K4S640432H/K4S640832H/K4S641632H is a 64Mb H-die CMOS SDRAM chip produced by Samsung Electronics.
This datasheet provides detailed information on Samsung's 64 Mb H‑die CMOS SDRAM devices, covering features, organization, package dimensions, pin configuration, and electrical characteristics. It includes ordering information for the K4S640432H, K4S640832H and K4S641632H part numbers.
Key sections describe absolute maximum ratings, recommended operating conditions, capacitance values, and timing parameters, enabling designers to integrate the memory correctly into high‑performance systems.
| Supply voltage (VDD, VDDQ) | 3.0 V min – 3.6 V max (typ 3.3 V) |
|---|---|
| Maximum operating frequency | 133 MHz (CL=3) for 16 Mb × 4 and 8 Mb × 8 parts |
| Package type | 54‑pin TSOP‑II |
| Storage temperature range | -55 °C to +150 °C |
| Power dissipation | 1 W |
| Absolute maximum pin voltage | -10 V to +46 V |
The device is specified for a supply voltage of 3.0 V minimum, 3.3 V typical, and 3.6 V maximum.
The SDRAM can be stored from –55 °C up to +150 °C.
The 16 Mb × 4 version (K4S640432H) operates up to 133 MHz with CL = 3.
It is supplied in a 54‑pin TSOP‑II surface‑mount package.