AT43USB325E-AU Atmel, AT43USB325E-AU Datasheet - Page 97

• Manufacturer Part Number: AT43USB325E-AU
• Description: IC USB KEYBOARD CTRLR 64LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB325E-AU

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: SRAM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: SPI, 3-Wire Serial
• Number Of I /o: 42
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.2.1
3355C–USB–4/05
AC Characteristics
Table 9-4.
Note:
Table 9-5.
Note:
Table 9-6.
Symbol
V
RPU
V
V
V
V
V
V
C
Symbol
V
V
CX1
CX2
C12
t
DL
Symbol
f
t
t
t
t
t
t
t
SU
SCK
RO
CSS
CSH
SU
H
HO
V
OL2
OL4
OH4
IL3
IH3
IL4
IH4
LH
HL
, t
FO
VCEXT is the voltage at CEXT1, CEXT2.
XTAL2 must not be used to drive other circuitry.
PC Pull-up resistor current
Parameter
Output Low Level, PA, PB,
PE[0:3]
Input Low Level, PC
Input High Level, PC
Input Low Level, PD[0,1]
Input High Level, PD[0,1]
Output Low Level, PD[0,1]
Output High Level, PD[0,1]
Input/Output capacitance
Parameter
OSC1 switching level
OSC1 switching level
Input capacitance, XTAL1
Output capacitance, XTAL2
OSC1/2 capacitance
Start-up time
Drive level
Parameter
SCK Clock Frequency 50% duty cycle
Output Rise Time, Fall Time
SSN Setup Time
SSN Hold Time
Data IN Setup Time
Data In Hold Time
Output Hold Time
Output Valid
PA, PB, PC, PD, PE, PF
Oscillator Signals: XTAL1, XTAL2
SEEPROM SPI Timing
Condition
6 MHz, fundamental
Condition
IOL = 4 mA
V = 0
IOL = 4 mA
IOH = 4 mA
1 MHz
Condition
0.7 VCEXT
0.7 VCEXT
0.7 VCEXT
Min
90
0.47
0.67
Min
AT43USB325
Min
333
10
10
-5
0
0
2
0
0.3 VCEXT
0.3 VCEXT
0.3 VCEXT
Max
280
Max
1.20
1.44
0.5
10
10
10
50
5
2
Max
333
10
20
20
10
5
Unit
µW
ms
pF
pF
pF
Unit
Unit
V
V
µA
pF
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
V
V
V
V
V
V
97