K4S510432D-UC75 - 512Mb SDRAM 133MHz 54-TSOP II | Samsung
MPN: K4S510432D-UC75 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.34 | $934.00 |
| 500 | $8.6 | $4,300.00 |
| 1,000 | $7.9 | $7,900.00 |
Drop-in alternatives for K4S510432D-UC75 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:
K4S510432D-UC750
β Drop-Inπ Reference alternative (not in catalog)
K4S510432D-UC60
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
K4S510432D-UC75T00
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$3.2 / Unit
View Datasheet βK4S510432D-UC75T00
β Drop-Inβ In Stock
$3.2 / Unit
View Datasheet βK4S510432D-UC75 Maximum Ratings & Electrical Characteristics
| Memory Type | SDRAM (Synchronous DRAM) |
| Memory Size | 512 Mbit |
| Organization | 128M x 4 |
| Clock Frequency | 133 MHz |
| Access Time | 65 ns |
| Interface Type | LVTTL |
| Supply Voltage Min | 3.0 V |
| Supply Voltage Max | 3.6 V |
| Technology | CMOS, D-die |
| CAS Latency | 2 or 3 |
| Burst Length | 1, 2, 4, 8, full page |
| Refresh | Auto-refresh and self-refresh |
| Package | 54-TSOP II (PDSO54, 0.80 mm pitch) |
| Package Dimensions | 0.400 x 0.875 inch (10.2 x 22.2 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | Commercial temperature range |
| RoHS Status | RoHS compliant |
| Number of Terminals | 54 |
K4S510432D-UC75 Pin Configuration
| Pin 1 | VDD β Core power supply (3.0V to 3.6V) |
| Pin 2 | DQ0 β Data input/output bit 0 |
| Pin 3 | VDDQ β I/O power supply |
| Pin 4 | DQ1 β Data input/output bit 1 |
| Pin 5 | NC β Not connected (per datasheet) |
| Pin 6 | VDDQ β I/O power supply |
| Pin 7 | NC β Not connected (per datasheet) |
| Pin 8 | VDDQ β I/O power supply |
| Pin 9 | NC β Not connected (per datasheet) |
| Pin 10 | VDDQ β I/O power supply |
| Pin 11 | NC β Not connected (per datasheet) |
| Pin 12 | VSSQ β I/O ground |
| Pin 13 | NC β Not connected (per datasheet) |
| Pin 14 | VSSQ β I/O ground |
| Pin 15 | NC β Not connected (per datasheet) |
| Pin 16 | VSSQ β I/O ground |
| Pin 17 | NC β Not connected (per datasheet) |
| Pin 18 | VSSQ β I/O ground |
| Pin 19 | NC β Not connected (per datasheet) |
| Pin 20 | VSS β Core ground |
| Pin 21 | DQ2 β Data input/output bit 2 |
| Pin 22 | DQM β Data input/output mask |
| Pin 23 | WE β Write enable |
| Pin 24 | CAS β Column address strobe |
| Pin 25 | RAS β Row address strobe |
| Pin 26 | CS β Chip select |
| Pin 27 | BA0 β Bank address select 0 |
| Pin 28 | BA1 β Bank address select 1 |
| Pin 29 | A12 β Address input (row/column) |
| Pin 30 | A11 β Address input |
| Pin 31 | A9 β Address input |
| Pin 32 | A8 β Address input |
| Pin 33 | A7 β Address input |
| Pin 34 | A6 β Address input |
| Pin 35 | A5 β Address input |
| Pin 36 | A4 β Address input |
| Pin 37 | A3 β Address input |
| Pin 38 | A2 β Address input |
| Pin 39 | A1 β Address input |
| Pin 40 | A0 β Address input |
| Pin 41 | VDD β Core power supply |
| Pin 42 | VSS β Core ground |
| Pin 43 | CKE β Clock enable |
| Pin 44 | CLK β System clock input |
| Pin 45 | NC β Not connected (per datasheet) |
| Pin 46 | NC β Not connected (per datasheet) |
| Pin 47 | DQ3 β Data input/output bit 3 |
| Pin 48 | VSSQ β I/O ground |
| Pin 49 | NC β Not connected (per datasheet) |
| Pin 50 | VDDQ β I/O power supply |
| Pin 51 | NC β Not connected (per datasheet) |
| Pin 52 | VSSQ β I/O ground |
| Pin 53 | VDDQ β I/O power supply |
| Pin 54 | VSS β Core ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
K4S510432D-UC75 is suitable for 6 applications: Legacy Industrial Main Memory, FPGA-Based Processing Systems, Telecom and Networking Line Cards, Set-Top Box and Consumer Multimedia, Test and Measurement Instrumentation, Aerospace and Defense Legacy Sustainment.
Legacy Industrial Main Memory
Industrial controllers, PLCs, and motion-control systems built in the PC133 era rely on 3.3V LVTTL SDRAM as main working memory. The K4S510432D-UC75 fits these designs directly: its 512Mbit capacity in 128M x 4 organization matches the 32-bit-wide buses formed by four x4 devices, and its 133 MHz rating with 65 ns access time comfortably supports the 100-133 MHz memory clocks common on PowerPC and ARM-class industrial SoCs. Because it is fully synchronous with CAS latency 2/3 programmability, existing SDRAM controllers need no firmware changes. RoHS compliance allows continued use in EU-market industrial equipment, and the commercial temperature range covers standard factory floor environments.
Recommended
FPGA-Based Processing Systems
The K4S510432D-UC75 serves as external working memory in FPGA systems, particularly with 3.3V LVTTL I/O families such as Microsemi ProASIC3 (A3P600) and RTAX radiation-tolerant devices whose banks natively drive 3.3V memory signaling. Its 133 MHz clock rate aligns with standard SDRAM controller IP offering CL2/CL3 latency, burst lengths of 1/2/4/8, and full-page modes for video or packet buffering. Because the x4 organization allows width expansion to x32/x64 with minimal fanout per data line, signal integrity at 133 MHz remains manageable on two-layer to four-layer boards. Designers must implement the mandatory initialization sequence: 100 us delay, precharge-all, eight auto-refresh cycles, then mode register set.
Recommended
Telecom and Networking Line Cards
Telecom line cards, E1/T1 framers, and legacy network processing platforms historically used banks of x4 SDRAM for deep packet buffering and statistics counters, where the narrow x4 organization enabled very wide ECC-protected buses. The K4S510432D-UC75 provides 512Mbit per device with LVTTL compatibility to the 3.3V backplane domain, 133 MHz operation for sustained buffering throughput, and full-page burst mode suited to sequential FIFO-like traffic. Four devices in x32 configuration deliver 2Gbit of buffered storage with auto-refresh handled transparently by the controller. Self-refresh mode permits line-card standby states without data loss, valuable in redundant carrier-grade architectures requiring hot-standby memory retention.
Recommended
Set-Top Box and Consumer Multimedia
Digital set-top boxes and consumer multimedia decoders of the early-2000s generation used 3.3V SDRAM for MPEG-2 video frame buffering. The K4S510432D-UC75 suits this role with 512Mbit density per device, 133 MHz clock for the ~800 MB/s aggregate bandwidth of a 64-bit bus, and CAS latency 3 timing at the video-refresh clock rates. Its LVTTL interface connects directly to the 3.3V memory controller in SoCs of that era, and its commercial temperature rating covers typical consumer operating environments. Full-page burst mode maximizes efficiency in the predominantly sequential access pattern of video frame buffers, and auto-refresh maintains picture data during decoder idle periods.
Recommended
Test and Measurement Instrumentation
Oscilloscope, logic analyzer, and data-acquisition platforms require deep sample memory; legacy instruments based on 3.3V SDRAM controllers use parts like the K4S510432D-UC75 for acquisition buffers. The 65 ns access time and CL2/CL3 programmability let designers tune latency versus throughput for streaming capture, while 1/2/4/8/full-page burst modes support both scattered-channel reads and high-speed sequential streaming. Four devices in x32 plus ECC-wide configurations give the error coverage needed for measurement credibility. The D-die CMOS process keeps standby power low for battery-powered portable instruments, and self-refresh preserves buffered waveforms through processor sleep states between analysis passes.
Recommended
Aerospace and Defense Legacy Sustainment
Aerospace and defense programs with 15-25 year lifecycles face recurring shortages of PC133-era SDRAM for avionics buffers, radar pre-processing memory, and ground-support equipment. The K4S510432D-UC75 sustains these designs with a pin-compatible Samsung family (UC60/UC75/UC750 grades) enabling supply-chain hedging through multiple qualified speed grades on the same footprint. Its fully static-friendly synchronous interface requires no redesign when substituting within the family, and RoHS compliance simplifies logistics for refurbished hardware. Radiation-tolerant system builders frequently pair commercial SDRAM with watchdog refresh schemes; the part's defined auto-refresh timing (4096 cycles per 64 ms) supports deterministic refresh scheduling in fault-tolerant memory managers.
Recommended
Recommended Products Summary
Engineering reference data for K4S510432D-UC75 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | K4S510432D-UC750 | K4S510432D-UC60 | K4S510432D-UC7 | K4S510432D-UC75T00 |
|---|---|---|---|---|---|
| Package | 54-TSOP II | 54-TSOP II - same | 54-TSOP II - same | 54-TSOP II - same | 54-TSOP II - same |
| Brand | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics |
| Memory Size | 512 Mbit | 512 Mbit | 512 Mbit | 512 Mbit | 512 Mbit |
| Organization | 128M x 4 | 128M x 4 | 128M x 4 | 128M x 4 | 128M x 4 |
| Clock Frequency | 133 MHz | 133 MHz class | 100 MHz class | 133 MHz class | 133 MHz |
| Access Time | 65 ns | 65 ns class | [DATA_NEEDED] | 65 ns class | 65 ns |
| Supply Voltage | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Interface | LVTTL | LVTTL | LVTTL | LVTTL | LVTTL |
| RoHS | Compliant | Compliant | [DATA_NEEDED] | Compliant | Compliant |
Key Differentiators
- Highest speed grade within the K4S510432D family (vs K4S510432D-UC60)
- Tape-and-reel availability for volume production (vs K4S510432D-UC75T00)
- RoHS compliant D-die process (vs K4S510432D-UC750)
Design Notes
For 133 MHz SDRAM bus routing, keep CLK trace short and route all address/control signals as a matched group with controlled skew relative to clock (target < 500 ps skew for the D-die setup/hold budget). Use a solid ground plane under the memory bus, series-terminate address/control lines (22-33 ohm) and parallel-terminate data lines per controller driver strength. Decouple each VDD/VDDQ pin pair with 0.1 uF ceramic plus bulk 10 uF per device. Samsung application notes for D-die SDRAM provide reference AC timing parameters for CL3 at 133 MHz.
Power the device from a clean 3.3V rail (3.0-3.6V absolute window). Estimated: at typical operating current levels for 512Mb SDRAM of this class, four devices on a 64-bit bus draw on the order of a few hundred milliamps active; budget rail capacity accordingly and sequence power so VDD and VDDQ ramp together. CKE should be held low during power ramp to keep outputs tri-stated and prevent bus contention with the memory controller during controller initialization.
The most common bring-up failure is omitting or mis-ordering the initialization sequence: the controller must wait 100 us after stable power, issue PRECHARGE ALL, perform 8 AUTO REFRESH cycles, then set the mode register (CAS latency, burst length, burst type, write burst mode) before any access. A second frequent error is missing the 15.6 us refresh deadline (4096 cycles per 64 ms), producing intermittent bit errors instead of hard failure. Verify the speed-grade suffix on delivered parts: a UC60 cannot be assumed to close timing at 133 MHz.
Compliance Information
RoHS compliant per distributor datasheet record (ROHS COMPLIANT, TSOP2-54). REACH, lead-free plating, halogen-free, and conflict-minerals statuses were not specified in the retrieved data - consult Samsung official product compliance declarations.
