CY14B101KA-SP45XI - 1Mbit nvSRAM 45ns with RTC | Infineon
MPN: CY14B101KA-SP45XI β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $23.99 | $23.99 |
| 10 | $22.79 | $227.90 |
| 100 | $21.11 | $2,111.00 |
| 500 | $19.19 | $9,595.00 |
| 1,000 | $17.27 | $17,270.00 |
CY14B101KA-SP45XI Overview
An nvSRAM (nonvolatile static RAM) is a memory device that combines the fast, unlimited read/write endurance of conventional SRAM with the nonvolatility of EEPROM or Flash. In the memory hierarchy, it sits above standard SRAM (which loses data at power-off) and below battery-backed SRAM solutions (which require cells and maintenance), making it part of the broader nonvolatile semiconductor memory family alongside FRAM, MRAM, and Flash.
Key features include QuantumTrap nonvolatile element technology, which Infineon describes as producing the world's most reliable nonvolatile memory; infinite SRAM read and write cycles; independent nonvolatile storage that resides in quantum trap cells; and an integrated real-time clock in the same monolithic IC, eliminating a separate RTC chip and its battery-backup circuitry in many designs.
Technically, the device operates as standard asynchronous SRAM until a store operation transfers SRAM contents into the nonvolatile elements, either automatically (on power loss) or under software/hardware control. A recall operation restores data from the nonvolatile elements back to SRAM at power-up. The 45 ns access time supports zero-wait-state operation with many microprocessors and FPGAs on a parallel address/data bus.
Typical applications include industrial data loggers, PLCs and factory automation equipment, metering systems requiring event and time stamping via the RTC, and networking or telecom equipment storing configuration and event data that must survive abrupt power failures.
Design consideration: budget the nonvolatile store cycle time (tSTORE) into your system timing, since the device is busy during a store operation, and ensure the power supply supervisor triggers auto-store before VDD falls below the minimum level.
This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet, with all specifications traceable to the Infineon/Cypress datasheet and distributor listings as of 2026-09-13.
Drop-in alternatives for CY14B101KA-SP45XI β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
CY14B101KA-SP25XI
β Drop-Inπ Reference alternative (not in catalog)
CY14B101KA-SP45XI Specifications
| Memory Type | nvSRAM (Non-Volatile SRAM) with Real-Time Clock |
| Memory Organization | 128K x 8 |
| Memory Density | 1 Mbit (1049 kbits) |
| Access Time | 45 ns |
| Supply Voltage | 3 V |
| Interface | Parallel |
| SRAM Read/Write Endurance | Unlimited (infinite) |
| Nonvolatile Technology | QuantumTrap |
| Integrated RTC | Yes (full-featured real-time clock) |
| Temperature Grade | Industrial (-40C to +85C) |
| Package | 48-SSOP (0.300 inch, MO-119) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
CY14B101KA-SP45XI 48-ssop (0.300 inch, mo-119) Pin Configuration Guide
Pin configuration for CY14B101KA-SP45XI (48-ssop (0.300 inch, mo-119) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for CY14B101KA-SP45XI.
Refer to the datasheet for full pin configuration.
Typical Applications
CY14B101KA-SP45XI is suitable for 6 applications: Industrial Data Logging, PLC and Factory Automation, Utility Metering and Smart Grid, Networking and Telecom Equipment, Medical Device Configuration Storage, Test and Measurement Instrumentation.
Industrial Data Logging
The CY14B101KA-SP45XI fits industrial data loggers because its SRAM core accepts unlimited high-frequency write bursts while the QuantumTrap elements commit the log automatically on power loss - something EEPROM and Flash cannot do without wear-leveling overhead. The 45 ns access time supports zero-wait-state writes from microcontrollers, and the industrial -40C to +85C grade covers unconditioned factory environments. The 128K x 8 array stores tens of thousands of log records between downloads. Designers should place the auto-store capacitor per the datasheet and trigger software stores during planned shutdowns for maximum data safety.
Recommended
PLC and Factory Automation
Programmable logic controllers need retention of ladder programs, retentive data registers, and fault histories across power cycles. The CY14B101KA-SP45XI serves as a single-chip substitute for battery-backed SRAM modules: 1 Mbit of 45 ns SRAM with automatic nonvolatile backup and no battery to service. The integrated RTC timestamps faults and shift data without a separate clock chip. Its 3V operation matches modern 3.3V logic buses directly. Because SRAM endurance is unlimited, the retentive register file can be rewritten every scan cycle for the life of the equipment without degradation.
Recommended
Utility Metering and Smart Grid
Electricity and water meters must preserve billing registers, load profiles, and tamper events through outages and battery removal. The CY14B101KA-SP45XI combines 1 Mbit of nonvolatile storage with a full-featured real-time clock in one monolithic IC, directly addressing time-of-use tariff recording. The auto-store function writes SRAM contents to QuantumTrap elements on power fail, ensuring register integrity during brownouts. The industrial temperature range suits outdoor meter enclosures. Designers should budget the store cycle into the power-fail sequence, triggering store when the supply supervisor asserts before VDD collapses.
Recommended
Networking and Telecom Equipment
Routers, switches, and line cards store configuration, MAC/address tables, and event logs that must survive both graceful reboots and power interruptions. The 45 ns parallel interface of the CY14B101KA-SP45XI attaches directly to CPU local buses without wait states, and unlimited write endurance supports frequent table updates that would exhaust Flash or EEPROM. The RTC provides log timestamps for diagnostics. At 3V supply it integrates cleanly into 3.3V backplane designs. For high-speed 25 ns bus systems, the CY14B101KA-SP25XI variant offers the same footprint with faster timing.
Recommended
Medical Device Configuration Storage
Infusion pumps, patient monitors, and diagnostic instruments require calibration constants, user settings, and audit trails that persist across power cycles and must never be lost mid-write. The CY14B101KA-SP45XI provides SRAM-speed configuration updates with automatic nonvolatile commit, eliminating battery-backed SRAM maintenance in medical service schedules. The integrated RTC supports audit timestamps required by device logs. The industrial temperature grade comfortably covers clinical environments. Verify the store/recall timing against the device power-fail sequence during design verification, and log store events as part of the audit record.
Recommended
Test and Measurement Instrumentation
Bench instruments and data acquisition systems store instrument state, calibration data, and captured waveforms between sessions. The CY14B101KA-SP45XI offers 45 ns access for fast parameter storage during measurement bursts and unlimited endurance for frequent state saves, while the RTC timestamps calibration events for traceability. QuantumTrap auto-store protects the last measurement context if mains power fails. The 48-SSOP footprint integrates into compact main boards without battery holders. For designs referencing this device, XAIPART also stocks FPGA and CPLD families suitable for the acquisition front ends.
Recommended
Recommended Products Summary
Engineering reference data for CY14B101KA-SP45XI β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY14B101KA-SP25XI |
|---|---|---|
| Package | 48-SSOP (0.300 in, MO-119) | 48-SSOP (0.300 in, MO-119) - same |
| Brand | Infineon (Cypress) | Infineon (Cypress) - same |
| Access Time | 45 ns | 25 ns |
| Memory Organization | 128K x 8 | 128K x 8 |
| Density | 1 Mbit | 1 Mbit |
| Supply Voltage | 3 V | 3 V |
| Real-Time Clock | Yes | Yes |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Nonvolatile Technology | QuantumTrap | QuantumTrap |
Key Differentiators
- Integrated real-time clock eliminates a separate RTC IC and its backup circuitry (vs CY14B101KA-SP25XI)
- Unlimited SRAM endurance with nonvolatile backup (vs EEPROM/Flash of similar density)
- 45 ns grade offers lower cost at relaxed timing (vs CY14B101KA-SP25XI)
Design Notes
Nonvolatile data integrity depends on detecting power failure early enough to complete the auto-store operation. Use a supply supervisor that asserts hardware STORE well before VDD reaches the minimum operating level specified in the datasheet, and size the reservoir capacitance on the 3V rail so the device can finish the tSTORE cycle during the brownout. For planned shutdowns, issue a software STORE command first; this is the most deterministic path and is recommended in the manufacturer datasheet as the primary protection mechanism.
The device is busy and will not respond to read or write cycles during a store or recall operation. Systems that poll memory immediately after power-up or immediately after triggering a software store will see erroneous bus behavior. Insert the datasheet-specified delay after power-up recall completes before the first access, and treat tSTORE as a blocking interval in your firmware. Also note that RTC registers are accessed through dedicated control sequences - do not assume standard SRAM addressing applies to them.
Keep the 45 ns parallel address/data bus traces short and length-matched where practical; at these speeds ringing and reflections are minor but stubs on address lines can still cause marginal timing at industrial temperature extremes. Decouple VDD with a 0.1 uF ceramic capacitor placed within a few millimeters of the package, plus bulk capacitance sized for the store-event current transient. Follow the land pattern for the 48-SSOP 0.300-inch (MO-119) body exactly to avoid solder bridging on the 1.27 mm pin pitch.
Compliance Information
Package described as RoHS compliant SOIC 0.300 inch (MO-119) in part databases. REACH, halogen-free, and conflict-minerals declarations should be obtained from Infineon's compliance portal.
