AT43USB326-AU Atmel, AT43USB326-AU Datasheet - Page 81

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

Specifications of AT43USB326-AU

• 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: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3313D–USB–04/06
Table 21. Hub Timings, Full-speed Operation
Table 22. Hub Timings, Low-speed Operation
Symbol
THDD2
THDJ1
THDJ2
TFSOP
TFEOPD
TFHESK
TLEOPD
TLHESK
Symbol
TLHDJ1
TLHDJ2
TLUHJ1
TLUHJ2
TLHDD
TSOP
Parameter
Hub Differential Data
Delay without cable
Hub Diff Driver Jitter to
Next Transition for Paired
Transitions
Data Bit Width Distortion
after SOP
Hub EOP Delay Relative
to THDD
Skew
Parameter
Hub Differential Data
Delay
Downstr Hub Diff Driver
Jitter to Next Transition,
downst for Paired
Transitions, downst to
Next Transition, upstr for
Paired Transitions, upstr
Data Bit Width Distortion
after SOP
Hub EOP Delay Relative
to THDD
Hub EOP Output Width
Skew
Hub EOP Output Width
Condition
Condition
AT43USB326
-300
Min
Min
-15
-45
-15
-45
-45
-60
-3
-1
-5
0
0
Max
Max
300
200
300
45
15
45
45
60
44
15
15
3
1
5
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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