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PE4308
Product Specification
Figure 17. Serial Interface Timing Diagram
Table 7. 5-Bit Attenuator Serial Programming
Register Map
LE
B5
B4
B3
B2
B1
B0
Clock
C16
↑
C8
C4
C2
C1
0
↑
MSB (first in)
LSB (last in)
Data
MSB
LSB
Note: The stop bit (B0) must always be low to prevent the attenuator
t SDSUP
t SDHLD
t LESUP
t LEPW
from entering an unknown state.
Figure 18. Parallel Interface Timing Diagram
LE
Parallel Data
C16:C1
t PDSUP
t LEPW
t PDHLD
Table 8. Serial Interface AC Characteristics
V DD = 3.0 V, -40° C < T A < 85° C, unless otherwise specified
Table 9. Parallel Interface AC Characteristics
V DD = 3.0 V, -40° C < T A < 85° C, unless otherwise specified
Symbol
Parameter
Min
Max
Unit
Symbol
Parameter
Min
Max
Unit
f Clk
t ClkH
t ClkL
t LESUP
Serial data clock
frequency (Note 1)
Serial clock HIGH time
Serial clock LOW time
LE set-up time after last
clock falling edge
30
30
10
10
MHz
ns
ns
ns
t LEPW
t PDSUP
t PDHLD
LE minimum pulse width
Data set-up time before
rising edge of LE
Data hold time after
falling edge of LE
10
10
10
ns
ns
ns
t LEPW
t SDSUP
t SDHLD
LE minimum pulse width
Serial data set-up time
before clock rising edge
Serial data hold time
after clock falling edge
30
10
10
ns
ns
ns
Note:
f Clk is verified during the functional pattern test. Serial
programming sections of the functional pattern are clocked
at 10 MHz to verify f clk specification.
?2003-2006 Peregrine Semiconductor Corp. All rights reserved.
Document No. 70-0162-04 │ UltraCMOS? RFIC Solutions
Page 8 of 11
Logo updated under non-rev change. Peregrine products are protected under one or more of the following U.S. Patents: http://patents.psemi.com
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