OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

AT43301-AU

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27
16
1137J–USB–01/06
AT43301
4. Timing Waveforms
Figure 4-1. Data Signal Rise and Fall Time
Figure 4-2. Full-speed Load
Figure 4-3. Low-speed Downstream Port Load
Figure 4-4. Differential Data Jitter
V
CRS
RISE TIME FALL TIME
DIFFERENTIAL
DATA LINES
10%
90% 90%
10%
t
R
t
F
TxD+
TxD-
R
S
C
L
R
S
C
L
C
L
= 50pF
TxD+
TxD-
R
S
C
L
R
S
C
L
C
L
= 200pF to 600pF
3.6V
1.5KΩ
T
PERIOD
CROSSOVER
POINTS
DIFFERENTIAL
DATA LINES
CONSECUTIVE
TRANSITIONS
N*T
PERIOD
+T
XJR1
PAIRED
TRANSITIONS
N*T
PERIOD
+T
XJR2
17
1137J–USB–01/06
AT43301
Figure 4-5. Differential-to-EOP Transition Skew and EOP Width
Figure 4-6. Receiver Jitter Tolerance
T
PERIOD
CROSSOVER
POINT
EXTENDED
DIFFERENTIAL
DATA LINES
DIFF. DATA-to-
SE0 SKEW
N*T
PERIOD
+T
DEOP
SOURCE EOP WIDTH: T
FEOPT
T
LEOPT
RECEIVER EOP WIDTH: T
FEOPR,
T
LEOPR
T
PERIOD
DIFFERENTIAL
DATA LINES
CONSECUTIVE
TRANSITIONS
N*T
PERIOD
+T
JR1
T
JR
T
JR1
T
JR2
CONSECUTIVE
TRANSITIONS
N*T
PERIOD
+T
JR1
18
1137J–USB–01/06
AT43301
Figure 4-7. Hub Differential Delay, Differential Jitter, and SOP Distortion
Hub Differential Jitter:
T
HDJ1
= T
HDDX
(J) - T
HDDX
(K) or T
HDDX
(K) - T
HDDX
(J) Consecutive Transitions
T
HDJ2
= T
HDDX
(J) - T
HDDX
(J) or T
HDDX
(K) - T
HDDX
(K) Paired Transitions
Bit After Sop Width Distortion (Same as Data Jitter for Sop and Next J Transition):
T
SOP
= T
HDDX
(NEXTJ) - T
HDDX
(SOP)
Low-speed timings are determined in the same way for:
T
LHDD
, T
LDHJ1
, T
LDJH2
, T
LUHJ1
, T
LUJH2
, and T
LSOP
CROSSOVER
POINT
DIFFERENTIAL
DATA LINES
A. DOWNSTREAM HUB DELAY WITH CABLE
50% POINT OF
INITIAL SWING
UPSTREAM
END OF
CABLE
HUB DELAY
DOWNSTREAM
T
HDD1
CROSSOVER
POINT
DOWNSTREAM
PORT
CROSSOVER
POINT
HUB DELAY
UPSTREAM
T
HDD2
UPSTREAM
PORT
V
SS
V
SS
V
SS
V
SS
B. UPSTREAM HUB DELAY WITHOUT CABLE
CROSSOVER
POINT
DOWNSTREAM
PORT
CROSSOVER
POINT
HUB DELAY
UPSTREAM
T
HDD1,
T
HDD2
UPSTREAM
PORT OR END
OF CABLE
V
SS
V
SS
C. UPSTREAM HUB DELAY WITH OR WITHOUT CABLE
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27

AT43301-AU

Mfr. #:
Buy AT43301-AU
Manufacturer:
Microchip Technology / Atmel
Description:
USB Interface IC USB FOUR PORT HUB GANGED
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet