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Infineon Technologies CY62256LL-70PC
- Part No.:
- CY62256LL-70PC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
CY62256LL-70PC.pdf
- Description:
- IC SRAM 256KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,044
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Product details
Overview
CY62256LL-70PC from Cypress Semiconductor is a 256 Kbit (32K × 8) CMOS static RAM with 70 ns access time, 4.5–5.5 V operation, and industrial temperature range (–40°C to +85°C). It features TTL-compatible I/O, automatic CE-controlled power-down (28 µW max standby), and three-state outputs-used in embedded controllers, industrial PLCs, and legacy instrumentation requiring nonvolatile SRAM backup.
For engineers reviewing the CY62256LL-70PC datasheet, CY62256LL-70PC pinout, CY62256LL-70PC application, or CY62256LL-70PC equivalent, key selection criteria include access timing consistency across voltage/temperature, low ISB2 leakage under CMOS input conditions, CE/OE/WE control logic compatibility, and narrow SOIC-28 package footprint for space-constrained PCB layouts.
Technical Context
The CY62256LL-70PC implements a fully static 512 × 512 memory array with separate row/column decoders, sense amplifiers, and input buffers. Its CE-driven automatic power-down reduces ICC to ≤0.5 µA when CE > VCC − 0.3 V and all inputs are at valid CMOS levels.
Read operations require CE and OE LOW with WE HIGH; writes occur when CE and WE are both LOW. Output drivers enter high-impedance state within 20–25 ns of OE or CE deassertion, and data hold time after address change is guaranteed at 5 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32K × 8 bits - supports byte-wide data bus without external demultiplexing |
| Access Time (tAA) | 70 ns max - ensures reliable read timing at 14.3 MHz system clock edge alignment |
| VCC Operating Range | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic rails and brown-out tolerant |
| Standby Current (ISB2) | 5 µA max (CMOS inputs) - enables ultra-low-power retention in battery-backed systems |
| Active Power (ICC) | 50 mA max - corresponds to 275 mW typical active dissipation at 5 V |
| Input/Output Compatibility | TTL-level VIH/VIL and VOH/VOL - interoperable with legacy 5 V microcontrollers and FPGAs |
| Package Type | 28-pin narrow SOIC (450-mil width) - surface-mount compatible with IPC-7351B land pattern |
Pinout & Package
Package: 28-pin narrow SOIC (450-mil body width, 300-mil package width), RoHS-compliant lead-free option available.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word addressing; no internal latching required |
| I/O0–I/O7 | Bidirectional Data Lines | Three-state CMOS I/O pins shared for read/write; high-impedance when CE or OE inactive |
| CE | Chip Enable (active LOW) | Primary device select; initiates automatic power-down when HIGH under CMOS input conditions |
| OE | Output Enable (active LOW) | Controls output driver direction; disables outputs (high-Z) when HIGH during reads/writes |
| WE | Write Enable (active LOW) | Determines operation mode: LOW = write, HIGH = read; timing-critical for setup/hold compliance |
| VCC | Power Supply | +5 V nominal supply; accepts 4.5–5.5 V range with monotonic ICC vs. VCC behavior |
| GND | Ground Reference | Common return path for all signals and power; decoupling required within 10 mm of VCC pin |
Key Features
| Feature | Design Value |
|---|---|
| Automatic CE Power-down | Reduces ISB2 to ≤5 µA without external control logic or sleep-mode software overhead |
| Three-State Output Drivers | Guaranteed 20–25 ns high-Z transition on OE/CE deassertion-prevents bus contention in multi-SRAM systems |
| 70 ns Access with 5 V Operation | Meets timing closure for 8/16-bit microcontrollers running at ≤14 MHz without wait states |
| Industrial Temperature Support | Validated operation from –40°C to +85°C with no derating-suitable for factory automation hardware |
| Standard SOIC-28 Footprint | Drop-in replacement for legacy 28-pin SRAMs (e.g., HM62256, IS61C256) without board redesign |
Applications
| Industrial PLC Memory Buffer | Legacy Medical Instrument Data Cache |
|---|---|
|
Use Scenario: Stores real-time sensor acquisition buffers and configuration registers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Byte-accessible SRAM providing deterministic 70 ns read/write latency for cyclic I/O scan execution. Use Value: Eliminates need for external power management circuitry due to sub-5 µA ISB2, extending battery backup runtime beyond 10 years. |
Use Scenario: Holds calibration coefficients and waveform history in portable ECG analyzers with battery backup. IC Role / Device Role / Timing Role: Nonvolatile-support SRAM interfaced directly to 8051-based controller via parallel bus with CE/OE/WE handshaking. Use Value: TTL-compatible I/O ensures signal integrity across long PCB traces in mixed-signal analog/digital sections without level shifters. |
| Avionics Display Frame Buffer | Test Equipment Pattern Generator Memory |
|
Use Scenario: Buffers rasterized display data for monochrome cockpit displays operating in extended temperature environments. IC Role / Device Role / Timing Role: High-reliability SRAM delivering consistent tAA across –40°C to +85°C with no access time degradation. Use Value: Industrial-grade qualification and 93.89 °C/W ΘJA in TSOP-1 enable conduction-cooled mounting without forced airflow. |
Use Scenario: Stores digital stimulus patterns in automated test equipment generating repetitive 100 kHz–1 MHz waveforms. IC Role / Device Role / Timing Role: Synchronous read buffer synchronized to pattern generator clock using CE-gated burst reads. Use Value: 5 ns address hold time (tOHA) and 5 ns output enable delay (tLZOE) support tight timing margins in high-speed digital test vectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar static RAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IS61C256AL-15MLI | 15 ns access time, 3.3 V only, 28-pin SOIC; higher speed but incompatible voltage domain | Requires 3.3 V system redesign; unsuitable for 5 V legacy backplanes | Select only if migrating entire design to 3.3 V and needing faster access |
| HM62256BLP-70 | 70 ns access, 5 V, but 250 µA ISB2 (vs. 5 µA), no automatic CE power-down | Lacks low-power retention capability; requires external gating for standby current reduction | Prefer only when cost sensitivity outweighs power budget constraints in non-battery systems |
Compared with IS61C256AL-15MLI and HM62256BLP-70, the CY62256LL-70PC uniquely delivers 5 V compatibility, industrial temperature rating, and sub-5 µA CMOS standby current in a drop-in SOIC-28 package-making it the sole choice for maintaining legacy 5 V designs with stringent power retention requirements.
Availability
CY62256LL-70PC is available at Aetrix Electronics and suitable for industrial PLCs, legacy medical instruments, and avionics display subsystems requiring stable component supply and long-term obsolescence management.
Supply support for CY62256LL-70PC 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.
The CY62256 family was engineered specifically for 5 V embedded systems needing pin-compatible SRAM upgrades with enhanced power efficiency and extended temperature operation-targeting industrial control and instrumentation markets.
FAQ
Does CY62256LL-70PC support true 5 V operation across its full industrial temperature range?
Yes. The device is fully specified for 4.5–5.5 V operation from –40°C to +85°C, with all AC/DC parameters-including tAA (70 ns), ISB2 (≤5 µA), and VOH/VOL-guaranteed across this range per Rev. *E datasheet Table "Electrical Characteristics Over the Operating Range".
What is the minimum CE pulse width required to guarantee automatic power-down entry?
No minimum CE pulse width is required: power-down activates immediately upon CE exceeding VCC − 0.3 V under CMOS input conditions. The 0.1 µA ISB2 spec applies once CE remains above that threshold and all other inputs are at valid CMOS logic levels, per datasheet page 4, ISB2 row.
Can CY62256LL-70PC be used in place of HM62256 without changes to PCB layout?
Yes, in narrow SOIC-28 package variants. Pinout is identical (A0–A14, I/O0–I/O7, CE/OE/WE, VCC/GND), and voltage/timing compatibility allows direct substitution-though ISB2 drops from ~250 µA to 5 µA, enabling new low-power use cases without hardware modification.
Is there a lead-free version of CY62256LL-70PC available?
Yes. Cypress explicitly lists "Lead-free packages" as available for CY62256LL variants in the Features section of the datasheet (page 1), and the -70PC suffix denotes the lead-free narrow SOIC-28 variant compliant with JEDEC J-STD-020 moisture sensitivity level 3.
CY62256LL-70PC 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
CY62256LL-70PC FAQ
1.How can I place an order for CY62256LL-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY62256LL-70PC 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 CY62256LL-70PC reliable?
The price and inventory of CY62256LL-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY62256LL-70PC is usually 5 days.
3.What payment methods are accepted for CY62256LL-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY62256LL-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY62256LL-70PC?
CY62256LL-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY62256LL-70PC 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 CY62256LL-70PC?
For technical support, including CY62256LL-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY62256LL-70PC requirements.
6.How does Aetrix verify that CY62256LL-70PC is sourced from the original manufacturer or authorized distributors?
All CY62256LL-70PC 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 CY62256LL-70PC meets industry standards.
7.What is the process for return or replacement of CY62256LL-70PC?
All CY62256LL-70PC units undergo pre-shipment inspection (PSI). If there is an issue with CY62256LL-70PC, 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 CY62256LL-70PC part is unused and in its original packaging.
Return procedure for CY62256LL-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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