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IDT54FCT388915T Datasheet PDF : 11 Pages
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IDT54/74FCT388915T 70/100/133/150
3.3V LOW SKEW PLL-BASED CMOS CLOCK DRIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
∆ICC
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Test Conditions(1)
VCC = Max.
VIN = VCC –0.6V(3)
VIN = VCC –2.1V(3)
Min. Typ.(2) Max. Unit
— 2.0 30 µA
ICCD
Dynamic Power Supply
Current(4)
VCC = Max.
All Outputs Open
VIN = VCC
VIN = GND
— 0.2 0.3 mA/
MHz
CPD Power Dissipation Capacitance 50% Duty Cycle
—
15
25 pF
IC
Total Power Supply Current(6)
VCC = Max.
PLL_EN = 1, LOCK = 1, FEEDBACK = Q4
—
30
60 mA
SYNC frequency = 50MHz. All bits loaded with
15pF
VCC = Max.
PLL_EN = 1, LOCK = 1, FEEDBACK = Q4
—
90 120 mA
SYNC frequency = 50MHz. All bits loaded with
50Ω Thevenin termination and 20pF
NOTES:
3052 tbl 05
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 + ∆ICC DHNT + ICCD (f) + ILOAD
ICC = Quiescent Current (ICCL, ICCH and ICCZ)
∆ICC = 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.
SYNC INPUT TIMING REQUIREMENTS
Symbol
Parameter
Min.
Max. Unit
TRISE/FALL Rise/Fall Times,
—
3.0
ns
SYNC inputs
(0.8V to 2.0V)
Frequency Input Frequency,
10.0(1) 2Q fmax MHz
SYNC Inputs
Duty Cycle Input Duty Cycle,
25%
75%
—
SYNC Inputs
3052 tbl 06
OUTPUT FREQUENCY SPECIFICATIONS
Max. (2)
Symbol
f2Q
fQ
Parameter
Operating frequency 2Q Output
Operating frequency Q0-Q4, Q5 Outputs
Min.
70
40
70
20
35
100
133
150
Unit
100
133
150
MHz
50
66.7
75
MHz
fQ/2
Operating frequency Q/2 Output
10
17.5
25
33.3
37.5
MHz
NOTES:
3052 tbl 07
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.
9.8
4
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