參數(shù)資料
型號(hào): PCT1789N
英文描述: PCT303DL
中文描述: PCT303DL
文件頁(yè)數(shù): 34/40頁(yè)
文件大?。?/td> 632K
代理商: PCT1789N
PC-TEL, Inc.
57
1789N0DOCDAT01A-0399
PCT1789N DATA SHEET
S
WITCHING
C
HARACTERISTICS
!
PRELIMINARY
PRELIMINARY
Serial Interface (DCE = 1, FSD = 0)
Given values are: V
A
= charge pump, V
D
= 3.0 V to 5.25 V; T
A
= 0 °C to 70 °C for K-grade, –40 °C to +85 °C for
B-grade; C
L
= 20 pF.
All timing is referenced to the 50% level of the waveform. Input test levels are: V
IH
= V
D
– 0.4V, V
IL
= 0.4V.
Table 25 Switching Characteristics—Serial Interface (DCE = 1, FSD = 0)
Figure 20 Serial Interface Timing Diagram (DCE = 1, FSD = 0)
Parameter
SCLK duty cycle
Symbol
t
dty
t
d1
t
d2
t
d3
t
d4
t
su
t
h
t
su2
t
h2
Min
Typ
50
Max
Unit
%
Delay time, SCLK
to FSYNC
Delay time, SCLK
to FSYNC
Delay time, SCLK
to SDO valid
Delay time, SCLK
to SDO Hi-Z
Setup time, SDO before SCLK
Hold time, SDO after SCLK
Setup time, SDI before SCLK
Hold time, SDI after SCLK
–10
20
ns
20
ns
–10
20
ns
20
ns
25
ns
20
ns
25
ns
20
ns
SCLK
FSYNC
(mode 1)
FSYNC
(mode 0)
SDO
SDI
D15
D14
D1
D0
D15
D14
D13
D0
t
su2
t
h2
t
su
t
h
t
d3
t
d4
t
d1
t
d2
t
d1
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