MIC50398 Datasheet, PDF (6/6 Pages) Micrel Semiconductor – Six Decade Counter / Display Decoder

MIC50398/50399
Dynamic Operating Conditions
Symbol
Parameter
Min
Max
Units
f_CI
f_SI
t_CPW
t_SPW
t_SS
t_CIS
t_UDS
t_CPW
t_CS
t_OA
t_OH
t_CA
t_CH
t_L
Count Input Frequency
Scan Input Frequency
Count Pulse Width
Store Pulse Width
Store Setup Time
Count Inhibit Setup Time
Up/Down setup Time
Clear Pulse Width
Clear Setup Time
Zero Access Time
Zero Hold Time
Carry Access Time
Carry Hold Time
Load Time
0
1.5
MHz
0
20
kHz
325
ns
2.0
µs
0
µs
0
µs
–0.75
µs
2.0
µs
–0.5
µs
3.0
µs
1.5
µs
1.5
µs
0.9
µs
1/6 f_SI
Note 7: Measured at 50% duty cycle.
Note 8: If carry or zero outputs are used, the count frequency will be limited by their respective output times.
Note 9: The count pulse width must be greater than the carry access time when using the carry output.
Note 10: The positive edge of the count input is the t = 0 reference.
Note 11: Measured from negative edge of count input.
Note 12: Time to load one digit.
Micrel
Notes
7,8
9
10
10
10
10
10
10 MIC50399 only
10 MIC50399 only
10
11
12
8
August 1998
8-15