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Infineon Technologies CY62256NL-70PXC
- Part No.:
- CY62256NL-70PXC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
CY62256NL-70PXC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,703
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Product details
Overview
CY62256NL-70PXC from Cypress Semiconductor is a 256K-bit (32K × 8) CMOS static RAM with TTL-compatible I/O, 70 ns access time, 4.5–5.5 V operation, and industrial temperature range (–40°C to +85°C). It features active-low CE/OE/WE controls, automatic power-down when deselected, and low standby current (≤5 μA in LL version), used in legacy industrial controllers and embedded memory expansion subsystems.
For engineers reviewing the CY62256NL-70PXC datasheet, CY62256NL-70PXC pinout, CY62256NL-70PXC application, or CY62256NL-70PXC equivalent, key selection criteria include access timing consistency across voltage/temperature, tristate I/O behavior under OE/CE control, data retention at 2.0 V, and compatibility with 28-pin PDIP footprint for through-hole board upgrades.
Technical Context
The CY62256NL-70PXC implements a full CMOS 32K × 8 SRAM array with dual-decode architecture (row/column), integrated sense amplifiers, and input buffers with ±0.5 V absolute maximum input voltage rating. Its automatic power-down mode activates when CE is HIGH, reducing ICC to ≤5 μA while retaining data at VCC ≥ 2.0 V.
Timing is defined by overlapping CE and WE assertions for write cycles, with tRC = 70 ns, tAA = 70 ns, and tHZOE = 25 ns (CL = 5 pF). Output drive capability is specified at IOH = –1.0 mA (VOH ≥ 2.4 V) and IOL = 2.1 mA (VOL ≤ 0.4 V), ensuring reliable interfacing with 5 V TTL logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K words × 8 bits - supports byte-wide data bus interface without external demultiplexing |
| Access Time (tAA) | 70 ns max - guarantees read data validity within 70 ns after address stabilization at VCC = 4.5–5.5 V, TA = –40°C to +85°C |
| Supply Voltage Range | 4.5 V to 5.5 V - compatible with standard 5 V ±10% power rails and tolerant of transient droop |
| Standby Current (ISB2) | ≤5 μA max (CMOS inputs) - enables ultra-low-power retention during system sleep modes |
| Data Retention Voltage | 2.0 V min - maintains stored data with VCC as low as 2.0 V while CE is deasserted |
| Input/Output Compatibility | TTL-compatible - accepts VIH ≥ 2.2 V, VIL ≤ 0.8 V; drives VOH ≥ 2.4 V, VOL ≤ 0.4 V into 1.0 mA/2.1 mA loads |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade environmental stress without derating |
Pinout & Package
Package: 28-pin plastic DIP (600-mil width), through-hole mounting, JEDEC MS-001 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus accepting 0–32767 to select one of 32K memory locations |
| I/O0–I/O7 | Bidirectional Data Lines | Tristate-capable pins serving as inputs during write, outputs during read, high-Z when OE or CE inactive |
| CE | Chip Enable (active LOW) | Primary device selection signal; HIGH forces automatic power-down and high-Z I/O regardless of OE/WE state |
| OE | Output Enable (active LOW) | Controls I/O direction: LOW enables output drivers; HIGH places I/O in high-impedance input mode |
| WE | Write Enable (active LOW) | Determines operation mode: LOW with CE LOW initiates write; HIGH with CE/OE LOW enables read |
| VCC | Power Supply | +4.5 V to +5.5 V supply pin; decoupling capacitor required near pin 28 for noise immunity |
| GND | Ground Reference | Signal and power return path; must be low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Down Mode | Reduces ICC to ≤5 μA when CE is HIGH, eliminating need for external power-gating circuitry |
| Easy Memory Expansion Support | Dedicated CE and OE enable daisy-chained or parallel bank configurations without glue logic |
| Robust Data Retention | Maintains valid data at VCC = 2.0 V with ISB2 ≤5 μA, supporting battery-backed hold during main power loss |
| High Noise Immunity | Input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and 6 pF input capacitance minimize false triggering in noisy industrial environments |
| Pb-Free and RoHS Compliant | Meets EU Directive 2011/65/EU; available in both leaded and lead-free 28-pin PDIP variants |
Applications
| Industrial PLC Memory Buffer | Legacy Medical Device Data Log |
|---|---|
|
Use Scenario: Stores real-time sensor readings and control state history in programmable logic controllers operating in factory-floor environments with wide thermal swings. IC Role / Device Role / Timing Role: Byte-accessible nonvolatile-adjacent buffer providing deterministic 70 ns read/write latency for cyclic scan execution. Use Value: Industrial temperature rating (–40°C to +85°C) and 5 μA standby current ensure uninterrupted logging during brownouts or thermal cycling. |
Use Scenario: Captures diagnostic waveforms and calibration parameters in portable ECG monitors requiring long battery life between charges. IC Role / Device Role / Timing Role: Low-power SRAM holding volatile acquisition data until flash storage is available; retains content at 2.0 V during power transitions. Use Value: 2.0 V data retention threshold and ≤5 μA ISB2 allow >72-hour backup on coin-cell batteries without external regulators. |
| Automotive Engine Control Module Cache | Avionics Test Equipment Scratchpad |
|
Use Scenario: Serves as temporary instruction/data cache in engine control units where ECU firmware reads configuration tables during startup sequences. IC Role / Device Role / Timing Role: High-speed 70 ns access enables rapid table lookups for fuel mapping and spark timing calculations under real-time constraints. Use Value: TTL-compatible I/O ensures direct interface with legacy 5 V microcontrollers; 55/70 ns speed bin supports deterministic timing margins. |
Use Scenario: Provides fast-access scratchpad memory in benchtop avionics test sets performing MIL-STD-1553 bus protocol analysis and waveform generation. IC Role / Device Role / Timing Role: Standalone 32K × 8 buffer staging captured bus traffic before transfer to host PC via USB or Ethernet. Use Value: 28-pin PDIP package allows easy socket replacement and in-circuit debugging; tristate I/O prevents bus contention during multi-device transfers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AS6C4008-70PCN | Same 32K × 8 organization, 70 ns access, but uses 3.3 V core (3.0–3.6 V); higher standby current (10 μA) | Requires level-shifting for 5 V systems; unsuitable for direct drop-in replacement in legacy 5 V designs | Select only if migrating to 3.3 V architecture and redesigning power delivery |
| IS62C256AL-70QLI | 5 V tolerant, 70 ns, industrial temp, but higher ISB2 (15 μA) and no 2.0 V data retention spec | Lacks guaranteed data retention below 4.5 V; not suitable for battery-backed hold scenarios | Acceptable for cost-sensitive industrial control where full VCC range operation is assured |
Compared with AS6C4008-70PCN and IS62C256AL-70QLI, the CY62256NL-70PXC uniquely delivers 2.0 V data retention and ≤5 μA standby in a 5 V TTL-compatible package-critical for brownout resilience and legacy system compatibility.
Availability
CY62256NL-70PXC is available at Aetrix Electronics and suitable for industrial PLCs, legacy medical devices, automotive ECUs, and avionics test equipment requiring stable component supply and long-lifecycle support.
Supply support for CY62256NL-70PXC 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 and automotive markets.
The CY62256N series was designed specifically for robust, pin-compatible SRAM replacement in legacy 5 V embedded systems requiring industrial temperature operation and low-power retention.
FAQ
Is CY62256NL-70PXC compatible with 5 V TTL logic without level shifters?
Yes. The device has TTL-compatible input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V) and output drive strength (VOH ≥ 2.4 V at –1.0 mA, VOL ≤ 0.4 V at 2.1 mA), enabling direct interface with standard 5 V TTL and CMOS logic families without translation circuitry.
What is the minimum VCC required to retain data when CE is HIGH?
Data retention is guaranteed down to VCC = 2.0 V when CE is HIGH and inputs are held at CMOS levels (VIN > VCC − 0.3 V or VIN < 0.3 V), with ISB2 ≤ 5 μA. This enables battery-backed operation during main power failure.
Does CY62256NL-70PXC support concurrent read/write operations?
No. It is a single-port SRAM: the same I/O pins serve both read and write functions, and operations are mutually exclusive. A write requires CE and WE LOW; a read requires CE and OE LOW with WE HIGH. No internal arbitration or dual-port capability exists.
Can CY62256NL-70PXC be used in place of CY62256N-70PC?
Yes, with identical pinout and AC/DC specifications. The "L" suffix denotes the low-power LL version (ISB2 ≤ 5 μA vs. ≤ 50 μA in non-L versions), making it a functional and drop-in upgrade for reduced standby consumption in existing designs.
CY62256NL-70PXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- MOBL™
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Volatile
- Memory Format:
- SRAM
- Technology:
- SRAM - Asynchronous
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 70ns
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-PDIP
CY62256NL-70PXC FAQ
1.How can I place an order for CY62256NL-70PXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256NL-70PXC 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 CY62256NL-70PXC reliable?
The price and inventory of CY62256NL-70PXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256NL-70PXC is usually 5 days.
3.What payment methods are accepted for CY62256NL-70PXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256NL-70PXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256NL-70PXC?
CY62256NL-70PXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256NL-70PXC 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 CY62256NL-70PXC?
For technical support, including CY62256NL-70PXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256NL-70PXC requirements.
6.How does Aetrix verify that CY62256NL-70PXC is sourced from the original manufacturer or authorized distributors?
All CY62256NL-70PXC 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 CY62256NL-70PXC meets industry standards.
7.What is the process for return or replacement of CY62256NL-70PXC?
All CY62256NL-70PXC units undergo pre-shipment inspection (PSI). If there is an issue with CY62256NL-70PXC, 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 CY62256NL-70PXC part is unused and in its original packaging.
Return procedure for CY62256NL-70PXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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