PI74FCT244DTQ datasheet(4/7 Pages) PERICOM

Part #	PI74FCT244DTQ

Description	Fast CMOS Octal Buffer/Line Drivers

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Manufacturer	PERICOM [Pericom Semiconductor Corporation]

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4 / 7 page

4

PS2011D

09/22/04

PI74FCT244T/2244T

PI74FCT541T/2541T

Octal Buffer/Line Drivers

Power Supply Characteristics

Parameters

Description

Test Conditions(1)

Min.

Typ(2)

Max.

Units

ICC

Quiescent Power

Supply Current

VCC = Max.

VIN = GND or VCC

0.1

500

µA

ΔICC

Supply Current per

Input @ TTL HIGH

VCC = Max.

VIN = 3.4V(3)

0.5

2.5

mA

ICCD

Supply Current per

Input per MHz(4)

VCC = Max.,

Outputs Open

OEA = OEB = GND or

OEA = GND, OEB = VCC

One Bit Toggling

50% Duty Cycle

VIN = VCC

VIN = GND

0.15

0.25

mA/

MHz

IC

Total Power Supply

Current(6)

VCC = Max.,

Outputs Open

fI = 10 MHZ

50% Duty Cycle

OEA = OEB = GND or

OEA = GND, OEB = VCC

One Bit Toggling

VIN = VCC

VIN = GND

1.5

3.5(5)

mA

VIN = 3.4V

VIN = GND

1.8

4.5(5)

VCC = Max.,

Outputs Open

fI = 2.5 MHZ

50% Duty Cycle

OEA = OEB = GND or

OEA = GND, OEB = VCC

Eight Bits Toggling

VIN = VCC

VIN = GND

3.0

6.0(5)

VIN = 3.4V

VIN = GND

5.0

14.0(5)

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.

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 + ΔICC DHNT + ICCD (fCP/2 + fINI)

ICC = Quiescent Current

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)

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.

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