This document describes the features and characteristics of Fairchild Semiconductor Corporation's VHC family of products, including speed, noise performance, output drive capability, AC performance specifications, static current, and input voltage range.
This document is a technical datasheet from August 1993 (revised December 1999) describing the Fairchild Semiconductor VHC and VHCT logic families. It highlights that these devices offer speeds up to 60% faster than HCMOS with guaranteed noise performance, making them suitable for applications requiring high speed without full FACT drive capabilities.
The text details DC and AC specifications, including output drive currents, propagation delays under various capacitive loads (15 pF and 50 pF), and power consumption. It also covers input/output overvoltage tolerance, allowing interfacing between different supply voltages (e.g., 3V to 5V systems) without external translators.
| Output Drive Current (+Vcc) | +8 mA at 5V |
|---|---|
| Operating Voltage Range (VHC) | 2.0V—5.5V |
| ESD Protection (HBM) | > +2 kV |
The VHC speeds are typically 60% faster than HCMOS.
AC performance specifications are provided at 15 pF and 50 pF loads.
Yes, inputs allow 0V to 7V applied regardless of supply voltage.