AT43USB326-AU Atmel, AT43USB326-AU Datasheet - Page 78

• 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

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AT43USB326
Table 17. Oscillator Signals: XTAL1, XTAL2
Note:
Table 18. USB Driver Characteristics, Full-speed Operation
Note:
Figure 13. Full-speed Load
Symbol
V
V
CX1
CX2
C12
t
DL
Symbol
TR
TF
TRFM
ZDRV
SU
LH
HL
XTAL2 must not be used to drive other circuitry.
1. With external 27Ω series resistor.
Parameter
Rise time
Fall time
TR/TF matching
Driver output resistance
Parameter
OSC1 switching level
OSC1 switching level
Input capacitance, XTAL1
Output capacitance, XTAL2
OSC1/2 capacitance
Start-up time
Drive level
TxD+
TxD-
C
(1)
L
= 50 pF
Condition
6 MHz, fundamental
Condition
C
C
Steady state drive
L
L
= 50 pF
= 50 pF
R
R
S
S
C
C
L
L
0.47
0.67
Min
Min
90
28
4
4
Max
Max
1.20
1.44
110
20
20
44
10
10
50
5
2
3313D–USB–04/06
Unit
Unit
µW
ms
ns
ns
pF
pF
pF
%
Ω
V
V