Intel Mobile Pentium II microprocessor family

Intel Mobile Pentium II is a family of high-performance microprocessors based on P6 microarchitecture. The first two mobile Pentium IIs, clocked at 233 and 266 MHz, were introduced in April 1998. These processors were packaged in mini-cartridge assembly, and, like desktop counterparts, had 512 KB level 2 cache inside of the cartridge. The first two parts were followed by 300 MHz CPU in September, and shortly, in January 1999, all three models were superseded with improved version of the processor. The new microprocessors integrated level 2 cache on a chip, had higher clock speeds and slightly lower Thermal Design Power. Not only these CPUs were manufactured in mini-cartridge package, they were also produced in smaller micro-PGA and BGA packages.

All mobile Pentium II microprocessors were based on 0.25 micron P6 micro-architecture, with the exception of some 400 MHz processors, that were built on 0.18 micron technology. The CPUs included 32 KB L1 cache, and either 256KB on-chip or 512KB off-chip L2 cache. The Pentium IIs utilized 64-bit wide 66 MHz Front Side Bus, and incorporated Floating-Point Unit and MMX instructions. In addition to several low-power states, supported by desktop CPUs, the mobile parts also included Quick Start mode, which reduced power consumption to 0.5 Watt and had very low exit latency of 8 - 10 bus clocks. Other notable differences between the desktop and mobile Pentium II CPUs were the lack of multi-processing support on mobile parts, lower 1.5v - 1.6V core voltage, low-power GTL+ bus, addition of thermal sensor, and changes in implementation of low-power states. Thermal Design Power of mobile microprocessors ranged from about 8 Watt to 13 Watt, depending on clock frequency and L2 cache architecture. The CPUs were manufactured in micro-PGA and BGA packages. They were also shipped in mini-cartridge assembly type of package, and MMC-1/MMC-2 modules.