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Infineon Technologies CY7C128A-15VC
- Part No.:
- CY7C128A-15VC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 24-BSOJ (0.300", 7.62mm Width)
- Datasheet:
-
CY7C128A-15VC.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 24SOJ
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
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Product details
Overview
CY7C128A-15VC from Cypress Semiconductor is a 2K × 8 CMOS static RAM organized as 2048 words by 8 bits, featuring 15 ns maximum access time, TTL-compatible I/O, automatic CE-controlled power-down (83% reduction), and 5 V ±10% supply operation. It serves as fast, low-power data storage in microcontroller-based instrumentation, legacy industrial controllers, and embedded systems requiring deterministic read/write timing.
For engineers reviewing the CY7C128A-15VC datasheet, CY7C128A-15VC pinout, CY7C128A-15VC application, or CY7C128A-15VC equivalent, key selection criteria include access time consistency across temperature, CE/OE/WE control logic compatibility with 8-bit bus architectures, standby current under deselected conditions, and SOJ-24 package suitability for high-density PCB layouts.
Technical Context
The CY7C128A-15VC implements a fully static memory array with asynchronous parallel interface, using separate Chip Enable (CE), Output Enable (OE), and Write Enable (WE) controls to manage read, write, and three-state output behavior. Its architecture supports easy expansion via CE daisy-chaining and maintains data integrity without refresh cycles.
Power management is handled through automatic CE-driven power-down: when CE is HIGH, internal circuitry enters low-power state with ISB1 ≤ 40 mA (commercial), while maintaining full address/data retention. All inputs meet MIL-STD-883 ESD rating >2001 V, and outputs drive ±4 mA VOH/VOL at TTL levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2048 × 8 bits - provides 2 KB of byte-addressable SRAM space compatible with 8-bit microprocessor data buses. |
| Access Time (tAA) | 15 ns max - guarantees deterministic read latency for real-time control loops operating up to ~66 MHz effective bus rate. |
| VCC Supply | 5 V ±10% - matches standard TTL/CMOS logic rails; eliminates need for dedicated voltage regulation in legacy designs. |
| Standby Current (ISB1) | 40 mA max (commercial) - enables low-power hold mode during processor sleep without external power gating. |
| Input Voltage (VIH/VIL) | VIH = 2.2 V min, VIL = 0.8 V max - ensures robust noise margin and direct interfacing with 5 V TTL and CMOS outputs. |
| ESD Rating | >2001 V (MIL-STD-883 Method 3015) - supports handling and board-level reliability in unshielded industrial environments. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded applications including test equipment and point-of-sale terminals. |
Pinout & Package
Package: 24-Lead Molded SOJ (V13), 300-mil width, gull-wing leads, JEDEC MS-013 compliant. Pin pitch: 1.27 mm. Body dimensions: 7.62 mm × 19.05 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit address bus accepting 0–2047 to select one of 2048 memory locations. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit tristatable I/O lines shared for read data output and write data input; high-impedance when CE or OE is HIGH. |
| CE | Chip Enable (active LOW) | Primary device select; enables memory array and drivers; triggers automatic power-down when HIGH. |
| OE | Output Enable (active LOW) | Controls output drivers only; allows read access while CE remains asserted; no effect on power state. |
| WE | Write Enable (active LOW) | Enables write operation when CE is also LOW; latches data on rising edge of WE or CE, whichever occurs last. |
| VCC | Power Supply | +5 V supply pin (Pin 24); decoupling capacitor required within 10 mm for stable 15 ns timing. |
| GND | Ground Reference | Signal and power ground (Pin 12); must be low-inductance connection to minimize switching noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-Down | Reduces ICC from 120 mA active to ≤40 mA standby-eliminates need for external power sequencing in battery-backed or intermittent-use systems. |
| TTL-Compatible I/O | VOH ≥ 2.4 V @ –4 mA, VOL ≤ 0.4 V @ 8 mA-ensures interoperability with legacy 5 V microcontrollers (e.g., 8051, Z80) without level-shifting. |
| High ESD Immunity | Withstands >2001 V HBM-reduces field failure risk in manufacturing, repair, and deployment environments lacking strict ESD controls. |
| Alpha Particle Hardening | Die coat process mitigates single-event upsets-critical for long-life instrumentation deployed in terrestrial radiation-prone settings. |
Applications
| Industrial PLC I/O Buffering | Medical Diagnostic Data Capture |
|---|---|
Use Scenario: Storing real-time sensor readings and control command history in programmable logic controllers with cyclic scan times < 10 ms. IC Role / Device Role / Timing Role: Byte-wide SRAM buffer between CPU and isolated I/O modules; accessed synchronously with 15 ns tAA ensuring zero-cycle wait states. Use Value: Eliminates FIFO overflow during burst acquisition and enables deterministic response to emergency stop signals via immediate memory access. | Use Scenario: Capturing raw analog-to-digital converter output from multi-channel ECG or ultrasound front-ends before DSP processing. IC Role / Device Role / Timing Role: High-speed data staging memory; accepts parallel 8-bit samples at up to 10 MHz sustained write rate using WE-controlled cycles. Use Value: Prevents sample loss during transient signal spikes by providing guaranteed 15 ns write setup/hold margins under worst-case temperature and voltage. |
| Legacy Avionics Display Controller | Test & Measurement Equipment FIFO |
Use Scenario: Holding frame buffer contents for monochrome CRT or LED matrix displays in certified airborne systems with long service life requirements. IC Role / Device Role / Timing Role: Non-refreshed display memory mapped into CPU address space; retains image data indefinitely while powered, even during CPU reset. Use Value: Meets DO-254 design assurance requirements via proven radiation-hardened die construction and zero-refresh architecture. | Use Scenario: Acting as first-stage acquisition buffer in digital oscilloscopes and logic analyzers where deep memory depth is constrained by cost and board area. IC Role / Device Role / Timing Role: High-reliability intermediate storage between ADC and FPGA-based decimation engine; operated in burst-write, sequential-read mode. Use Value: Enables 2 KB contiguous capture window with sub-ns timing jitter-critical for accurate glitch detection and timing analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61LV256AL-10TLI | 32K × 8 organization, 10 ns access, 3.3 V supply only | Requires level translation for 5 V systems; higher density but incompatible voltage domain | Select only if migrating to 3.3 V architecture and needing >2 KB capacity. |
| AS6C4008-15PCN | 512K × 8, 15 ns, 5 V supply, SOIC-28 package | Larger footprint (28-pin vs. 24-pin), higher standby current (50 µA vs. 40 mA), no automatic power-down | Choose for higher density where board layout permits larger package and external power control is acceptable. |
Compared with IS61LV256AL-10TLI and AS6C4008-15PCN, the CY7C128A-15VC uniquely delivers 5 V compatibility, automatic CE-triggered power-down, and SOJ-24 footprint-making it irreplaceable in cost-sensitive, space-constrained, legacy 5 V designs requiring guaranteed 15 ns timing and zero-refresh operation.
Availability
CY7C128A-15VC is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic devices, legacy avionics displays, and test equipment requiring stable component supply over extended production lifecycles.
Supply support for CY7C128A-15VC 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) is a U.S.-based semiconductor company specializing in memory, microcontrollers, and programmable solutions for industrial, automotive, and consumer markets.
The CY7C128A belongs to Cypress's legacy parallel SRAM product line, designed specifically for drop-in replacement of obsolete 2K×8 TTL memories in systems where timing predictability, 5 V compatibility, and long-term obsolescence mitigation are critical.
FAQ
What is the minimum pulse width required for WE to guarantee a valid write cycle?
The CY7C128A-15VC requires a minimum WE pulse width (tPWE) of 12 ns under commercial conditions. This value is validated across 0°C to +70°C and 4.5 V to 5.5 V VCC, ensuring reliable write latching without race conditions in synchronous bus interfaces tied to 5 V microcontrollers.
Does the CY7C128A-15VC require an external clock signal?
No. The CY7C128A-15VC is a fully static asynchronous SRAM and operates without any clock input. Data access is controlled solely by the timing relationships among CE, OE, WE, and address transitions-enabling use in systems with no clock distribution infrastructure.
Can the I/O pins be driven while CE is HIGH?
No. When CE is HIGH, all I/O pins enter high-impedance state regardless of OE or WE status. This is enforced by internal output disable logic and is specified in the DC characteristics table under IOZ (≤ ±10 µA leakage), ensuring safe bus sharing in multidrop configurations.
Is the CY7C128A-15VC RoHS-compliant?
The CY7C128A-15VC was manufactured prior to RoHS enforcement and uses leaded solder in its SOJ package. It is not RoHS-compliant per Directive 2011/65/EU; however, it remains available under exemption 7a (high-melting-temperature solder) for legacy industrial and aerospace applications requiring long-term supply stability.
CY7C128A-15VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 24-BSOJ (0.300", 7.62mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 16Kbit
- Memory Organization:
- 2K x 8
- 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:
- 24-SOJ
CY7C128A-15VC FAQ
1.How can I place an order for CY7C128A-15VC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C128A-15VC 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 CY7C128A-15VC reliable?
The price and inventory of CY7C128A-15VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C128A-15VC is usually 5 days.
3.What payment methods are accepted for CY7C128A-15VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C128A-15VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C128A-15VC?
CY7C128A-15VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C128A-15VC 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 CY7C128A-15VC?
For technical support, including CY7C128A-15VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C128A-15VC requirements.
6.How does Aetrix verify that CY7C128A-15VC is sourced from the original manufacturer or authorized distributors?
All CY7C128A-15VC 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 CY7C128A-15VC meets industry standards.
7.What is the process for return or replacement of CY7C128A-15VC?
All CY7C128A-15VC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C128A-15VC, 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 CY7C128A-15VC part is unused and in its original packaging.
Return procedure for CY7C128A-15VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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