| Memory | Program | 2K words | |
| Data | 136 bytes RAM | ||
| Interrupts | Internal | Clock or Counter | 1 |
| Response time | 60ns | ||
| External | Port Pins | 8 | |
| Response time | 100ns | ||
| IO | Pins | SX 18 / 20 | 12 |
| SX 28 | 20 | ||
| Strength | 30mA Sink/Source | ||
| Analog Comparators | 1 | ||
| Counters | 1 (8 bit) | ||
| Operating Voltage | 2.7-5.5V (at 50Mhz) | ||
| Brown out detect | 2.2/2.6/4.2V | ||
As of 2002/02/05 the SX 18 has been discontinued. The SSOP package of the SX20 is still available. The smallest DIP package is the SX28.
50mips (20ns instruction cycle)
75mips (13.33 ns instruction cycle)
Summary of differences between SX 18/20/28 and SX 48/52
SX18/20/28AC and SX18/20/28AC75 Addressing Modes and FSR Register
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