AT94K05AL-25BQX Atmel, AT94K05AL-25BQX Datasheet - Page 42
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AT94K05AL-25BQX
Manufacturer Part Number
AT94K05AL-25BQX
Description
Manufacturer
Atmel
Datasheet
1.AT94K05AL-25BQX.pdf
(204 pages)
Specifications of AT94K05AL-25BQX
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
144
Package Type
LQFP
Lead Free Status / RoHS Status
Compliant
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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
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