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Infineon Technologies CY14E256L-SZ35XI
- Part No.:
- CY14E256L-SZ35XI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY14E256L-SZ35XI.pdf
- Description:
- IC NVSRAM 256KBIT PAR 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,434
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Product details
Overview
CY14E256L-SZ35XI from Cypress Semiconductor is a 256 Kbit (32K × 8) nonvolatile SRAM with QuantumTrap technology, operating at 35 ns access time on single 5V ±10% supply, housed in a 32-pin SOIC package, and designed for systems requiring persistent memory retention without battery backup-e.g., industrial PLCs maintaining configuration during power loss.
For engineers reviewing the CY14E256L-SZ35XI datasheet, CY14E256L-SZ35XI pinout, CY14E256L-SZ35XI application, or CY14E256L-SZ35XI equivalent, key selection criteria include AutoStore timing (10 ms), VCAP capacitor requirement (68 µF), HSB-controlled hardware STORE, software STORE/RECALL address sequences, and compatibility with STK14C88 pinout.
Technical Context
The CY14E256L integrates parallel SRAM and QuantumTrap nonvolatile cells per bit, enabling simultaneous STORE/RECALL across all 32,768 bytes. It supports three STORE initiation methods: automatic on VCC drop below VSWITCH (~3.6 V), hardware via HSB pin assertion, and software via six-address CE-controlled READ sequence.
RECALL occurs automatically on power-up when VCC exceeds VSWITCH, or via identical six-address software sequence (final address 0x0C63). During STORE/RECALL, SRAM read/write is inhibited, and HSB pin asserts low to signal busy state-requiring external 10 kΩ pull-up to VCAP if used as indicator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 Kbit (32K × 8), directly replaceable for 32K-byte SRAM-based control buffers. |
| Access Time | 35 ns max, enabling direct interface with legacy 8-bit microcontrollers running ≤28 MHz bus clocks. |
| STORE Endurance | 1,000,000 cycles to QuantumTrap, limiting field-replaceable unit lifetime to ≥10 years at one daily STORE. |
| Data Retention | 100 years at +85°C, eliminating need for periodic refresh or backup power in sealed industrial enclosures. |
| VCAP Requirement | 68 µF ±20%, 6V-rated capacitor, providing minimum 10 ms STORE energy at VCC dropout to 3.6 V. |
| Operating Voltage | 5V ±10% (4.5–5.5 V), compatible with standard TTL/CMOS logic rails without LDO regulation. |
| Temperature Range | –40°C to +85°C, qualified for industrial automation environments with no derating. |
Pinout & Package
Package: 32-pin Small Outline Integrated Circuit (SOIC), RoHS-compliant, 0.300-inch body width, 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus supporting full 32K-byte addressing; stable before WE/CE assertion for write setup. |
| DQ0–DQ7 | Bidirectional Data I/O | 8-bit data bus shared for read output and write input; tri-stated when OE HIGH or during STORE/RECALL. |
| WE | Write Enable (Active LOW) | Controls write latching; must remain HIGH during STORE/RECALL to prevent bus contention. |
| CE | Chip Enable (Active LOW) | Enables device decoding; used to clock software STORE/RECALL sequences via CE-controlled reads. |
| OE | Output Enable (Active LOW) | Activates output drivers during read; kept HIGH during writes to avoid conflict on DQ lines. |
| HSB | Hardware Store Busy | Open-drain status pin: driven LOW during any STORE/RECALL; pulled LOW externally to initiate hardware STORE. |
| VCAP | AutoStore Capacitor Supply | Internal charge pump drives VCAP to 5 V; stores energy for STORE during VCC collapse-requires external 68 µF capacitor. |
| VCC / VSS | Power / Ground | Single 5V supply rail; VSS referenced to system ground plane-no separate analog/digital split required. |
Key Features
| Feature | Design Value |
|---|---|
| QuantumTrap Nonvolatile Cell | Embedded per-bit nonvolatile storage enabling 100-year data retention without wear leveling or ECC overhead. |
| Three-Mode STORE Initiation | Supports automatic (power-loss), hardware (HSB pin), and software (6-address sequence) STORE-enabling flexible system-level control. |
| Unlimited RECALL Cycles | Allows infinite restoration of last stored state after power-up, critical for deterministic boot behavior in safety-critical controllers. |
| WRITE-Gated AutoStore | AutoStore and HSB STORE are ignored unless at least one WRITE occurred since last STORE/RECALL-preventing unnecessary endurance wear. |
| HSB Busy Signaling | Open-drain HSB pin provides real-time hardware indication of STORE/RECALL progress, enabling system-level synchronization. |
Applications
| Industrial PLC Configuration Storage | Medical Device Parameter Backup |
|---|---|
Use Scenario: Storing ladder logic configuration and I/O mapping in programmable logic controllers during unexpected AC mains failure. IC Role / Device Role / Timing Role: Nonvolatile SRAM holding volatile runtime parameters; AutoStore triggered by VCC collapse within 10 ms. Use Value: Eliminates supercapacitor or battery backup subsystem, reducing BOM cost and field failure modes while guaranteeing <100 ms data persistence. | Use Scenario: Preserving calibration coefficients and patient treatment settings in portable infusion pumps between battery swaps. IC Role / Device Role / Timing Role: Primary nonvolatile parameter store; software RECALL executed at boot to restore calibrated operational state. Use Value: Enables zero-latency recall of FDA-required treatment parameters without EEPROM write delays or flash wear management. |
| Telecom Line Card State Preservation | Automotive ECU Boot Configuration |
Use Scenario: Maintaining port provisioning tables and alarm history in carrier-grade DSLAM line cards during hot-swap power interruptions. IC Role / Device Role / Timing Role: Dual-port accessible nvSRAM; HSB pin used to coordinate STORE with FPGA-controlled power sequencing. Use Value: Provides deterministic 10 ms STORE window synchronized to backplane power rail monitoring-avoiding packet loss during failover. | Use Scenario: Storing adaptive learning values (e.g., idle air control trim) in engine control units across ignition cycles. IC Role / Device Role / Timing Role: Automotive-grade nvSRAM; RECALL auto-triggered at VCC rise above VSWITCH during cranking. Use Value: Ensures immediate engine restart with learned parameters-no re-adaptation delay-meeting ISO 16750-2 cold-cranking voltage profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14C88-35I | Same 32K×8 pinout, 35 ns access, but uses NVSRAM with older SONOS technology; 100K STORE cycles, 10-year retention. | Limited to commercial temp range (0°C to +70°C); lacks HSB pin and software STORE sequence. | Select only for legacy board replacements where QuantumTrap reliability and industrial temp are not required. |
| FM24V02-G | F-RAM with 256 Kbit density, 40 MHz SPI interface, no STORE timing constraints, but serial interface adds latency vs. parallel bus. | Requires SPI controller integration; no AutoStore on power loss-requires host MCU to detect brownout and issue STORE command. | Choose when system already uses SPI peripherals and deterministic STORE timing is less critical than endurance (>10¹⁴ cycles). |
Compared with STK14C88-35I and FM24V02-G, CY14E256L-SZ35XI delivers superior data retention (100 years vs. 10 years), higher STORE endurance (1M vs. 100K cycles), industrial temperature support, and autonomous power-loss STORE-making it optimal for mission-critical embedded systems where firmware cannot intervene during power collapse.
Availability
CY14E256L-SZ35XI is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, telecom line cards, and automotive ECUs requiring stable component supply with guaranteed long-term availability and RoHS compliance.
Supply support for CY14E256L-SZ35XI 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 solutions for industrial, automotive, and communications markets.
The CY14E series targets applications needing battery-free nonvolatility-specifically replacing battery-backed SRAM in systems where maintenance access is restricted or environmental sealing precludes battery replacement.
FAQ
What capacitor value is required for reliable AutoStore operation?
A 68 µF ±20%, 6V-rated tantalum or low-ESR electrolytic capacitor must be connected between VCAP and ground. This ensures ≥10 ms STORE duration when VCC drops from 5 V to 3.6 V. Using <60 µF risks incomplete STORE; >220 µF extends recharge time and may delay subsequent STORE readiness.
Can CY14E256L-SZ35XI be used without the HSB pin connected?
Yes-HSB is optional. If unused, leave it unconnected; its internal weak pull-up holds it HIGH. The pin is only required when synchronizing external logic to STORE/RECALL progress or initiating hardware STORE. All other functions (AutoStore, software STORE/RECALL) operate independently of HSB.
How does the CY14E256L prevent STORE corruption during brownout conditions?
It monitors VCC internally and inhibits STORE initiation when VCC falls below VSWITCH (~3.6 V). Additionally, AutoStore and HSB STORE are gated to require at least one prior WRITE since last STORE/RECALL-ensuring only modified data is preserved and preventing spurious STOREs during unstable power transitions.
Is the CY14E256L-SZ35XI pin-compatible with standard 32K×8 SRAMs?
Yes-it matches industry-standard 32-pin SOIC pinout for 32K×8 parallel SRAMs (e.g., AS6C8008, IS61LV256AL), including identical A0–A14, DQ0–DQ7, CE, OE, WE, VCC, and VSS locations. No PCB redesign is needed for drop-in replacement where nonvolatility is added.
CY14E256L-SZ35XI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 32-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 35ns
- Access Time:
- 35 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOIC
CY14E256L-SZ35XI FAQ
1.How can I place an order for CY14E256L-SZ35XI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14E256L-SZ35XI 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 CY14E256L-SZ35XI reliable?
The price and inventory of CY14E256L-SZ35XI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14E256L-SZ35XI is usually 5 days.
3.What payment methods are accepted for CY14E256L-SZ35XI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14E256L-SZ35XI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14E256L-SZ35XI?
CY14E256L-SZ35XI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14E256L-SZ35XI 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 CY14E256L-SZ35XI?
For technical support, including CY14E256L-SZ35XI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14E256L-SZ35XI requirements.
6.How does Aetrix verify that CY14E256L-SZ35XI is sourced from the original manufacturer or authorized distributors?
All CY14E256L-SZ35XI 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 CY14E256L-SZ35XI meets industry standards.
7.What is the process for return or replacement of CY14E256L-SZ35XI?
All CY14E256L-SZ35XI units undergo pre-shipment inspection (PSI). If there is an issue with CY14E256L-SZ35XI, 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 CY14E256L-SZ35XI part is unused and in its original packaging.
Return procedure for CY14E256L-SZ35XI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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