參數(shù)資料
型號: PCT1789N
英文描述: PCT303DL
中文描述: PCT303DL
文件頁數(shù): 33/40頁
文件大?。?/td> 632K
代理商: PCT1789N
PC-TEL, Inc.
56
1789N0DOCDAT01A-0399
PCT1789N DATA SHEET
S
WITCHING
C
HARACTERISTICS
!
PRELIMINARY
PRELIMINARY
Serial Interface (DCE = 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 24 Switching Characteristics—Serial Interface (DCE = 0)
Figure 19 Serial Interface Timing Diagram (DCE = 0)
Parameter
Cycle time, SCLK
Symbol
t
c
t
dty
t
d1
t
d2
t
d3
t
su
t
h
t
sfc
t
hfc
Min
354
Typ
Max
Unit
ns
1/256 Fs
SCLK duty cycle
50
%
Delay time, SCLK
to FSYNC
Delay time, SCLK
to SDO valid
Delay time, SCLK
to FSYNC
Setup time, SDI before SCLK
Hold time, SDI after SCLK
Setup time, FC
before SCLK
Hold time, FC
after SCLK
–10
20
ns
20
ns
–10
20
ns
25
ns
20
ns
40
ns
40
ns
SCLK
V
OH
V
OL
D15
D14
D1
D0
16-bit
SDO
D15
D14
D1
D0
16-bit
SDI
t
d2
t
su
t
h
FSYNC
(mode 1)
t
d3
t
c
t
hfc
t
sfc
FC
FSYNC
(mode 0)
t
d1
t
d3
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