 16-bit asynchronous SRAM array with separate address decoding for row/column selection and integrated sense amplifiers. Its read/write timing is governed by overlapping CE, WE, OE, BHE, and BLE control signals - not clocked logic - enabling deterministic access without external synchronization.
Power management relies on automatic CE-driven transition into low-power standby (ISB2 = 10 mA max at CMOS input levels), while I/O tristating is controlled independently by OE, CE, BHE, and BLE states. All 16 bidirectional data lines (I/O1–I/O16) enter high-impedance when any of those controls are deasserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 64 K × 16-bit (1 Mbit); supports 16-bit parallel bus interface without external data multiplexing |
| Access time (tAA) | 15 ns maximum; enables direct interfacing with microcontrollers running at ≤66 MHz bus clocks |
| Supply voltage | 5 V ±10%; compatible with legacy 5 V TTL/CMOS system rails and level-shifting requirements |
| Standby current (ISB2) | 10 mA max (CMOS inputs); allows low-power hold mode during processor sleep without external gating |
| Operating temperature | –40 °C to +85 °C; qualified for industrial-grade reliability in uncontrolled ambient environments |
| Package | 44-pin TSOP II (10.16 mm × 20.95 mm); surface-mount compatible with standard reflow profiles and IPC-7351B land patterns |
| I/O drive strength | VOL = 0.4 V at IOL = 8 mA; ensures robust noise margin against 5 V TTL loads across full temperature range |
Pinout & Package
Package: 44-pin Thin Small Outline Package Type II (TSOP II), 400-mil body width, JEDEC MO-141AC compliant, lead-free (RoHS-compliant) construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address inputs | 16-bit address bus; selects one of 65,536 memory locations; no internal latching - requires stable address during CE LOW |
| I/O1–I/O8 | Data I/O (lower byte) | Bidirectional 8-bit data path enabled only when BLE = LOW and OE = LOW (read) or WE = LOW (write) |
| I/O9–I/O16 | Data I/O (upper byte) | Bidirectional 8-bit data path enabled only when BHE = LOW and OE = LOW (read) or WE = LOW (write) |
| CE | Chip enable | Active-low global select; forces device into standby (ISB2) when HIGH; required LOW for all read/write cycles |
| WE | Write enable | Active-low write strobe; initiates write when CE and corresponding byte enable (BLE/BHE) are also LOW |
| OE | Output enable | Active-low output gate; controls direction of I/O pins - HIGH forces tristate regardless of CE/WE state |
| BLE / BHE | Byte enable (low/high) | Independent active-low controls for lower (I/O1–I/O8) and upper (I/O9–I/O16) data bytes; enables partial-word writes |
| VCC (pins 11, 33) | Power supply | 5 V ±10% main supply; dual VCC pins reduce IR drop and improve noise immunity on wide buses |
| VSS (pins 12, 34) | Ground | Dual ground pins provide low-inductance return path for I/O and core logic switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE power-down | Reduces ICC to 10 mA max without external logic or software intervention when CE is deasserted |
| Independent byte write control | Enables 8-bit sub-word writes using BLE/BHE - eliminates need for external byte masking logic |
| High-impedance I/O on multiple conditions | I/O pins go Hi-Z automatically on CE HIGH, OE HIGH, BHE/BLE HIGH, or during write - prevents bus contention |
| Low input leakage (±1 µA) | Minimizes standby current draw from address/data bus drivers in battery-backed or low-power systems |
| TSOP II footprint compatibility | Direct replacement for legacy 44-pin SRAMs (e.g., HM628128, AS6C1008) in space-constrained PCB layouts |
Applications
| Industrial PLC Data Buffer | Automotive Instrument Cluster Memory |
|---|---|
Use Scenario: Stores real-time sensor logs and configuration parameters in programmable logic controllers with intermittent CPU access. IC Role / Device Role / Timing Role: Asynchronous 16-bit SRAM buffer interfaced directly to ARM Cortex-M4 bus with no wait states at 15 ns tAA. Use Value: Eliminates need for glue logic or FIFOs due to native byte-enable support and deterministic 15 ns access under variable load conditions. | Use Scenario: Holds display frame buffers and calibration tables in digital dashboards operating across –40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Nonvolatile-supporting volatile memory for fast UI updates; powered from vehicle's 5 V rail with automatic CE-based power gating during sleep modes. Use Value: Enables zero-latency rendering of speed/tachometer graphics using dual-byte writes to update 16-bit pixel words without bus arbitration overhead. |
| Medical Diagnostic Equipment Cache | Avionics Data Acquisition Buffer |
Use Scenario: Temporarily stores raw ADC samples from multi-channel ECG front-ends before DSP processing or storage. IC Role / Device Role / Timing Role: High-reliability SRAM acting as first-stage acquisition buffer; accessed via DMA controller with burst reads aligned to A0–A15 address boundary. Use Value: Guarantees 15 ns data validity window for synchronous sampling at up to 66 MHz bus rate, meeting IEC 62304 Class C timing constraints. | Use Scenario: Captures timestamped flight sensor telemetry (accelerometer, gyroscope) in DO-254-compliant airborne data recorders. IC Role / Device Role / Timing Role: Radiation-tolerant (industrial-grade) SRAM used as ring buffer for cyclic data capture; CE toggled per packet to minimize average power. Use Value: Delivers verified 10 mA standby current at +85 °C - critical for thermal-limited avionics enclosures with passive cooling only. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 64K × 16 SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C1008-15TIN | 15 ns tAA, same 44-pin TSOP II, but 3.3 V only; no 5 V operation | Requires level-shifting or separate 3.3 V rail; unsuitable for pure 5 V systems | Select only if migrating to 3.3 V architecture and redesigning power delivery |
| HM628128ALFP-10 | 10 ns tAA, 5 V, but obsolete; limited availability and no automotive qualification | Lacks AEC-Q100 compliance; not approved for new automotive designs | Acceptable for legacy repair only; not recommended for new designs requiring long-term supply |
Compared with AS6C1008-15TIN and HM628128ALFP-10, CY7C1021BN-12ZXC uniquely combines 5 V operation, industrial temperature rating, RoHS-compliant TSOP II packaging, and guaranteed 15 ns access - making it the only viable option for new 5 V industrial and automotive-A designs requiring assured long-term sourcing.
Availability
CY7C1021BN-12ZXC is available at Aetrix Electronics and suitable for industrial PLC data buffering, automotive instrument cluster memory, and medical diagnostic equipment cache requiring stable component supply across extended product lifecycles.
Supply support for CY7C1021BN-12ZXC 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-performance memory and programmable solutions for industrial, automotive, and IoT applications, with emphasis on reliability and long-term support.
The CY7C1021BN series targets cost-sensitive, high-reliability embedded systems needing fast, low-power, pin-compatible SRAM replacements - especially where legacy 5 V bus architectures remain in use.
FAQ
Is CY7C1021BN-12ZXC compatible with 3.3 V I/O interfaces?
No. CY7C1021BN-12ZXC is a 5 V-only device with VIH minimum of 2.2 V and VIL maximum of 0.8 V. Direct connection to 3.3 V logic requires level translation; it does not support mixed-voltage operation or 3.3 V tolerance on inputs or outputs.
Does this SRAM require an external clock signal?
No. CY7C1021BN-12ZXC is a fully asynchronous static RAM. All operations are controlled by edge- and level-sensitive control signals (CE, WE, OE, BHE, BLE); no clock input or timing reference is needed for read/write cycles.
What is the meaning of "-12ZXC" in the part number?
The suffix "-12ZXC" denotes: "12" = 15 ns access speed grade (Cypress internal code), "Z" = lead-free (Pb-free) finish, "X" = industrial temperature range (–40 °C to +85 °C), and "C" = 44-pin TSOP II package - per Cypress ordering code definitions in Document 001-06494 Rev. *J.
Can CY7C1021BN-12ZXC be used in place of CY7C1021DV-15ZSXI?
No. CY7C1021DV-15ZSXI is a 3.3 V, 15 ns, 1-Mbit SRAM in SOIC package with different pinout and voltage domain. The CY7C1021BN-12ZXC is 5 V, TSOP II, and not functionally or electrically interchangeable without board-level redesign.
CY7C1021BN-12ZXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 44-TSOP (0.400", 10.16mm Width)
- Packaging:
- Tray
- 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:
- 12ns
- Access Time:
- 12 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
CY7C1021BN-12ZXC FAQ
1.How can I place an order for CY7C1021BN-12ZXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021BN-12ZXC 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-12ZXC reliable?
The price and inventory of CY7C1021BN-12ZXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021BN-12ZXC is usually 5 days.
3.What payment methods are accepted for CY7C1021BN-12ZXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021BN-12ZXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021BN-12ZXC?
CY7C1021BN-12ZXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021BN-12ZXC 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-12ZXC?
For technical support, including CY7C1021BN-12ZXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021BN-12ZXC requirements.
6.How does Aetrix verify that CY7C1021BN-12ZXC is sourced from the original manufacturer or authorized distributors?
All CY7C1021BN-12ZXC 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-12ZXC meets industry standards.
7.What is the process for return or replacement of CY7C1021BN-12ZXC?
All CY7C1021BN-12ZXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021BN-12ZXC, 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-12ZXC part is unused and in its original packaging.
Return procedure for CY7C1021BN-12ZXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C1021BN-12ZXC Tags
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