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AT43USB325 Datasheet(PDF) 98 Page - ATMEL Corporation

Part # AT43USB325
Description  Multimedia USB Keyboard Controller with Embedded Hub
PDF  109 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT43USB325 Datasheet(HTML) 98 Page - ATMEL Corporation

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98
3355C–USB–4/05
AT43USB325
Figure 9-1.
Synchronous Data Timing
Note:
1. With external 27
Ω series resistor.
Figure 9-2.
Full-speed Load
Table 9-7.
USB Driver Characteristics, Full Speed Operation
Symbol
Parameter
Condition
Min
Max
Unit
TR
Rise time
CL = 50 pF
4
20
ns
TF
Fall time
C
L = 50 pF
4
20
ns
TRFM
TR/TF matching
90
110
%
ZDRV
Driver output resistance(1)
Steady state drive
28
44
Ω
Table 9-8.
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
%
SCK
MOSI
MISO
SSN
tCSH
tCS
tH0
tDIS
HI-Z
tV
tH
VALID IN
HI-Z
tSU
tWH
tWL
tCSS
VIH
VIL
VIH
VIL
VIH
VIL
VOH
VOL
TxD+
TxD-
R
S
R
S
C
L
C
L
C
L = 50 pF



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