am79c30a Advanced Micro Devices, am79c30a Datasheet - Page 83

• Manufacturer Part Number: am79c30a
• Description: Digital Subscriber Controller ?dsc ?circuit
• Manufacturer: Advanced Micro Devices

OSC (XTAL2) Timing
Note:
Frequency = 12.288 MHz ±80 ppm.
MCLK Timing
Parameter Symbol
t
t
t
t
t
Parameter Symbol
t
t
t
t
t
t
t
CLCL
CH
CL
CLCH
CHCL
D
RISE1
RISE2
FALL1
FALL2
PWH
PWL
Note:
*Not TTL V
IH
Parameter Description
XTAL2 V
MCLK V
Rise Time
Rise Time
Fall Time
Fall Time
High Pulse Width
Low Pulse Width
V
CC
– 0.5 V*
t
CH
CC
CC
Parameter Description
Oscillator Period
High Time
Low Time
Rise Time
Fall Time
Figure 33. External Clock Driver (XTAL2) Timing
/2
/2 to
Am79C30A/32A Data Sheet
12.288 MHz
12.288 MHz
6.144 MHz
4.069 MHz
3.072 MHz
1.536 MHz
6.144 MHz
4.096 MHz
3.072 MHz
1.536 MHz
768 kHz
384 kHz
768 kHz
384 kHz
0.5 V
t
CL
Test Conditions
MCLK Load < 80pF
MCLK Load < 80pF
0.5 V to (VCC–0.5V)
MCLK Load < 40pF
1.0 V to 3.5 V
MCLK Load < 80pF
(VCC–0.5V) to 0.5 V
MCLK Load < 40pF
3.5 V to 1.0 V
MCLK Load < 80pF
MCLK Load < 80pF
Test Conditions
t
t
CLCH
CLCL
81.374
1.294
1.294
Min
33
33
Min
114
155
317
643
114
155
317
33
73
33
73
t
CHCL
81.387
Max
Max
60
15
15
10
10
5
5
09893H-25
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
ns
ns
ns
µs
ns
ns
ns
ns
ns
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