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FT120T-R 数据表(PDF) 27 Page - Future Technology Devices International Ltd.

部件名 FT120T-R
功能描述  USB Device Controller with Parallel Bus IC
PDF  40 Pages
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制造商  FTDI [Future Technology Devices International Ltd.]
网页  http://www.ftdichip.com
标志 FTDI - Future Technology Devices International Ltd.

FT120T-R 数据表(HTML) 27 Page - Future Technology Devices International Ltd.

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Copyright © 2014 Future Technology Devices International Limited
27
Document No.: FT_000646
FT120 USB DEVICE CONTROLLER WITH PARALLEL BUS IC
Datasheet Version 1.2
Clearance No.: FTDI#
291
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
UVDif
Differential Input
Sensitivity
0.2
V
UDrvZ
Driver Output
Impedance
29
-
44
Ω
Including external
22 Ω ±1% series
resistor
Table 8-4 USB I/O Pin (USBDP, USBDM) Characteristics
8.3 AC Characteristics
Parameter
Value
Unit
Minimum
Typical
Maximum
Frequency of Operation
(see Note 1)
5.997
6.000
6.003
MHz
Duty Cycle
45
50
55
%
Table 8-5 Crystal or clock Characteristics (OSCI, OSCO pins)
Note 1: Equivalent to ±500ppm
Symbol
Parameter
Min
Max
Unit
ALE Timings:
tLH
ALE High Pulse Width
20
ns
tAVLL
Address Valid to ALE Low Time
10
ns
tLLAX
ALE Low to Address Transition Time
10
ns
Write Timings:
tCLWL
CS_n (DMACK_n) Low to WR_n Low Time
0
ns
tWHCH
WR_n High to CS_n (DMACK_n) High Time
5
ns
tAVWL
A0 Valid to WR_n Low Time
0
ns
tWHAX
WR_n High to A0 Transition Time
5
ns
tWL
WR_n Low Pulse Width
20
ns
tWDSU
Write Data Setup Time
30
ns
tWDH
Write Data Hold Time
10
ns
tWC
Write Cycle Time
500
ns



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