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Infineon Technologies CY7C1021BN-15VXIT
- Part No.:
- CY7C1021BN-15VXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021BN-15VXIT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,298
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Product details
Overview
CY7C1021BN-15VXIT 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 real-time data buffering for industrial PLCs and legacy microcontroller systems requiring non-volatile-compatible SRAM with fast parallel interface.
For engineers reviewing the CY7C1021BN-15VXIT datasheet, CY7C1021BN-15VXIT pinout, CY7C1021BN-15VXIT application, or CY7C1021BN-15VXIT equivalent, this page delivers verified timing parameters, byte-select operation logic, SOJ package pin mapping, and direct alternatives for memory upgrade paths in embedded control and instrumentation designs.
Technical Context
The CY7C1021BN-15VXIT implements a full 64K × 16 asynchronous SRAM array with dual-byte enable architecture: BLE controls I/O1–I/O8 (lower byte), BHE controls I/O9–I/O16 (upper byte), enabling partial writes without read-modify-write cycles. Its CE-driven automatic power-down reduces standby current to 10 mA (standard) or 0.5 mA (L-version).
Timing is defined by tAA = 15 ns (address-to-data valid), tRC = 15 ns (read cycle), and tWC = 15 ns (write cycle), all guaranteed over –40°C to +85°C at VCC = 5 V ±10%. Input thresholds meet TTL-compatible VIH ≥ 2.2 V and VIL ≤ 0.8 V; output drive supports IOH = –4 mA / IOL = 8 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 16 (1,048,576 bits), parallel x16 data bus |
| Access Time (tAA) | 15 ns max - guarantees deterministic read latency for 66 MHz bus interfaces |
| Supply Voltage | 5 V ±10% - compatible with legacy 5 V logic families and mixed-voltage backplanes |
| Operating Temperature | –40°C to +85°C - qualified for industrial control environments without derating |
| Active Current (ICC) | 130 mA max - enables thermal design within 44-pin SOJ ΘJA = 64.32°C/W limit |
| Standby Current (ISB2) | 10 mA (standard) or 0.5 mA (L-version) - supports low-power sleep modes in battery-backed systems |
| Byte Write Control | BLE/BHE inputs enable independent lower/upper byte writes - eliminates bus contention in 8-bit peripheral interfacing |
Pinout & Package
Package: 44-pin 400-mil-wide molded SOJ (Small Outline J-lead), RoHS-compliant (Pb-free), body width 0.405 inch, lead pitch 0.050 inch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus; selects one of 65,536 memory locations |
| I/O1–I/O8 | Lower Byte Data I/O | Bidirectional bus for D0–D7; enabled only when BLE = LOW |
| I/O9–I/O16 | Upper Byte Data I/O | Bidirectional bus for D8–D15; enabled only when BHE = LOW |
| CE | Chip Enable | Active-LOW chip select; initiates automatic power-down when HIGH |
| WE | Write Enable | Active-LOW write strobe; combined with CE and BLE/BHE to gate write cycles |
| OE | Output Enable | Active-LOW output control; places I/O pins in high-Z when HIGH |
| BLE | Byte Low Enable | Active-LOW control for I/O1–I/O8; enables lower-byte read/write |
| BHE | Byte High Enable | Active-LOW control for I/O9–I/O16; enables upper-byte read/write |
| VCC | Power Supply | +5 V ±10% main supply; two pins (11, 33) for reduced IR drop |
| VSS | Ground | System ground reference; two pins (12, 34) for noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Dual-byte write enable (BLE/BHE) | Enables independent 8-bit writes to upper/lower data bytes without full 16-bit bus transaction |
| Automatic CE power-down | Reduces ICC to ISB2 (10 mA or 0.5 mA) when CE = HIGH - no external logic required |
| TTL-compatible input thresholds | VIH ≥ 2.2 V and VIL ≤ 0.8 V - ensures interoperability with 5 V microcontrollers and FPGAs |
| High-Z outputs on deselect | I/O pins enter high-impedance state when CE = HIGH, OE = HIGH, or during write - prevents bus contention |
| Industrial temperature qualification | Specified performance across –40°C to +85°C - validated for use in motor drives and factory automation |
Applications
| Industrial PLC Data Buffering | Legacy Microcontroller Memory Expansion |
|---|---|
|
Use Scenario: Real-time I/O scan buffering in programmable logic controllers where deterministic 15 ns read latency ensures cycle-time compliance. IC Role / Device Role / Timing Role: Asynchronous parallel SRAM providing non-blocking 16-bit data storage between CPU and fieldbus interface ASICs. Use Value: Dual-byte write capability allows isolated update of status registers without disturbing control word contents in adjacent memory locations. |
Use Scenario: External memory expansion for 8051- or Z80-based embedded controllers operating at 12–20 MHz clock rates. IC Role / Device Role / Timing Role: Drop-in x16 SRAM replacing older 27C512 EPROMs in socketed memory subsystems with 5 V bus compatibility. Use Value: 15 ns tAA meets setup/hold timing margins for 66 MHz bus clocks while maintaining 5 V logic level integrity. |
| Test Equipment Data Acquisition | Medical Diagnostic Imaging Buffer |
|
Use Scenario: High-speed waveform capture buffer in digital oscilloscopes and signal analyzers requiring burst-mode memory reads. IC Role / Device Role / Timing Role: Parallel SRAM acting as first-stage FIFO between ADC front-end and DSP processor, synchronized via CE/OE handshaking. Use Value: Automatic power-down during idle acquisition phases cuts system standby power by >90% versus standard SRAMs. |
Use Scenario: Frame buffer for ultrasound or X-ray image preprocessing modules where radiation-tolerant packaging is not required but reliability is critical. IC Role / Device Role / Timing Role: Non-volatile-compatible SRAM storing intermediate pixel data during multi-pass image reconstruction algorithms. Use Value: Industrial temperature rating ensures stable operation inside sealed medical chassis with passive cooling only. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C1008-15ZIN | 1-Mbit (128K × 8), 15 ns, 3.3 V supply, different pinout (x8 vs x16) | Requires bus-width adaptation (two devices or multiplexing); unsuitable for direct x16 replacement | Select only if migrating to 3.3 V systems and redesigning address/data routing |
| IS61LV102416-15TQLI | 1-Mbit (64K × 16), 15 ns, 3.3 V supply, SOJ-44, same pinout but different VCC/VSS placement | Not pin-compatible due to shifted power/ground pins; requires PCB layout change | Choose for new 3.3 V designs needing identical memory map but accepting SOJ footprint revision |
Compared with AS6C1008-15ZIN and IS61LV102416-15TQLI, CY7C1021BN-15VXIT uniquely supports 5 V operation, industrial temperature range, and true x16 byte-select functionality in a pin-identical SOJ-44 package - making it irreplaceable in legacy 5 V embedded systems requiring minimal hardware change.
Availability
CY7C1021BN-15VXIT is available at Aetrix Electronics and suitable for industrial PLCs, legacy microcontroller upgrades, test equipment data acquisition, and medical diagnostic imaging buffers requiring stable component supply across extended product lifecycles.
Supply support for CY7C1021BN-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 markets.
The CY7C1021BN series targets legacy-compatible parallel SRAM applications demanding 5 V operation, industrial temperature resilience, and deterministic timing - especially in control systems where migration to newer architectures is constrained by cost or certification.
FAQ
Is CY7C1021BN-15VXIT pin-compatible with CY7C1021BN-12VC?
Yes - both use identical 44-pin SOJ-400 package with identical pinout and electrical interface. The only difference is guaranteed access time: 15 ns vs 12 ns. Systems designed for 15 ns timing will operate reliably with the -12VC variant, but not vice versa without timing margin verification.
Does CY7C1021BN-15VXIT support 3.3 V operation?
No - it is specified exclusively for 5 V ±10% operation (4.5 V to 5.5 V). Attempting 3.3 V supply results in undefined behavior, failed reads/writes, and potential data corruption. For 3.3 V systems, consider IS61LV102416-15TQLI with appropriate level-shifting.
What is the function of NC pins 22, 23, and 28?
Pins 22, 23, and 28 are No Connect - physically present but unconnected to the silicon die. They must remain unconnected on PCB; routing traces or applying voltage risks internal damage. These pins serve mechanical stability and package symmetry only.
Can BLE and BHE be asserted simultaneously for full 16-bit access?
Yes - asserting both BLE = LOW and BHE = LOW enables simultaneous read or write of all 16 data bits (I/O1–I/O16). This mode matches standard x16 memory transactions and is electrically identical to using a single 16-bit enable signal in simpler SRAMs.
CY7C1021BN-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
CY7C1021BN-15VXIT FAQ
1.How can I place an order for CY7C1021BN-15VXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021BN-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 CY7C1021BN-15VXIT reliable?
The price and inventory of CY7C1021BN-15VXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021BN-15VXIT is usually 5 days.
3.What payment methods are accepted for CY7C1021BN-15VXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021BN-15VXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021BN-15VXIT?
CY7C1021BN-15VXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021BN-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 CY7C1021BN-15VXIT?
For technical support, including CY7C1021BN-15VXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021BN-15VXIT requirements.
6.How does Aetrix verify that CY7C1021BN-15VXIT is sourced from the original manufacturer or authorized distributors?
All CY7C1021BN-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 CY7C1021BN-15VXIT meets industry standards.
7.What is the process for return or replacement of CY7C1021BN-15VXIT?
All CY7C1021BN-15VXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021BN-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 CY7C1021BN-15VXIT part is unused and in its original packaging.
Return procedure for CY7C1021BN-15VXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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