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FT122 Datasheet(PDF) 35 Page - Future Technology Devices International Ltd.

Part # FT122
Description  FT122 ENHANCED USB DEVICE CONTROLLER WITH PARALLEL BUS IC Datasheet Version 1.1
PDF  47 Pages
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Manufacturer  FTDI [Future Technology Devices International Ltd.]
Direct Link  http://www.ftdichip.com
Logo FTDI - Future Technology Devices International Ltd.

FT122 Datasheet(HTML) 35 Page - Future Technology Devices International Ltd.

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Copyright © 2014 Future Technology Devices International Limited
35
Document No.: FT_000647
FT122 ENHANCED USB DEVICE CONTROLLER WITH PARALLEL
BUS
IC Datasheet Version 1.1
Clearance No.: FTDI#
313
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
1.62
V
I source = 4mA
Vol
Output Voltage Low
0.4
V
I sink = 4mA
Vih
Input Voltage High
1.17
V
Vil
Input Voltage Low
-
0.63
V
Table 8-5 digital I/O Pin Characteristics (VCCIO=+1.8V)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
UVoh
I/O Pins Static Output
(High)
2.8
3.6
V
RL = 1.5kΩ to 3.6
V
UVol
I/O Pins Static Output
(Low)
-
0.3
V
RL = 15kΩ to GND
UVse
Single Ended Rx
Threshold
0.8
2.0
V
UCom
Differential Common
Mode
0.8
2.5
V
UVDif
Differential Input
Sensitivity
0.2
V
UDrvZ
Driver Output
Impedance
29
-
44
Ω
Including external
22 Ω ±1% series
resistor
Table 8-6 USB I/O Pin (DP, USBDM) Characteristics
8.3 AC Characteristics
Symbol
Parameter
VCCIO=3.3V VCCIO=1.8V
Unit
Min
Max
Min
Max
ALE Timings:
tLH
ALE High Pulse Width
20
20
ns
tAVLL
Address Valid to ALE Low Time
3
5
ns
tLLAX
ALE Low to Address Transition Time
2
3
ns
Write Timings:
tCLWL
CS_n (DMACK_n) Low to WR_n Low Time
0
1
ns
tWHCH
WR_n High to CS_n (DMACK_n) High Time
1
1
ns



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