mk1493-05 Integrated Device Technology, mk1493-05 Datasheet - Page 12

• Manufacturer Part Number: mk1493-05
• Description: Differential Spread Spectrum Clock Driver
• Manufacturer: Integrated Device Technology

Electrical Characteristics - AC
Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature -40 to +85 C, C
1
de-asserted unless its already disabled.
2
Measurement Diagrams
Measurement diagram for duty cycle and jitter.
Current Reference Source (Iref)
If board target trace impedance (Z) is 50 , then Rr = 475 (1%), providing IREF of 2.32 mA, output current (I
6*IREF.
Thermal Characteristics
IDT™ DIFFERENTIAL SPREAD SPECTRUM CLOCK DRIVER
Output Enable Time
Output Disable Time
Stabilization Time
Spread Change Time
CLKOUT and SMBus pins are tri-stated when PWRDN/ is asserted. CLKOUT is driven differential when PWRDN/ is
The period is when VDD equals its typical VDD condition.
MK1493-05
DIFFERENTIAL SPREAD SPECTRUM CLOCK DRIVER
Parameter
Thermal Resistance Junction to
Ambient
Thermal Resistance Junction to Case
2
1
1
Parameter
1.5V
TpZL,TpZH All outputs
TpLZ,TpHZ All outputs
Symbol
Tspread
Tstable
from power-up
Settling period after spread change
High Duty Cycle %
Symbol
Conditions
JA
JA
JA
JC
Still air
1 m/s air flow
3 m/s air flow
12
Conditions
T
PERIOD
Min.
Low Duty Cycle %
600
Min.
L
= 15 pF
Typ.
3.0
3.0
Typ.
78
70
68
37
Max.
1200
MK1493-05
10
CLOCK SYNTHESIZER
Max. Units
Units
ms
ms
OH
us
ps
C/W
C/W
C/W
C/W
) is equal to
REV G 011608