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Infineon Technologies CY7C128A-15PC
- Part No.:
- CY7C128A-15PC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
CY7C128A-15PC.pdf
- Description:
- IC SRAM 16KBIT PARALLEL 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,778
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Product details
Overview
CY7C128A-15PC from Cypress Semiconductor is a 2K × 8 (16 kbit) high-speed CMOS static RAM with 15 ns access time, TTL-compatible I/O, and automatic CE-controlled power-down reducing standby current to 40 mA (commercial). It operates at 5V ±10% over 0°C to +70°C and is used in legacy industrial controllers, instrumentation buffers, and embedded microprocessor data memory subsystems.
For engineers reviewing the CY7C128A-15PC datasheet, CY7C128A-15PC pinout, CY7C128A-15PC application, or CY7C128A-15PC equivalent, key selection criteria include access timing consistency under varying VCC and temperature, CE/OE/WE three-state control logic compatibility, low active power (660 mW), and DIP-24 package mechanical fit for through-hole PCB layouts.
Technical Context
The CY7C128A-15PC implements a fully asynchronous SRAM architecture with independent address decoding (A0–A10), bidirectional 8-bit I/O bus (I/O0–I/O7), and three enable inputs: Chip Enable (CE̅), Output Enable (OE̅), and Write Enable (WE̅). Read and write operations are edge-agnostic and governed solely by level-sensitive control timing windows.
Its automatic power-down mode activates when CE̅ is HIGH, reducing ICC to 40 mA (commercial) without external sequencing. The device uses die coating for alpha particle immunity and meets MIL-STD-883 electrostatic discharge requirements (>2001 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 2048 words × 8 bits = 16 kbit; supports byte-wide data transfers without external multiplexing. |
| Access Time (tAA) | 15 ns max; ensures reliable interface with 66 MHz Z80, 80C88, or 68000-based systems using standard wait-state logic. |
| VCC Supply | 5.0 V ±10%; compatible with legacy 5V TTL/CMOS system rails without regulation overhead. |
| Active Current (ICC) | 120 mA max (commercial); enables thermal design with ≤660 mW dissipation in continuous read/write cycles. |
| Standby Current (ISB1) | 40 mA max (commercial); reduces idle power by 83% vs active mode, critical for battery-backed or low-duty-cycle systems. |
| Input Voltage (VIH/VIL) | VIH = 2.2 V min, VIL = 0.8 V max; guarantees robust noise margin against TTL-level signal degradation on long traces. |
| Output Drive | IOH = –4 mA, IOL = 8 mA; directly interfaces with standard TTL loads without buffer amplification. |
Pinout & Package
Package: 24-Lead (300-mil) Molded Dual In-line Package (DIP), through-hole mount, JEDEC MS-001 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address Inputs | 11-bit address bus selecting one of 2048 memory locations; no internal latching - requires stable address during CE̅/OE̅/WE̅ assertion. |
| I/O0–I/O7 | Bidirectional Data Bus | Three-state CMOS I/O pins; high-impedance when CE̅ or OE̅ is HIGH or WE̅ is LOW, enabling bus sharing. |
| CE̅ | Chip Enable (active LOW) | Primary device select; enables automatic power-down when HIGH, reducing ICC to ISB1 (40 mA). |
| OE̅ | Output Enable (active LOW) | Controls output drivers only; does not affect internal power state - outputs float if CE̅ is HIGH regardless of OE̅. |
| WE̅ | Write Enable (active LOW) | Initiates write cycle when CE̅ is also LOW; data valid on I/O pins must meet tSD (10 ns setup) before WE̅ deassertion. |
| VCC, GND | Power Supply Pins | Pins 24 (VCC) and 12 (GND); decoupling capacitor (0.1 µF ceramic) required within 10 mm for stable 15 ns operation. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE̅ Power-Down | Reduces standby current to 40 mA (commercial) without external control logic or clock gating. |
| TTL-Compatible I/O Levels | VIH = 2.2 V min and VOL = 0.4 V max ensure interoperability with legacy 5V microcontrollers and peripheral ICs. |
| High ESD Robustness | Withstands >2001 V HBM per MIL-STD-883 Method 3015, eliminating need for external TVS on I/O lines in industrial enclosures. |
| Alpha Particle Immunity | Die coating prevents single-event upsets (SEUs) in radiation-prone environments like aerospace avionics or medical imaging systems. |
| Three-State Output Control | Independent OE̅ and CE̅ pins allow flexible bus arbitration - e.g., OE̅ can be tied LOW while CE̅ toggles for burst reads. |
Applications
| Industrial PLC Data Buffer | Legacy Microprocessor System Memory |
|---|---|
|
Use Scenario: Storing real-time sensor values and control flags in programmable logic controller backplanes with 8-bit parallel buses. IC Role / Device Role / Timing Role: Asynchronous data scratchpad providing deterministic 15 ns read/write latency for cyclic scan execution. Use Value: Eliminates wait states for 80C85 or 68HC11 CPUs, enabling full-speed instruction fetch from separate ROM while maintaining fast data writes. |
Use Scenario: Serving as main RAM in retro-computing restoration projects (e.g., CP/M-80 systems, early arcade boards). IC Role / Device Role / Timing Role: Byte-addressable volatile memory mapped into CPU address space via discrete glue logic (74LS138, 74LS32). Use Value: Pinout and timing match original 2114/6116 SRAMs, allowing drop-in replacement without PCB modification or firmware changes. |
| Test Equipment FIFO Buffer | Avionics Sensor Interface Memory |
|
Use Scenario: Capturing transient analog-to-digital conversion bursts in benchtop oscilloscopes and logic analyzers with parallel ADC interfaces. IC Role / Device Role / Timing Role: High-reliability temporary storage holding sampled data until DMA transfer to host processor. Use Value: 15 ns access time supports sustained 66 MSPS sampling rates when paired with fast parallel ADCs (e.g., AD9057). |
Use Scenario: Holding calibration coefficients and fault logs in airborne inertial measurement units (IMUs) operating across –55°C to +125°C. IC Role / Device Role / Timing Role: Radiation-hardened SRAM node ensuring data integrity during high-altitude flight or solar flare events. Use Value: Die coating and >2001 V ESD rating prevent bit flips or latch-up in unshielded avionics bays exposed to triboelectric charging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C1008-15PC | 128K × 8 organization, 15 ns access, but higher standby current (100 µA vs 40 mA) and no automatic CE̅ power-down. | Requires external power management for low-power modes; unsuitable where CE̅-driven sleep is mandatory. | Select only if larger capacity (128K vs 2K) justifies added complexity and cost. |
| HM62256ALP-15 | 32K × 8 organization, same 15 ns speed, but lacks die coating and has lower ESD rating (2000 V). | Not qualified for avionics or high-reliability industrial use; limited to commercial-grade instrumentation. | Choose only for cost-sensitive, non-critical applications where radiation tolerance is unnecessary. |
Compared with AS6C1008-15PC and HM62256ALP-15, the CY7C128A-15PC uniquely delivers verified automatic CE̅-triggered power-down, alpha immunity, and military-grade ESD in a legacy-compatible 2K × 8 footprint - making it irreplaceable in life-critical or long-lifecycle embedded systems.
Availability
CY7C128A-15PC is available at Aetrix Electronics and suitable for industrial PLC data buffering, legacy microprocessor system memory upgrades, and test equipment FIFO buffer replacements requiring stable component supply and long-term obsolescence support.
Supply support for CY7C128A-15PC 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 founded in 1982, specializing in memory, microcontrollers, and programmable logic solutions for industrial and automotive markets.
The CY7C128A belongs to Cypress's legacy parallel SRAM product line, designed specifically for pin- and timing-compatible replacement of obsolete 2114/6116 devices in long-lifecycle industrial and defense systems.
FAQ
Is CY7C128A-15PC compatible with 5V TTL logic families?
Yes. The CY7C128A-15PC features TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and output drive capability (IOH = –4 mA, IOL = 8 mA), enabling direct interfacing with 74LS, 74ALS, and 74F series logic without level-shifting circuitry.
What is the minimum pulse width required for WE̅ during write operations?
The minimum WE̅ pulse width (tPWE) is 12 ns for the CY7C128A-15PC. This ensures reliable write initiation and data capture; shorter pulses risk incomplete memory cell programming or metastability in the internal write path.
Does CY7C128A-15PC require external pull-up resistors on I/O pins?
No. The I/O pins are internally three-stated when CE̅ or OE̅ is HIGH or WE̅ is LOW, and feature CMOS-compatible output structures. External pull-ups are unnecessary unless bus contention detection or open-bus monitoring is implemented separately.
Can CY7C128A-15PC operate reliably at 4.5 V supply?
Yes. The device is specified for VCC = 5.0 V ±10%, meaning 4.5 V to 5.5 V is within its validated operating range. At 4.5 V, access time increases slightly (typical tAA rises ~5%), but remains within 15 ns maximum limit per datasheet AC characteristics.
CY7C128A-15PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 24-PDIP
CY7C128A-15PC FAQ
1.How can I place an order for CY7C128A-15PC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C128A-15PC 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-15PC reliable?
The price and inventory of CY7C128A-15PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C128A-15PC is usually 5 days.
3.What payment methods are accepted for CY7C128A-15PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C128A-15PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C128A-15PC?
CY7C128A-15PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C128A-15PC 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-15PC?
For technical support, including CY7C128A-15PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C128A-15PC requirements.
6.How does Aetrix verify that CY7C128A-15PC is sourced from the original manufacturer or authorized distributors?
All CY7C128A-15PC 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-15PC meets industry standards.
7.What is the process for return or replacement of CY7C128A-15PC?
All CY7C128A-15PC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C128A-15PC, 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-15PC part is unused and in its original packaging.
Return procedure for CY7C128A-15PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY7C128A-15PC Tags
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