Semiconductor & Computer Engineering
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i486SX-20 - Intel
Template:mpu i486SX-20 was a fourth-generation x86 microprocessor introduced by Intel in 1991. This chip, which is based on the 80486 microarchitecture, operated at 20 MHz. In contrast to the i486DX chips, the i486SX line had no functional FPU on-die.
Contents
Cache
- Main article: 80486 § Cache
| Cache Info [Edit Values] | ||
| L1$ | 8 KiB 8,192 B 0.00781 MiB |
1x8 KiB 4-way set associative (unified, write-through policy) |
Graphics
This chip had no integrated graphics processing unit.
Features
- System Management Mode (SMM)
See also
Facts about "i486SX-20 - Intel"
| base frequency | 20 MHz (0.02 GHz, 20,000 kHz) + |
| bus rate | 20 MT/s (0.02 GT/s, 20,000 kT/s) + |
| bus speed | 20 MHz (0.02 GHz, 20,000 kHz) + |
| bus type | FSB + |
| clock multiplier | 1 + |
| core count | 1 + |
| core name | 486SX + |
| core voltage | 5 V (50 dV, 500 cV, 5,000 mV) + |
| core voltage tolerance | 5% + |
| cpuid | 420 + |
| designer | Intel + |
| family | 80486 + |
| first launched | September 16, 1991 + |
| full page name | intel/80486/486sx-20 + |
| instance of | microprocessor + |
| l1$ description | 4-way set associative + |
| l1$ size | 8 KiB (8,192 B, 0.00781 MiB) + |
| ldate | September 16, 1991 + |
| manufacturer | Intel + |
| max cpu count | 1 + |
| max memory | 4,096 MiB (4,194,304 KiB, 4,294,967,296 B, 4 GiB, 0.00391 TiB) + |
| max operating temperature | 85 °C + |
| microarchitecture | 80486 + |
| min operating temperature | 0 °C + |
| model number | i486SX-20 + |
| name | Intel i486SX-20 + |
| part number | A80486SX-20 +, KU80486SX-20 + and 03G9565 + |
| power dissipation | 2.25 W (2,250 mW, 0.00302 hp, 0.00225 kW) + |
| process | 1,000 nm (1 μm, 0.001 mm) + and 800 nm (0.8 μm, 8.0e-4 mm) + |
| s-spec | SX406 +, SX467 +, SX492 +, SX678 +, SXE63 +, SX587 +, SX632 +, SX672 +, SZ700 + and SZ740 + |
| series | 486SX + |
| smp max ways | 1 + |
| technology | CMOS + |
| transistor count | 1,185,000 + |
| word size | 32 bit (4 octets, 8 nibbles) + |