IDT74FCT827ASOB datasheet(4/7 Pages) IDT

Part #	IDT74FCT827ASOB

Description	HIGH-PERFORMANCE CMOS BUFFERS

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Manufacturer	IDT [Integrated Device Technology]

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7.20

4

IDT54/74FCT827A/B/C

HIGH-PERFORMANCE CMOS BUFFERS

MILITARY AND COMMERCIAL TEMPERATURE RANGES

POWER SUPPLY CHARACTERISTICS VLC = 0.2V; VHC = VCC – 0.2V

NOTES:

2609 tbl 07

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 = 5.0V, +25

°C ambient.

3. Per TTL driven input (VIN = 3.4V); all other inputs at VCC or GND.

4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.

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 (fCP/2 + fiNi)

ICC = Quiescent Current

∆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)

fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)

fi = Input Frequency

Ni = Number of Inputs at fi

All currents are in milliamps and all frequencies are in megahertz.

Symbol

Parameter

Test Conditions(1)

Min.

Typ.(2)

Max.

Unit

ICC

Quiescent Power Supply Current

VCC = Max.

VIN

≥ VHC; V IN ≤ VLC

—

0.2

1.5

mA

∆ICC

Quiescent Power Supply Current

TTL Inputs HIGH

VCC = Max.

VIN = 3.4V(3)

—

0.5

2.0

mA

ICCD

Dynamic Power Supply Current(4)

VCC = Max.

Outputs Open

OE1 = OE2 = GND

One Input Toggling

50% Duty Cycle

VIN

≥ VHC

VIN

≤ VLC

—

0.15

0.25

mA/

MHz

IC

Total Power Supply Current(6)

VCC = Max.

Outputs Open

fi = 10MHz

VIN

≥ VHC

VIN

≤ VLC

(FCT)

—

1.7

4.0

mA

50% Duty Cycle

OE1 = OE2 = GND

One Bit Toggling

VIN = 3.4V

VIN = GND

—

2.0

5.0

VCC = Max.

Outputs Open

fi = 2.5MHz

VIN

≥ VHC

VIN

≤ VLC

(FCT)

—

3.2

6.5(5)

50% Duty Cycle

OE1 = OE2 = GND

Eight Bits Toggling

VIN = 3.4V

VIN = GND

—

5.2

14.5(5)

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