IDT54FCT88915TT55PYB datasheet(4/11 Pages) IDT

Part #	IDT54FCT88915TT55PYB

Description	LOW SKEW PLL-BASED CMOS CLOCK DRIVER (WITH 3-STATE)

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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IDT54/74FCT88915TT 55/70/100/133

LOW SKEW PLL-BASED CMOS CLOCK DRIVER

MILITARY AND COMMERCIAL TEMPERATURE RANGES

9.7

4

POWER SUPPLY CHARACTERISTICS

OUTPUT FREQUENCY SPECIFICATIONS

NOTES:

1. Note 8 in "General AC Specification Notes" and Figure 2 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.

SYNC INPUT TIMING REQUIREMENTS

3053 tbl 06

3072 tbl 07

Symbol

Parameter

Min.

Max.

Unit

TRISE/FALL Rise/Fall Times,

SYNC inputs

(0.8V to 2.0V)

—

3.0

ns

Frequency Input Frequency,

SYNC Inputs

10(1)

2Q fmax

MHz

Duty Cycle Input Duty Cycle,

SYNC Inputs

25%

75%

—

Max.(2)

Symbol

Parameter

Min.

55

70

100

133

Unit

f2Q

Operating frequency 2Q Output

40

55

70

100

133

MHz

fQ

Operating frequency Q0-Q4, Q5 Outputs

20

27.5

35

50

66.7

MHz

fQ/2

Operating frequency Q/2 Output

10

13.75

17.5

25

33.3

MHz

Symbol

Parameter

Test Conditions(1)

Min.

Typ.(2)

Max.

Unit

∆ICC

Quiescent Power Supply Current

TTL Inputs HIGH

VCC = Max.

VIN = VCC –2.1V(3)

—

0.5

1.5

mA

ICCD

Dynamic Power Supply

Current(4)

VCC = Max.

All Outputs Open

VIN = VCC

VIN = GND

—

0.25

0.4

mA/

MHz

CPD

Power Dissipation Capacitance

50% Duty Cycle

—

15

40

pF

IC

Total Power Supply Current(5,6)

VCC = Max.

PLL_EN = 1, LOCK = 1, FEEDBACK = Q/2

SYNC frequency = 20MHz. Q/2 loaded with 50pF

All other outputs open

—25

40

mA

VCC = Max.

PLL_EN = 1, LOCK = 1, FEEDBACK = Q/2

SYNC frequency = 20MHz. Q/2 loaded with 50

Ω

Thevenin termination. All other outputs open

—42

60

mA

NOTES:

1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics.

2. Typical values are at VCC = 5.0V, +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

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.

3072 tbl 05

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