AT43USB326-AC Atmel, AT43USB326-AC Datasheet - Page 79

• Manufacturer Part Number: AT43USB326-AC
• Description: IC USB KEYBOARD CTRLR HUB 48LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB326-AC

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: Mask ROM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: USB
• Number Of I /o: 32
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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