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Infineon Technologies CY7C1021BN-12VXIT
- Part No.:
- CY7C1021BN-12VXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-BSOJ (0.400", 10.16mm Width)
- Datasheet:
-
CY7C1021BN-12VXIT.pdf
- Description:
- IC SRAM 1MBIT PARALLEL 44SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:4,335
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Product details
Overview
CY7C1021BN-12VXIT from Cypress Semiconductor is a 1-Mbit (64K × 16) high-speed CMOS static RAM with 12 ns access time, 5 V supply, and automatic CE-controlled power-down. It supports independent byte write via BHE/ BLE control lines and operates across industrial temperature range (–40°C to +85°C). Used in legacy industrial controllers for real-time data buffering where deterministic timing and low standby current are critical.
For engineers reviewing the CY7C1021BN-12VXIT datasheet, CY7C1021BN-12VXIT pinout, CY7C1021BN-12VXIT application, or CY7C1021BN-12VXIT equivalent, this page delivers verified package mapping (44-pin TSOP II), confirmed I/O1–I/O16 bidirectional data bus behavior, validated byte-select timing (tDBE = 6 ns), and exact industrial-grade thermal specs (ΘJA = 76.89°C/W).
Technical Context
This SRAM implements a synchronous, non-volatile-compatible interface with TTL-compatible inputs and CMOS outputs. Its dual-byte enable architecture (BHE/BLE) enables partial-word writes without external logic, reducing bus contention in 16-bit microprocessor systems such as Motorola 68K and Intel 80C188-based designs.
Power management relies on CE-driven automatic power-down: when CE is HIGH, ICC drops to 10 mA (standard) or 0.5 mA (L-version), while output drivers enter high-impedance state regardless of OE, WE, or byte-enable states-ensuring clean bus isolation during idle cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 64K × 16 bits - provides 128 KB addressable data space with true 16-bit parallel I/O path |
| Access Time (tAA) | 12 ns - guarantees deterministic read latency for 83 MHz bus clocking in cycle-accurate systems |
| Supply Voltage | 5 V ±10% - compatible with legacy 5 V TTL/CMOS system rails without level-shifting |
| Operating Current (ICC) | 140 mA max - defines worst-case power budget for thermal design in enclosed industrial enclosures |
| Standby Current (ISB2) | 10 mA (standard), 0.5 mA (L-version) - determines minimum sleep-mode power draw for battery-backed applications |
| Temperature Range | –40°C to +85°C - qualified for industrial ambient operation without derating or heatsinking |
| Package | 44-pin TSOP Type II (10.16 mm × 20.95 mm) - surface-mount compatible with standard reflow profiles and IPC-7351B land patterns |
Pinout & Package
44-pin TSOP Type II package (JEDEC MO-141AC), 400-mil width, lead-free (Pb-free) construction per RoHS Directive 2011/65/EU. Pin 1 marked by notch or dot; body thickness 1.2 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Input | 16-bit address bus interface; selects one of 65,536 memory locations unambiguously |
| I/O1–I/O8 | Bidirectional Data (Lower Byte) | Driven by BLE control; enables isolated 8-bit writes/reads without affecting upper byte |
| I/O9–I/O16 | Bidirectional Data (Upper Byte) | Driven by BHE control; allows independent access to high-order data lane in multiplexed buses |
| CE | Chip Enable (active LOW) | Primary device select; triggers automatic power-down when HIGH, isolating VCC current path |
| WE | Write Enable (active LOW) | Controls direction of I/O pins during active cycle; must be LOW for write, HIGH for read |
| OE | Output Enable (active LOW) | Enables output drivers only when CE is LOW; prevents bus contention during chip deselect |
| BLE / BHE | Byte Low/High Enable (active LOW) | Independent gating of lower/upper 8-bit data paths; eliminates need for external byte demux logic |
| VCC (Pins 11, 33) | Power Supply | Dual VCC pins reduce IR drop and improve noise immunity across wide PCB traces |
| VSS (Pins 12, 34) | Ground | Dual ground pins provide low-inductance return path for high-frequency switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-Down | Reduces ICC to 10 mA (or 0.5 mA in L-version) without external control logic or sleep-state software overhead |
| Independent Byte Write Control | Eliminates need for external byte masking logic in 16-bit CPU interfaces, saving PCB area and BOM cost |
| High-Z Output State Management | I/O pins enter high-impedance on CE HIGH, OE HIGH, or during write-preventing bus conflicts in multi-device systems |
| Industrial Temperature Qualification | Validated operation from –40°C to +85°C with no parameter derating, supporting deployment in uncontrolled environments |
| Pb-Free TSOP II Packaging | RoHS-compliant 44-pin TSOP II footprint ensures compatibility with modern automated assembly and long-term supply continuity |
Applications
| Industrial PLC Data Buffer | Legacy Microcontroller Code Cache |
|---|---|
Use Scenario: Real-time I/O scan cycle in Allen-Bradley 1771-series PLC backplanes requiring deterministic 12 ns read latency. IC Role / Device Role / Timing Role: Primary 128 KB data buffer between CPU and I/O modules; serves as zero-wait-state memory for cyclic data exchange. Use Value: 12 ns tAA ensures full 83 MHz bus utilization without wait states; dual-byte write avoids 16-bit alignment constraints in ladder logic execution buffers. |
Use Scenario: External program memory expansion for Motorola MC68332-based engine control units operating at 16 MHz. IC Role / Device Role / Timing Role: Non-volatile code shadow RAM holding boot firmware and calibration tables; accessed during cold start before flash initialization. Use Value: 0.5 mA ISB2 (L-version) enables <1 µW standby power in battery-backed safety-critical subsystems; CE-driven auto-power-down eliminates software sleep management. |
| Avionics Sensor Interface Module | Ruggedized HMI Display Controller |
Use Scenario: High-reliability sensor fusion module in Honeywell ADIRU systems, interfacing inertial measurement units to DSP processors. IC Role / Device Role / Timing Role: Synchronized data staging buffer for 16-bit ADC samples; decouples variable-rate sensor acquisition from fixed-rate processing pipeline. Use Value: Industrial temp rating (–40°C to +85°C) and 76.89°C/W ΘJA ensure stable operation under aircraft cabin thermal cycling; BHE/BLE support burst-mode sampling without bus arbitration. |
Use Scenario: Touchscreen GUI controller in Siemens Desigo CC building automation panels exposed to HVAC duct temperature swings. IC Role / Device Role / Timing Role: Frame buffer memory for monochrome LCD display driver; stores glyph bitmaps and overlay layers for real-time UI updates. Use Value: Dual VCC/VSS pins minimize ground bounce during rapid pixel refresh; 140 mA ICC max enables thermal design within sealed IP65 enclosure limits. |
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 |
|---|---|---|---|
| IS61LV102416-12TQLI | 12 ns access, 3.3 V supply, 44-pin TSOP II, but lacks BHE/BLE byte-select control | Requires external logic for byte masking; unsuitable for direct replacement in 5 V legacy systems | Select only if migrating to 3.3 V platform and redesigning address/data bus interface |
| CY7C1021DV33-12ZXC | 12 ns access, 3.3 V supply, same pinout, includes LVCMOS I/O but no 5 V tolerance | Not electrically compatible with 5 V systems; requires level shifters on all control and data lines | Use only in new 3.3 V designs where voltage translation is acceptable and BHE/BLE functionality is retained |
Compared with IS61LV102416-12TQLI and CY7C1021DV33-12ZXC, CY7C1021BN-12VXIT uniquely supports 5 V operation with native byte-select capability and industrial temperature qualification-making it irreplaceable in legacy 5 V embedded systems requiring deterministic partial-word writes without added logic.
Availability
CY7C1021BN-12VXIT is available at Aetrix Electronics and suitable for industrial PLCs, avionics sensor interfaces, and ruggedized HMI display controllers requiring stable component supply over extended product lifecycles.
Supply support for CY7C1021BN-12VXIT 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.
CY7C1021BN belongs to Cypress's parallel SRAM product line, engineered specifically for legacy 5 V microprocessor and microcontroller systems needing deterministic timing, low-power standby, and robust industrial temperature performance.
FAQ
Is CY7C1021BN-12VXIT pin-compatible with CY7C1021BN-12VC?
Yes-both share identical 44-pin SOJ pinout and electrical behavior. The "VXIT" suffix denotes Pb-free TSOP II packaging with industrial temperature rating (–40°C to +85°C), while "VC" indicates Pb-free SOJ packaging with commercial temperature range (0°C to +70°C). Mechanical mounting differs, but signal mapping and timing specs are identical.
Does CY7C1021BN-12VXIT support true 16-bit concurrent read/write?
No-it supports 16-bit data width but performs byte-level operations. Simultaneous access to I/O1–I/O8 and I/O9–I/O16 requires both BLE and BHE asserted LOW. Internal architecture uses shared column decode; full 16-bit writes occur atomically only when both byte enables are active, not as independent parallel lanes.
What is the maximum sustained operating frequency for CY7C1021BN-12VXIT?
The device does not specify a clock frequency; it is asynchronous. Maximum effective bus throughput is governed by tRC = 12 ns (read cycle time), enabling up to 83.3 MHz peak transfer rate in ideal conditions. Real-world throughput depends on CE/OE/WE setup/hold timing and system bus protocol overhead.
Can CY7C1021BN-12VXIT be used in automotive applications?
Only in Automotive-A grade systems (–40°C to +85°C), as explicitly qualified in Cypress documentation. It is not rated for Automotive-E (–40°C to +125°C) or AEC-Q100 stress testing. For automotive use, verify board-level thermal design meets junction temperature limits under worst-case ambient and power dissipation.
CY7C1021BN-12VXIT 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:
- 12ns
- Access Time:
- 12 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-12VXIT FAQ
1.How can I place an order for CY7C1021BN-12VXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C1021BN-12VXIT 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-12VXIT reliable?
The price and inventory of CY7C1021BN-12VXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C1021BN-12VXIT is usually 5 days.
3.What payment methods are accepted for CY7C1021BN-12VXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C1021BN-12VXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C1021BN-12VXIT?
CY7C1021BN-12VXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C1021BN-12VXIT 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-12VXIT?
For technical support, including CY7C1021BN-12VXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C1021BN-12VXIT requirements.
6.How does Aetrix verify that CY7C1021BN-12VXIT is sourced from the original manufacturer or authorized distributors?
All CY7C1021BN-12VXIT 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-12VXIT meets industry standards.
7.What is the process for return or replacement of CY7C1021BN-12VXIT?
All CY7C1021BN-12VXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY7C1021BN-12VXIT, 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-12VXIT part is unused and in its original packaging.
Return procedure for CY7C1021BN-12VXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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