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Infineon Technologies STK16C88-WF45
- Part No.:
- STK16C88-WF45
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
STK16C88-WF45.pdf
- Description:
- IC NVSRAM 256KBIT PARALLEL 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,224
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Product details
Overview
STK16C88-WF45 from Cypress Semiconductor is a 256 Kbit (32K × 8) AutoStore+ nvSRAM with 45 ns access time, single 5V±10% supply, and integrated QuantumTrap nonvolatile storage. It performs automatic STORE on power loss and RECALL on power-up without batteries, delivering 100-year data retention and 1,000,000 STORE cycles. Used in industrial control loggers for real-time parameter backup.
For engineers reviewing the STK16C88-WF45 datasheet, STK16C88-WF45 pinout, STK16C88-WF45 application, or STK16C88-WF45 equivalent, key selection criteria include guaranteed STORE/RECALL timing under voltage droop, software-controlled nonvolatile operations via CE-address sequence, and compatibility with legacy battery-backed SRAM footprints.
Technical Context
The STK16C88-WF45 implements dual-mode nonvolatile operation: hardware-triggered STORE initiated when VCC falls below VSWITCH (<500 ns latency), and software-initiated STORE/RECALL via six precise CE-controlled READs to dedicated addresses (e.g., 0x0E38 → 0x0FC0). Its QuantumTrap cell architecture enables independent SRAM read/write endurance and nonvolatile retention.
It supports TTL/CMOS-compatible inputs, requires no external capacitor for basic AutoStore+, and enforces hardware protection-blocking WRITE and STORE when VCAP < VSWITCH. Standby current is 30 mA (commercial) at tRC = 25 ns, with active ICC1 of 70 mA at 45 ns cycle time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 256 Kbit (32K × 8) - supports full byte-wide data logging buffers without address multiplexing |
| Access Time | 45 ns - meets timing margin for 20 MHz bus interfaces with setup/hold compliance |
| Data Retention | 100 years - eliminates field replacement due to data decay in unattended systems |
| STORE Cycles | 1,000,000 - supports daily power-cycling over 27 years without wear-out |
| Supply Voltage | 4.5 V to 5.5 V - interoperable with standard 5V logic rails and tolerates brownout conditions |
| Operating Temp | –40°C to +85°C - qualified for industrial ambient without derating |
| Package | 28-pin PDIP (600 mil) - direct drop-in replacement for DS1230AB modules |
Pinout & Package
28-pin Plastic Dual In-line Package (PDIP), 600 mil width, through-hole mounting. RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus for full 32K-byte addressing; no multiplexing required |
| DQ0–DQ7 | Bidirectional Data I/O | True 8-bit parallel interface; tristates when OE HIGH or during STORE/RECALL |
| WE | Write Enable (Active LOW) | Controls write gating; must remain HIGH during software STORE/RECALL sequences |
| CE | Chip Enable (Active LOW) | Primary chip select; used to clock all six address reads in software mode |
| OE | Output Enable (Active LOW) | Enables output drivers during reads; kept HIGH during writes to prevent bus contention |
| VCC | Power Supply | 5V ±10% input; powers SRAM core and QuantumTrap charge pump |
| VSS | Ground | System reference; requires local 0.1 µF bypass capacitor per high-speed CMOS practice |
Key Features
| Feature | Design Value |
|---|---|
| AutoStore+ Power-Loss Protection | Hardware-initiated STORE completes in <500 ns at VCC dropout - preserves last valid state without firmware intervention |
| Software-Controlled STORE/RECALL | 6-step CE-read sequence (e.g., 0x0E38 → 0x0FC0) enables deterministic nonvolatile updates during maintenance windows |
| Unlimited SRAM Endurance | True infinite read/write cycles - eliminates wear leveling logic in host controller firmware |
| Hardware Write/STORE Lockout | Automatic inhibition when VCAP < VSWITCH - prevents corruption during marginal power conditions |
| Direct Battery-Backed SRAM Replacement | Pins, timing, and command set match DS1230AB - zero PCB redesign for legacy upgrades |
Applications
| Industrial Data Logger | Medical Device Parameter Storage |
|---|---|
Use Scenario: Continuous acquisition of sensor readings with periodic power cycling or unexpected shutdowns. IC Role / Device Role / Timing Role: Nonvolatile scratchpad memory holding last valid calibration coefficients and fault logs. Use Value: Eliminates need for external battery and associated leakage/bulky footprint while guaranteeing 100-year retention of critical settings. | Use Scenario: Storing patient-specific therapy parameters and usage history in portable infusion pumps. IC Role / Device Role / Timing Role: Fail-safe configuration store that survives battery swaps and sterilization-induced power loss. Use Value: Meets IEC 62304 Class B software safety requirements by ensuring deterministic RECALL on every power-up. |
| Telecom Base Station Control | PLC Configuration Backup |
Use Scenario: Maintaining operational state (e.g., channel assignments, alarm thresholds) across scheduled reboots and grid outages. IC Role / Device Role / Timing Role: High-reliability shadow RAM synchronized with FPGA configuration registers. Use Value: Achieves sub-millisecond STORE latency without external supervision - critical for <100 ms service restoration SLAs. | Use Scenario: Preserving ladder logic runtime variables and I/O mapping during firmware updates or mains failure. IC Role / Device Role / Timing Role: Drop-in replacement for DS1230AB in legacy Allen-Bradley and Siemens PLC backplanes. Use Value: Enables RoHS-compliant upgrade path with identical 28-PDIP footprint and no timing or signal integrity changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nvSRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK16C88-WF25 | 25 ns access time; higher ICC1 (97 mA commercial); same pinout and STORE/RECALL protocol | Better suited for high-throughput data capture where <25 ns latency is mandatory | Select only if system timing budget requires faster access; otherwise WF45 offers lower power and cost |
| DS1230Y-120 | Battery-backed SRAM; requires external lithium coin cell; no software STORE/RECALL; 10-year retention | Legacy designs with existing battery holder and no firmware support for address-sequence commands | Choose only for repair-only scenarios; not recommended for new designs due to battery lifecycle and environmental restrictions |
Compared with STK16C88-WF25, the WF45 reduces active current by ~30% at equivalent bus speeds and simplifies thermal design; versus DS1230Y-120, it removes battery dependency, extends retention tenfold, and adds deterministic software control - at the cost of requiring minor firmware integration for sequence-based operations.
Availability
STK16C88-WF45 is available at Aetrix Electronics and suitable for industrial data loggers, medical device parameter storage, and PLC configuration backup requiring stable component supply and long-term lifecycle support.
Supply support for STK16C88-WF45 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 STK16C88 belongs to Cypress's AutoStore+ nvSRAM product line, engineered to replace battery-backed SRAM in mission-critical systems where data integrity during power interruption is non-negotiable.
FAQ
What triggers automatic STORE on the STK16C88-WF45?
Automatic STORE initiates when VCC drops below VSWITCH (typically ~3.0 V), detected internally within <500 ns. The device uses stored charge from its internal capacitor to complete the STORE before power collapse. No external signal or firmware action is required - it is fully hardware-transparent.
Can STK16C88-WF45 be used without modifying existing DS1230AB firmware?
Yes - for basic power-loss data preservation, STK16C88-WF45 operates identically to DS1230AB in hardware STORE/RECALL mode. Firmware changes are only needed to leverage software-initiated STORE/RECALL or to disable unused battery-monitoring routines.
Is an external capacitor required for reliable AutoStore+ operation?
No external capacitor is required for standard AutoStore+ operation. The device integrates a sufficient charge-storage capacitor. However, if VCC drops faster than 20 μs/volt, a 2.2 Ω resistor between VCC and system supply is recommended to limit inrush current into the internal capacitor.
How does hardware protection prevent unintended STORE during brownout?
When VCAP voltage falls below VSWITCH, the STK16C88-WF45 disables all externally initiated STORE operations and SRAM WRITEs. This lockout ensures no partial or corrupted STORE occurs during unstable supply conditions - preserving data integrity without host intervention.
STK16C88-WF45 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 28-DIP (0.600", 15.24mm)
- 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:
- 45ns
- Access Time:
- 45 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
STK16C88-WF45 FAQ
1.How can I place an order for STK16C88-WF45 through Aetrix?
Please submit a Request for Quotation (RFQ) for STK16C88-WF45 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 STK16C88-WF45 reliable?
The price and inventory of STK16C88-WF45 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STK16C88-WF45 is usually 5 days.
3.What payment methods are accepted for STK16C88-WF45?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STK16C88-WF45 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STK16C88-WF45?
STK16C88-WF45 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STK16C88-WF45 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 STK16C88-WF45?
For technical support, including STK16C88-WF45 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STK16C88-WF45 requirements.
6.How does Aetrix verify that STK16C88-WF45 is sourced from the original manufacturer or authorized distributors?
All STK16C88-WF45 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 STK16C88-WF45 meets industry standards.
7.What is the process for return or replacement of STK16C88-WF45?
All STK16C88-WF45 units undergo pre-shipment inspection (PSI). If there is an issue with STK16C88-WF45, 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 STK16C88-WF45 part is unused and in its original packaging.
Return procedure for STK16C88-WF45:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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