The RC4193 is most suited for single ended step-up (VOUT > VIN) circuits because the NPN internal switch tran sistor is referenced to ground. It is complemented by Fair- child Semiconductor's micropower switching regulator, the RC4391, which is dedicated to step-down (VOUT < VIN) and inverting VOUT = -VIN) applications. Between the two devices the ability to create all three basic switching regula- tor configurations is assured. Refer to the RC4391 data sheet for step-down and inverting applications.
| Read cycle time | tRC | 55 | 70 | ns |
| Address access time | tAA | 55 | 70 | ns |
| Chip select access time | tc0 | 55 | 70 | ns |
| Output enable to output valid | tOE | 25 | 35 | ns |
| Chip select to output in low-Z | tLZ | 10 | 10 | ns 2 |
| Output enable to output in low-Z | tOLZ | 5 | 5 | ns 2 |
| Chip deselect to output in high-Z | tHZ | 0 20 | 0 25 | ns l.2 |
| Output disable to output in high-Z | tOHZ | 0 20 | 0 25 | ns l.2 |
| Output hold from address change | tOH | 10 | 10 | ns |
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