Electrical Characteristics (V
CC =VDD = 2.8 V, TA = 25 C; unless otherwise noted.) (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
MICROWIRE INTERFACE TIMING
t
CS
Data to Clock Set Up Time
50
ns
t
CH
Data to Clock Hold Time
10
ns
t
CWH
Clock Pulse Width High
50
ns
t
CWL
Clock Pulse Width Low
50
ns
t
ES
Clock to Latch Enable Set Up Time
50
ns
t
EW
Latch Enable Pulse Width
50
ns
Note 4: In power down mode, set DATA, CLK and LE pins to 0 V (GND).
Note 5: The reference frequency must also be programmed using the OSC_FREQ control bit. For other reference frequencies, please contact National
Semiconductor.
Note 6: For other frequency ranges, please contact National Semiconductor.
Note 7: Lock time is defined as the time difference between the beginning of the frequency transition and the point at which the frequency remains within +/- 1 kHz
of the final frequency.
Note 8: Frequencies other that the default value can be programmed using Words R4 and R5. See Programming Description for details.
Serial Data Input Timing
20067204
LMX2522/LMX2532
www.national.com
6
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