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AT43USB326 Datasheet(PDF) 79 Page - ATMEL Corporation

Part # AT43USB326
Description  Multimedia USB Keyboard Controller with Embedded Hub
PDF  102 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT43USB326 Datasheet(HTML) 79 Page - ATMEL Corporation

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79
AT43USB326
3313D–USB–04/06
Figure 14. Low-speed Downstream Port Load
Note:
1. With 6.000 MHz, 100 ppm crystal.
Table 19. USB Driver Characteristics, Low-speed Operation
Symbol
Parameter
Condition
Min
Max
Unit
TR
Rise time
CL = 200 - 600 pF
75
300
ns
TF
Fall time
CL = 200 - 600 pF
75
300
ns
TRFM
TR/TF matching
80
125
%
TxD+
TxD-
R
S
R
S
C
L
C
L
C
L = 200 pF to 600 pF
3.6V
1.5 K Ohm
Table 20. USB Source Timings, Full-speed Operation
Symbol
Parameter
Condition
Min
Max
Unit
TDRATE
Full Speed Data Rate(1)
Average Bit Rate
11.97
12.03
Mb/s
TFRAME
Frame Interval(1)
0.9995
1.0005
ms
TRFI
Consecutive Frame Interval Jitter(1)
No clock adjustment
42
ns
TRFIADJ
Consecutive Frame Interval Jitter(1)
With clock adjustment
126
ns
TDJ1
TDJ2
Source Diff Driver Jitter
To Next Transition
For Paired Transitions
-2
-1
2
1
ns
TFDEOP
Source Jitter for Differential Transition to
SEO Transitions
-2
5
ns
TDEOP
Differential to EOP Transition Skew
-2
5
ns
TJR1
TJR2
Receiver Data Jitter Tolerance
To Next Transition
For Paired Transitions
-18.5
-9
18.5
9
ns
TFEOPT
Source SEO interval of EOP
160
175
ns
TFEOPR
Receiver SEO interval of EOP
82
ns
TFST
Width of SEO interval during differential
transition
14
ns



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