Symbol

Parameter

Conditions

Typ

Guaranteed

Units

Limit

Maximum Operating

MHz

Frequency of SCK

Maximum Propagation

pF

ns

Maximum Propagation

pF

ns

Maximum Output Enable

pF

ns

Maximum Output Disable

ns

Minimum Setup Time

ns

from SER to SCK

Minimum Setup Time

ns

from SCLR to SCK

Minimum Setup Time

ns

from SCK to RCK

See Note

Minimum Hold Time

ns

from SER to SCK

Minimum Pulse Width

ns

of SCK or RCK

Note 5

This setup time ensures the register will see stable data from the shift-register outputs The clocks may be

connected together in which case the storage register state will be one clock pulse behind the shift register

74HC

54HC

Symbol

Parameter

Conditions

Units

Typ

Guaranteed Limits

Maximum Operating

pF

V

MHz

Frequency

V

MHz

V

MHz

Maximum Propagation

pF

V

ns

pF

V

ns

pF

V

ns

pF

V

ns

pF

V

ns

pF

V

ns

Maximum Propagation

pF

V

ns

pF

V

ns

pF

V

ns

pF

V

ns

pF

V

ns

pF

V

ns

3