參數(shù)資料
型號(hào): PCT789T-A
英文描述: PCI HSP56 World MicroModem/PCT303DW/PCT1789W
中文描述: 世界MicroModem/PCT303DW/PCT1789W的PCI HSP56
文件頁(yè)數(shù): 55/70頁(yè)
文件大小: 872K
代理商: PCT789T-A
PC-TEL, Inc.
55
1789W0DOCDAT06A-0299
PCT1789W DATA SHEET
S
WITCHING
C
HARACTERISTICS
!
PRELIMINARY
PRELIMINARY
S
WITCHING
C
HARACTERISTICS
General Inputs
Given values are: V
A
= charge pump, V
D
= +3.3 V ± 5%; T
A
= 70 °C for K-grade, 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—General Inputs
Figure 16 General Inputs Timing Diagram
Parameter
Cycle time, MCLK
Symbol
t
mc
t
dty
t
r
t
f
t
mr
t
rl
t
mxr
Min
16.67
Typ
Max
Unit
ns
MCLK duty cycle
40
50
60
%
Rise time, MCLK
5
ns
Fall time, MCLK
5
ns
MCLK before RESET
10
cycles
RESET pulse width
a
a.
b.
The minimum RESET pulse width is the greater of 250ns or 10 MCLK cycle times.
M0 and M1 are typically connected to V
D
or GND and should not be changed during normal operation.
250
ns
M0, M1 before RESET
b
20
ns
MCLK
V
IH
V
IL
RESET
t
f
t
mc
t
mr
t
rl
t
r
M0, M1
t
mxr
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