IBM 386SLC
The IBM 386SLC was an Intel licensed version of the i386SX . IBM revised this and added power management and an 8 kB L1 cache. Thanks to the L1 cache, the 386SLC was faster than an i386DX with the same clock frequency, but it was significantly cheaper.
Place of use
The SLC, known internally as S uper L ittle C hip , was used in the IBM PS / 2 series 35, 40 and 56 and some IBM ThinkPads , but did not achieve a large market share . It was also offered as an upgrade CPU for the IBM PS / 2 Series 25.
Technical specifications
386SLC
- L1 cache : 8 KB (WT / unified)
- L2 cache: nonexistent
- Design: MQFP-100 (Metal Quad Flat Package)
- Operating voltage ( VCore ): 3.3V
- Release DATE: October 1991
- Manufacturing technology: 1.2 µm, CMOS
- Die size : 161 mm² with 815,000 transistors
- Clock rates:
- 16 MHz
- 20 MHz
- 25 MHz
IBM 486SLC (2)
The IBM 486SLC (2) is a version of the 386SLC expanded by the 486 instruction set based on Cyrix / Intel 386 cores and has an L1 cache that is 16 KB larger than the i486. This processor was used, for example, in the ThinkPad series.
- pin compatible with i386SX
- Data bus: 16 bit (internal 32 bit)
- Address bus: 24 bit
- L1 cache : 16 KB (WT / unified)
- L2 cache: nonexistent
- Design: PQFP with 100 pins
- Operating voltage ( VCore ): 3.3V
- Introduced:
- 486SLC:?
- 486SLC2: September 1992
- Manufacturing technology: 0.7 µm (486SLC2)
- Die size : 69 mm² with approx. 1.35 million transistors
- Multiplier: 2 (486SLC2)
- Clock rates:
- 16 MHz
- 20 MHz
- 25 MHz
- 32 MHz (486SLC2)
- 40 MHz (486SLC2)
- 50 MHz (486SLC2)
- 66 MHz (486SLC2)
- 80 MHz (486SLC2)
IBM 486DLC / DLC2 / BLX / BLX2 / BLX3 (Blue Lightning)
Like IBM 486SLC (2), but with 32-bit data bus, 32-bit address bus and clock tripling (BLX3). For example, the 486BLX2 was used in the ThinkPad 510Cs.
- Data bus: 32 bit
- Address bus: 32 bit
- L1 cache : 16 KB (unified)
- L2 cache: nonexistent
- Design: PQFP with 132 pins
- Operating voltage ( VCore ): 3.3V
- Introduced: 1993
- Manufacturing technology: 0.8 µm
- Die size : 82 mm² with approx. 1.4 million transistors
- Multiplier: 2 (486DLC2 / BLX2), 3 (486BLX3)
- Clock rates:
- 15 MHz (486BLX)
- 20 MHz (486BLX)
- 25 MHz (486BLX)
- 30 MHz (486BLX2)
- 33 MHz (486DLC / BLX)
- 40 MHz (486BLX2)
- 45 MHz (486BLX3)
- 50 MHz (486DLC2 / BLX2)
- 60 MHz (486BLX3)
- 66 MHz (486DLC2 / BLX2)
- 75 MHz (486BLX3)
- 100 MHz (486BLX3)