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74FCT388915T10PY Fiches technique(PDF) 4 Page - Integrated Device Technology

No de pièce 74FCT388915T10PY
Description  3.3V LOW SKEW PLL-BASED CMOS CLOCK DRIVER (WITH 3-STATE)
Download  10 Pages
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Fabricant  IDT [Integrated Device Technology]
Site Internet  http://www.idt.com
Logo IDT - Integrated Device Technology

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COMMERCIALTEMPERATURERANGE
4
IDT74FCT388915T
3.3V LOW SKEW PLL-BASED CMOS CLOCK DRIVER (3-STATE)
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
ΔICC
Quiescent Power Supply Current
VCC = Max.
VIN = VCC –0.6V(3)
—2
30
µ A
TTL Inputs HIGH
VIN = VCC –2.1V(3)
ICCD
Dynamic Power Supply Current(4)
VCC = Max.
VIN = VCC
0.2
0.3
mA/
All Outputs Open
VIN = GND
MHz
CPD
Power Dissipation Capacitance
50% Duty Cycle
15
25
pF
IC
Total Power Supply Current(6)
VCC = Max.
30
60
mA
PLL_EN = 1, LOCK = 1, FEEDBACK = Q4
SYNC frequency = 50MHz. All bits loaded with 15pF
VCC = Max.
90
120
mA
PLL_EN = 1, LOCK = 1, FEEDBACK = Q4
SYNC frequency = 50MHz. All bits loaded with 50
Ω Thevenin
terminationand20pF
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 3.3V, +25°C ambient.
3. Per TTL driven input. All other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. It is derived with Q frequency as the reference.
5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + DICC DHNT + ICCD (f) + ILOAD
ICC = Quiescent Current (ICCL
, ICCH and ICCZ)
ΔICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f = 2Q Frequency
ILOAD = Dynamic Current due to load.
OUTPUT FREQUENCY SPECIFICATIONS
Max. (2)
Symbol
Parameter
Min.
70
100
133(3)
150(3)
Unit
f2Q
Operating frequency 2Q Output
40
70
100
133
150
MHz
fQ
Operating frequency Q0-Q4,
Q5Outputs
20
35
50
66.7
75
MHz
fQ/2
Operating frequency Q/2 Output
10
17.5
25
33.3
37.5
MHz
SYNCH INPUT TIMING REQUIRMENTS
Symbol
Parameter
Min.
Max.
Unit
TRISE/FALL
Rise/Fall Times, SYNC inputs
3
ns
(0.8V to 2V)
Frequency
Input Frequency, SYNC Inputs
10(1)
2Q fmax
MHz
Duty Cycle Input Duty Cycle, SYNC Inputs
25%
75%
NOTES:
1. Note 7 in "General AC Specification Notes" and Figure 3 describes this specification and its actual limits depending on the feedback connection.
2. Maximum operating frequency is guaranteed with the part in a phase locked condition and all outputs loaded.
3. At this frequency, 2Q cannot be used as feedback.


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