74F401

Storage Temperature                     -65 to +150
Ambient Temperature under Bias   -55 to +125
Junction Temperature under Bias -55°C to +150

VCC Pin Potential to Ground Pin       -0.5V to +7.0V
Input Voltage (Note 5)                     -0.5V to +7.0V
Input Current (Note 5)               -30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with V_CC = 0V)
Standard Output                                 -0.5V to V_CC
3-STATE Output                                -0.5V to +5.5V
Current Applied to Output
in LOW State (Max) twice the rated I_OL (mA)

The 74F401 Cycle Redundancy Check (CRC) Generator/ Checker provides an advanced tool for implementing the most widely used error detection scheme in serial digital data handling systems. A 3-bit control input selects one-ofeight generator polynomials. The list of polynomials includes CRC-16 and CRC-CCITT as well as their reciprocals (reverse polynomials). Automatic right justification of the 74F401 is incorporated for polynomials of degree less than 16. Separate clear and preset inputs are provided for floppy disk and other applications. The Error output indicates whether or not a transmission error has occurred. Another control input inhibits feedback during check word transmission. The 74F401 is fully compatible with all TTL families.