AT94K05AL-25AQC Atmel, AT94K05AL-25AQC Datasheet - Page 42

• Manufacturer Part Number: AT94K05AL-25AQC
• Manufacturer: Atmel

Specifications of AT94K05AL-25AQC

• Device System Gates: 5000
• Propagation Delay Time: 12.1ns
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Operating Temperature Classification: Commercial
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Mounting: Surface Mount
• Pin Count: 100
• Package Type: PQFP
• Lead Free Status / RoHS Status: Not Compliant

4.4.2
4.4.3
4.4.4
42
AT94KAL Series FPSLIC
External Clock
No Clock/Oscillator Source
Timer Oscillator
To drive the device from an external clock source, XTAL2 should be left unconnected while
XTAL1 is driven as shown in
Figure 4-2.
When not in use, for low static IDD, add a pull-down resistor to XTAL1.
Figure 4-3.
For the timer oscillator pins, TOSC1 and TOSC2, the crystal is connected directly between the
pins. The oscillator is optimized for use with a 32.768 kHz watch crystal. An external clock signal
applied to this pin goes through the same amplifier having a bandwidth of 1 MHz. The external
clock signal should therefore be in the range
0 Hz – 1 MHz.
Figure 4-4.
External Clock Drive Configuration
No Clock/Oscillator Connections
Time Oscillator Connections
C
C
R
1
2
PD
Figure
NC
OSCILLATOR
EXTERNAL
4-2.
SIGNAL
R
NC
XTAL2
XTAL1
GND
B
R
S
TOSC2
TOSC1
R
XTAL2
XTAL1
GND
PD
= 4.7 KΩ
C
C
R
R
1
2
B
S
= 33 pF
= 27 pF
= 10M
= 200K
1138I–FPSLI–1/08