IDT74FCT388915T133

Manufacturer Part NumberIDT74FCT388915T133
ManufacturerIntegrated Device Technology, Inc.
IDT74FCT388915T133 datasheet
 

Specifications of IDT74FCT388915T133

CasePLCC/28Date_code00+
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
Page 6/11

Download datasheet (90Kb)Embed
PrevNext
IDT54/74FCT388915T 70/100/133/150
3.3V LOW SKEW PLL-BASED CMOS CLOCK DRIVER
NOTES:
7. The wiring diagrams and written explanations of Figure 3 demonstrate the input and output frequency relationships for various possible feedback
configurations. The allowable SYNC input range to stay in the phase-locked condition is also indicated. There are two allowable SYNC frequency ranges,
depending on whether FREQ_SEL is HIGH or LOW. Also it is possible to feed back the
input and the Q outputs. The table below summarizes the allowable SYNC frequency range for each possible configuration.
FREQ_SEL
Feedback
Level
Output
HIGH
Q/2
HIGH
Any Q (Q0-Q4)
Q5
HIGH
HIGH
2X_Q
LOW
Q/2
LOW
Any Q (Q0-Q4)
Q5
LOW
LOW
2X_Q
8. The tPD spec describes how the phase offset between the SYNC input and the output connected to the FEEDBACK input, varies with process, temperature
and voltage. Measurements were made with a 10MHz SYNC input and Q/2 output as feedback. The phase measurements were made at 1.5V. The Q/
2 output was terminated at the FEEDBACK input with 100 to VCC and 100 to ground. tPD measurements were made with the loop filter connection
shown below:
External Loop
LF
Filter
0.1 F
Allowable SYNC Input
Frequency Range (MH
)
Z
10 to (2x _Q f
Spec)/4
MAX
20 to (2x_Q f
Spec)/2
MAX
20 to (2x_Q f
Spec)/2
MAX
40 to (2x_Q f
Spec)
MAX
5 to (2x_Q f
Spec)/8
MAX
10 to (2x_Q f
Spec)/4
MAX
10 to (2x_Q f
Spec)/4
MAX
20 to (2x_Q f
Spec)/2
MAX
C1
Analog GND
3052 drw 04
9.8
MILITARY AND COMMERCIAL TEMPERATURE RANGES
Q5
output, thus creating a 180 phase shift between the SYNC
Phase Relationship
Corresponding 2Q Output
of the Q Outputs
Frequency Range
to Rising SYNC Edge
40 to (2Q f
Spec)
MAX
40 to (2Q f
Spec)
MAX
40 to (2Q f
Spec)
MAX
40 to (2Q f
Spec)
MAX
20 to (2Q f
Spec)/2
MAX
20 to (2Q f
Spec)/2
MAX
20 to (2Q f
Spec)/2
MAX
20 to (2Q f
Spec)/2
MAX
0
0
180
0
0
0
180
0
3052 tbl 09
6